Cypress Clock CY7B9911V User Manual

CY7B9911V  
3.3V RoboClock+™  
High Speed Low Voltage Programmable Skew  
Clock Buffer  
Features  
Functional Description  
All output pair skew <100 ps typical (250 max)  
3.75 to 110 MHz output operation  
The CY7B9911V 3.3V RoboClock+™ High Speed Low  
Voltage Programmable Skew Clock Buffer (LVPSCB) offers  
user selectable control over system clock functions. These  
multiple output clock drivers provide the system integrator with  
functions necessary to optimize the timing of high perfor-  
mance computer systems. Each of the eight individual drivers,  
arranged in four pairs of user controllable outputs, can drive  
terminated transmission lines with impedances as low as 50Ω.  
User selectable output functions  
Selectable skew to 18 ns  
Inverted and non-inverted  
1
1
Operation at and input frequency  
2
4
Operation at 2x and 4x input frequency (input as low as  
3.75 MHz)  
They deliver minimal and specified output skews and full swing logic  
levels (LVTTL).  
Zero input-to-output delay  
50% duty cycle outputs  
Each output is hardwired to one of nine delay or function  
configurations. Delay increments of 0.7 to 1.5 ns are deter-  
mined by the operating frequency with outputs that can skew  
up to ±6 time units from their nominal “zero” skew position. The  
completely integrated PLL allows external load and cancels  
the transmission line delay effects. When this “zero delay”  
capability of the LVPSCB is combined with the selectable  
output skew functions, you can create output-to-output delays  
of up to ±12 time units.  
LVTTL outputs drive 50Ω terminated lines  
Operates from a single 3.3V supply  
Low operating current  
32-pin PLCC package  
Jitter 100 ps (typical)  
Divide-by-two and divide-by-four output functions are provided  
for additional flexibility in designing complex clock systems.  
When combined with the internal PLL, these divide functions  
allow distribution of a low frequency clock that are multiplied  
by two or four at the clock destination. This facility minimizes  
clock distribution difficulty enabling maximum system clock  
speed and flexibility.  
Logic Block Diagram  
TEST  
PHASE  
FB  
VCO AND  
TIME UNIT  
GENERATOR  
FREQ  
DET  
FILTER  
REF  
FS  
4Q0  
4Q1  
4F0  
4F1  
SELECT  
INPUTS  
(THREE  
LEVEL)  
SKEW  
SELECT  
MATRIX  
3Q0  
3Q1  
3F0  
3F1  
2Q0  
2Q1  
2F0  
2F1  
1Q0  
1Q1  
1F0  
1F1  
Cypress Semiconductor Corporation  
Document Number: 38-07408 Rev. *D  
198 Champion Court  
San Jose, CA 95134-1709  
408-943-2600  
Revised June 20, 2007  
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CY7B9911V  
3.3V RoboClock+™  
Skew Select Matrix  
Block Diagram Description  
The skew select matrix is comprised of four independent  
sections. Each section has two low skew, high fanout drivers  
(xQ0, xQ1), and two corresponding three level function select  
(xF0, xF1) inputs. Table 2 shows the nine possible output  
functions for each section as determined by the function select  
inputs. All times are measured with respect to the REF input  
Phase Frequency Detector and Filter  
The Phase Frequency Detector and Filter blocks accept inputs  
from the Reference Frequency (REF) input and the Feedback  
(FB) input. They generate correction information to control the  
frequency of the Voltage Controlled Oscillator (VCO). These  
blocks, along with the VCO, form a Phase Locked Loop (PLL)  
that tracks the incoming REF signal.  
assuming that the output connected to the FB input has 0t  
U
selected.  
Table 2. Programmable Skew Configurations  
VCO and Time Unit Generator  
Function Selects  
Output Functions  
The VCO accepts analog control inputs from the PLL filter block.  
It generates a frequency used by the time unit generator to  
create discrete time units that are selected in the skew select  
matrix. The operational range of the VCO is determined by the  
1F1,2F1, 1F0,2F0, 1Q0,1Q1,  
3F1, 4F1 3F0, 4F0 2Q0, 2Q1  
3Q0, 3Q1 4Q0, 4Q1  
LOW  
LOW  
LOW  
MID  
LOW  
MID  
–4t  
–3t  
–2t  
–1t  
Divide by 2 Divide by 2  
U
U
U
U
FS control pin. The time unit (t ) is determined by the operating  
U
–6t  
–4t  
–2t  
–6t  
–4t  
–2t  
frequency of the device and the level of the FS pin as shown in  
U
U
U
U
U
U
HIGH  
LOW  
MID  
[1]  
Table 1. Frequency Range Select and t Calculation  
U
MID  
0t  
0t  
0t  
U
U
U
f
(MHz)  
NOM  
1
Approximate  
tU = -----------------------  
[2, 3]  
MID  
HIGH  
LOW  
MID  
+1t  
+2t  
+3t  
+4t  
+2t  
+4t  
+6t  
+2t  
+4t  
+6t  
U
U
U
U
U
U
U
U
U
U
FS  
Frequency(MHz)At  
fNOM × N  
Min Max  
Which t = 1.0 ns  
HIGH  
HIGH  
HIGH  
U
where N =  
LOW  
MID  
15  
25  
40  
30  
50  
44  
26  
16  
22.7  
38.5  
62.5  
HIGH  
Divide by 4 Inverted  
HIGH  
110  
Notes  
1. For all three-state inputs, HIGH indicates a connection to V , LOW indicates a connection to GND, and MID indicates an open connection. Internal termination  
CC  
circuitry holds an unconnected input to V /2.  
CC  
2. The level to be set on FS is determined by the “normal” operating frequency (f  
) of the V and Time Unit Generator (see). Nominal frequency (f  
) always  
NOM  
NOM  
appears at 1Q0 and the other outputs when they are operated in their undivided modes (see Table 2). The frequency appearing at the REF and FB inputs is f  
NOM  
when the output connected to FB is undivided. The frequency of the REF and FB inputs is f  
using a divided output as the FB input.  
/4 when the part is configured for a frequency multiplication  
NOM  
NOM  
3. When the FS pin is selected HIGH, the REF input must not transition upon power up until V has reached 2.8V.  
CC  
Document Number: 38-07408 Rev. *D  
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CY7B9911V  
3.3V RoboClock+™  
Figure 1 shows the typical outputs with FB connected to a zero skew output.  
Figure 1. The Typical Outputs with FB Connected to a Zero Skew Output  
FB Input  
REFInput  
1Fx  
2Fx  
3Fx  
4Fx  
(N/A)  
LM  
– 6t  
– 4t  
– 3t  
U
U
U
LL  
LH  
LM  
(N/A)  
LH  
ML  
ML  
– 2t  
– 1t  
U
U
(N/A)  
MM  
MH  
HL  
MM  
(N/A)  
MH  
0t  
U
+1t  
+2t  
+3t  
U
U
U
HM  
(N/A)  
HH  
HL  
HM  
+4t  
+6t  
U
U
(N/A)  
(N/A)  
(N/A)  
LL/HH  
HH  
DIVIDED  
INVERT  
If the TEST input is forced to its MID or HIGH state, the device  
operates with its internal phase locked loop disconnected, and  
input levels supplied to REF directly control all outputs. Relative  
output-to-output functions are the same as in normal mode.  
Test Mode  
The TEST input is a three level input. In normal system  
operation, this pin is connected to ground, allowing the  
CY7B9911V to operate as described in “Block Diagram  
Description” on page 3. For testing purposes, any of the three  
level inputs can have a removable jumper to ground or be tied  
LOW through a 100W resistor. This enables an external tester to  
change the state of these pins.  
In contrast with normal operation (TEST tied LOW), all outputs  
function based only on the connection of their own function  
select inputs (xF0 and xF1) and the waveform characteristics of  
the REF input.  
Note  
4. FB connected to an output selected for “zero” skew (that is, xF1 = xF0 = MID).  
Document Number: 38-07408 Rev. *D  
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CY7B9911V  
3.3V RoboClock+™  
Operational Mode Descriptions  
Figure 2. Zero Skew and Zero Delay Clock Driver  
REF  
LOAD  
Z
Z
0
L1  
L2  
FB  
SYSTEM  
CLOCK  
REF  
FS  
LOAD  
LOAD  
4Q0  
4Q1  
4F0  
4F1  
0
3Q0  
3Q1  
3F0  
3F1  
L3  
L4  
2F0  
2F1  
2Q0  
2Q1  
Z
0
1F0  
1F1  
1Q0  
1Q1  
LOAD  
TEST  
Z
0
LENGTH L1 = L2 = L3 = L4  
Figure 2 shows the LVPSCB configured as a zero skew clock buffer. In this mode the CY7B9911V is used as the basis for a low skew  
clock distribution tree. When all the function select inputs (xF0, xF1) are left open, each of the outputs are aligned and drive a  
terminated transmission line to an independent load. The FB input is tied to any output in this configuration and the operating frequency  
range is selected with the FS pin. The low skew specification, along with the ability to drive terminated transmission lines (with  
impedances as low as 50Ω), enables efficient printed circuit board design.  
Figure 3. Programmable Skew Clock Driver  
REF  
LOAD  
Z
0
L1  
L2  
FB  
REF  
FS  
SYSTEM  
CLOCK  
LOAD  
LOAD  
4Q0  
4Q1  
4F0  
4F1  
Z
0
3Q0  
3Q1  
3F0  
3F1  
L3  
L4  
2F0  
2F1  
2Q0  
2Q1  
Z
0
1F0  
1F1  
1Q0  
1Q1  
LOAD  
TEST  
Z
0
LENGTH L1 = L2  
L3 < L2 by 6 inches  
L4 > L2 by 6 inches  
Figure 3 shows a configuration to equalize skew between metal  
traces of different lengths. In addition to low skew between  
outputs, the LVPSCB is programmed to stagger the timing of its  
outputs. Each of the four groups of output pairs is programmed  
to different output timing. Skew timing is adjusted over a wide  
range in small increments with the appropriate strapping of the  
function select pins. In this configuration the 4Q0 output is sent  
back to FB and configured for zero skew. The other three pairs  
of outputs are programmed to yield different skews relative to the  
feedback. By advancing the clock signal on the longer traces or  
retarding the clock signal on shorter traces, all loads receive the  
clock pulse at the same time.  
In Figure 3 the FB input is connected to an output with 0 ns skew  
(xF1, xF0 = MID) selected. The internal PLL synchronizes the FB  
and REF inputs and aligns their rising edges to make certain that  
all outputs have precise phase alignment.  
Clock skews are advanced by ±6 time units (tU) when using an  
output selected for zero skew as the feedback. A wider range of  
delays is possible if the output connected to FB is also skewed.  
Since “Zero Skew”, +tU, and –tU are defined relative to output  
Document Number: 38-07408 Rev. *D  
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CY7B9911V  
3.3V RoboClock+™  
groups, and the PLL aligns the rising edges of REF and FB, you  
can create wider output skews by proper selection of the xFn  
inputs. For example, a +10 tU between REF and 3Qx is achieved  
by connecting 1Q0 to FB and setting 1F0 = 1F1 = GND, 3F0 =  
MID, and 3F1 = High. (Since FB aligns at –4 tU and 3Qx skews  
to +6 tU, a total of +10 tU skew is realized). Many other configu-  
rations are realized by skewing both the outputs used as the FB  
input and skewing the other outputs.  
Figure 5 shows the LVPSCB configured as a clock multiplier. The  
3Q0 output is programmed to divide by four and is sent back to  
FB. This causes the PLL to increase its frequency until the 3Q0  
and 3Q1 outputs are locked at 20 MHz, while the 1Qx and 2Qx  
outputs run at 80 MHz. The 4Q0 and 4Q1 outputs are  
programmed to divide by two, that results in a 40 MHz waveform  
at these outputs. Note that the 20 and 40 MHz clocks fall simul-  
taneously and are out of phase on their rising edge. This enables  
1
1
the designer to use the rising edges of the frequency and ⁄  
2
4
Figure 4. Inverted Output Connections  
frequency outputs without concern for rising edge skew. The  
2Q0, 2Q1, 1Q0, and 1Q1 outputs run at 80 MHz and are skewed  
by programming their select inputs accordingly. Note that the FS  
pin is wired for 80 MHz operation because that is the frequency  
of the fastest output.  
REF  
FB  
Figure 6. Frequency Divider Connections  
REF  
FS  
REF  
4Q0  
4Q1  
4F0  
4F1  
FB  
REF  
FS  
3Q0  
3Q1  
3F0  
3F1  
20 MHz  
2Q0  
2Q1  
2F0  
2F1  
10 MHz  
4Q0  
4F0  
4Q1  
4F1  
1Q0  
1Q1  
5 MHz  
1F0  
1F1  
3Q0  
3Q1  
3F0  
3F1  
20 MHz  
TEST  
2Q0  
2Q1  
2F0  
2F1  
1F0  
1F1  
1Q0  
1Q1  
Figure 4 shows an example of the invert function of the LVPSCB.  
In this example, the 4Q0 output used as the FB input is  
programmed for invert (4F0 = 4F1 = HIGH) while the other three  
pairs of outputs are programmed for zero skew. When 4F0 and  
4F1 are tied HIGH, 4Q0 and 4Q1 become inverted zero phase  
outputs. The PLL aligns the rising edge of the FB input with the  
rising edge of the REF. This causes the 1Q, 2Q, and 3Q outputs  
to become the “inverted” outputs with respect to the REF input.  
By selecting the output connected to FB, you can have two  
inverted and six non-inverted outputs or six inverted and two  
non-inverted outputs. The correct configuration is determined by  
the need for more (or fewer) inverted outputs. 1Q, 2Q, and 3Q  
outputs are also skewed to compensate for varying trace delays  
independent of inversion on 4Q.  
TEST  
Figure 6 shows the LVPSCB in a clock divider application. 2Q0  
is sent back to the FB input and programmed for zero skew. 3Qx  
is programmed to divide by four. 4Qx is programmed to divide by  
two. Note that the falling edges of the 4Qx and 3Qx outputs are  
aligned. This enables use of the rising edges of the frequency  
and frequency without concern for skew mismatch. The 1Qx  
outputs are programmed to zero skew and are aligned with the  
2Qx outputs. In this example, the FS input is grounded to  
configure the device in the 15 to 30 MHz range, since the highest  
frequency output is running at 20 MHz.  
1
2
1
4
Figure 5. Frequency Multiplier with Skew Connections  
Figure 7 shows some of the functions that are selectable on the  
3Qx and 4Qx outputs. These include inverted outputs and  
outputs that offer divide-by-2 and divide-by-4 timing. An inverted  
output enables the system designer to clock different  
subsystems on opposite edges, without suffering from the pulse  
asymmetry typical of non-ideal loading. This function enables  
each of the two subsystems to clock 180 degrees out of phase,  
but still is aligned within the skew specification.  
REF  
FB  
20 MHz  
REF  
FS  
40 MHz  
4Q0  
4Q1  
4F0  
4F1  
The divided outputs offer a zero delay divider for portions of the  
system that divide the clock by either two or four, and still remain  
within a narrow skew of the “1X” clock. Without this feature, an  
external divider is added, and the propagation delay of the  
divider adds to the skew between the different clock signals.  
20 MHz  
80 MHz  
3Q0  
3Q1  
3F0  
3F1  
2F0  
2F1  
2Q0  
2Q1  
1Q0  
1Q1  
1F0  
1F1  
TEST  
These divided outputs, coupled with the Phase Locked Loop,  
allow the LVPSCB to multiply the clock rate at the REF input by  
either two or four. This mode enables the designer to distribute  
a low frequency clock between various portions of the system,  
and then locally multiply the clock rate to a more suitable  
Document Number: 38-07408 Rev. *D  
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CY7B9911V  
3.3V RoboClock+™  
frequency, while still maintaining the low skew characteristics of  
the clock driver. The LVPSCB performs all of the functions  
described in this section at the same time. It can multiply by two  
and four or divide by two (and four) at the same time. This shifts  
its outputs over a wide range or maintain zero skew between  
selected outputs.  
Figure 7. Multi-Function Clock Driver  
REF  
LOAD  
Z
0
110 MHz  
INVERTED  
FB  
REF  
FS  
27.5 MHz  
DISTRIBUTION  
CLOCK  
LOAD  
LOAD  
4Q0  
4Q1  
4F0  
4F1  
27.5 MHz  
Z
0
3Q0  
3Q1  
2Q0  
2Q1  
3F0  
3F1  
2F0  
2F1  
110 MHz  
ZERO SKEW  
Z
0
1Q0  
1Q1  
1F0  
LOAD  
110 MHz  
SKEWED –2.273 ns (–4tU)  
1F1  
TEST  
Z
0
Figure 8. Board-to-Board Clock Distribution  
LOAD  
REF  
Z
0
L1  
FB  
LOAD  
LOAD  
SYSTEM  
CLOCK  
REF  
FS  
4F0  
4F1  
L2  
Z
0
4Q0  
4Q1  
3Q0  
3Q1  
3F0  
3F1  
L3  
2F0  
2F1  
2Q0  
2Q1  
Z
0
1F0  
1F1  
1Q0  
1Q1  
L4  
FB  
REF  
TEST  
FS  
LOAD  
4Q0  
4Q1  
4F0  
4F1  
3F0  
3F1  
2F0  
2F1  
Z
0
3Q0  
3Q1  
2Q0  
2Q1  
LOAD  
1F0  
1Q0  
1Q1  
1F1  
TEST  
Figure 8 shows the CY7B9911V connected in series to construct a zero skew clock distribution tree between boards. Delays of the  
downstream clock buffers are programmed to compensate for the wire length (that is, select negative skew equal to the wire delay)  
necessary to connect them to the master clock source, approximating a zero delay clock tree. Cascaded clock buffers accumulates  
low frequency jitter because of the non-ideal filtering characteristics of the PLL filter. Do not connect more than two clock buffers in a  
series.  
Document Number: 38-07408 Rev. *D  
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CY7B9911V  
3.3V RoboClock+™  
Output Current into Outputs (LOW)............................. 64 mA  
Maximum Ratings  
Static Discharge Voltage...........................................> 2001V  
(MIL-STD-883, Method 3015)  
Operating outside these boundaries may affect the performance  
and life of the device. These user guidelines are not tested.  
Latch up Current.....................................................> 200 mA  
Storage Temperature ................................. –65°C to +150°C  
Operating Range  
Ambient Temperature with  
Power Applied ............................................ –55°C to +125°C  
Range  
Ambient Temperature  
V
CC  
Supply Voltage to Ground Potential................–0.5V to +7.0V  
DC Input Voltage ............................................–0.5V to +7.0V  
Commercial  
0°C to +70°C  
3.3V ± 10%  
Electrical Characteristics  
Over the Operating Range  
CY7B9911V  
Parameter  
Description  
Output HIGH Voltage  
Test Conditions  
= Min, I = –18 mA  
Unit  
Min  
Max  
V
V
V
V
V
V
V
2.4  
V
V
V
V
V
OH  
OL  
IH  
CC  
OH  
Output LOW Voltage  
= Min, I = 35 mA  
0.45  
CC  
OL  
Input HIGH Voltage (REF and FB inputs only)  
Input LOW Voltage (REF and FB inputs only)  
Three Level Input HIGH Voltage (Test, FS,  
2.0  
–0.5  
V
CC  
0.8  
IL  
Min V Max  
0.87 * V  
V
CC  
IHH  
CC  
CC  
xFn)  
V
V
I
Three Level Input MID Voltage (Test, FS,  
xFn)  
Min V Max  
0.47 * V  
0.0  
0.53 * V  
V
V
IMM  
ILL  
CC  
CC  
CC  
Three Level Input LOW Voltage (Test, FS,  
Min V Max  
0.13 * V  
20  
CC  
CC  
xFn)  
Input HIGH Leakage Current (REF and FB  
inputs only)  
V
= Max, V = Max  
μA  
μA  
IH  
CC  
CC  
IN  
I
Input LOW Leakage Current (REF and FB  
inputs only)  
V
= Max, V = 0.4V  
–20  
–50  
IL  
IN  
I
I
I
I
I
Input HIGH Current (Test, FS, xFn)  
Input MID Current (Test, FS, xFn)  
Input LOW Current (Test, FS, xFn)  
V
V
V
V
V
= V  
CC  
200  
50  
μA  
μA  
IHH  
IMM  
ILL  
IN  
= V /2  
IN  
CC  
= GND  
–200  
–200  
95  
μA  
IN  
Short Circuit Current  
= MAX, V  
= GND (25° only)  
mA  
mA  
OS  
CC  
OUT  
Operating Current Used by Internal Circuitry  
= V  
= Max, All Com’l  
CCQ  
CCN  
CCQ  
Input Selects Open  
Mil/Ind  
100  
19  
I
Output Buffer Current per Output Pair  
V
= V = Max,  
mA  
CCN  
CCN  
CCQ  
I
= 0 mA Input Selects Open, f  
OUT  
MAX  
MAX  
[9]  
PD  
Power Dissipation per Output Pair  
V
= V  
= Max,  
104  
mW  
CCN  
CCQ  
I
= 0 mA Input Selects Open, f  
OUT  
Notes  
5. For more information see Group A subgroup testing information.  
6. These inputs are normally wired to VCC, GND, or left unconnected (actual threshold voltages vary as a percentage of VCC). Internal termination resistors hold  
unconnected inputs at VCC/2. If these inputs are switched, the function and timing of the outputs glitch and the PLL may require an additional tLOCK time  
before all data sheet limits are achieved.  
7. CY7B9911V must be tested one output at a time, output shorted for less than one second, less than 10% duty cycle. Room temperature only.  
8. Total output current per output pair is approximated by the following expression that includes device current plus load current:  
CY7B9911V:ICCN = [(4 + 0.11F) + [[((835 –3F)/Z) + (.0022FC)]N] x 1.1  
Where  
F = frequency in MHz  
C = capacitive load in pF  
Z = line impedance in ohms  
N = number of loaded outputs; 0, 1, or 2  
FC = F < C  
9. Total power dissipation per output pair is approximated by the following expression that includes device power dissipation plus power dissipation due to the  
load circuit:  
PD = [(22 + 0.61F) + [[(1550 + 2.7F)/Z) + (.0125FC)]N] x 1.1. (See note 8 for variable definition.)  
Document Number: 38-07408 Rev. *D  
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CY7B9911V  
3.3V RoboClock+™  
Capacitance  
[10]  
Tested initially and after any design or process changes that may affect these parameters.  
Parameter  
Description  
Test Conditions  
T = 25°C, f = 1 MHz, V = 3.3V  
Max  
Unit  
C
Input Capacitance  
10  
pF  
IN  
A
CC  
Note  
10. Applies to REF and FB inputs only.  
AC Test Loads and Waveforms  
Figure 9. AC Test Loads and Waveforms  
VCC  
3.0V  
2.0V  
=1.5V  
0.8V  
2.0V  
=1.5V  
0.8V  
R1=100  
R2=100  
R1  
R2  
V
th  
V
th  
C = 30 pF  
L
0.0V  
C
L
(Includes fixture and probe capacitance)  
1ns  
1ns  
TTL ACTest Load  
TTL Input Test Waveform  
Switching Characteristics – 5 Option  
[2, 11]  
Over the Operating Range  
CY7B9911V-5  
Typ  
Parameter  
Description  
FS = LOW  
Unit  
Min  
15  
Max  
[1, 2]  
f
Operating Clock  
Frequency in MHz  
30  
50  
MHz  
NOM  
[1, 2]  
FS = MID  
25  
FS = HIGH  
40  
110  
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
REF Pulse Width HIGH  
REF Pulse Width LOW  
Programmable Skew Unit  
5.0  
5.0  
ns  
ns  
RPWH  
RPWL  
U
Zero Output Matched-Pair Skew (XQ0, XQ1)  
0.1  
0.25  
0.6  
0.5  
0.5  
0.5  
0.25  
0.5  
0.7  
1.0  
0.7  
1.0  
1.25  
+0.5  
+1.0  
2.5  
3
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ms  
ps  
ps  
SKEWPR  
SKEW0  
SKEW1  
SKEW2  
SKEW3  
SKEW4  
DEV  
Zero Output Skew (All Outputs)  
Output Skew (Rise-Rise, Fall-Fall, Same Class Outputs)  
Output Skew (Rise-Fall, Nominal-Inverted, Divided-Divided)  
Output Skew (Rise-Rise, Fall-Fall, Different Class Outputs)  
Output Skew (Rise-Fall, Nominal-Divided, Divided-Inverted)  
Device-to-Device Skew  
Propagation Delay, REF Rise to FB Rise  
–0.5  
–1.0  
0.0  
0.0  
PD  
Output Duty Cycle Variation  
ODCV  
PWH  
Output HIGH Time Deviation from 50%  
Output LOW Time Deviation from 50%  
PWL  
Output Rise Time  
0.15  
0.15  
1.0  
1.0  
1.5  
1.5  
0.5  
25  
ORISE  
OFALL  
LOCK  
JR  
Output Fall Time  
PLL Lock Time  
Cycle-to-Cycle Output  
Jitter  
RMS  
[12]  
Peak-to-Peak  
200  
Document Number: 38-07408 Rev. *D  
Page 9 of 14  
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CY7B9911V  
3.3V RoboClock+™  
Switching Characteristics – 7 Option  
[2, 11]  
Over the Operating Range  
CY7B9911V-7  
Typ  
Parameter  
Description  
FS = LOW  
Unit  
Min  
15  
Max  
30  
[1, 2]  
f
Operating Clock  
MHz  
NOM  
Frequency in MHz  
[1, 2]  
FS = MID  
25  
50  
[1, 2 , 3]  
FS = HIGH  
40  
110  
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
REF Pulse Width HIGH  
REF Pulse Width LOW  
Programmable Skew Unit  
5.0  
5.0  
ns  
ns  
RPWH  
RPWL  
U
Zero Output Matched Pair Skew (XQ0, XQ1)  
0.1  
0.3  
0.6  
1.0  
0.7  
1.2  
0.25  
0.75  
1.0  
1.5  
1.2  
1.7  
1.65  
+0.7  
+1.2  
3
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ms  
ps  
ps  
SKEWPR  
SKEW0  
SKEW1  
SKEW2  
SKEW3  
SKEW4  
DEV  
Zero Output Skew (All Outputs)  
Output Skew (Rise-Rise, Fall-Fall, Same Class Outputs)  
Output Skew (Rise-Fall, Nominal-Inverted, Divided-Divided)  
Output Skew (Rise-Rise, Fall-Fall, Different Class Outputs)  
Output Skew (Rise-Fall, Nominal-Divided, Divided-Inverted)  
Device-to-Device Skew  
Propagation Delay, REF Rise to FB Rise  
–0.7  
–1.2  
0.0  
0.0  
PD  
Output Duty Cycle Variation  
ODCV  
PWH  
Output HIGH Time Deviation from 50%  
Output LOW Time Deviation from 50%  
3.5  
2.5  
2.5  
0.5  
25  
PWL  
Output Rise Time  
0.15  
0.15  
1.5  
1.5  
ORISE  
OFALL  
LOCK  
JR  
Output Fall Time  
PLL Lock Time  
Cycle-to-Cycle Output  
Jitter  
RMS  
Peak  
[12]  
100  
200  
Notes  
11. Test measurement levels for the CY7B9911V are TTL levels (1.5V to 1.5V). Test conditions assume signal transition times of 2 ns or less and output loading  
as shown in the AC Test Loads and Waveforms unless otherwise specified.  
12. Guaranteed by statistical correlation. Tested initially and after any design or process changes that may affect these parameters.  
13. SKEW is defined as the time between the earliest and the latest output transition among all outputs for which the same tU delay is selected when all are loaded  
with 30 pF and terminated with 50Ω to VCC/2 (CY7B9911V).  
14. tSKEWPR is defined as the skew between a pair of outputs (XQ0 and XQ1) when all eight outputs are selected for 0tU.  
15. tSKEW0 is defined as the skew between outputs when they are selected for 0tU. Other outputs are divided or inverted but not shifted.  
16. CL=0 pF. For CL=30 pF, tSKEW0=0.35 ns.  
17. There are three classes of outputs: Nominal (multiple of tU delay), Inverted (4Q0 and 4Q1 only with 4F0 = 4F1 = HIGH), and Divided (3Qx and 4Qx only in  
Divide-by-2 or Divide-by-4 mode).  
18. tDEV is the output-to-output skew between any two devices operating under the same conditions (VCC ambient temperature, air flow, and so on.)  
19. tODCV is the deviation of the output from a 50% duty cycle. Output pulse width variations are included in tSKEW2 and tSKEW4 specifications.  
20. Specified with outputs loaded with 30 pF for the CY7B9911V-5 and -7 devices. Devices are terminated through 50Ω to VCC/2.tPWH is measured at 2.0V. tPWL  
is measured at 0.8V.  
21. tORISE and tOFALL measured between 0.8V and 2.0V.  
22. tLOCK is the time that is required before synchronization is achieved. This specification is valid only after VCC is stable and within normal operating limits. This  
parameter is measured from the application of a new signal or frequency at REF or FB until tPD is within specified limits.  
Document Number: 38-07408 Rev. *D  
Page 10 of 14  
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CY7B9911V  
3.3V RoboClock+™  
AC Timing Diagrams  
t
t
RPWL  
REF  
t
RPWH  
REF  
t
t
ODCV  
PD  
t
ODCV  
FB  
Q
t
JR  
t
t
t
t
SKEWPR,  
SKEW0,1  
SKEWPR,  
SKEW0,1  
OTHERQ  
t
SKEW2  
t
SKEW2  
INVERTED Q  
t
SKEW3,4  
t
t
SKEW3,4  
t
SKEW3,4  
REF DIVIDED BY 2  
REF DIVIDED BY 4  
t
SKEW1,3, 4  
SKEW2,4  
Document Number: 38-07408 Rev. *D  
Page 11 of 14  
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CY7B9911V  
3.3V RoboClock+™  
Ordering Information  
Operating  
Range  
Accuracy (ps)  
Ordering Code  
Package Type  
32-Pb Plastic Leaded Chip Carrier  
500  
500  
CY7B9911V-5JC  
CY7B9911V-5JCT  
Commercial  
Commercial  
Commercial  
Commercial  
32-Pb Plastic Leaded Chip Carrier – Tape and Reel  
32-Pb Plastic Leaded Chip Carrier  
700  
CY7B9911V-7JC  
CY7B9911V-7JCT  
700  
32-Pb Plastic Leaded Chip Carrier – Tape and Reel  
Pb-Free  
500  
CY7B9911V-5JXC  
32-Pb Plastic Leaded Chip Carrier  
Commercial  
Commercial  
Commercial  
Commercial  
500  
CY7B9911V-5JXCT  
32-Pb Plastic Leaded Chip Carrier – Tape and Reel  
32-Pb Plastic Leaded Chip Carrier  
700  
CY7B9911V-7JXC  
CY7B9911V-7JXCT  
700  
32-Pb Plastic Leaded Chip Carrier – Tape and Reel  
Note  
23. Parts not recommended for the new design.  
Document Number: 38-07408 Rev. *D  
Page 12 of 14  
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CY7B9911V  
3.3V RoboClock+™  
Package Diagram  
Figure 10. 32-Pin Plastic Leaded Chip Carrier J65  
51-85002-*B  
Document Number: 38-07408 Rev. *D  
Page 13 of 14  
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CY7B9911V  
3.3V RoboClock+™  
Document History Page  
Document Title: CY7B9911V 3.3V RoboClock+™ High Speed Low Voltage Programmable Skew Clock Buffer  
Document Number: 38-07408  
Orig. of  
Change  
REV.  
ECN NO. Issue Date  
Description of Change  
**  
114350  
299713  
3/20/02  
DSG  
Change from Specification number: 38-00765 to 38-07408  
*A  
See ECN  
RGL  
Added Tape and Reel and Pb-free Devices in the Ordering Information table  
Added 100 ps typical value for jitter (peak)  
*B  
*C  
404630  
See ECN  
RGL  
Minor Change: Added a note in ordering table that Pb-free is in Pure Sn  
1199925  
See ECN KVM/AESA Added Note 23: Parts not recommended for the new design in Ordering  
Information table  
*D  
1286064  
See ECN  
AESA  
Change status to final  
© Cypress Semiconductor Corporation, 2002-2007. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of  
any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for  
medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as  
critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems  
application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.  
Any Source Code (software and/or firmware) is owned by Cypress Semiconductor Corporation (Cypress) and is protected by and subject to worldwide patent protection (United States and foreign),  
United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of,  
and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress  
integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code except as specified above is prohibited without  
the express written permission of Cypress.  
Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES  
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not  
assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems where  
a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer  
assumes all risk of such use and in doing so indemnifies Cypress against all charges.  
Use may be limited by and subject to the applicable Cypress software license agreement.  
Document Number: 38-07408 Rev. *D  
Revised June 20, 2007  
Page 14 of 14  
PSoC Designer™, Programmable System-on-Chip™, and PSoC Express™ are trademarks and PSoC® is a registered trademark of Cypress Semiconductor Corp. All other trademarks or registered  
2
trademarks referenced herein are property of the respective corporations. Purchase of I C components from Cypress or one of its sublicensed Associated Companies conveys a license under the  
2
2
2
Philips I C Patent Rights to use these components in an I C system, provided that the system conforms to the I C Standard Specification as defined by Philips. RoboClock+ is a trademark of Cypress  
Semiconductor Corporation. All products and company names mentioned in this document may be the trademarks of their respective holders.  
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