INTEGRATED CIRCUITS
CBT6800
10-bit bus switch with precharged outputs
for live insertion
Product data
2003 Sep 12
Supersedes data of 1999 Oct 28
Philips
Semiconductors
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Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
CBT6800
FEATURES
DESCRIPTION
• 5 Ω switch connection between two ports
• TTL compatible input and output levels
The CBT6800 provides ten bits of high-speed TTL-compatible bus
switching. The low on-state resistance of the switch allows
bi-directional connections to be made while adding near-zero
propagation delay. The device also precharges the B port to a
user-selectable bias voltage (BIASV) to minimize live-insertion noise.
• Outputs are precharged by bias voltage to minimize signal
distortion during live insertion
• Latch-up protection exceeds 100 mA per JESD78
The CBT6800 is organized as one 10-bit switch with a single enable
(ON) input. When ON is low, the switch is on and port A is
connected to port B. When ON is high, the switch between port A
and port B is open and the B port is precharged to BIASV through
the equivalent of a 10 kΩ resistor.
• ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
The CBT6800 is characterized for operation from -40 to 85 °C.
QUICK REFERENCE DATA
CONDITIONS
= 25 °C; GND = 0 V
SYMBOL
PARAMETER
TYPICAL
UNIT
T
amb
t
t
Propagation delay
An to Bn or Bn to An
PLH
PHL
C = 50 pF; V = 5 V
250
ps
L
CC
C
Input capacitance - control pin
Output capacitance - I/O pins
Total supply current
V = 0 V or V
CC
3.5
8.2
1
pF
pF
µA
IN
I
C
I
Outputs disabled; V = 0 V or V
OUT
O
CC
Outputs disabled; V =5.5 V
CCZ
CC
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
ORDER CODE
DWG NUMBER
24-Pin Plastic TSSOP
-40 to +85 °C
CBT6800PW
SOT355-1
PIN CONFIGURATION
PIN DESCRIPTION
PIN NUMBER
SYMBOL
OE
NAME AND FUNCTION
1
Output enable
13
BIASV
Precharge bias voltage input
A-port I/O pins
OE
A1
1
2
24
23
Vcc
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
2, 3, 4, 5, 6,
7, 8, 9, 10, 11
A1-A10
23, 22, 21, 20, 19,
18, 17, 16, 15, 14
3
A2
A3
22
21
20
19
B1-B10
GND
B-port I/O pins - with active pullup
4
12
24
Ground (V)
5
A4
V
CC
Positive supply voltage
6
A5
7
18
17
16
15
14
A6
8
A7
9
A8
10
11
12
A9
A10
GND
13 BIASV
SA00505
2
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Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
CBT6800
LOGIC SYMBOL
FUNCTION TABLE
OE
L
B1 - B10
A1 - A10
BIASV
FUNCTION
13
BIASV
Connect
H
Precharge
H
L
Z
= HIGH voltage level
B1
A1
=
=
LOW voltage level
HIGH impedance “off” state
B10
A10
OE
SA00536
1, 2
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
DC supply voltage
CONDITIONS
RATING
-0.5 to +7.0
-50
UNIT
V
V
CC
I
IK
DC input diode current
mA
V
3
V
I
DC input voltage
-1.2 to +7.0
-50
I
DC clamp diode current
Storage temperature range
DC voltage range
V
O
< 0
mA
°C
V
SW
T
stg
-65 to 150
-0.5 to 6.0
BiasV
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150 °C.
3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
PARAMETER
UNIT
Min
4.5
1.3
2.0
—
Max
V
CC
DC supply voltage
5.5
V
V
BIASV
DC supply voltage
V
CC
V
IH
HIGH-level input voltage
LOW-level Input voltage
—
V
V
IL
0.8
+85
V
T
amb
Operating free-air temperature range
-40
°C
3
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Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
CBT6800
DC ELECTRICAL CHARACTERISTICS
LIMITS
T
amb
= -40 to +85 °C
SYMBOL
PARAMETER
TEST CONDITIONS
UNIT
1
Min
—
Typ
—
—
—
—
—
3.5
8.2
5
Max
-1.2
5
V
Input clamp voltage
V
V
V
V
V
= 4.5 V; I = -18 mA
V
IK
CC
CC
CC
CC
CC
I
I
Input leakage current - OE
Output bias current
= 5.5 V; V = GND or 5.5 V
—
µA
mA
µA
mA
pF
pF
I
I
I
O
= 4.5 V; BiasV = 2.4 V; V = 0
0.25
—
—
O
I
Quiescent supply current
= 5.5 V; I = 0, V = V or GND
50
2.5
—
CC
O
I
CC
2
∆I
CC
Control pins
= 5.5 V, one input at 3.4 V, other inputs at V or GND
—
CC
C
Control pins
V = 3 V or 0
I
—
I
C
Off-state capacitance - I/O pins
V
V
V
V
V
= 3 V or 0; switch off
—
—
O(OFF)
O
= 4.5 V; V = 0 V; I = 64 mA
—
7
CC
CC
CC
I
I
3
r
= 4.5 V; V = 0 V; I = 30 mA
—
5
7
On-resistance
Ω
I
I
on
= 4.5 V; V = 2.4 V; I = 15 mA
—
10
3.6
15
3.9
I
I
VP
Pass gate voltage
= V = 5.0 V, I = -100 µA
OUT
3.4
V
IN
CC
NOTES:
1. All typical values are at V = 5 V, T
2. This is the increase in supply current for each input that is at the specified TTL voltage level rather than V or GND
= 25 °C
amb
CC
CC
3. Measured by the voltage drop between the A and the B terminals at the indicated current through the switch. On-state resistance is
determined by the lowest voltage of the two (A or B) terminals.
4
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Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
CBT6800
AC CHARACTERISTICS
GND = 0 V; C = 50 pF; t = t ≤ 2.5 ns
L
r
f
LIMITS
= +5.0 V 0.5 V
FROM
(INPUT)
TO
(OUTPUT)
V
CC
SYMBOL
PARAMETER
UNIT
Min
Max
1
t
Propagation delay
A or B
ON
B or A
A or B
—
.25
ns
ns
pd
t
BIASV = GND
BIASV = 3 V
2.4
3.0
7.7
8.3
PZH
T
PZL
t
T
BIASV = GND
BIASV = 3 V
1.0
3.1
5.3
7.8
PHZ
PLZ
ON
A or B
ns
NOTE:
1. This parameter is warranted but not production tested. The propagation delay is based on the RC time constant of the typical on-state
resistance of the switch and a load capacitance of 50 pF, when driven by an ideal voltage source (zero output impedance).
AC WAVEFORMS
TEST CIRCUIT AND WAVEFORMS
V
= 1.5 V, V = GND to 3.0 V
M
IN
7 V
3 V
0 V
500 Ω
S1
From Output
Under Test
Open
GND
1.5V
1.5V
INPUT
500 Ω
C
= 50 pF
L
t
t
PHL
PLH
Load Circuit
V
V
OH
1.5V
1.5V
TEST
S1
OUTPUT
t
pd
open
7 V
OL
t
/t
PLZ PZL
SA00028
t
/t
open
PHZ PZH
Waveform 1. Waveforms Showing the Input (An) to Output (Yn)
Propagation Delays
DEFINITIONS
C
=
Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.
L
3V
Output Control
SA00012
(Low-level
enabling
1.5 V
1.5 V
NOTES:
1. All input pulses are supplied by generators having the following
0V
t
t
PLZ
PZL
characteristics: PRR ≤ 10 MHz, Z = 50 Ω, t ≤ 2.5 ns, t ≤ 2.5 ns.
O
r
f
3.5V
2. The outputs are measured one at a time with one transition per
Output
Waveform 1
S1 at 7 V
measurement.
1.5 V
1.5 V
V
V
+ 0.3V
- 0.3V
OL
(see Note)
V
V
OL
t
t
PHZ
PZH
OH
Output
Waveform 2
S1 at Open
(see Note)
OH
0V
Note:
Waveform 1 is for an output with internal conditions such that
the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that
the output is high except when disabled by the output control.
SA00029
Waveform 2. Waveforms Showing the 3-State Output Enable
and Disable Times
5
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Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
CBT6800
TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm
SOT355-1
6
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Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
CBT6800
REVISION HISTORY
Rev
Date
Description
_2
20030912
Product data (9397 750 12059); ECN 853-2182 30126 dated 18 July 2003.
Supersedes data of 28 October 1999 (9397 750 06552).
Modifications:
• Corrections to block diagram drawing
_1
19991028
Product data (9397 750 06552); ECN: 853-2182 22598 of 28 October 1999
7
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Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
CBT6800
Data sheet status
Product
status
Definitions
[1]
Level
Data sheet status
[2] [3]
I
Objective data
Development
This data sheet contains data from the objective specification for product development.
Philips Semiconductors reserves the right to change the specification in any manner without notice.
II
Preliminary data
Product data
Qualification
Production
This data sheet contains data from the preliminary specification. Supplementary data will be published
at a later date. Philips Semiconductors reserves the right to change the specification without notice, in
order to improve the design and supply the best possible product.
III
This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply. Relevant
changes will be communicated via a Customer Product/Process Change Notification (CPCN).
[1] Please consult the most recently issued data sheet before initiating or completing a design.
[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL
[3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see
the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting
values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given
in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no
representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be
expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree
to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes in the products—including circuits, standard cells, and/or software—described
or contained herein in order to improve design and/or performance. When the product is in full production (status ‘Production’), relevant changes will be communicated
via a Customer Product/Process Change Notification (CPCN). Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys
no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent,
copyright, or mask work right infringement, unless otherwise specified.
Koninklijke Philips Electronics N.V. 2003
Contact information
All rights reserved. Printed in U.S.A.
For additional information please visit
Fax: +31 40 27 24825
Date of release: 09-03
For sales offices addresses send e-mail to:
Document order number:
9397 750 12059
Philips
Semiconductors
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