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INTEGRATED CIRCUITS
CBT6800
10-bit bus switch with precharged outputs
for live insertion
Product data
Supersedes data of 1999 Oct 28
Philips
Semiconductors
2003 Sep 12
Page 2
Philips Semiconductors Product data
10-bit bus switch with precharged outputs
for live insertion
FEATURES
• 5 Ω switch connection between two ports
• TTL compatible input and output levels
• Outputs are precharged by bias voltage to minimize signal
distortion during live insertion
• Latch-up protection exceeds 100 mA per JESD78
• ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
QUICK REFERENCE DATA
SYMBOL PARAMETER
C
t
PLH
t
PHL
C
OUT
I
CCZ
IN
Propagation delay
An to Bn or Bn to An
Input capacitance - control pin VI = 0 V or V
Output capacitance - I/O pins Outputs disabled; VO = 0 V or V
Total supply current Outputs disabled; VCC =5.5 V 1 µA
CL = 50 pF; VCC = 5 V 250 ps
T
CC
amb
CBT6800
DESCRIPTION
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.
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
and port B is open and the B port is precharged to BIASV through
the equivalent of a 10 kΩ resistor.
The CBT6800 is characterized for operation from -40 to 85 °C.
CONDITIONS
= 25 °C; GND = 0 V
CC
is high, the switch between port A
TYPICAL UNIT
3.5 pF
8.2 pF
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE ORDER CODE DWG NUMBER
24-Pin Plastic TSSOP -40 to +85 °C CBT6800PW SOT355-1
PIN CONFIGURATION
OE
1
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
A8
10
A9
11
A10
12
GND
24
Vcc
23
B1
22
B2
21
B3
20
B4
19
B5
18
B6
17
B7
16
B8
15
B9
14
B10
13
BIASV
PIN DESCRIPTION
PIN NUMBER SYMBOL NAME AND FUNCTION
1 OE Output enable
13 BIASV Precharge bias voltage input
2, 3, 4, 5, 6,
7, 8, 9, 10, 11
23, 22, 21, 20, 19,
18, 17, 16, 15, 14
12 GND Ground (V)
24 V
A1-A10 A-port I/O pins
B1-B10 B-port I/O pins - with active pullup
Positive supply voltage
CC
2003 Sep 12
SA00505
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Philips Semiconductors Product data
10-bit bus switch with precharged outputs
for live insertion
LOGIC SYMBOL
13
BIASV
A1
A10
OE
B1
B10
SA00536
CBT6800
FUNCTION TABLE
OE B1 - B10 FUNCTION
L A1 - A10 Connect
H BIASV Precharge
H = HIGH voltage level
L = LOW voltage level
Z = HIGH impedance “off” state
ABSOLUTE MAXIMUM RATINGS
SYMBOL
V
CC
I
IK
V
I
I
SW
T
stg
DC supply voltage -0.5 to +7.0 V
DC input diode current -50 mA
DC input voltage
DC clamp diode current VO < 0 -50 mA
Storage temperature range -65 to 150 °C
PARAMETER CONDITIONS RATING UNIT
3
1, 2
-1.2 to +7.0 V
BiasV DC voltage range -0.5 to 6.0 V
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
SYMBOL PARAMETER
V
CC
DC supply voltage 4.5 5.5 V
BIASV DC supply voltage 1.3 V
T
V
V
amb
HIGH-level input voltage 2.0 — V
IH
LOW-level Input voltage — 0.8 V
IL
Operating free-air temperature range -40 +85 °C
LIMITS
Min Max
CC
UNIT
V
2003 Sep 12
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Philips Semiconductors Product data
10-bit bus switch with precharged outputs
CBT6800
for live insertion
DC ELECTRICAL CHARACTERISTICS
LIMITS
T
SYMBOL PARAMETER TEST CONDITIONS
V
I
∆I
C
O(OFF)
Input clamp voltage VCC = 4.5 V; II = -18 mA — — -1.2 V
IK
I
Input leakage current - OE VCC = 5.5 V; VI = GND or 5.5 V — — ±5 µA
I
I
Output bias current VCC = 4.5 V; BiasV = 2.4 V; VO = 0 0.25 — — mA
O
Quiescent supply current VCC = 5.5 V; IO = 0, VI = VCC or GND — — 50 µA
CC
Control pins
CC
C
Control pins VI= 3 V or 0 — 3.5 — pF
I
2
VCC = 5.5 V, one input at 3.4 V, other inputs at VCC or GND — — 2.5 mA
Off-state capacitance - I/O pins VO = 3 V or 0; switch off — 8.2 — pF
VCC = 4.5 V; VI = 0 V; II = 64 mA — 5 7
3
r
on
on
On-resistance
VCC = 4.5 V; VI = 0 V; II = 30 mA — 5 7
VCC = 4.5 V; VI = 2.4 V; II = 15 mA — 10 15
VP Pass gate voltage VIN = VCC = 5.0 V, I
= -100 µA 3.4 3.6 3.9 V
OUT
NOTES:
1. All typical values are at V
2. This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND
= 5 V, T
CC
amb
= 25 °C
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.
= -40 to +85 °C
amb
Min Typ
1
Max
UNIT
Ω
2003 Sep 12
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Philips Semiconductors Product data
10-bit bus switch with precharged outputs
CBT6800
for live insertion
AC CHARACTERISTICS
GND = 0 V; CL = 50 pF; tr = tf ≤ 2.5 ns
SYMBOL PARAMETER
1
t
T
t
T
t
pd
PZH
PZL
PHZ
PLZ
Propagation delay
BIASV = GND
BIASV = 3 V
BIASV = GND
BIASV = 3 V
FROM TO
(INPUT) (OUTPUT)
A or B B or A — .25 ns
ON A or B
ON A or B
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
VM = 1.5 V, VIN = GND to 3.0 V
INPUT
1.5V
3 V
1.5V
0 V
t
PLH
t
PHL
V
OH
From Output
Under Test
C
L
= 50 pF
LIMITS
VCC = +5.0 V ±0.5 V
Min Max
2.4
3.0
1.0
3.1
500 Ω
500 Ω
Load Circuit
7.7
8.3
5.3
7.8
S1
UNIT
ns
ns
7 V
Open
GND
1.5V 1.5V
OUTPUT
V
SA00028
OL
Waveform 1. W aveforms Showing the Input (An) to Output (Yn)
Propagation Delays
+ 0.3V
- 0.3V
SA00029
3V
0V
3.5V
V
OL
V
OH
0V
Output Control
(Low-level
enabling
Output
Waveform 1
S1 at 7 V
(see Note)
Output
Waveform 2
S1 at Open
(see Note)
1.5 V 1.5 V
t
PZL
1.5 V
t
PZH
1.5 V
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.
t
t
PHZ
PLZ
V
OL
V
OH
Waveform 2. W aveforms Showing the 3-State Output Enable
and Disable Times
TEST S1
t
pd
t
PLZ/tPZL
t
PHZ/tPZH
DEFINITIONS
= Load capacitance includes jig and probe capacitance;
C
L
see AC CHARACTERISTICS for value.
open
7 V
open
SA00012
NOTES:
1. All input pulses are supplied by generators having the following
characteristics: PRR ≤ 10 MHz, Z
2. The outputs are measured one at a time with one transition per
= 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
O
measurement.
2003 Sep 12
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Philips Semiconductors Product data
10-bit bus switch with precharged outputs
CBT6800
for live insertion
TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm SOT355-1
2003 Sep 12
6
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Philips Semiconductors Product data
10-bit bus switch with precharged outputs
CBT6800
for live insertion
REVISION HISTORY
Rev
_2 20030912 Product data (9397 750 12059); ECN 853-2182 30126 dated 18 July 2003.
_1 19991028 Product data (9397 750 06552); ECN: 853-2182 22598 of 28 October 1999
Date Description
Supersedes data of 28 October 1999 (9397 750 06552).
Modifications:
• Corrections to block diagram drawing
2003 Sep 12
7
Page 8
Philips Semiconductors Product data
10-bit bus switch with precharged outputs
CBT6800
for live insertion
Data sheet status
Product
Level
I
II
III
[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.
Data sheet status
Objective data
Preliminary data
Product data
http://www.semiconductors.philips.com.
[1]
[2] [3]
status
Development
Qualification
Production
Definitions
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.
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.
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).
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.
Contact information
For additional information please visit
http://www.semiconductors.philips.com. Fax: +31 40 27 24825
For sales offices addresses send e-mail to:
sales.addresses@www.semiconductors.philips.com.
Document order number: 9397 750 12059
Koninklijke Philips Electronics N.V. 2003
All rights reserved. Printed in U.S.A.
Date of release: 09-03
Philips
Semiconductors
2003 Sep 12
8
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