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
Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
FEATURES
CBT6800
DESCRIPTION
• 5 Ω switch connection between two ports
• TTL compatible input and output levels
• Outputs are precharged by bias voltage to minimize signal
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.
distortion during live insertion
• Latch-up protection exceeds 100 mA per JESD78
• ESD protection exceeds 2000 V HBM per JESD22-A114,
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.
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
SYMBOL
CONDITIONS
Tamb = 25 °C; GND = 0 V
PARAMETER
TYPICAL
UNIT
tPLH
tPHL
Propagation delay
An to Bn or Bn to An
CL = 50 pF; VCC = 5 V
250
ps
pF
CIN
Input capacitance - control pin
VI = 0 V or VCC
3.5
COUT
Output capacitance - I/O pins
Outputs disabled; VO = 0 V or VCC
8.2
pF
ICCZ
Total supply current
Outputs disabled; VCC =5.5 V
1
µA
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
ORDER CODE
DWG NUMBER
-40 to +85 °C
CBT6800PW
SOT355-1
24-Pin Plastic TSSOP
PIN CONFIGURATION
OE
PIN DESCRIPTION
1
24
Vcc
A1
2
23
B1
A2
3
22
B2
A3
4
21
B3
A4
5
20
B4
A5
6
19
B5
A6
7
18
B6
A7
8
17
B7
A8
9
16
B8
A9
10
15
B9
A10
11
14
B10
GND
12
13
BIASV
SA00505
2003 Sep 12
2
PIN NUMBER
SYMBOL
1
OE
NAME AND FUNCTION
13
BIASV
2, 3, 4, 5, 6,
7, 8, 9, 10, 11
A1-A10
A-port I/O pins
23, 22, 21, 20, 19,
18, 17, 16, 15, 14
B1-B10
B-port I/O pins - with active pullup
12
GND
Ground (V)
24
VCC
Positive supply voltage
Output enable
Precharge bias voltage input
Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
LOGIC SYMBOL
CBT6800
FUNCTION TABLE
13
OE
B1 - B10
L
A1 - A10
Connect
H
BIASV
Precharge
BIASV
H = HIGH voltage level
L = LOW voltage level
Z = HIGH impedance “off” state
B1
A1
FUNCTION
B10
A10
OE
SA00536
ABSOLUTE MAXIMUM RATINGS1, 2
SYMBOL
VCC
PARAMETER
RATING
DC supply voltage
IIK
DC input diode current
VI
DC input voltage3
UNIT
-0.5 to +7.0
V
-50
mA
-1.2 to +7.0
V
-50
mA
Storage temperature range
-65 to 150
°C
DC voltage range
-0.5 to 6.0
V
ISW
DC clamp diode current
Tstg
BiasV
CONDITIONS
VO < 0
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
LIMITS
PARAMETER
Min
Max
UNIT
VCC
DC supply voltage
4.5
5.5
V
BIASV
DC supply voltage
1.3
VCC
V
VIH
HIGH-level input voltage
2.0
—
V
VIL
LOW-level Input voltage
Tamb
2003 Sep 12
Operating free-air temperature range
3
—
0.8
V
-40
+85
°C
Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
CBT6800
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
VIK
PARAMETER
TEST CONDITIONS
Input clamp voltage
VCC = 4.5 V; II = -18 mA
-1.2
µA
—
mA
VCC = 5.5 V; IO = 0, VI = VCC or GND
—
—
50
µA
Quiescent supply current
VCC = 5.5 V, one input at 3.4 V, other inputs at VCC or GND
—
—
2.5
mA
Control pins
VI= 3 V or 0
—
3.5
—
pF
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
VCC = 4.5 V; VI = 0 V; II = 30 mA
—
5
7
ron3
On-resistance
VP
Pass gate voltage
VCC = 4.5 V; VI = 2.4 V; II = 15 mA
—
10
15
VIN = VCC = 5.0 V, IOUT = -100 µA
3.4
3.6
3.9
NOTES:
1. All typical values are at VCC = 5 V, Tamb = 25 °C
2. This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND
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.
2003 Sep 12
V
±5
ICC
CO(OFF)
—
—
VCC = 4.5 V; BiasV = 2.4 V; VO = 0
Control
—
UNIT
—
VCC = 5.5 V; VI = GND or 5.5 V
Output bias current
CI
Max
—
Input leakage current - OE
∆ICC
Typ1
0.25
II
IO
pins2
Tamb = -40 to +85 °C
Min
4
Ω
V
Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
CBT6800
AC CHARACTERISTICS
GND = 0 V; CL = 50 pF; tr = tf ≤ 2.5 ns
LIMITS
SYMBOL
FROM
(INPUT)
PARAMETER
Propagation delay1
tpd
A or B
TO
(OUTPUT)
VCC = +5.0 V ±0.5 V
UNIT
Min
Max
B or A
—
.25
ns
7.7
8.3
ns
5.3
7.8
ns
tPZH
TPZL
BIASV = GND
BIASV = 3 V
ON
A or B
2.4
3.0
tPHZ
TPLZ
BIASV = GND
BIASV = 3 V
ON
A or B
1.0
3.1
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
7V
3V
1.5V
1.5V
S1
Open
GND
INPUT
500 Ω
CL = 50 pF
0V
tPLH
500 Ω
From Output
Under Test
tPHL
Load Circuit
VOH
1.5V
1.5V
OUTPUT
VOL
SA00028
Waveform 1. Waveforms Showing the Input (An) to Output (Yn)
Propagation Delays
TEST
S1
tpd
open
tPLZ/tPZL
7V
tPHZ/tPZH
open
DEFINITIONS
Load capacitance includes jig and probe capacitance;
CL =
see AC CHARACTERISTICS for value.
3V
Output Control
(Low-level
enabling
SA00012
1.5 V
1.5 V
0V
tPLZ
tPZL
NOTES:
1. All input pulses are supplied by generators having the following
characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
2. The outputs are measured one at a time with one transition per
measurement.
3.5V
Output
Waveform 1
S1 at 7 V
(see Note)
1.5 V
VOL
tPHZ
tPZH
Output
Waveform 2
S1 at Open
(see Note)
VOL + 0.3V
VOH
VOH - 0.3V
1.5 V
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
2003 Sep 12
5
Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm
2003 Sep 12
6
CBT6800
SOT355-1
Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
REVISION HISTORY
Rev
Date
CBT6800
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
2003 Sep 12
7
Philips Semiconductors
Product data
10-bit bus switch with precharged outputs
for live insertion
CBT6800
Data sheet status
Level
Data sheet status[1]
Product
status[2] [3]
Definitions
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
Qualification
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
Product data
Production
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
http://www.semiconductors.philips.com.
[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
All rights reserved. Printed in U.S.A.
Contact information
For additional information please visit
http://www.semiconductors.philips.com.
Fax: +31 40 27 24825
Date of release: 09-03
For sales offices addresses send e-mail to:
sales.addresses@www.semiconductors.philips.com.
Document order number:
Philips
Semiconductors
2003 Sep 12
8
9397 750 12059
