CBT6810
10-bit bus switch with precharged outputs
and Schottky undershoot protection for
live insertion
Product specification
Supersedes data of 1999 Apr 05 2000 Jun 19
INTEGRATED CIRCUITS
Philips Semiconductors Product specification
CBT6810
10-bit bus switch with precharged outputs
and Schottky undershoot protection for live insertion
2
2000 Jun 19 853–2151 23905
FEATURES
•5Ω switch connection between port A and port B
•TTL compatible input and output levels
•Undershoot protection included to prevent shoot through level
changes
•Bias voltage pre-charges the outputs to minimize signal distortion
during live insertion
•Latch-up protection exceeds 500 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
DESCRIPTION
The CBT6810 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 CBT6810 is organized as one 10-bit switch with a single enable
(OE) input. When OE is low, the switch is on and port A is
connected to port B. When OE 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.
The CBT6810 is characterized for operation from –40°C to +85°C.
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS
Tamb = 25°C; GND = 0V TYPICAL UNIT
tPLH
tPHL Propagation delay
An to Bn or Bn to An CL = 50pF; VCC = 5V 250 ps
CIN Input capacitance VI = 0V or VCC 3.5 pF
CIO Input/output capacitance Outputs disabled; VO = 0V or VCC 9.0 pF
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE ORDER CODE DWG NUMBER
24-Pin Plastic TSSOP Type I –40°C to +85°CCBT6810 PW DH SOT355–1
PIN CONFIGURATION
SA00505
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
GND
OE Vcc
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
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 A1–A10 A - port side
23, 22, 21, 20, 19,
18, 17, 16, 15, 14 B1–B10 B - port side with active pullup
12 GND Ground (V)
24 VCC Positive supply voltage
Philips Semiconductors Product specification
CBT6810
10-bit bus switch with precharged outputs
and Schottky undershoot protection for live insertion
2000 Jun 19 3
LOGIC SYMBOL
BIASV
A1
A10
CE
B1
B10
SA00531
FUNCTION TABLE
OE STATE
LA port = B port
HA port = Z
HB port = BIASV
H = High voltage level
L = Low voltage level
Z = High impedance “of f” state
ABSOLUTE MAXIMUM RATINGS1, 2
SYMBOL PARAMETER CONDITIONS RATING UNIT
VCC DC supply voltage –0.5 to +7.0 V
IIK DC clamp diode current –50 mA
VIDC input voltage3–0.5 to +7.0 V
ISW DC continuous channel current ±128 mA
Tstg Storage temperature range –65 to 150 °C
BIASV DC Bias voltage range –0.5 to 7.0 V
ΘJA Power dissipation per package
Plastic thin shrink small outline package 134 °C/W
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.
Philips Semiconductors Product specification
CBT6810
10-bit bus switch with precharged outputs
and Schottky undershoot protection for live insertion
2000 Jun 19 4
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
UNIT
SYMBOL
PARAMETER
Min Max
UNIT
VCC DC supply voltage 4.0 5.5 V
BIASV DC supply voltage 1.3 VCC V
VIH High-level input voltage (control pin) 2.0 V
VIL Low-level Input voltage (control pin) 0.8 V
Tamb Operating free-air temperature range –40 +85 °C
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL PARAMETER TEST CONDITIONS Tamb = –40°C to +85°C UNIT
Min Typ1Max
VIK Input clamp voltage VCC = 4.5 V ; II = –18mA –1.2 V
IIInput leakage current (control pin) VCC = 5.5 V ; VI = GND or 5.5V ±5µA
IOOutput bias current (B pins) VCC = 4.5 V ; BiasV = 2.4 V; VO = 0, OE =
VCC –0.25 mA
ICC Quiescent supply current VCC = 5.5 V ; IO = 0, VI = VCC or GND 2.5 mA
∆ICC Control pins2VCC = 5.5 V, one input at 3.4V,
other inputs at VCC or GND 2.5 mA
CIControl pins VI= 3 V or 0 3.5 pF
CO(OFF) Terminal capacitance VO = 3 V or 0; switch off 9.0 pF
3
VCC = 4.5 V ; VI = 0 V; II = 64 mA 5 7
ron
3
On-resistance VCC = 4.5 V ; VI = 0 V; II = 30 mA 5 7 Ω
VCC = 4.5 V ; VI = 2.4 V; II = –15 mA 10 15
VPPass voltage VIN = VCC = 5.0 V ; Iout = –100 µA 3.4 3.6 3.9 V
IUSP4Undershoot static current
protection VCC = 5.0 V, BiasV = VCC
IB = –5 µA, VB ≥3 V –10 mA
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.
4. Force IUSP, measure VB ≥ 3 V
Philips Semiconductors Product specification
CBT6810
10-bit bus switch with precharged outputs
and Schottky undershoot protection for live insertion
2000 Jun 19 5
AC CHARACTERISTICS FOR VCC = 5.0V ±0.5V RANGE
GND = 0V ; tr = tf ≤ 2.5ns; C L = 50pF. LIMITS
SYMBOL PARAMETER WAVEFORM Tamb = –40 to +85°CUNIT
MIN TYP1MAX
tpd Propagation delay An to Bn; Bn to An21 0.25 ns
tPZH 3-State output enable time
OE to An; OE to Bn; BIASV = GND 2 1.8 3.5 5.3 ns
tPZL 3-State output enable time
OE to An; OE to Bn; BIASV = 3.0V 2 2.1 4.2 7.2 ns
tPHZ 3-State output enable time
OE to An; OE to Bn; BIASV = GND 2 1.7 3.7 6.1 ns
tPLZ 3-State output enable time
OE to An; OE to Bn; BIASV = 3.0V 2 1.0 5.5 7.3 ns
NOTE:
1. All typical values are measured at Tamb = 25°C and VCC = 5.0V
2. W arranted 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 50pF, when driven by an ideal voltage source (zero output impedance)
AC WAVEFORMS
VM = 1.5V, VIN = GND to 3.0V
INPUT 1.5V
OUTPUT
tPLH tPHL
SA00028
1.5V
1.5V 1.5V
3 V
0 V
VOH
VOL
W aveform 1. Waveforms Showing the Input (An) to Output (Yn)
Propagation Delays
Output Control
(Low-level
enabling
1.5 V
tPZH tPHZ VOH
VOL
tPZL tPLZ 3.5V
0V
VOL + 0.3V
VOH – 0.3V
SA00029
1.5 V
1.5 V 1.5 V
0V
3V
Output
Waveform 1
S1 at 7 V
(see Note)
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.
Output
Waveform 2
S1 at Open
(see Note)
W aveform 2. Waveforms Showing the 3-State Output Enable
and Disable Times
TEST CIRCUIT AND WAVEFORMS
CL = 50 pF 500 Ω
Load Circuit
DEFINITIONS
CL = Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.
TEST S1
tpd open
tPLZ/tPZL 7 V
tPHZ/tPZH open
SA00012
500 Ω
From Output
Under Test
S1 7 V
Open
GND
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.
Philips Semiconductors Product specification
CBT6810
10-bit bus switch with precharged outputs
and Schottky undershoot protection for live insertion
2000 Jun 19 6
TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm SOT355-1
Philips Semiconductors Product specification
CBT6810
10-bit bus switch with precharged outputs
and Schottky undershoot protection for live insertion
2000 Jun 19 7
NOTES
Philips Semiconductors Product specification
CBT6810
10-bit bus switch with precharged outputs
and Schottky undershoot protection for live insertion
2000 Jun 19 8
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 134). 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 af fect 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, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. 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.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
Copyright Philips Electronics North America Corporation 2000
All rights reserved. Printed in U.S.A.
print code Date of release: 06-00
Document order number: 9397 750 07214
Data sheet
status
Objective
specification
Preliminary
specification
Product
specification
Product
status
Development
Qualification
Production
Definition [1]
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make changes at any time without notice in order to
improve design and supply the best possible product.
This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.
Data sheet status
[1] Please consult the most recently issued datasheet before initiating or completing a design.
