Datasheet CBT6810 Datasheet (Philips)

INTEGRATED CIRCUITS

CBT6810

10-bit bus switch with precharged outputs
and Schottky undershoot protection for
live insertion

Product specification




1999 Apr 05

Philips Semiconductors Product specification

10-bit bus switch with precharged outputs
and Schottky undershoot protection for live insertion

FEA TURES

•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

QUICK REFERENCE DATA

SYMBOL PARAMETER

t

PLH

t

PHL

C
C

IN

IO

Propagation delay
An to Bn or Bn to An

CL = 50pF; VCC = 5V 250 ps

Input capacitance VI = 0V or V
Input/output capacitance Outputs disabled; VO = 0V or V

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
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 0°C to 85°C.

CONDITIONS

T

= 25°C; GND = 0V

amb

CC

CC

CBT6810

is high, the switch between port A

TYPICAL UNIT

3.5 pF

9.0 pF

ORDERING INFORMATION

PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER

24-Pin Plastic TSSOP Type I –40°C to +85°C CBT6810 PW CBT6810PW DH 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

BIASV

13

PIN DESCRIPTION

PIN NUMBER SYMBOL NAME AND FUNCTION

1 OE Output enable

13 BIASV Bias supply pin

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 side

B1–B10 B - port side with active pullup

Positive supply voltage

CC

SA00505

1999 Apr 05 853–2151 21177

2

Philips Semiconductors Product specification

10-bit bus switch with precharged outputs
and Schottky undershoot protection for live insertion

LOGIC SYMBOL

A1

A10

CE

BIASV

B1

B10

FUNCTION TABLE

H = High voltage level
L = Low voltage level
Z = High impedance “off” state

CBT6810

OE STATE

L A port = B port
H A port = Z
H B port = BIASV

SA00531

ABSOLUTE MAXIMUM RATINGS

SYMBOL

V

CC

I

IK

V

I

SW

T

stg

BIASV DC Bias voltage range –0.5 to 7.0 V

øJA

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 ju nction
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.

DC supply voltage –0.5 to +7.0 V
DC clamp diode current –50 mA
DC input voltage

I

DC continuous channel current ± 128 mA
Storage temperature range –65 to 150 °C

Power dissipation per package
Plastic thin shrink small outline package

PARAMETER CONDITIONS RATING UNIT

3

1, 2

–0.5 to +7.0 V

134 °C/W

1999 Apr 05

3

Philips Semiconductors Product specification

SYMBOL

PARAMETER

UNIT

3

10-bit bus switch with precharged outputs

CBT6810

and Schottky undershoot protection for live insertion

RECOMMENDED OPERATING CONDITIONS

LIMITS

Min Max

V

CC

BIASV DC supply voltage 1.3 V

V
V

T

amb

DC ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER TEST CONDITIONS T

V

I

I

O

I

CC

∆I

CC

C

C

O(OFF)

r

on

V

I

USP

NOTES:

1. All typical values are at VCC = 5V, TA = 25 C

2. This is the increase in supply current for each input that is at the specified TTL voltage level rather than V

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 I

DC supply voltage 4.0 5.5 V

CC

High-level input voltage (control pin) 2.0 V

IH

Low-level Input voltage (control pin) 0.8 V

IL

Operating free-air temperature range –40 +85 °C

LIMITS

= –40°C to +85°C UNIT

amb

Min Typ

Input clamp voltage VCC = 4.5V; II = –18mA –1.2 V

IK

Input leakage current (control pin) VCC = 5.5V; VI = GND or 5.5V ± 5 µA

I

Output bias current (B pins) VCC = 4.5V; BiasV = 2.4V; VO = 0, OE = V

CC

1

Quiescent supply current VCC = 5.5V; IO = 0, VI = VCC or GND 2.5 mA
Control pins
Control pins VI= 3V or 0 3.5 pF

I

2

VCC = 5.5V , one input at 3.4V,
other inputs at VCC or GND

T erminal capacitance VO = 3V or 0; switch off 9.0 pF

VCC = 4.5V; VI = 0V; II = 64mA 5 7

On-resistance VCC = 4.5V; VI = 0V; II = 30mA 5 7 Ω

VCC = 4.5V; VI = 2.4V; II = –15mA 10 15

Pass voltage VIN = VCC = 5.0V; I

P

Undershoot static current

4

protection

, measure VB ≥ 3V

USP

VCC = 5.0V, BiasV = V
IB = –5µA, VB ≥ 3V

= –100µA 3.4 3.6 3.9 V

out

CC

–10 mA

or GND

CC

Max

–0.25 mA

2.5 mA

V

1999 Apr 05

4

Philips Semiconductors Product specification

10-bit bus switch with precharged outputs

CBT6810

and Schottky undershoot protection for live insertion

AC CHARACTERISTICS FOR VCC = 5.0V ±0.5V RANGE

GND = 0V; tr = tf ≤ 2.5ns; CL = 50pF.

LIMITS

T

SYMBOL PARAMETER WAVEFORM

MIN TYP

2

1 0.25 ns
2 1.8 3.5 5.3 ns

2 2.1 4.2 7.2 ns

2 1.7 3.7 6.1 ns

2 1.0 5.5 7.3 ns

t

PZH

t

PZL

t

PHZ

t

PLZ

t

pd

Propagation delay An to Bn; Bn to An
3-State output enable time

OE to An; OE to Bn; BIASV = GND
3-State output enable time

OE to An; OE to Bn; BIASV = 3.0V
3-State output enable time

OE to An; OE to Bn; BIASV = GND
3-State output enable time

OE to An; OE to Bn; BIASV = 3.0V

NOTE:

1. All typical values are measured at T

2. Warranted but not production tested. The propagation delay is based on the RC time constant of the typical ON-state resistance of the

= 25°C and VCC = 5.0V

amb

switch and a load capacitance of 50pF, when driven by an ideal voltage source (zero output impedance)

AC WAVEFORMS

TEST CIRCUIT AND WAVEFORMS

VM = 1.5V, VIN = GND to 3.0V

INPUT

1.5V

3 V

1.5V

0 V

t

PLH

t

PHL

V

OH

From Output
Under Test

C

L

= 50 pF

= –40 to +85°C

amb

500 Ω

500 Ω

Load Circuit

1

UNIT

MAX

7 V

S1

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
V

0V

OL

OH

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. Waveforms 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 ≤ 10MHz, 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.

1999 Apr 05

5

Philips Semiconductors Product specification

10-bit bus switch with precharged outputs
and Schottky undershoot protection for live insertion

TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm SOT355-1

CBT6810

1999 Apr 05

6

Philips Semiconductors Product specification

10-bit bus switch with precharged outputs
and Schottky undershoot protection for live insertion

NOTES

CBT6810

1999 Apr 05

7

Philips Semiconductors Product specification

10-bit bus switch with precharged outputs
and Schottky undershoot protection for live insertion

CBT6810

DEFINITIONS

Data Sheet Identification Product Status Definition

Objective Specification

Preliminary Specification

Product Specification

Formative or in Design

Preproduction Product

Full Production

Philips Semiconductors and Philips Electronics North America Corporation reserve 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. Applications that are described herein for any of these products are for illustrative purposes
only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing
or modification.

LIFE SUPPORT APPLICA TIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected

to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.

Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone [phone]

This data sheet contains the design target or goal specifications for product development. Specifications
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.

Philips Semiconductors and Philips Electronics North America Corporation

register eligible circuits under the Semiconductor Chip Protection Act.

 Copyright Philips Electronics North America Corporation 1998

All rights reserved. Printed in U.S.A.