Datasheet CBT3257 Datasheet (Philips)

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INTEGRATED CIRCUITS

CBT3257

Quad 1-of-2 multiplexer/demultiplexer

Product data
Supersedes data of 27 Sep 2002

Philips
Semiconductors

2002 Dec 13

Philips Semiconductors Product data

CBT3257Quad 1-of-2 multiplexer/demultiplexer

2

2002 Dec 13

FEATURES

• 5 Ω switch connection between two ports

• TTL-compatible input levels

• Minimal propagation delay through the switch

• 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 CBT3257 is a quad 1-of-2 high-speed TTL-compatible
multiplexer/demultiplexer. The low on resistance of the switch allows
inputs to be connected to outputs without adding propagation delay
or generating additional ground bounce noise.

Output Enable (OE

) and select-control (S) inputs select the

appropriate B1 and B2 outputs for the A-input data.
The CBT3257 is characterized for operation from -40 to +85 °C.

PIN CONFIGURATION

1
2
3
4
5
6
7
89

10

11

12

13

14

15

16

S
1B1
1B2

1A
2B1
2B2

2A

GND

V

CC

OE
4B1
4B2
4A
3B1
3B2
3A

SA00533

PIN DESCRIPTION

PIN NUMBER SYMBOL NAME AND FUNCTION

1 S Select-control input

2, 3,
5, 6,

10, 11,

13, 14

1B1, 1B2,

2B1, 2B2
3B1, 3B2
4B1, 4B2

B outputs

4, 7, 9, 12 1A, 2A, 3A, 4A A inputs

8 GND Ground (0 V)
15 OE Output enable
16 V

CC

Positive supply voltage

ORDERING INFORMATION

PACKAGES TEMPERATURE RANGE ORDER CODE TOPSIDE MARK DWG NUMBER

16-pin plastic SO -40 to 85 °C CBT3257D CBT3257D SOT109-1
16-pin plastic SSOP -40 to 85 °C CBT3257DB CT3257 SOT338-1
16-pin plastic SSOP (QSOP) -40 to 85 °C CBT3257DS CBT3257 SOT519-1
16-pin plastic TSSOP -40 to 85 °C CBT3257PW CBT3257 SOT403-1

Standard packing quantities and other packaging data is available at www.philipslogic.com/packaging.

Philips Semiconductors Product data

CBT3257Quad 1-of-2 multiplexer/demultiplexer

2002 Dec 13

3

LOGIC DIAGRAM (positive logic)

4

1A

2

1B1

3

1B2

7

2A

5

2B1

6

2B2

9

3A

11

3B1

10

3B2

12

4A

14

4B1

13

4B2

1

S

15

OE

SA00638

FUNCTION TABLE

INPUTS

OE S

FUNCTION

L L A port = B1 port
L H A port = B2 port

H X Disconnect

Philips Semiconductors Product data

CBT3257Quad 1-of-2 multiplexer/demultiplexer

2002 Dec 13

4

ABSOLUTE MAXIMUM RATINGS

1

SYMBOL

PARAMETER CONDITIONS RATING UNIT

V

CC

DC supply voltage -0.5 to +7.0 V

V

I

DC input voltage

2

-0.5 to +7.0 V

Continuous channel current 128 mA

I

K

Input clamp current V

I/O

< 0 -50 mA

T

stg

Storage temperature range -65 to +150 °C

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 input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.

RECOMMENDED OPERATING CONDITIONS

LIMITS

SYMBOL PARAMETER

MIN MAX

UNIT

V

CC

DC supply voltage 4.5 5.5 V

V

IH

High-level input voltage 2.0 — V

V

IL

Low-level Input voltage — 0.8 V

T

amb

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

NOTE:

1. All unused control inputs of the device must be held at V

CC

or GND to ensure proper device operation.

DC ELECTRICAL CHARACTERISTICS

LIMITS

SYMBOL PARAMETER TEST CONDITIONS T

amb

= -40 to +85 °C UNIT

MIN TYP

1

MAX

V

IK

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

V

P

Pass voltage VI = VCC = 5.0 V; I/O = -100 mA 3.4 3.6 3.9 V

I

I

Input leakage current VCC = 5.5 V; VI = GND or 5.5 V — — ±1 µA

I

CC

Quiescent supply current VCC = 5.5 V; IO = 0, VI = VCC or GND — — 3 µA

∆I

CC

Additional supply current per input pin

2

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

CC

or GND

— — 2.5 mA

C

I

Control pins VI= 3 V or 0 — 3.3 — pF

A port VO = 3 V or 0; OE = V

CC

— 9.9 — pF

C

IO(OFF)

Power-off leakage current

B port VO = 3 V or 0; OE = V

CC

— 6.4 — pF

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

r

on

3

On-resistance

VCC = 4.5 V; VI = 0V; II = 30 mA — 5 7 Ω

on

VCC = 4.5 V; VI = 2.4 V; II = 15 mA — 10 15 Ω

NOTES:

1. All typical values are at VCC = 5 V, T

amb

= 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.

Philips Semiconductors Product data

CBT3257Quad 1-of-2 multiplexer/demultiplexer

2002 Dec 13

5

AC CHARACTERISTICS

T

amb

= -40 to +85 °C; CL = 50 pF

LIMITS

SYMBOL PARAMETER FROM (INPUT)

TO

VCC = +5.0 V ±0.5 V

UNIT

(OUTPUT)

MIN MAX

t

pd

Propagation delay

1

A or B B or A — 0.25 ns

t

pd

Propagation delay S A 1.6 5.0 ns
Output enable time

OE A or B 1.8 5.1 ns

t

en

Output enable time
to High and Low level

S B 1.6 5.2 ns

Output disable time

OE A or B 2.2 5.5 ns

t

dis

Output disable time
from High and Low level

S B 1.0 5.0 ns

NOTE:

1. The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance,
when driven by an ideal voltage source (zero output impedance).

AC WAVEFORMS

VM = 1.5 V, VIN = GND to 3.0 V

INPUT

1.5 V

OUTPUT

t

PLH

t

PHL

SA00028

1.5 V

1.5 V 1.5 V

3 V

0 V

V

OH

V

OL

Waveform 1. Input to Output Propagation Delays

Output Control

(Low-level

enabling )

1.5 V

t

PZH

t

PHZ

V

OH

V

OL

t

PZL

t

PLZ

3.5 V

0 V

V

OL

+ 0.3 V

V

OH

- 0.3 V

SA00029

1.5 V

1.5 V 1.5 V

0 V

3 V

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)

Waveform 2. 3-State Output Enable and Disable Times

NOTES:

1. t

PLZ

and t

PHZ

are the same as t

dis

.

2. t

PZL

and t

PZH

are the same as ten.

3. t

PLH

and t

PHL

are the same as tpd.

TEST CIRCUIT AND WAVEFORMS

C

L

= 50 pF

500 Ω

Load Circuit

DEFINITIONS

C

L

= Load capacitance includes jig and probe capacitance;

see AC CHARACTERISTICS for value.

TEST S1

t

pd

open

t

PLZ/tPZL

7 V

t

PHZ/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, Z

O

= 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 data

CBT3257Quad 1-of-2 multiplexer/demultiplexer

2002 Dec 13

6

SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1

Philips Semiconductors Product data

CBT3257Quad 1-of-2 multiplexer/demultiplexer

2002 Dec 13

7

SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm SOT338-1

Philips Semiconductors Product data

CBT3257Quad 1-of-2 multiplexer/demultiplexer

2002 Dec 13

8

SSOP16: plastic shrink small outline package; 16 leads;
body width 3.9 mm; lead pitch 0.635 mm SOT519-1

Philips Semiconductors Product data

CBT3257Quad 1-of-2 multiplexer/demultiplexer

2002 Dec 13

9

TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm SOT403-1

Philips Semiconductors Product data

CBT3257Quad 1-of-2 multiplexer/demultiplexer

2002 Dec 13

10

REVISION HISTORY

Rev

Date Description

_2 20021213 Product data (9397 750 10869); ECN 853-2381 29158 of 06 November 2002.

Modifications:

• Corrections to Block Diagram graphic.

_1 20020927 Product data (9397 750 10332); ECN 853-2381 28892 of 27 September 2002.

Philips Semiconductors Product data

CBT3257Quad 1-of-2 multiplexer/demultiplexer

2002 Dec 13

11

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: [phone]

For sales offices addresses send e-mail to:
[e-mail].

 Koninklijke Philips Electronics N.V. 2002

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

Date of release: 12-02

Document order number: 9397 750 10869

Philips
Semiconductors

Data sheet status

[1]

Objective data

Preliminary data

Product data

Product
status

[2] [3]

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).

Data sheet status

[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.

Level

I

II

III