Texas Instruments SN74CBT3257DR, SN74CBT3257PWLE, SN74CBT3257PWR, SN74CBT3257D, SN74CBT3257DBLE Datasheet

FUNCTION

SN74CBT3257

4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER

SCDS017I – MAY 1995 – REVISED MAY 1998

D

Functionally Equivalent to QS3257

D

5-Ω Switch Connection Between Two Ports

D

TTL-Compatible Input Levels

D

Package Options Include Plastic
Small-Outline (D), Shrink Small-Outline
(DB, DBQ), and Thin Shrink Small-Outline
(PW) Packages

description

The SN74CBT3257 is a 4-bit 1-of-2 high-speed
TTL-compatible FET multiplexer/demultiplexer.
The low on-state resistance of the switch allows
connections to be made with minimal propagation
delay .

Output-enable (OE
select the appropriate B1 and B2 outputs for the
A-input data.

The SN74CBT3257 is characterized for operation
from –40°C to 85°C.

) and select-control (S) inputs

FUNCTION TABLE

INPUTS

OE S

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

H X Disconnect

D, DB, DBQ, OR PW PACKAGE

1B1
1B2

1A
2B1
2B2

2A

GND

(TOP VIEW)

S

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10

V

CC

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

9

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Copyright  1998, Texas Instruments Incorporated

1

SN74CBT3257
4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER

SCDS017I – MAY 1995 – REVISED MAY 1998

logic diagram (positive logic)

1A

2A

3A

4A

4

7

9

12

11

10

14

2

1B1

3

1B2

5

2B1

6

2B2

3B1

3B2

4B1

OE

13

4B2

1

S

15

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265