SN74CBT3257 Datasheet, PDF (1/12 Pages) Texas Instruments – 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER

SN74CBT3257
4ĆBIT 1ĆOFĆ2 FET MULTIPLEXER/DEMULTIPLEXER
D 5-Ω Switch Connection Between Two Ports
SCDS017M − MAY 1995 − REVISED JANUARY 2004
D TTL-Compatible Input Levels
D, DB, DBQ, OR PW PACKAGE
(TOP VIEW)
RGY PACKAGE
(TOP VIEW)
S1
1B1 2
1B2 3
1A 4
2B1 5
2B2 6
2A 7
GND 8
16 ^V_CC
15 ^OE
14 ^4B1
13 4B2
12 4A
11 3B1
10 3B2
9 3A
1
1B1 2
1B2 3
1A 4
2B1 5
2B2 6
2A 7
8
16
15 OE
14 4B1
13 4B2
12 4A
11 3B1
10 3B2
9
description/ordering information
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) and select-control (S) inputs select the appropriate B1 and B2 outputs for the A-input data.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
QFN − RGY
Tape and reel SN74CBT3257RGYR CU257
SOIC − D
Tube
Tape and reel
SN74CBT3257D
SN74CBT3257DR
CBT3257
−40°C to 85°C SSOP − DB
Tape and reel
SSOP (QSOP) − DBQ Tape and reel
SN74CBT3257DBR CU257
SN74CBT3257DBQR CU257
TSSOP − PW
Tube
Tape and reel
SN74CBT3257PW
SN74CBT3257PWR
CU257
† _{Package drawings, standard packing quantities, thermal data, symbolization, and PCB design}
guidelines are available at www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
OE
S
FUNCTION
L
L A port = B1 port
L
H A port = B2 port
H
X
Disconnect
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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.
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Copyright  2004, Texas Instruments Incorporated
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