Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Multiplexer, demux FET multiplexer/demultiplexer Single supply SOIC 16 N

SN74CBT3257

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

SCDS017M − MAY 1995 − REVISED JANUARY 2004

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D 5-Ω Switch Connection Between Two Ports D TTL-Compatible Input Levels

1B1

1B2

2B1

2B2

GND

4B1

4B2

3B1

3B2

D, DB, DBQ, OR PW PACKAGE

(TOP VIEW)

RGY PACKAGE

(TOP VIEW)

116

4B1

4B2

3B1

3B2

1B1

1B2

2B1

2B2

GND

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

PACKAGE

†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

QFN − RGY Tape and reel SN74CBT3257RGYR CU257

SOIC D

Tube SN74CBT3257D

CBT3257

SOIC − D

Tape and reel SN74CBT3257DR

CBT3257

−40°C to 85°C

SSOP − DB Tape and reel SN74CBT3257DBR CU257

40 C

85 C

SSOP (QSOP) − DBQ Tape and reel SN74CBT3257DBQR CU257

TSSOP PW

Tube SN74CBT3257PW

CU257

TSSOP − PW

Tape and reel 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

FUNCTION

OE S

FUNCTION

L L A port = B1 port

L H A port = B2 port

H X Disconnect

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.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

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

Summary of content (19 pages)

PAGE 1
SN74CBT3257 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER SCDS017M − MAY 1995 − REVISED JANUARY 2004 D 5-Ω Switch Connection Between Two Ports D TTL-Compatible Input Levels D, DB, DBQ, OR PW PACKAGE (TOP VIEW) 15 3 14 4 13 5 12 6 11 7 10 8 9 1B1 1B2 1A 2B1 2B2 2A VCC 2 VCC OE 4B1 4B2 4A 3B1 3B2 3A 1 16 15 OE 14 4B1 2 3 13 4B2 12 4A 4 5 11 3B1 10 3B2 6 7 8 9 3A 16 S 1 GND S 1B1 1B2 1A 2B1 2B2 2A GND RGY PACKAGE (TOP VIEW) description/ordering information The SN74CBT3257 is a
PAGE 2
SN74CBT3257 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER SCDS017M − MAY 1995 − REVISED JANUARY 2004 logic diagram (positive logic) 2 4 1B1 1A 3 1B2 2A 7 5 2B1 6 2B2 11 9 3A 10 4A 14 12 13 S 1 15 OE 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3B1 3B2 4B1 4B2
PAGE 3
SN74CBT3257 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER SCDS017M − MAY 1995 − REVISED JANUARY 2004 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.
PAGE 4
SN74CBT3257 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER SCDS017M − MAY 1995 − REVISED JANUARY 2004 switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1) VCC = 5 V ± 0.5 V MIN MIN TO (OUTPUT) tpd† A or B B or A 0.35 0.25 ns tpd S A 5.5 1.6 5 ns S B 5.7 1.6 5.2 OE A or B 5.6 1.8 5.1 S B 5.2 1 5 OE A or B 5.5 2.2 5.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device SN74CBT3257DBR Package Package Pins Type Drawing SSOP SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant DB 16 2000 330.0 16.4 8.2 6.6 2.5 12.0 16.0 Q1 SN74CBT3257DR SOIC D 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.0 Q1 SN74CBT3257PWR TSSOP PW 16 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.
PAGE 8
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74CBT3257DBR SSOP DB 16 2000 367.0 367.0 38.0 SN74CBT3257DR SOIC D 16 2500 333.2 345.9 28.6 SN74CBT3257PWR TSSOP PW 16 2000 367.0 367.0 35.0 SN74CBT3257RGYR VQFN RGY 16 3000 367.0 367.0 35.
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MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,25 0,09 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0°–ā8° 0,95 0,55 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 /E 12/01 NOTES: A. B. C. D. All linear dimensions are in millimeters.
PAGE 19
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.