2-INPUT MULTIPLEXERS. CY74FCT157T Datasheet

CY74FCT157T MULTIPLEXERS. Datasheet pdf. Equivalent

Part CY74FCT157T
Description QUAD 2-INPUT MULTIPLEXERS
Feature D Function, Pinout, and Drive Compatible With FCT and F Logic D Reduced VOH (Typically = 3.3 V) Vers.
Manufacture etcTI
Total Page 11 Pages
Datasheet
Download CY74FCT157T Datasheet



CY74FCT157T
D Function, Pinout, and Drive Compatible
With FCT and F Logic
D Reduced VOH (Typically = 3.3 V) Versions
of Equivalent FCT Functions
D Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
D Ioff Supports Partial-Power-Down Mode
Operation
D Matched Rise and Fall Times
D Fully Compatible With TTL Input and
Output Logic Levels
D ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
D CY54FCT157T
– 32-mA Output Sink Current
– 12-mA Output Source Current
D CY74FCT157T
– 64-mA Output Sink Current
– 32-mA Output Source Current
D 3-State Outputs
CY54FCT157T, CY74FCT157T
QUAD 2-INPUT MULTIPLEXERS
WITH 3-STATE OUTPUTS
SCCS014B – MAY 1994 – REVISED NOVEMBER 2001
CY74FCT157T . . . Q OR SO PACKAGE
(TOP VIEW)
S
I0a
I1a
Ya
I0b
I1b
Yb
GND
1
2
3
4
5
6
7
8
16 VCC
15 E
14 I0d
13 I1d
12 Yd
11 I0c
10 I1c
9 Yc
CY54FCT157T . . . L PACKAGE
(TOP VIEW)
I1a
3 2 1 20 19
4 18
I0d
Ya 5
17 I1d
NC 6
16 NC
I0b 7
15 Yd
I1b 8
14 I0c
9 10 11 12 13
description
NC – No internal connection
The ’FCT157T devices are quad two-input multiplexers that select four bits of data from two sources under the
control of a common data-select (S) input. The output-enable (E) input is active low. When E is high, all of the
outputs (Y) are forced low, regardless of all other input conditions.
Moving data from two groups of registers to four common output buses is a common use of the ’FCT157T
devices. The state of S determines the particular register from which the data comes. It also can be used as
a function generator. These devices are useful for implementing highly irregular logic by generating any 4 of
the 16 different functions of 2 variables, with 1 variable common.
The ’FCT157T devices are logic implementations of a four-pole, two-position switch, where the position of the
switch is determined by the logic levels at S.
These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the
outputs, preventing damaging current backflow through the device when it is powered down.
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.
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 2001, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
1



CY74FCT157T
CY54FCT157T, CY74FCT157T
QUAD 2-INPUT MULTIPLEXERS
WITH 3-STATE OUTPUTS
SCCS014B MAY 1994 REVISED NOVEMBER 2001
PIN DESCRIPTION
NAME
DESCRIPTION
S Common select input
E Enable inputs (active low)
I0 Data inputs from source 0
I1 Data inputs from source 1
Y Noninverted outputs
ORDERING INFORMATION
TA
PACKAGE
SPEED
(ns)
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
QSOP Q Tape and reel
4.3 CY74FCT157CTQCT FT157-3
40°C to 85°C
SOIC SO
QSOP Q
Tube
Tape and reel
Tape and reel
4.3 CY74FCT157CTSOC
FCT157C
4.3 CY74FCT157CTSOCT
5 CY74FCT157ATQCT FT157-1
Tube
5 CY74FCT157ATSOC
SOIC SO
FCT157A
Tape and reel 5 CY74FCT157ATSOCT
55°C to 125°C LCC L
Tube
5.8 CY54FCT157ATLMB
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
OUTPUT
E S I0 I1
Y
HXXX
L
L HX L
L
LHXH
H
LLLX
L
L LHX
H
H = High logic level, L = Low logic level,
X = Dont care
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265





@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)