900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






etcTI

SN74HCT257 Datasheet Preview

SN74HCT257 Datasheet

QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXER

No Preview Available !

SN54HCT257, SN74HCT257
QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS
WITH 3ĆSTATE OUTPUTS
SCLS072D − NOVEMBER 1988 − REVISED SEPTEMBER 2003
D Operating Voltage Range of 4.5 V to 5.5 V
D High-Current 3-State Outputs Interface
Directly With System Bus
D Typical tpd = 17 ns
D Low Power Consumption, 80-µA Max ICC
D ±6-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
D Inputs Are TTL-Voltage Compatible
D Provide Bus Interface From Multiple
Sources in High-Performance Systems
D Buffered Inputs and Outputs
SN54HCT257 . . . J PACKAGE
SN74HCT257 . . . D OR N PACKAGE
(TOP VIEW)
SN54HCT257 . . . FK PACKAGE
(TOP VIEW)
A/B 1
1A 2
1B 3
1Y 4
2A 5
2B 6
2Y 7
GND 8
16 VCC
15 OE
14 4A
13 4B
12 4Y
11 3A
10 3B
9 3Y
1B
3 2 1 20 19
4
18
4A
1Y 5
17 4B
NC 6
16 NC
2A 7
15 4Y
2B 8
14 3A
9 10 11 12 13
description/ordering information
NC − No internal connection
The ’HCT257 devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in
bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at
the high logic level.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N
Tube of 25
SN74HCT257N
SN74HCT257N
−40°C to 85°C
SOIC − D
Tube of 40
Reel of 2500
Reel of 250
SN74HCT257D
SN74HCT257DR
SN74HCT257DT
HCT257
CDIP − J
−55°C to 125°C
LCCC − FK
Tube of 25
Tube of 55
SNJ54HCT257J
SNJ54HCT257FK
SNJ54HCT257J
SNJ54HCT257FK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
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.
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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 2003, Texas Instruments Incorporated
1




etcTI

SN74HCT257 Datasheet Preview

SN74HCT257 Datasheet

QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXER

No Preview Available !

SN54HCT257, SN74HCT257
QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS
WITH 3ĆSTATE OUTPUTS
SCLS072D − NOVEMBER 1988 − REVISED SEPTEMBER 2003
FUNCTION TABLE
INPUTS
SELECT
OE
A/B
DATA
A
B
OUTPUT
Y
H
X
X
X
Z
L
L
L
X
L
L
L
H
X
H
L
H
X
L
L
L
H
X
H
H
logic diagram (positive logic)
OE 15
A/B 1
1A 2
1B 3
2A 5
6
2B
3A 11
10
3B
14
4A
4B 13
Pin numbers shown are for the D, J, and N packages.
4 1Y
7 2Y
9 3Y
12
4Y
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN74HCT257
Description QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXER
Maker etcTI
Total Page 3 Pages
PDF Download

SN74HCT257 Datasheet PDF

View PDF for Mobile






Similar Datasheet

1 SN74HCT257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXER
etcTI





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy