Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

SN54HCT257 Datasheet(PDF) 1 Page - Texas Instruments

Part No. SN54HCT257
Description  QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS
Download  9 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN54HCT257 Datasheet(HTML) 1 Page - Texas Instruments

  SN54HCT257 Datasheet HTML 1Page - Texas Instruments SN54HCT257 Datasheet HTML 2Page - Texas Instruments SN54HCT257 Datasheet HTML 3Page - Texas Instruments SN54HCT257 Datasheet HTML 4Page - Texas Instruments SN54HCT257 Datasheet HTML 5Page - Texas Instruments SN54HCT257 Datasheet HTML 6Page - Texas Instruments SN54HCT257 Datasheet HTML 7Page - Texas Instruments SN54HCT257 Datasheet HTML 8Page - Texas Instruments SN54HCT257 Datasheet HTML 9Page - Texas Instruments  
Zoom Inzoom in Zoom Outzoom out
 1 / 9 page
background image
SN54HCT257, SN74HCT257
QUADRUPLE 2LINE TO 1LINE DATA SELECTORS/MULTIPLEXERS
WITH 3STATE OUTPUTS
SCLS072D − NOVEMBER 1988 − REVISED SEPTEMBER 2003
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A/B
1A
1B
1Y
2A
2B
2Y
GND
VCC
OE
4A
4B
4Y
3A
3B
3Y
SN54HCT257 ... J PACKAGE
SN74HCT257 ...D OR N PACKAGE
(TOP VIEW)
32 1 20 19
910 11 1213
4
5
6
7
8
18
17
16
15
14
4A
4B
NC
4Y
3A
1B
1Y
NC
2A
2B
SN54HCT257 . . . FK PACKAGE
(TOP VIEW)
NC − No internal connection
description/ordering information
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
Tube of 40
SN74HCT257D
−40
°C to 85°C
SOIC − D
Reel of 2500
SN74HCT257DR
HCT257
SOIC − D
Reel of 250
SN74HCT257DT
HCT257
−55
°C to 125°C
CDIP − J
Tube of 25
SNJ54HCT257J
SNJ54HCT257J
−55
°C to 125°C
LCCC − FK
Tube of 55
SNJ54HCT257FK
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.
Copyright
 2003, Texas Instruments Incorporated
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.


Html Pages

1  2  3  4  5  6  7  8  9 


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn