Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.NET

X  

Preview PDF Download HTML

DM74AS640WM Datasheet(HTML) 1 Page - Fairchild Semiconductor

Part No. DM74AS640WM
Description  3-STATE Octal Bus Transceiver
Download  5 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo 

DM74AS640WM Datasheet(HTML) 1 Page - Fairchild Semiconductor

   
Zoom Inzoom in Zoom Outzoom out
Go To Page :
/ 5 page
background image
© 2000 Fairchild Semiconductor Corporation
DS006708
www.fairchildsemi.com
October 1986
Revised March 2000
DM74AS640
3-STATE Octal Bus Transceiver
General Description
This advanced Schottky device contains 8 pairs of 3-
STATE logic elements configured as octal bus transceiver.
This circuit is designed for use in memory, microprocessor
systems and in asynchronous bidirectional data buses.
This device transmits data from the A bus to the B bus, or
vice versa, depending upon the logic level of the direction
control input (DIR). The enable input (G) can be used to
disable the devices, effecting isolation of buses A and B.
The 3-STATE circuitry also contains a protection feature
that prevents these transceivers from glitching the bus dur-
ing power-up or power-down.
Features
s Switching specifications at 50 pF
s Switching specifications guaranteed over full tempera-
ture and VCC range
s Advanced oxide-isolated, ion-implanted Schottky TTL
process
s Functionally and pin for pin compatible with Schottky,
low power Schottky, and advanced low power Schottky
TTL counterpart
s Improved AC performance over Schottky, low power
Schottky, and advanced low power Schottky counter-
parts
s 3-STATE outputs independently controlled on A and B
buses
s Low output impedance drive to drive terminated trans-
mission lines to 133
s Specified to interface with CMOS at VOH = VCC − 2V
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Top View
Function Table
H
= HIGH Logic Level
L
= LOW Logic Level
X
= Immaterial
Logic Diagram
Order Number
Package Number
Package Description
DM74AS640WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74AS640N
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Control Inputs
Operation
G
DIR
LL
B Data to A Bus
LH
A Data to B Bus
HX
Isolation


Html Pages

1  2  3  4  5 


Datasheet Download




Link URL



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

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Bookmark   |   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