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DM74ALS645A Fiches technique(PDF) 1 Page - Fairchild Semiconductor

No de pièce DM74ALS645A
Description  Octal Bus Transceivers
Download  4 Pages
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Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

DM74ALS645A Fiches technique(HTML) 1 Page - Fairchild Semiconductor

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© 2000 Fairchild Semiconductor Corporation
DS009304
www.fairchildsemi.com
March 1987
Revised February 2000
DM74ALS645A
Octal Bus Transceivers
General Description
These octal bus transceivers are designed for asynchro-
nous two-way communication between data busses. These
devices transmit data from the A bus to the B bus or from
the B bus to the A bus depending upon the level at the
direction control (DIR) input. The enable input (G) can be
used to disable the device so the busses are effectively
isolated.
Features
s Advanced Oxide-isolated Ion-implanted Schottky TTL
process
s Switching performance is guaranteed over full tempera-
ture and VCC supply range
s Switching performance specified at 50 pF
s PNP input design reduces input loading
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
L
= LOW Logic Level
H
= HIGH Logic Level
X
= Either LOW or HIGH Logic Level
Logic Diagram
Order Number
Package Number
Package Description
DM74ALS645AWM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74ALS645AN
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Control
Inputs
Operation
G
DIR
L
L
B Data to A Bus
L
H
A Data to B Bus
HX
Isolation


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