dm74als645a Fairchild Semiconductor, dm74als645a Datasheet

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dm74als645a

Manufacturer Part Number
dm74als645a
Description
Dm74als645a Octal Bus Transceivers
Manufacturer
Fairchild Semiconductor
Datasheet
© 2000 Fairchild Semiconductor Corporation
DM74ALS645AWM
DM74ALS645AN
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.
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
H
X
Order Number
LOW Logic Level
HIGH Logic Level
Either LOW or HIGH Logic Level
G
H
L
L
Control
Inputs
Package Number
DIR
H
X
L
M20B
N20A
B Data to A Bus
A Data to B Bus
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Operation
Isolation
DS009304
Features
Logic Diagram
Advanced Oxide-isolated Ion-implanted Schottky TTL
process
Switching performance is guaranteed over full tempera-
ture and V
Switching performance specified at 50 pF
PNP input design reduces input loading
Package Description
CC
supply range
March 1987
Revised February 2000
www.fairchildsemi.com

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dm74als645a Summary of contents

Page 1

... Package Number 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 Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. ...

Page 2

Absolute Maximum Ratings Supply Voltage Input Voltage; Control Inputs I/O Ports Operating Free Air Temperature Range Storage Temperature Range Typical JA N Package M Package Recommended Operating Conditions Symbol Parameter V Supply Voltage CC V HIGH Level Input Voltage IH ...

Page 3

Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Package Number M20B 3 www.fairchildsemi.com ...

Page 4

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right ...

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