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DM74LS645N Datasheet

  • DM74LS645N

  • Octal Bus Transceiver

  • 77.63KB

  • FAIRCHILD

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DM74LS645 Octal Bus Transceiver
August 1986
Revised March 2000
DM74LS645
Octal Bus Transceiver
General Description
These octal bus transceivers are designed for asynchro-
nous two-way communication between data buses. The
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 that the buses are effectively
isolated.
Features
s
Bi-directional bus transceivers in high-density 20-pin
packages
s
Hysteresis at bus inputs improves noise margins
s
3-STATE outputs
Ordering Code:
Order Number
DM74LS645WM
DM74LS645N
Package Number
M20B
N20A
Package Description
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
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Connection Diagram
Function Table
Control
Inputs
G
L
L
H
H
=
HIGH Level
L
=
LOW Level
X
=
Irrelevant
DM74LS645
DIR
L
H
X
B data to A bus
A data to B bus
Isolation
漏 2000 Fairchild Semiconductor Corporation
DS009056
www.fairchildsemi.com

DM74LS645N 产品属性

  • Fairchild Semiconductor

  • Bipolar

  • 74LS

  • 8

  • TTL

  • TTL

  • 3-State

  • - 15 mA

  • 24 mA

  • 15 ns

  • 5.25 V

  • 4.75 V

  • + 70 C

  • DIP-20

  • Rail

  • Bus Transceiver

  • 0 C

  • Through Hole

  • 1

  • Non-Inverting

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