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PDF DM74ALS640A Data sheet ( Hoja de datos )
| Número de pieza | DM74ALS640A | |
| Descripción | Inverting Octal Bus Transceiver | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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August 1985
Revised February 2000
DM74ALS640A
Inverting Octal Bus Transceiver
General Description
This inverting octal bus transceiver is designed for asyn-
chronous two-way communication between data busses.
This device transmits 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:
Order Number Package Number
Package Description
DM74ALS640AWM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74ALS640AN
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.
Connection Diagram
Logic Diagram
Function Table
L = LOW Logic Level
H = HIGH Logic Level
X = Either LOW or HIGH Logic Level
Control
Inputs
G DIR
LL
LH
HX
Operation
B Data to A Bus
A Data to B Bus
Isolation
© 2000 Fairchild Semiconductor Corporation DS008640
www.fairchildsemi.com
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| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet DM74ALS640A.PDF ] | |
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