DM74ALS245ASJX View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
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DM74ALS245ASJX Datasheet PDF : 6 Pages
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September 1986
Revised February 2000
DM74ALS245A
Octal 3-STATE Bus Transceiver
General Description
This advanced low power Schottky device contains 8 pairs
of 3-STATE logic elements configured as octal bus trans-
ceivers. These circuits are designed for use in memory,
microprocessor systems and in asynchronous bidirectional
data buses. Two way communication between buses is
controlled by the (DIR) input. Data transmits either from the
A bus to the B bus or from the B bus to the A bus. Both the
driver and receiver outputs can be disabled via the (G)
enable input which causes outputs to enter the high imped-
ance mode so that the buses are effectively isolated.
Features
s Advanced oxide-isolated, ion-implanted Schottky TTL
process
s Non-inverting logic output
s Glitch free bus during power up and down
s 3-STATE outputs independently controlled on A and B
buses
s Low output impedance to drive terminated transmission
lines to 133Ω
s Switching response specified into 500Ω/50 pF
s Specified to interface with CMOS at VOH = VCC − 2V
s PNP inputs to reduce input loading
s Switching specifications guaranteed over full tempera-
ture and VCC range
Ordering Code:
Order Number Package Number
Package Description
DM74ALS245AWM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74ALS245ASJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74ALS245AMSA
MSA20
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
DM74ALS245AN
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
Function Table
Control
Inputs
G
DIR
L
L
L
H
H
X
H = HIGH Logic Level
L = LOW Logic Level
X = Either HIGH or LOW Logic Level
Operation
B Data to A Bus
A Data to B Bus
Hi-Z
© 2000 Fairchild Semiconductor Corporation DS006213
www.fairchildsemi.com
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