DM74ALS540A Octal Inverting Buffer and Line Driver with 3-STATE Outputs
October 1986
Revised February 2000
DM74ALS540A
Octal Inverting Buffer and Line Driver
with 3-STATE Outputs
General Description
This octal buffer and line driver is designed to have the per-
formance of the DM74ALS240A series and, at the same
time, offer a pinout with inputs and outputs on opposite
sides of the package. This arrangement greatly enhances
printed circuit board layout. The 3-STATE control gate is a
2-input NOR such that if either G1 or G2 is HIGH, all eight
outputs are in the high impedance state.
Features
s
Advanced oxide-isolated, ion-implanted Schottky TTL
process
s
Switching performance is guaranteed over full tempera-
ture and V
CC
supply range
s
Data flow-thru pinout (All inputs on opposite side from
outputs)
s
P-N-P inputs reduce DC loading
Ordering Code:
Order Number
DM74ALS540AWM
DM74ALS540ASJ
DM74ALS540AN
Package Number Package Description
M20B
M20D
N20A
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm 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
Inputs
G1
H
X
L
L
G2
X
H
L
L
A
X
X
L
H
Output
Y
Hi-Z
Hi-Z
H
L
H
=
HIGH Logic Level
L
=
LOW Logic Level
X
=
Don't Care (Either HIGH or LOW Logic Level)
Hi-Z
=
High Impedance (OFF) State
漏 2000 Fairchild Semiconductor Corporation
DS009170
www.fairchildsemi.com
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