© 2000 Fairchild Semiconductor Corporation DS009170 www.fairchildsemi.com
October 1986
Revised February 2000
DM74ALS540A
Octal
I
nver
ti
ng Buf
f
er
and
Li
ne Dr
iver
wi
th
3-ST
A
T
E Out
puts
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
a73 Advanced oxide-isolated, ion-implanted Schottky TTL
process
a73 Switching performance is guaranteed over full tempera-
ture and V
CC
supply range
a73 Data flow-thru pinout (All inputs on opposite side from
outputs)
a73 P-N-P inputs reduce DC loading

Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram Function Table
H = HIGH Logic Level
L = LOW Logic Level
X = Don't Care (Either HIGH or LOW Logic Level)
Hi-Z = High Impedance (OFF) State
Order Number Package Number Package Description
DM74ALS540AWM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74ALS540ASJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74ALS540AN N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Inputs Output
G 1G 2A Y
H X X Hi-Z
X H X Hi-Z
LLLH
LLHL