DM74AS1805 Hex 2-Input NOR Driver
July 1985
Revised March 2000
DM74AS1805
Hex 2-Input NOR Driver
General Description
These devices contain six independent 2-Input drivers
each of which performs the logic NOR function. The
DM74AS1805 is equivalent to the DM74AS805B but the
supply voltage and ground pins are centered in the pack-
age. This positioning of the supply voltage and ground pins
reduce the lead inductance of these pins. This reduction of
lead inductance will minimize noise generated onto either
the supply voltage or ground bus which is significant in high
current switching applications.
Features
s
Switching specifications at 50 pF
s
Switching specifications guaranteed over full tempera-
ture and V
CC
range
s
Advanced oxide-isolated, ion-implanted Schottky TTL
process
s
Centered V
CC
and GND configuration provides minimum
lead inductance for high current switching applications
s
High capacitive drive capability
Ordering Code:
Order Number
DM74AS1805WM
DM74AS1805N
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
Y
=
A
+
B
INPUTS
A
L
L
H
H
H
=
HIGH Logic Level
L
=
LOW Logic Level
OUTPUT
B
L
H
L
H
Y
H
L
L
L
漏 2000 Fairchild Semiconductor Corporation
DS008618
www.fairchildsemi.com
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