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74VHC244 Octal Buffer/Line Driver with 3-STATE Outputs
November 1992
Revised April 2005
74VHC244
Octal Buffer/Line Driver with 3-STATE Outputs
General Description
The VHC244 is an advanced high speed CMOS octal bus
buffer fabricated with silicon gate CMOS technology. It
achieves high speed operation similar to equivalent Bipolar
Schottky TTL while maintaining the CMOS low power dissi-
pation. The VHC244 is a non-inverting 3-STATE buffer hav-
ing two active-LOW output enables. These devices are
designed to be used as 3-STATE memory address drivers,
clock drivers, and bus oriented transmitter/receivers.
An input protection circuit ensures that 0V to 7V can be
applied to the input pins without regard to the supply volt-
age. This device can be used to interface 5V to 3V systems
and two supply systems such as battery back up. This cir-
cuit prevents device destruction due to mismatched supply
and input voltages.
Features
s
High Speed: t
PD
3.9ns (typ) at V
CC
V
NIL
5V
s
High noise immunity: V
NIH
s
Low noise: V
OLP
28% V
CC
(min)
s
Power down protection is provided on all inputs
0.6V (typ)
4
P
A (max) @ T
A
25
q
C
s
Low power dissipation: I
CC
s
Pin and function compatible with 74HC244
Ordering Code:
Order Number
74VHC244M
74VHC244SJ
74VHC244MTC
74VHC244N
Package Number
M20B
M20D
MTC20
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
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