74VHCT244A Octal Buffer/Line Driver with 3-STATE Outputs
March 1997
Revised April 2005
74VHCT244A
Octal Buffer/Line Driver with 3-STATE Outputs
General Description
The VHCT244A is an advanced high speed CMOS octal
bus transceiver fabricated with silicon gate CMOS technol-
ogy. It achieves high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low
power dissipation. The VHCT244A is a non-inverting
3-STATE buffer having two active-LOW output enables.
This device is designed to be used as 3-STATE memory
address drivers, clock drivers, and bus oriented transmitter/
receivers.
Protection circuits ensure that 0V to 7V can be applied to
the input and output (Note 1) pins without regard to the
supply voltage. These circuits prevent device destruction
due to mismatched supply and input/output voltages. This
device can be used to interface 5V to 3V systems and two
supply systems such as battery back up.
Note 1:
Outputs in OFF-State
Features
s
High Speed: t
PD
5.9 ns (typ) at V
CC
5V
s
Power down protection is provided on inputs and
outputs
s
Low power dissipation: I
CC
4
P
A (max) @ T
A
25
q
C
s
Pin and function compatible with 74HCT244
Ordering Code:
Order Number
74VHCT244AM
74VHCT244ASJ
74VHCT244AMTC
74VHCT244AN
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
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Pb-Free package per JEDEC J-STD-020B.
Logic Symbol
Connection Diagram
漏 2005 Fairchild Semiconductor Corporation
DS500003
www.fairchildsemi.com
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