74VHCT244A
OCTAL BUS BUFFER
WITH 3 STATE OUTPUTS (NON INVERTED)
August 1999
n HIGH SPEED: tPD = 3.9 ns (TYP.) at VCC =5V
n LOW POWER DISSIPATION:
ICC =4 µA (MAX.) at TA =25
o
C
n COMPATIBLEWITH TTL OUTPUTS:
VIH =2V(MIN),VIL = 0.8V(MAX)
n POWERDOWN PROTECTIONON INPUTS &
OUTPUTS
n SYMMETRICAL OUTPUT IMPEDANCE:
|IOH|=IOL = 8 mA (MIN)
n BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
n OPERATING VOLTAGE RANGE:
VCC (OPR) = 4.5V to 5.5V
n PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 244
n IMPROVED LATCH-UP IMMUNITY
n LOW NOISEV
OLP
= 0.9V(Max.)
DESCRIPTION
The 74VHCT244A is an advanced high speed
CMOS OCTAL BUS BUFFER (3-STATE)
fabricated with sub-micron silicon gate and
double-layer metal wiring C
2
MOS technology.
G output enable governs four BUS BUFFERs.
This device is designed to be used with 3 state
memory address drivers, etc.
Power down protection is provided on all inputs
and outputs and 0 to 7V can be accepted on
inputs with no regard to the supply voltage. This
device can be used to interface 5V to 3V.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES :
74VHCT244AM 74VHCT244AT
M
(Micro Package)
T
(TSSOP Package)

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