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74VHCT244A Fiches technique(PDF) 1 Page - STMicroelectronics

No de pièce 74VHCT244A
Description  OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED)
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74VHCT244A Fiches technique(HTML) 1 Page - STMicroelectronics

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December 2004
s
HIGH SPEED: tPD = 5.4 ns (TYP.) at VCC = 5V
s
LOW POWER DISSIPATION:
ICC = 4 µA (MAX.) at TA=25°C
s
COMPATIBLE WITH TTL OUTPUTS:
VIH = 2V (MIN.), VIL = 0.8V (MAX)
s
POWER DOWN PROTECTION ON INPUTS
& OUTPUTS
s
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 8 mA (MIN)
s
BALANCED PROPAGATION DELAYS:
tPLH tPHL
s
OPERATING VOLTAGE RANGE:
VCC(OPR) = 4.5V to 5.5V
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 244
s
IMPROVED LATCH-UP IMMUNITY
s
LOW NOISE: VOLP = 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 C2MOS technology.
G enable input 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 since all
inputs are equipped with TTL threshold.
All
inputs
and
outputs
are
equipped
with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
74VHCT244A
OCTAL BUS BUFFER
WITH 3 STATE OUTPUTS (NON INVERTED)
Figure 1: Pin Connection And IEC Logic Symbols
Table 1: Order Codes
PACKAGE
T & R
SOP
74VHCT244AMTR
TSSOP
74VHCT244ATTR
TSSOP
SOP
Rev. 4


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