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74VHCT373AM Schematic ( PDF Datasheet ) - STMicroelectronics

Teilenummer 74VHCT373AM
Beschreibung OCTAL D-TYPE LATCH WITH 3 STATE OUTPUT NON INVERTING
Hersteller STMicroelectronics
Logo STMicroelectronics Logo 




Gesamt 10 Seiten
74VHCT373AM Datasheet, Funktion
® 74VHCT373A
OCTAL D-TYPE LATCH
WITH 3 STATE OUTPUT NON INVERTING
s HIGH SPEED: tPD = 6.4 ns (TYP.) at VCC = 5V
s LOW POWER DISSIPATION:
ICC = 4 µA (MAX.) at TA = 25 oC
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 373
s IMPROVED LATCH-UP IMMUNITY
s LOW NOISE: VOLP = 0.9V (Max.)
DESCRIPTION
The 74VHCT373A is an advanced high-speed
CMOS OCTAL D-TYPE LATCH with 3 STATE
OUTPUT NON INVERTING fabricated with
sub-micron silicon gate and double-layer metal
wiring C2MOS technology.
This 8 bit D-Type latch is controlled by a latch
enable input (LE) and an output enable input
M
(Micro Package)
T
(TSSOP Package)
ORDER CODES :
74VHCT373AM
74VHCT373AT
(OE).
While the LE input is held at a high level, the Q
outputs will follow the data inputs precisely. When
the LE is taken low, the Q outputs will be latched
precisely at the logic level of D input data. While
the (OE) input is low, the 8 outputs will be in a
normal logic state (high or low logic level) and
while high level the outputs will be in a high
impedance state.
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
November 1999
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74VHCT373AM Datasheet, Funktion
74VHCT373A
WAVEFORM 1: LE TO Qn PROPAGATION DELAYS, LE MINIMUM PULSE WIDTH,
Dn TO LE SETUP AND HOLD TIMES (f=1MHz; 50% duty cycle)
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