TECHNICAL DATA
IN74AC533
Octal 3-State Inverting
Transparent Latch
High-Speed Silicon-Gate CMOS
The IN74AC533 is identical in pinout to the LS/ALS533,
HC/HCT533. The device inputs are compatible with standard CMOS
outputs; with pullup resistors, they are compatible with LS/ALS
outputs.
These latches appear transparent to data (i.e., the outputs change
asynchronously) when Latch Enable is high. The data appears as the
outputs in inverted form. When Latch Enable goes low, data meeting
the setup and hold time becomes latched.
The Output Enable input does not affect the state of the latches, but
when Output Enable is high, all device outputs are forced to the high-
impedance state. Thus, data may be latched even when the outputs are
not enabled.
ORDERING INFORMATION
IN74AC533N Plastic
IN74AC533DW SOIC
TA = -40° to 85° C for all
packages
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Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2.0 to 6.0 V
Low Input Current: 1.0 µA; 0.1 µA @ 25°C
High Noise Immunity Characteristic of CMOS Devices
Outputs Source/Sink 24 mA
PIN ASSIGNMENT
3-State Outputs for Bus Interfacing
LOGIC DIAGRAM
FUNCTION TABLE
Inputs
Latch
Enable Enable
Output
Q
Output
D
L
L
L
H
H
L
H
L
L
H
X
no
change
H
X
X
Z
X = don’t care
Z = high impedance
PIN 20=VCC
PIN 10 = GND
436
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