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IN74HC323A

8-Bit Bidirectional Universal Shift Register with Parallel I/O High-Performance Silicon-Gate CMOS

IK Semicon Co., Ltd 

TECHNICAL DATA

8-Bit Bidirectional Universal

Shift Register with Parallel I/O

High-Performance Silicon-Gate CMOS

IN74HC323A

The IN74HC323A is identical in pinout to the LS/ALS323. The

device inputs are compatible with standard CMOS outputs; with pullup

resistors, they are compatible with LS/ALSTTL outputs.

The IN74HC323A features a multiplexed parallel input/output data

port to active full 8-bit handling in a 20 pin package. Due to the large

output drive capability and the 3-state feature, this device is ideally suited

for interface with bus lines in a bus-oriented system.

Two Mode-Select inputs and two Output Enable inputs are used to

choose the mode of operation as listed in the Function Table.

Synchronous parallel loading is accomplished by taking both Mode-

Select lines, S1 and S2, high. This places the outputs in the high-

impedance state, which permits data applied to the data port to be clocked

into the register. Reading out of the register can be accomplished when

the outputs are enabled. The active-low synchronous Reset overrides all

other inputs.

• Outputs Directly Interface to CMOS, NMOS, and TTL

• Operating Voltage Range: 2.0 to 6.0 V

• Low Input Current: 1.0 µA

• High Noise Immunity Characteristic of CMOS Devices

ORDERING INFORMATION

IN74HC323AN Plastic

IN74HC323ADW SOIC

TA = -55° to 125° C for all packages

PIN ASSIGNMENT

LOGIC DIAGRAM

PIN 20=VCC

PIN 10 = GND

Rev. 00

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