HD74HC323 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HD74HC323

8-bit Universal Shift/Storage Register (with 3-state Outputs)

Hitachi -> Renesas Electronics 

HD74HC323

8-bit Universal Shift/Storage Register (with 3-state Outputs)

Description

This eight-bit universal register features multiplexed I/O ports to achieve full eight bit data handling in a

single 20-pin package. HD74HC323 applications are as stacked or push-down registers, buffer storage, and

accumulator registers.

Two function-select inputs and two output control inputs can be used to choose the modes of operation

listed in the function table.

Synchronous parallel loading is accomplished by taking both function-select lines S0 and S1 high. This

places the three-state outputs in a high-impedance state, which permits data that is applied on the I/O ports

to be clocked into the register. Reading out of this register can be accomplished while the outputs are

enabled in any mode. The clear function is synchronous, and a low level at the clear input clears the

register on the next low-to-high transition of the clock.

Features

• High Speed Operation: tpd (Clock to Q) = 20 ns typ (CL = 50 pF)

• High Output Current: Fanout of 15 LSTTL Loads

• Wide Operating Voltage: VCC = 2 to 6 V

• Low Input Current: 1 µA max

• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)

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