HD74HC589 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD74HC589

8-bit Serial of Parallel-input/Serial-output Shift Register (with 3-state outputs)

Hitachi -> Renesas Electronics 

HD74HC589

8-bit Serial of Parallel-input/Serial-output Shift Register

(with 3-state outputs)

Description

The HD74HC589 is similar in function to the HD74HC597, which is not a 3-state device.

This device consists of an 8-bit storage latch which feeds parallel data to an 8-bit shift register. Data can

also be loaded serially (see Function Table). The shift register output, OH, is a three-state output, allowing

this device to be used in bus-oriented systems.

Features

• High Speed Operation: tpd (Shift Clock to QH) = 15 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)

Function Table

Latch Clock

LCK

Shift Clock

SCK

X

X

X

X

L, H,

X

L, H,

Serial Shift/

Parallel Load

X

L

L

X

H

Output Enable Function

OE

X

Data are loaded into input latches

L

Data are loaded from input into shift

registers

L

Data are transfered from input

latches to shift registers

H

Outputs are disabled

L

Serial shift Qn = Qn – 1, Q0 = SER

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