HD74BC563A Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD74BC563A

Octal D Type Transparent Latches With 3 State Outputs

Hitachi -> Renesas Electronics 

HD74BC563A

Octal D Type Transparent Latches With 3 State Outputs

ADE-205-040 (Z)

Rev. 0

June 1993

Description

HD74BC563A provides high drivability and operation equal to or better than high speed bipolar standard

logic IC by using Bi-CMOS process. The device features low power dissipation that is about 1/5 of high

speed bipolar logic IC, when the frequency is 10 MHz. The device has eight D type latches with three state

outputs in a 20 pin package. When the latch enable input is high, the Q outputs will follow the D inputs.

When the latch enable goes low, data at the D inputs will be retained at the outputs until latch enable

returns high again. When a high logic level is applied to the output control input, all outputs go to a high

impedance state, regardless of what signals are present at the other inputs and the state of the storage

elements.

Features

• Input/Output are at high impedance state when power supply is off.

• Built in input pull up circuit can make input pins be open, when not used.

• TTL level input

• Wide operating temperature range

Ta = –40 to +85°C.

Function Table

Output Control

Latch Enable

Data

Output Q

L

H

H

L

L

H

L

H

L

L

X

Q0

H

X

X

Z

H : High level

L : Low level

X : Immaterial

Z : High impedance

Q0 : Level of Q before the indicated steady state input conditions were established.

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