Datasheet > 54ACT399MW8

54ACT399MW8

更新时间： 2024-01-18 19:55:19

品牌	Logo	应用领域
德州仪器 - TI		/
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54ACT399MW8 数据手册

August 1998

54ACT399

Quad 2-Port Register

General Description

Features

n I_CCreduced by 50%

The ’AC/ACT399 is the logical equivalent of a quad 2-input

multiplexer feeding into four edge-triggered flip-flops. A com-

mon Select input determines which of the two 4-bit words is

accepted. The selected data enters the flip-flop on the rising

edge of the clock.

n Select inputs from two data sources

n Fully positive edge-triggered operation

n Outputs source/sink 24 mA

n ACT399 has TTL-compatible inputs

Logic Symbols

Connection Diagrams

Pin Assignment

for DIP and Flatpak

DS100356-1

IEEE/IEC

DS100356-3

Pin Assignment

for LCC

DS100356-5

DS100356-2

Pin Names

Description

Common Select Input

Clock Pulse Input

_0a–I _0d

_1a–I_1d

Data Inputs from Source 0

Data Inputs from Source 1

Q_a–Q_d

TRI-STATE^®is a registered trademark of National Semiconductor Corporation.

FACT^®is a registered trademark of Fairchild Semiconductor Corporation.

DS100356

www.national.com

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