• Selects One of Two 4-Bit Data Sources and

Synchronously Stores Data With System

Clock

• Applications:

− Dual Source for Operands and Constants

in Arithmetic Processor; Can Release

Processor Register Files for Acquiring

New Data

− Implements Separate Registers Capable

of Parallel Exchange of Contents, Yet

Retains External Load Capability

− Has Universal-Type Register for

Implementing Various Shift Patterns,

Including Compound Left-Right

Capability

• Package Options Include Plastic

Small-Outline (D) Packages and Standard

Plastic (N) 300-mil DIPs

description

The SN74AS298A is a quadruple 2-input multiplexer with storage that provides essentially the equivalent

functional capabilities of two separate MSI functions (SN74AS157 and ′AS175A) in a 16-pin package.

When the word-select (WS) input is low, word 1 (A1, B1, C1, D1) is applied to the flip-flops. A high input to WS

causes the selection of word 2 (A2, B2, C2, D2). The selected word is clocked to the output terminals on the

negative-going edge of the clock pulse.

The SN74AS298A is characterized for operation from 0°C to 70°C.