• 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.