SN74AS298A是TI公司的一款解码器/编码器/多路复用器产品，SN74AS298A是具有存储器的四路 2 输入 多路复用器，本页介绍了SN74AS298A的产品说明、应用、特性等，并给出了与SN74AS298A相关的TI元器件型号供参考。
SN74AS298A - 具有存储器的四路 2 输入 多路复用器 - 解码器/编码器/多路复用器 - 特殊逻辑 - TI公司（Texas Instruments，德州仪器）
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.
a1, a2, etc. = the level of steady-state input at A1, A2, etc. QA0, QB0, etc. = the level of QA, QB, etc. entered on the most recent transition of CLK
- 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
