SN74AS298A数据手册集成电路（IC）的信号开关多路复用器解码器规格书PDF

描述 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.  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

特性 Features

• 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