Bus Transceivers/Registers

Independent Registers and Enables for A and

B Buses

Multiplexed Real-Time and Stored Data

Choice of True and Inverting Data Paths

Choice of 3-State or Open-Collector

Outputs to A Bus

Dependable Texas Instruments Quality and

Reliability

description

These devices consist of bus transceiver circuits, D-type

flip-flops, and control circuitry arranged for multiplexed

transmission of data directly from the data bus or from

the internal storage registers. Enable GAB and GBA are

provided to control the transceiver functions. SAB and

SBA control pins are provided to select whether realtime

or stored data is transferred. A low input level selects

real-time data, and a high selects stored data. The

following examples demonstrate the four fundamental

bus-management functions that can be performed with

the 'LS651, 'LS652, and 'LS653.