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.