SN74ABT657ANT

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ABT657ANT is an octal transceiver utilizing state-of-the-art EPIC-II BiCMOS technology. It integrates eight noninverting buffers with parity generator and checker circuits, featuring three-state outputs. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. Key electrical characteristics include high-drive outputs capable of sourcing -32 mA and sinking 64 mA. Propagation delays are typically 4.2 ns for data paths and 6.3 ns for parity generation.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Integrates parity generator and checker circuits for error detection in bidirectional data transmission.
• Features flow-through architecture designed to optimize printed circuit board layout efficiency.
• Maintains high-impedance state during power-up and power-down sequences to prevent bus contention.

Buffers, Drivers, Receivers, Transceivers Applications

• Bidirectional data buses requiring integrated parity checking capabilities.
• High-performance memory systems utilizing parity-based error detection protocols.
• Industrial control networks necessitating robust signal integrity and low power dissipation.

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package suffix 'NT' corresponds to the required plastic DIP configuration. Confirm that the manufacturing lot meets the specified -40°C to +85°C operating temperature range. Ensure compatibility with standard TTL input levels and validate that the design accommodates the required pull-up resistor values for the output-enable pin during power transitions.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when bidirectional octal data transfer requires simultaneous parity generation or checking. The flow-through architecture is advantageous for minimizing trace lengths in dense PCB layouts. Consider the high-drive output capability for driving multiple loads or longer traces without additional buffering logic.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Texas Instruments SN74ABT series, which employs EPIC-II BiCMOS technology to achieve high speed while significantly reducing power dissipation compared to earlier generations. The ABT family provides enhanced performance metrics suitable for demanding digital logic applications requiring reliable data transmission and integrity verification.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ABT657ADW

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device determine the direction of data flow?

Data flow direction is controlled by the T/R input. A high level on T/R enables transmit mode (A to B), while a low level enables receive mode (B to A).

What is the function of the ERR output?

In receive mode, the ERR output indicates whether the received data exhibits the correct parity sense based on the ODD/EVEN selection and the PARITY input.