74ACT16657DL

Buffers, Drivers, Receivers, Transceivers Overview

The Texas Instruments 74ACT16657DL is a 16-bit transceiver featuring integrated parity generators and checkers with 3-state outputs. It contains two noninverting octal transceiver sections, each equipped with separate parity control circuits. The device utilizes the Widebus architecture to optimize PCB layout and includes distributed VCC and GND pins to minimize high-speed switching noise. It operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL-voltage compatible inputs.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Integrates dual octal transceivers with dedicated odd/even parity generation and checking logic for data integrity verification.
• Features flow-through architecture and distributed power/ground pin configurations to reduce switching noise and improve layout efficiency.
• Provides bidirectional data flow control via independent transmit/receive inputs and high-impedance output enable controls.

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed bus interfaces requiring parity error detection
• Data transmission systems utilizing widebus architectures
• Memory interface circuits with built-in data validation

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package variant (DL) against the required footprint dimensions. Confirm RoHS compliance status and lead finish specifications for soldering compatibility. Ensure the operating temperature range meets the environmental requirements of the target application design.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems that require simultaneous data transfer and parity checking without external logic. Consider the 56-pin SSOP package constraints and the 4.5 V to 5.5 V supply voltage requirement. Evaluate the propagation delay characteristics against the system clock speed to ensure timing margins are met.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74ACT logic family, utilizing EPIC technology for enhanced performance. It is part of the Widebus family, designed to provide higher I/O density in standard small-outline packages compared to traditional logic families.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Check datasheets for SN74ACT16657 or 54ACT16657 variants to confirm functional equivalence and temperature range suitability before substitution.

Buffers, Drivers, Receivers, Transceivers FAQ

How is the parity direction determined?

In transmit mode, the parity generator calculates the bit value based on the input bus. In receive mode, the checker compares the received parity bit against the calculated value to set the ERR output.

What determines the data flow direction?

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