SN74ABT853DWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ABT853DWR is an octal bus transceiver with integrated parity generation and checking, manufactured using Texas Instruments' EPIC-II BiCMOS technology. It operates within a supply voltage range of 4.5 V to 5.5 V and supports data transfer between A and B buses. The device features high-drive outputs capable of -32 mA IOH and 64 mA IOL. Propagation delays are typically 4.8 ns from A/B to B/A and up to 13.3 ns for parity generation. It includes dedicated control inputs for output enable (OEA/OEB), latch enable (LE), and clear (CLR) to manage the open-collector error flag (ERR).

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Integrates an 8-bit to 9-bit parity generator and checker for communication bus integrity verification.
• Provides a latched open-collector parity-error flag (ERR) that can be sampled, stored, or cleared via control inputs.
• Features high-impedance state during power-up and power-down to prevent bus contention.
• Utilizes EPIC-II BiCMOS design to significantly reduce power dissipation while maintaining high drive capability.

Buffers, Drivers, Receivers, Transceivers Applications

• Communication interfaces requiring parity error detection between data buses.
• System diagnostic applications utilizing forced inverted parity conditions.
• High-speed digital logic circuits needing low-power octal bus buffering.

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'DWR' corresponds to the SOIC-24 package and tape-and-reel quantity of 2000 units. Confirm RoHS compliance status and lead finish details in the latest TI Package Option Addendum. Ensure the application environment remains within the specified -40°C to +85°C operating temperature range for the SN74 variant.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when bidirectional data transfer requires simultaneous parity bit generation on one direction and parity checking on the reverse. The inclusion of latch and clear controls allows for flexible error flag management in complex system architectures. Compare propagation delay specifications against system timing requirements to ensure compatibility with clock speeds.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74ABT series of BiCMOS logic devices, designed for high-speed operation with reduced power consumption. It serves as a specialized variant within the broader bus transceiver family, distinguished by its built-in parity logic capabilities rather than simple signal buffering.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ABT853DW: Identical function in tube packaging instead of tape-and-reel.

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle parity errors?

When data transfers from the B bus to the A bus, the device checks the parity. If an error is detected, the open-collector ERR output indicates the fault. This flag can be passed, sampled, stored, or cleared using the LE and CLR inputs.

What is the behavior of the ERR output during isolation?

When both OEA and OEB are high, the device is isolated. In this mode, if the parity check condition is met, the ERR output may show inverted parity of the A bus depending on the internal state.