74ABT899CQCX

Overview

The Fairchild Semiconductor 74ABT899CQCX is a 9-bit parity transceiver with transparent latches, belonging to the 74ABT logic family. It operates on a single 4.5V to 5.5V supply and supports data transfer in both directions across an 8-bit bus while generating or checking parity for the ninth bit. The device integrates transparent latches to capture data independently of the transceiver direction control. It is housed in a 28-SSOP package and is rated for operation within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates 9-bit parity generation and checking capabilities alongside transparent latch functionality
• Supports bidirectional data transfer across an 8-bit bus with independent parity handling
• Features high-speed CMOS technology optimized for low power consumption and fast switching

Applications

• High-speed memory interface systems requiring data integrity verification
• Parallel communication buses utilizing parity error detection
• Data acquisition systems needing buffered storage with parity monitoring

Procurement Notes

Verify the specific suffix 'CQCX' against official NXP or ON Semiconductor documentation to confirm package type and tape/reel specifications. Ensure compatibility with existing board layouts regarding the SSOP footprint. Confirm RoHS compliance status through current manufacturer certificates as product lines may transition between legacy Fairchild branding and current NXP/ON Semiconductor standards.

Selection Notes

Select this component when system architecture requires simultaneous data buffering and parity checking without external logic gates. Consider the 74ABT series characteristics for speed and power balance compared to standard 74F or 74HC families. Verify that the 28-pin SSOP package fits the available PCB real estate and thermal constraints of the final assembly design.

Part Context

This part belongs to the 74ABT family of advanced BiCMOS logic devices originally developed by Fairchild Semiconductor. Following corporate acquisitions, these products are now managed under NXP USA Inc. or ON Semiconductor. The 74ABT899 serves as a specialized solution for parallel data paths where error detection is critical, bridging the gap between simple buffers and complex protocol controllers.

Replacement Considerations

Check for direct equivalents such as the 74ABT899D variants from NXP. Verify pinout compatibility before substituting with other 9-bit parity transceivers from different manufacturers.