SN74ABT18640DLR

Specialty Logic Overview

The SN74ABT18640DLR is an 18-bit inverting bus transceiver with integrated boundary-scan test circuitry, conforming to IEEE Standard 1149.1-1990. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an industrial temperature range from -40°C to +85°C. The device utilizes BiCMOS technology for reduced power dissipation and is housed in a 56-pin SSOP package.

Specialty Logic Feature Summary

• Integrates 18-bit inverting bus transceivers with independent direction control and output enable inputs for each 9-bit section.
• Includes a 4-wire Test Access Port (TAP) interface supporting standard boundary-scan operations and proprietary SCOPE instructions.
• Features parallel-signature analysis and pseudo-random pattern generation capabilities via the boundary-control register.

Specialty Logic Applications

• Boundary-scan testing of complex printed-circuit-board assemblies
• In-system testing utilizing the JTAG test access port architecture
• High-speed data transmission between buses using inverting logic

Specialty Logic Procurement Notes

Verify the specific suffix 'DLR' corresponds to the SSOP-56 plastic shrink small-outline package configuration. Confirm that the component meets RoHS compliance standards as indicated by manufacturer documentation. Ensure the operating environment remains within the specified -40°C to +85°C temperature limits for reliable performance.

Specialty Logic Selection Notes

Select this component when designing systems requiring both high-speed bidirectional data transfer and comprehensive board-level testability. The integration of boundary-scan logic eliminates the need for external test controllers. Verify compatibility with existing IEEE 1149.1 infrastructure before implementation.

Specialty Logic Part Context

This device belongs to the Texas Instruments SCOPE family of testability products and the Widebus family. It is part of the SN54/74ABT series, which utilizes state-of-the-art EPIC-II BiCMOS design. The SN74 variant is distinguished from the SN54 military-grade version by its commercial temperature rating.

Specialty Logic Replacement Considerations

SN54ABT18640WDG