SN74LVT8996PW

Specialty Logic Overview

The SN74LVT8996PW is a 3.3V, 10-bit addressable scan port (ASP) and multi-drop addressable IEEE Std 1149.1 (JTAG) TAP transceiver manufactured by Texas Instruments. It operates within a supply voltage range of 2.7 V to 3.6 V and supports an operating temperature range from -40 °C to +85 °C. The device is housed in a 24-pin Thin Shrink Small-Outline Package (TSSOP). It provides high drive outputs with capabilities of -32 mA for high-level output current and 64 mA for low-level output current.

Specialty Logic Feature Summary

• Supports IEEE Std 1149.1 (JTAG) test access port protocols for boundary scan testing
• Enables multi-drop addressing with a 10-bit address space allowing up to 1021 user-specified board addresses
• Provides 5V tolerance on both main and auxiliary TAP signals when powered at 3.3V
• Includes dedicated global addresses for disconnect, reset, and test synchronization functions

Specialty Logic Applications

• Complex circuit component testing via boundary scan architectures
• Extending scan access scope beyond board level to module-level interconnects
• Routing JTAG signals in multi-drop configurations to overcome ring and star topology limitations
• Interfacing between 3.3V devices and 5V host or target equipment in mixed-voltage systems

Specialty Logic Procurement Notes

Verify the package type corresponds to the PW suffix, indicating a 24-pin TSSOP. Confirm the operating temperature grade matches industrial requirements (-40°C to +85°C). Ensure the design accounts for the specific 10-bit addressing scheme and required control signals such as PTRST and PTDATA. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Specialty Logic Selection Notes

Select this component when designing systems requiring scalable JTAG daisy-chaining across multiple modules without complex external logic. It is suitable for applications needing voltage translation between 3.3V internal logic and 5V external interfaces. Consider the 24-pin TSSOP footprint constraints during PCB layout. Evaluate the need for its specific global address features versus simpler pass-through transceivers.

Specialty Logic Part Context

This part belongs to the Texas Instruments SCOPE family of specialty function logic ICs designed specifically for testability. It complements other boundary scan components by providing the connectivity layer necessary for hierarchical testing structures. The device integrates address decoding and signal buffering to manage complex test data paths efficiently.

Specialty Logic Replacement Considerations

The SN54LVT8996 serves as the military-grade equivalent with extended temperature ranges. For commercial replacements, verify compatibility with the SN74ABT8996 series, noting potential differences in drive strength and power consumption characteristics between LVT and ABT technologies.