SCANSTA111SMX

Specialized Overview

The SCANSTA111SMX is an enhanced SCAN bridge multidrop addressable IEEE 1149.1 (JTAG) port manufactured by Texas Instruments. It supports up to 121 unique addresses via seven slot inputs and provides three configurable local scan ports. The device operates on a 3.0V to 3.6V supply with a maximum operating current of 1.65 mA. It functions within a temperature range of -40°C to +85°C and is housed in a 49-pin nFBGA package. Key internal features include a 32-bit TCK counter and a 16-bit LFSR signature compactor for test data analysis.

Specialized Feature Summary

• Supports hierarchical and multidrop addressing for improved test throughput
• Provides transparent mode to buffer backplane pins to local scan ports
• Enables tri-state control of local taps for alternate test master access

Specialized Applications

• Multidrop JTAG test bus environments
• Board-level boundary scan testing systems
• FPGA programming pulse delivery

Specialized Procurement Notes

Verify the NRND status before integration, as this designation indicates the component is not recommended for new designs. Confirm that the SMX suffix aligns with required reel packaging specifications. Ensure compliance with humidity sensitivity handling protocols during assembly. Validate that the 49-pin nFBGA footprint matches the target PCB layout constraints.

Specialized Selection Notes

Select this component when a multidrop JTAG architecture is required to isolate board failures without disrupting the entire test chain. It is suitable for designs needing independent access to multiple local scan rings. Consider the 49-pin nFBGA package size and the specific 3.0V to 3.6V voltage requirements against available system power rails.

Specialized Part Context

This part belongs to the SCANSTA111 series of specialized interface ICs designed for IEEE 1149.1 compliance. It extends standard JTAG capabilities into complex multidrop configurations. The device facilitates efficient testing in systems where removing a module must not compromise access to remaining hardware.

Specialized Replacement Considerations

The SCANSTA111SMX/NOPB is a verified equivalent variant offering lead-free construction. Verify pin compatibility and electrical parameters remain identical before substitution.