SCANSTA111MT-TI

Specialized Overview

The SCANSTA111MT-TI is an Enhanced SCAN Bridge Multidrop Addressable IEEE 1149.1 (JTAG) Port manufactured by Texas Instruments. It extends the standard test bus into a multidrop environment, supporting up to 3 local IEEE 1149.1 scan rings accessible individually or combined serially. The device features 7 slot inputs enabling up to 121 unique addresses, plus broadcast and multicast capabilities. It operates on a 3.0V to 3.6V supply voltage within a -40°C to +85°C temperature range. Key internal components include a 32-bit TCK counter, a 16-bit LFSR signature compactor, and configurable local scan ports with transparent mode for backplane buffering.

Specialized Feature Summary

• Supports hierarchical and multidrop addressing for improved test throughput and board removal without losing access to remaining modules
• Provides three IEEE 1149.1-compatible configurable local scan ports with bypass, insertion, or serial grouping options
• Enables transparent mode to buffer backplane pins to local scan ports via a single instruction
• Includes general-purpose pass-through bits for FPGA programming pulses and status monitoring

Specialized Applications

• Multidrop JTAG test bus environments requiring hierarchical addressability
• Systems needing live insertion or withdrawal of boards while retaining test access
• Analog bus support utilizing LSP active outputs for IEEE 1149.4 compatibility

Specialized Procurement Notes

Verify the specific suffix 'MT' against official Texas Instruments documentation to confirm package type and tape-and-reel specifications. Confirm current lifecycle status as NRND (Not Recommended for New Designs) before procurement planning. Ensure compliance with humidity sensitivity ratings and storage conditions specified in the datasheet. Validate that the intended application supports the 3.0V to 3.6V operating voltage range.

Specialized Selection Notes

Select this component when a multidrop JTAG architecture is required rather than a single serial chain. It is suitable for designs needing independent access to multiple local scan rings or combined serial groups. Consider the 49-pin nFBGA package constraints and the 3.0-3.6V power supply requirements during system design.

Specialized Part Context

This part belongs to the SCANSTA111 series of specialized interface ICs designed for boundary scan applications. It complements other Texas Instruments boundary scan controllers by providing bridge functionality for complex multidrop topologies. The device integrates with standard JTAG infrastructure to facilitate testing of large-scale systems.

Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Verify if SCANSTA111SMX or SCANSTA111SMX/NOPB serve as functional equivalents based on package and suffix differences.