ST8500TR

Telecom Overview

The ST8500TR is a fully programmable power-line communication (PLC) modem system-on-chip manufactured by STMicroelectronics. It integrates an ARM Cortex-M4F core operating at up to 200 MHz with a dedicated real-time engine running at 400 MHz for PLC PHY and MAC management. The device supports narrow-band PLC protocols including ITU G.9903 (G3-PLC) and ITU G.9904 (PRIME) within a frequency band up to 500 kHz. Key specifications include 256 kB embedded SRAM for code/data, 96 kB data SRAM, and 8 kB shared RAM. It features an integrated differential analog front-end, AES cryptographic engine, and interfaces such as SPI, I2C, and UART. The component operates on 1.1 V digital and 3.3 V analog supplies, housed in a 56-VFQFN package.

Telecom Feature Summary

• Fully programmable architecture supporting multiple narrow-band PLC protocol standards
• Integrated high-performance dual-core design with dedicated real-time engine
• Complete analog front-end with automatic gain control and zero-crossing detection
• Built-in hardware security engines for encryption and random number generation

Telecom Applications

• Smart metering and utility grid automation systems
• Home automation and building management networks
• Industrial control and monitoring applications requiring PLC connectivity

Telecom Procurement Notes

Verify the specific ordering suffix to ensure correct packaging configuration, such as tape and reel quantities. Confirm that the procurement source provides original manufacturer documentation or authorized distribution channels to guarantee component authenticity. Check for moisture sensitivity level requirements during storage and handling procedures prior to assembly.

Telecom Selection Notes

Select this component when a flexible, software-defined PLC solution is required to support evolving protocol standards without hardware changes. Ensure the application design accommodates the dual power supply requirements of 1.1 V for digital logic and 3.3 V for I/O and analog circuits. Verify that the host system can utilize the available serial interfaces for firmware updates and peripheral control.

Telecom Part Context

The ST8500TR belongs to the ST85 series of programmable PLC modems from STMicroelectronics. This series is designed to replace fixed-function PLC chips by offering software-upgradable capabilities. The 'TR' suffix typically denotes the tape and reel packaging variant used for automated surface-mount assembly processes.

Telecom Replacement Considerations

Direct pin-to-pin replacements are limited due to the unique SoC architecture. Alternative solutions may require significant schematic and firmware redesign. Consult official substitution lists for compatible variants within the ST85 family.