LM3S8938-IQC50-A2T

Microcontrollers Overview

The LM3S8938-IQC50-A2T is a 32-bit ARM Cortex-M3 microcontroller from the Texas Instruments Stellaris family. It features a 50 MHz maximum clock frequency, 128 kB of flash program memory, and 64 kB of data RAM. The device operates within a voltage range of 2.25 V to 2.75 V and includes an integrated 10/100 MAC PHY for Ethernet connectivity. It provides 52 general-purpose I/O pins and supports multiple communication interfaces including CAN, I2C, SPI, SSI, and UART. The component is housed in a 100-pin LQFP package with an operating temperature range of -40°C to +85°C.

Microcontrollers Feature Summary

• Integrates a 10/100 Ethernet MAC and physical layer transceiver for networked applications
• Includes an ARM Cortex-M3 processor core with hardware multiply and divide capabilities
• Supports multiple serial communication protocols such as CAN, I2C, SPI, and UART
• Features built-in analog-to-digital conversion and timer/counters

Microcontrollers Applications

• Industrial control systems requiring Ethernet connectivity
• Smart metering and utility infrastructure devices
• Building automation and home networking equipment
• Medical instrumentation with network monitoring capabilities

Microcontrollers Procurement Notes

Verify the specific suffix A2T against official datasheets to confirm packaging type and moisture sensitivity level. Confirm lifecycle status as discontinued or NRND before finalizing designs. Ensure compatibility with existing firmware libraries for the Stellaris architecture. Check for RoHS compliance documentation if required by regional regulations.

Microcontrollers Selection Notes

Select this component when both high-speed Ethernet connectivity and robust industrial-grade processing are required. The integrated PHY reduces external component count compared to solutions using separate controllers. Consider the 128 kB flash size for application complexity and the 50 MHz speed for real-time performance requirements. Evaluate pin availability against system interface needs.

Microcontrollers Part Context

This part belongs to the Texas Instruments Stellaris LM3S series, designed for embedded applications needing reliable connectivity. The LM3S8938 variant specifically targets cost-sensitive Ethernet-enabled devices. It shares architectural similarities with other Stellaris parts but distinguishes itself through the inclusion of the on-chip Ethernet PHY and specific memory configuration.

Microcontrollers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify cross-references with Texas Instruments directly.