Cortex-M4F at 120 MHz with integrated Ethernet and USB
The TM4C129EKCPDTI3R: 32-bit ARM Cortex-M4F MCU from Texas Instruments, clocked at 120 MHz. 512 KB Flash, 256 KB SRAM, 6 KB EEPROM on-chip. 128-TQFP package, 90 I/O, -40°C to 85°C.
The 256 KB SRAM handles packet buffers and control loops without external memory; the 6 KB EEPROM stores calibration constants and network parameters, eliminating an external serial EEPROM. The integrated Ethernet PHY saves a discrete PHY chip and its magnetics footprint, while the USB OTG host/device capability supports field firmware updates via USB stick or direct PC connection.
Lifecycle: last-time-buy window open — act now
The TM4C129EKCPDTI3R carries an EOL-hot lifecycle status, meaning the manufacturer has announced end-of-life and the last-time-buy window is active. Buyers should secure final-order quantities or begin qualification of a replacement. The base product number TM4C129 covers a family of pin-compatible density variants; for long-term supply, consider migrating to a currently active sibling within the same Tiva C portfolio.
Integration checklist
Supply range is 2.97 V to 3.63 V. Internal oscillator included. 128-TQFP (14x14 mm). 20-channel 12-bit ADC.