ATMEGA128L-8AU (Microchip (Atmel)) is a low-voltage 8-bit AVR microcontroller in a TQFP-64 package.

• 128 KB self-programmable Flash, 4 KB EEPROM and 4 KB SRAM
• 53 programmable I/O lines · 8-channel 10-bit ADC
• Dual USARTs, SPI, two-wire interface (TWI) and JTAG
• Up to 8 MHz · 2.7 V to 5.5 V operation · industrial range −40 °C to 85 °C

Data per Microchip (Atmel) ATmega128/ATmega128L datasheet.