The NXP LPC11U68JBD64K is a 32-bit ARM Cortex-M0+ MCU from the LPC11Uxx series, clocked at 50 MHz with 256 KB Flash program memory, 36 KB RAM, and 4 KB EEPROM. The part operates from 2.4 V to 3.6 V across the industrial temperature range of -40°C to 105°C, housed in a 64-LQFP (10x10 mm) surface-mount package. Typical applications include USB-enabled embedded control, human-machine interfaces, sensor hubs, and industrial I/O modules where a balance of processing throughput, memory, and peripheral integration is needed without moving to a higher-power Cortex-M3 or M4 core.
The 50 MHz Cortex-M0+ delivers single-cycle multiply and a two-stage pipeline, so interrupt latency stays tight for time-critical tasks like USB packet handling or PWM update. With 256 KB Flash and 36 KB RAM, firmware can hold a USB stack, a Modbus RTU bridge, and a local control loop without external memory. The 4 KB EEPROM is useful for calibration constants or configuration parameters that survive a firmware update — no separate serial EEPROM needed on the BOM.
Footprint and supply — 64-LQFP with 48 I/O
The 48 I/O lines include up to 10 ADC inputs and a full-speed USB port with integrated PHY.