The NXP LPC1342FBD48151 is a 32-bit ARM Cortex-M3 microcontroller running at 72 MHz, with 16 KB of Flash program memory and 4 KB of SRAM. It integrates a USB full-speed device controller alongside I²C, SPI, SSP, UART/USART, and Microwire serial interfaces, plus an 8-channel 10-bit ADC. The part is rated for the industrial temperature range of -40°C to 85°C and operates from a 2 V to 3.6 V supply. It comes in a 48-LQFP (7×7 mm) surface-mount package with 42 general-purpose I/O lines.
72 MHz Cortex-M3 — throughput for USB and control loops
The 72 MHz core clock on this Cortex-M3 delivers enough headroom for single-cycle multiply and bit-banding operations typical in USB polling loops and sensor-fusion algorithms. The 16 KB Flash and 4 KB RAM limit firmware to compact, single-purpose applications — think USB-to-serial bridges, keypad controllers, or simple data loggers — not multitasking RTOS stacks.
The 42 I/O lines include USB D+/D−, multiple serial ports, and ADC inputs.