MS51FB9AE 8-bit 8051 Microcontroller – 16KB Flash – TSSOP-20 – Nuvoton

Datasheet

The MS51FB9AE from Nuvoton is a high-performance, low-power 8-bit microcontroller based on the enhanced 1T 8051 CPU core, delivering efficient instruction execution and improved processing throughput. Designed for modern embedded applications, this MCU combines 16 KB Flash, 1 KB SRAM, and loader ROM for ISP support, making it an excellent choice for compact, cost-sensitive system designs.

Operating at speeds up to 24 MHz, the MS51FB9AE supports a wide 2.4V to 5.5V operating range, enabling easy integration with both low-voltage and 5V systems. With 18 programmable GPIO pins, it offers flexible connectivity for sensors, displays, communication modules, and motor drivers.

Integrated peripherals include I²C, SPI, two UART ports, a high-resolution 8-channel 12-bit ADC, and six 16-bit PWM channels, providing robust functionality for industrial control, consumer electronics, IoT devices, instrumentation, and automation projects. The MCU is specified to operate reliably across an extended –40°C to +105°C industrial temperature range.

Packaged in a compact 20-pin TSSOP, the MS51FB9AE is ideal for space-constrained PCB layouts and high-volume production designs.

Key Specifications:

• Manufacturer: Nuvoton

• Part Number: MS51FB9AE

• CPU Core: 8-bit 1T 8051-based

• Max Clock Speed: 24 MHz

• Flash Memory: 16 KB

• SRAM: 1 KB

• EEPROM / Loader: 4 KB loader ROM (ISP)

• Operating Voltage: 2.4V to 5.5V

• I/O Pins: 18 GPIOs

• Peripherals:
  – I²C, SPI
  – 2× UART
  – 8-channel 12-bit ADC
  – 6× 16-bit PWM

• Operating Temp: –40°C to +105°C

• Package: TSSOP-20 (surface-mount)

Package Includes:
1 x MS51FB9AE 8-bit Microcontroller

Note: Image is for representation purpose only.