MS51FB9AE-T Enhanced 1T 8051 Core 8-bit MCU 16KB Flash 24MHz TSSOP-20

MS51FB9AE-T Product Overview

The MS51FB9AE-T is an enhanced 8-bit 8051-core microcontroller from Nuvoton Technology, part of the NuMicro® MS51 series. Featuring a 1T operating mode with an instruction set fully compatible with standard 80C51 while delivering significantly enhanced performance, the MS51FB9AE-T is housed in a TSSOP-20 (4.4×6.5×0.9mm) package. The MS51FB9AE-T operates at up to 24MHz across a wide 2.4V to 5.5V voltage range with an industrial temperature range of -40°C to +105°C. The MS51FB9AE-T integrates 16KB Flash (APROM), 1KB SRAM, and an additional 1KB on-chip auxiliary RAM (XRAM), with configurable 4K/3K/2K/1KB LDROM region. With rich peripherals including 18 GPIO, 8-channel 12-bit ADC (500KSPS), 6×16-bit PWM, 2 UART, 1 SPI, and 1 I2C, the MS51FB9AE-T provides a cost-effective embedded control solution for LED lighting, home appliances, industrial control, motor control, battery management, and wireless charging applications.

MS51FB9AE-T Typical Applications

LED lighting control and dimming drivers with the MS51FB9AE-T

Wireless chargers and battery management systems based on the MS51FB9AE-T

Home appliance control (small appliances, smart plugs) using the MS51FB9AE-T

Industrial automation and sensor nodes powered by the MS51FB9AE-T

Motor control (with PWM Fault Brake function) implemented by the MS51FB9AE-T

Switching power supplies and adapters designed with the MS51FB9AE-T

Electric toothbrush and personal care devices featuring the MS51FB9AE-T

FAQ

Q: What advantage does the 1T architecture offer over traditional 8051?
A: Conventional 80C51 requires 12 clocks per machine cycle, while the MS51FB9AE-T's 1T architecture needs only one clock, delivering 12× faster instruction execution. At the same 24MHz frequency, actual computing performance far exceeds traditional 8051.

Q: Does it support ISP in-system upgrade?
A: Yes. The MS51FB9AE-T includes configurable 4KB LDROM (configurable to 4K/3K/2K/1KB) for ISP boot code. It supports ICP and ISP via UART for field firmware updates.

Q: Is it pin-compatible with the N76E003AT20?
A: Yes. In the TSSOP-20 package, the MS51FB9AE-T is fully pin-compatible with the N76E003AT20, enabling hardware pin-to-pin replacement with enhanced software performance. The programming tool must be updated to ICP V3.01.6951 or later.

Q: What are the clock system features?
A: The MS51FB9AE-T supports 3 clock sources: external clock input, 24MHz/16MHz high-speed internal oscillators (factory-calibrated, ±1% at VDD=5.0V), and 10kHz low-speed internal oscillator (±2% factory accuracy). All clock sources support on-the-fly software switching without reset for flexible power-performance balance.

Q: What are the PWM output features?
A: The MS51FB9AE-T includes a 16-bit PWM generator outputting 6× 16-bit PWM channels with ADC capture function and configurable dead-time, plus Fault Brake function - ideal for motor control and power management applications.

Q: What is the packaging method?
A: The MS51FB9AE-T uses tape & reel packaging with a standard of 2500 units per full reel, suitable for automated SMT production and efficient feeder loading.

Q: Is an evaluation board available?
A: Yes. For the MS51FB9AE-T, Nuvoton offers the NuTiny-MS51FB evaluation board consisting of a NuMicro® 8051 MS51FB9AE platform and an onboard Nu-Link-Me debugger/programmer, with full-pin extension connectors. Together with Keil C51, IAR development environments, and NuMicro ICP Programming Tool, it enables rapid evaluation and embedded application development.

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