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MS51BA9AE

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Nuvoton Tech Microcontroller Units (MCUs/MPUs/SOCs), MSOP-10(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MS51BA9AE

Nuvoton Tech · Microcontroller Units (MCUs/MPUs/SOCs) · MSOP-10(3x3)

MS51BA9AE from Nuvoton Tech, in a MSOP-10(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 P0.6 bidirectional Port 0 bit 6 GPIO, multiplexed with ADC_CH3 (ADC input channel 3) and UART0_TXD (serial port 0 transmit data output).
2 nRESET input nRESET is a Schmitt trigger active-low hardware reset input with internal pull-up (10 kΩ pull-up and 10 uF capacitor recommended), also usable as P2.0 input when RPD (CONFIG0.2) is 0 and as UART0_RXD receive input.
3 VSS power_in Ground potential.
4 P1.6 bidirectional Port 1 bit 6 GPIO, multiplexed with ICE_DAT (ICP/ICE data input or output, 100 kΩ pull-up recommended), UART1_TXD and remappable [I2C0_SDA].
5 VDD power_in Supply voltage VDD for operation.
6 P0.1 bidirectional Port 0 bit 1 GPIO, multiplexed with ADC_CH7, PWM0_CH4, SPI0_MISO, IC4 and CLKO (clock output).
7 P0.2 bidirectional Port 0 bit 2 GPIO, multiplexed with ICE_CLK (ICP clock input, 100 kΩ pull-up recommended), PWM0_CH0, UART1_RXD, IC0 and remappable [I2C0_SCL].
8 P0.3 bidirectional Port 0 bit 3 GPIO, multiplexed with ADC_CH6, PWM0_CH5, I2C0_SCL, IC5 and remappable [STADC] external ADC start trigger.
9 P0.4 bidirectional Port 0 bit 4 GPIO, multiplexed with ADC_CH5, PWM0_CH3, PWM0_BRAKE fault brake input, I2C0_SDA, IC3 and STADC external ADC start trigger.
10 P0.5 bidirectional Port 0 bit 5 GPIO, multiplexed with ADC_CH4, PWM0_CH2, SPI0_SS slave select input, IC6 and T0 external count input/toggle output of Timer/Counter 0.

Key specifications

Parameter Value
Manufacturer Nuvoton Tech
Package MSOP-10(3x3)
Category Single Chip Microcomputer/Microcontroller
Pins 10

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Operating temperature TA -40 105 ℃ 36
Operation voltage VDD 2.4 5.5 V VDD-VSS = 2.4 ~ 5.5V, TA = 25C, Fsys = 16 MHz 36
Band-gap voltage VBG 1.17 1.22 1.3 V TA = 25 °C 36
Band-gap voltage VBG 1.14 1.33 V TA = -40°C ~105 °C 36
Normal run current, 24 MHz HIRC IDD_RUN 3.6 4.2 mA 24 MHz(HIRC) @5.5V, TA = 25 °C typ; max at TA = -40 °C 37
Normal run current, 16 MHz HIRC IDD_RUN 3.3 3.4 mA 16 MHz (HIRC) @5.5V, TA = 25 °C typ; max at TA = -40 °C 37
Normal run current, 10 kHz LIRC IDD_RUN 0.3 0.32 mA 10 kHz (LIRC), max at TA = -40 °C 37
Idle current, 24 MHz HIRC IDD_IDLE 2.8 2.9 mA 24 MHz(HIRC) @5.5V, TA = 25 °C 38
Idle current, 16 MHz HIRC IDD_IDLE 2.2 2.5 mA 16 MHz (HIRC) @5.5V, TA = 25 °C 38
Power down current IDD_PD 6.5 6.2 µA Power down mode, all peripherals disable @5.5V; max column TA = -40 °C 38
Power down current, TA=105C IDD_PD 55 µA Power down mode, all peripherals disable, TA = 105 °C 38
Wakeup from IDLE mode tWU_IDLE 5 6 cycles 16 MHz HIRC 39
Wakeup from Power down mode tWU_NPD 30 µs Fsys = HIRC @16MHz 39
Input low voltage (TTL) VIL -0.3 0.2 V min VSS-0.3, max 0.2VDD-0.1 40
Input low voltage VIL1 0 0.3 V max 0.3*VDD 40
Input high voltage VIH 0.9 0.3 V min 0.2VDD+0.9, max VDD+0.3 40
Input high voltage (Schmitt and Xin) VIH1 0.7 1 V min 0.7*VDD, max VDD 40
Input leakage current ILK -1 1 µA VSS < VIN < VDD, Open-drain or input only mode 40
Source current push-pull high ISR -9 -9.6 mA VDD = 5.5 V, VIN =(VDD-0.4) V 41
Source current push-pull high ISR -6 -6.6 mA VDD = 3.3 V, VIN =(VDD-0.4) V 41
Sink current push-pull low ISK 18 20 mA VDD = 5.5 V, VIN = 0.4 V 41
Sink current push-pull low ISK 16 18 mA VDD = 3.3 V, VIN = 0.4 V 41
Sink current push-pull low ISK 9.7 11 mA VDD = 2.4 V, VIN = 0.4 V 41
I/O pin capacitance CIO 5 pF 41
nRESET negative going threshold VILR 0.3 V 0.3*VDD 42
nRESET positive going threshold VIHR 0.7 V 0.7*VDD 42
Internal nRESET pull up resistor RRST 45 60 KΩ VDD = 5.5 V 42
Internal nRESET pull up resistor RRST 45 65 KΩ VDD = 2.4 V 42
HIRC frequency drift FHRC -1 1 % TA = 25 °C, VDD = 3.3V 43
HIRC frequency drift FHRC -2 2 % TA = -20C ~ +105 °C, VDD = 2.4 ~ 5.5V 43
HIRC frequency drift FHRC -4 4 % TA = -40C ~ -20 °C, VDD = 2.4 ~ 5.5V 43
HIRC operating current IHRC 490 550 µA 43
HIRC stable time TS 3 5 µs TA = -40C ~ +105 °C, VDD = 2.4 ~ 5.5V 43
LIRC frequency drift FLRC -10 10 % TA = 25 °C, VDD = 5V 46
LIRC frequency drift FLRC -35 35 % TA=-40~105°C Without software calibration 46
LIRC operating current ILRC 0.85 1 µA VDD = 3.3V 46
POR reset voltage VPOR 1 1.15 1.3 V 48
LVR reset voltage VLVR 1.7 2 2.4 V 48
BOD brown-out detect voltage VBOD 4.25 4.4 4.55 V BOV[1:0] = [0,0] 48
BOD brown-out detect voltage VBOD 3.55 3.7 3.85 V BOV[1:0] = [0,1] 48
BOD brown-out detect voltage VBOD 2.6 2.7 2.8 V BOV[1:0] = [1,0] 48
BOD brown-out detect voltage VBOD 2.1 2.2 2.35 V BOV[1:0] = [1,1] 48
Flash supply voltage VFLA 1.62 1.8 1.98 V TA = 25℃ 52
Flash endurance NENDUR 100000 cycles TJ = -40℃~125℃ 52
DC power supply VDD-VSS -0.3 6.5 V 53
Input voltage on I/O VIN -0.3 5.5 V min VSS-0.3 53
Maximum current into VDD ΣIDD 150 mA 53
Maximum current out of VSS ΣISS 150 mA 53
Maximum current sunk by a I/O pin IIO 22 mA 53
Maximum current sourced by a I/O pin IIO 10 mA 53
Operating junction temperature TJ -40 125 ℃ 54
Storage temperature TST -65 150 ℃ 54
Thermal resistance junction-ambient, 10-pin MSOP (3x3 mm) θJA 160 ℃/Watt 54
ESD human body model VHBM -8000 8000 V 55
ESD charge device model VCDM -1000 1000 V 55
Pin current for latch-up LU -400 400 mA 55

CAD (KiCad official)

  • Symbol: MS51BA9AE
  • Footprint: Package_SO:MSOP-10_3x3mm_P0.5mm
  • 3D model: MSOP-10(3x3) (KiCad packages3D, STEP)
  • 3D model files: ms51ba9ae-etched.step / ms51ba9ae-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ms51ba9ae.step / ms51ba9ae.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Nuvoton Tech datasheet (62 pp, sha256 72116ab91a69ab18, retrieved 2026-10-26, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF