N76E003AT20-T from Nuvoton Tech, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	P0.5/PWM2/IC6/T0/AIN4	bidirectional	Port 0 bit 5. Multiplexed with PWM output channel 2 (PWM2), input capture channel 6 (IC6), Timer 0 external count/toggle output (T0), and ADC input channel 4 (AIN4).
2	P0.6/TXD/AIN3	bidirectional	Port 0 bit 6. Multiplexed with UART0 transmit data output (TXD) and ADC input channel 3 (AIN3). TXD/RXD of UART0 are software swappable via UART0PX (AUXR1.2).
3	P0.7/RXD/AIN2	bidirectional	Port 0 bit 7. Multiplexed with UART0 receive data input (RXD) and ADC input channel 2 (AIN2).
4	P2.0/RST	input	P2.0 is a general-purpose port 2 bit 0 input when RPD (CONFIG0.2) is programmed as 0. Otherwise operates as active-low external reset (RST), a Schmitt-trigger input with internal pull-up that resets the device when driven low.
5	P3.0/INT0/OSCIN/AIN1	bidirectional	Port 3 bit 0 available when the internal oscillator is used as the system clock. Multiplexed with external interrupt 0 (INT0), external clock input (XIN/OSCIN) when ECLK mode enabled, and ADC input channel 1 (AIN1).
6	P1.7/INT1/AIN0	bidirectional	Port 1 bit 7. Multiplexed with external interrupt 1 (INT1) and ADC input channel 0 (AIN0).
7	GND	power_in	Ground reference (0 V) for all supply and I/O domains.
8	P1.6/ICPDA/OCDDA/TXD_1/[SDA]	bidirectional	Port 1 bit 6. Multiplexed with In-Circuit Programming data (ICPDA), On-Chip Debugger data (OCDDA), UART1 transmit output (TXD_1), and optional I2C data (SDA) when I2C alternate-pin remapping is selected.
9	VDD	power_in	Positive supply voltage. Operating range 2.4 V to 5.5 V for core and I/O.
10	P1.5/PWM5/IC7/SS	bidirectional	Port 1 bit 5. Multiplexed with PWM output channel 5 (PWM5), input capture channel 7 (IC7), and SPI slave-select input (SS, active low).
11	P1.4/SDA/FB/PWM1	bidirectional	Port 1 bit 4. Multiplexed with default I2C data (SDA), PWM Fault-Brake input (FB), and PWM output channel 1 (PWM1).
12	P1.3/SCL/[STADC]	bidirectional	Port 1 bit 3. Multiplexed with default I2C clock (SCL) and optional external ADC start trigger input (STADC) when STADC remap is selected.
13	P1.2/PWM0/IC0	bidirectional	Port 1 bit 2. Multiplexed with PWM output channel 0 (PWM0) and input capture channel 0 (IC0).
14	P1.1/PWM1/IC1/AIN7/CLO	bidirectional	Port 1 bit 1. Multiplexed with PWM output channel 1 (PWM1), input capture channel 1 (IC1), ADC input channel 7 (AIN7), and system clock output (CLO).
15	P1.0/PWM2/IC2/SPCLK	bidirectional	Port 1 bit 0. Multiplexed with PWM output channel 2 (PWM2), input capture channel 2 (IC2), and SPI clock (SPCLK).
16	P0.0/PWM3/IC3/MOSI/T1	bidirectional	Port 0 bit 0. Multiplexed with PWM output channel 3 (PWM3), input capture channel 3 (IC3), SPI MOSI (master output/slave input), and Timer 1 external count/toggle output (T1).
17	P0.1/PWM4/IC4/MISO	bidirectional	Port 0 bit 1. Multiplexed with PWM output channel 4 (PWM4), input capture channel 4 (IC4), and SPI MISO (master input/slave output).
18	P0.2/ICPCK/OCDCK/RXD_1/[SCL]	bidirectional	Port 0 bit 2. Multiplexed with In-Circuit Programming clock (ICPCK), On-Chip Debugger clock (OCDCK), UART1 receive input (RXD_1), and optional I2C clock (SCL) when I2C remap is selected.
19	P0.3/PWM5/IC5/AIN6	bidirectional	Port 0 bit 3. Multiplexed with PWM output channel 5 (PWM5), input capture channel 5 (IC5), and ADC input channel 6 (AIN6).
20	P0.4/AIN5/STADC/PWM3/IC3	bidirectional	Port 0 bit 4. Multiplexed with ADC input channel 5 (AIN5), default external ADC start trigger (STADC), PWM output channel 3 (PWM3), and input capture channel 3 (IC3).

Key specifications

Parameter	Value
Manufacturer	Nuvoton Tech
Package	TSSOP-20
Category	MCU
Pins	20

Ordering variants

Same part, different packaging or reel option.

N76E003AT20-T
N76E003AT20-TAS20
N76E003AT20-TAQ20
N76E003AT20-TBQ20
N76E003AT20-TCQ20

CAD (KiCad official)

Symbol: N76E003AT20-T
Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
3D model: TSSOP-20 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`n76e003at20-t.step`	267 KB	You want the bare part, or you mark your own boards.
`n76e003at20-t-etched.step`	3.0 MB	You want the part with `N76E003AT20-T` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 754 faces against 327 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Nuvoton Tech datasheet (276 pp, sha256 3f20216500ad7679, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF