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N79E815AT20

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Nuvoton Tech Microcontroller Units (MCUs/MPUs/SOCs), TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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N79E815AT20

Nuvoton Tech · Microcontroller Units (MCUs/MPUs/SOCs) · TSSOP-20

N79E815AT20 from Nuvoton Tech, in a TSSOP-20. 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 P0.0 bidirectional Port 0 bit 0 I/O with alternate functions PWM3 output, KB0 keyboard input and SPICLK (SPI-1 clock).
2 P1.7 bidirectional Port 1 bit 7 I/O with alternate functions PWM2 output, ICPCLK (ICP clock) and MOSI (SPI-1); 38 mA LED drive capability.
3 P1.6 bidirectional Port 1 bit 6 I/O with alternate functions PWM1 output, ICPDAT (ICP data) and MISO (SPI-1); 38 mA LED drive capability.
4 /RST input Active-low Schmitt-trigger reset input with about 200 kohm internal pull-up; must not float, datasheet requires a 100 ohm resistor and 10 uF capacitor to ground.
5 VSS power_in Ground.
6 P3.1 bidirectional Port 3 bit 1 I/O, alternate function XTAL1 external crystal/clock input.
7 P3.0 bidirectional Port 3 bit 0 I/O, alternate functions XTAL2 (crystal amplifier output) and CLKOUT (internal RC oscillator/4 output).
8 P1.4 bidirectional Port 1 bit 4 I/O with alternate functions /INT1 external interrupt, STADC ADC start trigger and /SS (SPI-1 slave select); 38 mA LED drive capability.
9 P1.3 bidirectional Port 1 bit 3, always open-drain, with alternate functions /INT0 external interrupt and SDA (I2C data).
10 P1.2 bidirectional Port 1 bit 2, always open-drain, with alternate functions T0 timer 0 external input, SCL (I2C clock) and IC0 capture input.
11 P1.1 bidirectional Port 1 bit 1 I/O with alternate function RXD (UART receive); 38 mA LED drive capability.
12 P1.0 bidirectional Port 1 bit 0 I/O with alternate function TXD (UART transmit); 38 mA LED drive capability.
13 P0.7 bidirectional Port 0 bit 7 I/O with alternate functions T1 timer 1 external input, ADC6 analog input, KB7 keyboard input and IC1 capture input.
14 P0.6 bidirectional Port 0 bit 6 I/O with alternate functions ADC5 analog input and KB6 keyboard input.
15 VDD power_in Supply voltage input; operating range 2.4 V to 5.5 V depending on clock source and frequency.
16 P0.5 bidirectional Port 0 bit 5 I/O with alternate functions ADC4 analog input and KB5 keyboard input.
17 P0.4 bidirectional Port 0 bit 4 I/O with alternate functions ADC3 analog input and KB4 keyboard input.
18 P0.3 bidirectional Port 0 bit 3 I/O with alternate functions ADC2 analog input and KB3 keyboard input.
19 P0.2 bidirectional Port 0 bit 2 I/O with alternate functions BRAKE (PWM brake input), ADC1 analog input and KB2 keyboard input.
20 P0.1 bidirectional Port 0 bit 1 I/O with alternate functions PWM0 output, ADC0 analog input and KB1 keyboard input.

Key specifications

Parameter Value
Manufacturer Nuvoton Tech
Package TSSOP-20
Category Embedded Processors & Controllers
Pins 20

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 -40 85 C 166
Storage temperature -55 150 C 166
VDD to VSS voltage -0.3 6.5 V 166
Operating voltage VDD 3 5.5 V Fosc = 4 MHz ~ 24 MHz 166
Operating voltage VDD 2.4 5.5 V Fosc = 4 MHz ~12 MHz 166
Input low voltage (TTL) VIL -0.5 V 2.4< VDD< 5.5V; max printed 0.2VDD-0.1 166
Input low voltage (Schmitt) VIL1 -0.5 V 2.4< VDD< 5.5V; max printed 0.3VDD 166
Input low voltage (/RST, XTAL1) VIL2 -0.5 V 2.4< VDD< 5.5V; max printed 0.2VDD-0.1 166
Output low voltage P0,P2 VOL 0.45 V VDD=4.5V, IOL=20 mA 167
Output low voltage P10,P11,P14,P16,P17 VOL1 0.45 V VDD=4.5V, IOL=38 mA 167
Output high voltage quasi-bidirectional VOH 2.4 V VDD=4.5V, IOH=-380 μA 167
Output high voltage quasi-bidirectional VOH 2 V VDD=2.4V, IOH=-48 μA 167
Output high voltage push-pull VOH1 2.4 V VDD=4.5V, IOH=-28.0 mA 167
Output high voltage push-pull VOH1 2 V VDD=2.4V, IOH=-3.5 mA 167
Input leakage current ILI -10 10 μA open-drain or input mode, 0 < VIN < VDD 167
Power-down current IPD 5 30 μA Power-down mode 168
Power-down current, BOD on IPD 100 μA Power-down mode (BOD module on) 168
Reset pin internal pull-up resistor RRST 100 250 KΩ 2.4< VDD< 5.5V 168
BOD38 detection voltage VBOD38 3.5 3.8 4.1 V Temperature=25℃ 168
BOD38 detection voltage VBOD38 3.5 3.8 4.9 V Temperature=85℃ 168
BOD38 detection voltage VBOD38 3 3.8 4.1 V Temperature=-40℃ 168
BOD27 detection voltage VBOD27 2.5 2.7 2.9 V Temperature=25℃ 168
BOD27 detection voltage VBOD27 2.5 2.7 3.1 V Temperature=85℃ 168
BOD27 detection voltage VBOD27 2.4 2.7 2.9 V Temperature=-40℃ 168
ADC operating voltage VDD 2.7 5.5 V 10-bit SAR-ADC 169
ADC integral nonlinearity INL -1 1 LSB 169
ADC differential nonlinearity DNL -1 1 LSB 169
ADC gain error Ge -1 1 LSB 169
ADC offset error Ofe -4 4 LSB 169
ADC absolute error -4 4 LSB 169
Bandgap reference voltage VBG 1 1.3 1.6 V 169
External crystal clock input frequency 1/tCLCL 0 24 MHz 170
Clock high time tCHCX 20.8 Ns 170
Clock low time tCLCX 20.8 Ns 170
Clock rise time tCLCH 10 Ns 170
Clock fall time tCHCL 10 Ns 170
Internal RC frequency deviation -1 1 % +25°C @ VDD=5V 170
Internal RC frequency deviation -3 3 % +25°C @ VDD=2.7~5.5V 170
Internal RC frequency deviation -5 5 % -10°C~+70°C @ VDD=2.7~5.5V 170
Internal RC frequency deviation -8 8 % -40°C~+85°C @ VDD=2.7~5.5V 170
Operating current IOP 3.1 mA XTAL 12MHz, VDD=5.0V 167
Operating current IOP 4.3 mA XTAL 24MHz, VDD=5.5V 167

CAD (KiCad official)

  • Symbol: N79E815AT20
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: n79e815at20-etched.step / n79e815at20-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); n79e815at20.step / n79e815at20.glb are the bare package body.

Provenance

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

  • Datasheet: Nuvoton Tech datasheet (179 pp, sha256 d6a503318845ce88, retrieved 2026-10-26, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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