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ATTINY461-20SU

Public Made by Adom

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Microchip Tech Pre-ordered MCUs, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentembedded processors & controllersattiny461-20sufactory-2.0.0extractor-text

Verified ATTINY461-20SU

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier lcsc, 20 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ATTINY461-20SU · SOIC-20-300mil · 20 pins
  • ✓copper: 20 copper pads, none touching another net
  • ✓datasheet: all 20 pin names found in the 242-page datasheet
  • ✓distributor: lcsc C614926, digikey ATTINY461-20SU-ND, mouser 556-ATTINY461-20SU
  • ✓family: SOIC-20W_7.5x12.8mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-jx78zunk/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 20 pins = 20 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 20 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ attiny461-20su.kicad_sym✓ attiny461-20su.kicad_mod✓ attiny461-20su.step
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Ray Publish 0.1.0 e32bbb7 5d ago

ATTINY461-20SU

Microchip Tech · Pre-ordered MCUs · SOIC-20-300mil

ATTINY461-20SU from Microchip Tech, in a SOIC-20-300mil. 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 PB0 bidirectional Port B bit 0, bi-directional I/O with selectable pull-up; alternate functions MOSI/DI/SDA (USI data input), OC1A and PCINT8.
2 PB1 bidirectional Port B bit 1, bi-directional I/O with selectable pull-up; alternate functions MISO/DO (USI data output), OC1A and PCINT9.
3 PB2 bidirectional Port B bit 2, bi-directional I/O with selectable pull-up; alternate functions SCK/USCK/SCL (USI clock), OC1B and PCINT10.
4 PB3 bidirectional Port B bit 3, bi-directional I/O with selectable pull-up; alternate functions OC1B and PCINT11.
5 VCC power_in Supply voltage (2.7-5.5V for ATtiny461, 1.8-5.5V for ATtiny461V).
6 GND power_in Ground.
7 PB4 bidirectional Port B bit 4, bi-directional I/O with selectable pull-up; alternate functions XTAL1/CLKI (chip clock oscillator input), OC1D, ADC7 and PCINT12.
8 PB5 bidirectional Port B bit 5, bi-directional I/O with selectable pull-up; alternate functions XTAL2/CLKO (crystal oscillator output, system clock output), OC1D, ADC8 and PCINT13.
9 PB6 bidirectional Port B bit 6, bi-directional I/O with selectable pull-up; alternate functions ADC9, T0, INT0 and PCINT14.
10 PB7 bidirectional Port B bit 7 / RESET: active-low reset input (pulse longer than the minimum length generates a reset) that can be used as a weak I/O pin when RSTDISBL fuse is programmed; also debugWIRE I/O, ADC10 and PCINT15.
11 PA7 bidirectional Port A bit 7, bi-directional I/O with selectable pull-up; alternate functions ADC6, AIN1 and PCINT7.
12 PA6 bidirectional Port A bit 6, bi-directional I/O with selectable pull-up; alternate functions ADC5, AIN0 and PCINT6.
13 PA5 bidirectional Port A bit 5, bi-directional I/O with selectable pull-up; alternate functions ADC4, AIN2 and PCINT5.
14 PA4 bidirectional Port A bit 4, bi-directional I/O with selectable pull-up; alternate functions ADC3, ICP0 and PCINT4.
15 AVCC power_in Analog supply for the ADC, analog comparator, BOD, internal voltage reference and Port A; must be connected to VCC even if the ADC is unused, through a low-pass filter if the ADC is used.
16 AGND power_in Analog ground.
17 PA3 bidirectional Port A bit 3, bi-directional I/O with selectable pull-up; alternate functions AREF (ADC reference) and PCINT3.
18 PA2 bidirectional Port A bit 2, bi-directional I/O with selectable pull-up; alternate functions ADC2, INT1, USCK/SCL (USI clock, when USIPOS set) and PCINT2.
19 PA1 bidirectional Port A bit 1, bi-directional I/O with selectable pull-up; alternate functions ADC1, DO (USI data output, when USIPOS set) and PCINT1.
20 PA0 bidirectional Port A bit 0, bi-directional I/O with selectable pull-up; alternate functions ADC0, DI/SDA (USI data input, when USIPOS set) and PCINT0.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SOIC-20-300mil
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 (absolute maximum section) -55 125 °C 187
Storage Temperature -65 150 °C 187
Voltage on any pin except RESET with respect to Ground -0.5 5.5 V -0.5V to VCC+0.5V; max shown at VCC = 5V is not printed, see VCC+0.5 187
Voltage on RESET with respect to Ground -0.5 13 V 187
Maximum Operating Voltage 6 V 187
DC Current per I/O Pin 40 mA 187
DC Current VCC and GND Pins 200 mA 187
Operating Voltage VCC 2.7 5.5 V ATtiny461 (non-V) 1
Speed Grade 0-10 MHz 0 10 MHz VCC = 2.7 - 5.5V 1
Speed Grade 0-20 MHz 0 20 MHz VCC = 4.5 - 5.5V 1
Operating temperature (industrial) TA -40 85 °C Industrial 229
Input Low-voltage, except XTAL1 and RESET VIL -0.5 0.2 V Except XTAL1 and RESET pins; max printed as 0.2VCC 187
Input Low-voltage, XTAL1 VIL -0.5 0.1 V XTAL1 pin, External Clock Selected; max printed as 0.1VCC 187
Input Low-voltage, RESET VIL -0.5 0.2 V RESET pin; max printed as 0.2VCC 187
Input Low-voltage, RESET as I/O VIL -0.5 0.2 V RESET pin as I/O; max printed as 0.2VCC 187
Input High-voltage, except XTAL1 and RESET VIH 0.7 0.5 V Except XTAL1 and RESET pins; min printed as 0.7VCC, max as VCC+0.5 187
Input High-voltage, XTAL1 VIH 0.8 0.5 V XTAL1 pin, External Clock Selected; min printed as 0.8VCC, max as VCC+0.5 187
Input High-voltage, RESET VIH 0.9 0.5 V RESET pin; min printed as 0.9VCC, max as VCC+0.5 187
Input High-voltage, RESET as I/O VIH 0.7 0.5 V RESET pin as I/O; min printed as 0.7VCC, max as VCC+0.5 187
Output Low Voltage (IOL=10mA) VOL 0.6 V IOL = 10 mA, VCC = 5V 187
Output Low Voltage (IOL=5mA) VOL 0.5 V IOL = 5 mA, VCC = 3V 187
Output High-voltage (IOH=-10mA) VOH 4.3 V IOH = -10 mA, VCC = 5V 187
Output High-voltage (IOH=-5mA) VOH 2.5 V IOH = -5 mA, VCC = 3V 187
Input Leakage Current I/O Pin, pin low IIL 0.05 1 µA Vcc = 5.5V, pin low (absolute value) 187
Input Leakage Current I/O Pin, pin high IIH 0.05 1 µA Vcc = 5.5V, pin high (absolute value) 187
Reset Pull-up Resistor RRST 30 60 kΩ 187
I/O Pin Pull-up Resistor RPU 20 50 kΩ 187
Power Supply Current Active 1MHz ICC 0.4 0.6 mA Active 1MHz, VCC = 2V 188
Power Supply Current Active 4MHz ICC 2 3 mA Active 4MHz, VCC = 3V 188
Power Supply Current Active 8MHz ICC 6 9 mA Active 8MHz, VCC = 5V 188
Power Supply Current Idle 1MHz ICC 0.1 0.3 mA Idle 1MHz, VCC = 2V 188
Power Supply Current Idle 4MHz ICC 0.4 1 mA Idle 4MHz, VCC = 3V 188
Power Supply Current Idle 8MHz ICC 1.5 3 mA Idle 8MHz, VCC = 5V 188
Power-down current, WDT enabled ICC 4 10 µA WDT enabled, VCC = 3V 188
Power-down current, WDT disabled ICC 0.15 2 µA WDT disabled, VCC = 3V 188
Factory calibration accuracy of internal RC oscillator -10 8 10 % 8.0 MHz, VCC 3V, 25C 189
User calibration accuracy of internal RC oscillator -1 1 % Fixed frequency within 7.3 - 8.1 MHz, fixed voltage within 2.7 - 5.5V, fixed temperature within -40C to +85C 189
External clock frequency (VCC 2.7-5.5V) 1/tCLCL 0 10 MHz VCC = 2.7 - 5.5V 190
External clock frequency (VCC 4.5-5.5V) 1/tCLCL 0 20 MHz VCC = 4.5 - 5.5V 190
Clock Period (VCC 2.7-5.5V) tCLCL 100 ns VCC = 2.7 - 5.5V 190
Clock Period (VCC 4.5-5.5V) tCLCL 50 ns VCC = 4.5 - 5.5V 190
Clock High Time (VCC 4.5-5.5V) tCHCX 20 ns VCC = 4.5 - 5.5V 190
Clock Low Time (VCC 4.5-5.5V) tCLCX 20 ns VCC = 4.5 - 5.5V 190
Rise Time (VCC 4.5-5.5V) tCLCH 0.5 µs VCC = 4.5 - 5.5V 190
Fall Time (VCC 4.5-5.5V) tCHCL 0.5 µs VCC = 4.5 - 5.5V 190
Change in clock period from one cycle to the next ΔtCLCL 2 % 190
Internal bandgap reference voltage VBG 1 1.1 1.2 V VCC = 2.7V, TA = 25°C 190
Minimum pulse width on RESET pin tRST 2.5 µs VCC = 3V 190
Brown-out Detector Hysteresis VHYST 50 mV 190
Release threshold of power-on reset VPOR 0.7 1 1.4 V TA = -40 to +85C 190
Activation threshold of power-on reset VPOA 0.05 0.9 1.3 V TA = -40 to +85C 190
Brown-out trigger level BODLEVEL 101 VBOT 2.5 2.7 2.9 V BODLEVEL[2:0] = 101 191
Brown-out trigger level BODLEVEL 100 VBOT 4.1 4.3 4.5 V BODLEVEL[2:0] = 100 191
ADC Resolution 10 Bits 192
ADC Absolute accuracy 2 LSB VREF = 4V, VCC = 4V, ADC clock = 200 kHz 192
ADC Conversion Time 13 260 µs Free Running Conversion 192
ADC Clock Frequency 50 1000 kHz 192
Internal 1.1V Reference VINT 1 1.1 1.2 V 192
Internal 2.56V Reference VINT 2.3 2.56 2.8 V 192

CAD (KiCad official)

  • Symbol: ATTINY461-20SU
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
  • 3D model files: attiny461-20su-etched.step / attiny461-20su-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); attiny461-20su.step / attiny461-20su.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (242 pp, sha256 9f65cf6ba6f875c2, retrieved 2026-10-30, 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