component
ATTINY461-20SU
Public Made by Adomby adom
Microchip Tech Pre-ordered MCUs, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownATTINY461-20SU
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);attiny461-20su.step/attiny461-20su.glbare 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, primaryclaude-sonnet-5-5(text), consensusclaude-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).