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ATTINY85-20PU

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Microchip Tech MICROCHIP, PDIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Contents

README

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ATTINY85-20PU

Microchip Tech · MICROCHIP · PDIP-8

ATTINY85-20PU from Microchip Tech, in a PDIP-8. 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 PB5 bidirectional Port B bit 5 (PCINT5/RESET/ADC0/dW): a low level longer than the minimum pulse length generates a reset if the reset pin is not disabled, and the pin can also be used as a (weak) I/O pin.
2 PB3 bidirectional Port B bit 3 (PCINT3/XTAL1/CLKI/OC1B/ADC3): bi-directional I/O with internal pull-up, tri-stated during reset.
3 PB4 bidirectional Port B bit 4 (PCINT4/XTAL2/CLKO/OC1B/ADC2): bi-directional I/O with internal pull-up, tri-stated during reset.
4 GND power_in Ground.
5 PB0 bidirectional Port B bit 0 (MOSI/DI/SDA/AIN0/OC0A/OC1A/AREF/PCINT0): bi-directional I/O with internal pull-up, tri-stated during reset.
6 PB1 bidirectional Port B bit 1 (MISO/DO/AIN1/OC0B/OC1A/PCINT1): bi-directional I/O with internal pull-up, tri-stated during reset.
7 PB2 bidirectional Port B bit 2 (SCK/USCK/SCL/ADC1/T0/INT0/PCINT2): bi-directional I/O with internal pull-up, tri-stated during reset.
8 VCC power_in Supply voltage, 2.7 - 5.5V for ATtiny85 (0 - 20 MHz at 4.5 - 5.5V).

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package PDIP-8
Category Embedded Processors & Controllers
Pins 8

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 max) -55 125 °C 161
Storage Temperature -65 150 °C 161
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 basis not printed; see range) 161
Voltage on RESET with respect to Ground -0.5 13 V 161
Maximum Operating Voltage 6 V 161
DC Current per I/O Pin 40 mA 161
DC Current VCC and GND Pins 200 mA 161
Operating Voltage VCC 2.7 5.5 V ATtiny85 (non-V) 1
Clock Frequency 1/tCLCL 0 20 MHz VCC = 4.5 - 5.5V 164
Clock Frequency 1/tCLCL 0 10 MHz VCC = 2.7 - 5.5V 164
Input Low-voltage, except XTAL1 and RESET pin VIL -0.5 0.3 V VCC = 2.4V - 5.5V; max 0.3VCC 161
Input High-voltage, except XTAL1 and RESET pin VIH 0.6 0.5 V VCC = 2.4V - 5.5V; min 0.6VCC, max VCC+0.5 161
Input Low-voltage, XTAL1 pin, External Clock Selected VIL1 -0.5 0.1 V VCC = 1.8V - 5.5V; max 0.1VCC 161
Input High-voltage, XTAL1 pin, External Clock Selected VIH1 0.7 0.5 V VCC = 2.4V - 5.5V; min 0.7VCC, max VCC+0.5 161
Input Low-voltage, RESET pin VIL2 -0.5 0.2 V VCC = 1.8V - 5.5V; max 0.2VCC 161
Input High-voltage, RESET pin VIH2 0.9 0.5 V VCC = 1.8V - 5.5V; min 0.9VCC, max VCC+0.5 161
Output Low-voltage, Port B VOL 0.6 V IOL = 10 mA, VCC = 5V 161
Output Low-voltage, Port B VOL 0.5 V IOL = 5 mA, VCC = 3V 161
Output High-voltage, Port B VOH 4.3 V IOH = -10 mA, VCC = 5V 161
Output High-voltage, Port B VOH 2.5 V IOH = -5 mA, VCC = 3V 161
Input Leakage Current I/O Pin, pin low IIL 0.05 1 µA VCC = 5.5V, pin low (absolute value) 161
Input Leakage Current I/O Pin, pin high IIH 0.05 1 µA VCC = 5.5V, pin high (absolute value) 161
Reset Pull-up Resistor RRST 30 60 kΩ VCC = 5.5V, input low 161
I/O Pin Pull-up Resistor Rpu 20 50 kΩ VCC = 5.5V, input low 162
Power Supply Current Active ICC 0.3 0.55 mA Active 1 MHz, VCC = 2V 162
Power Supply Current Active ICC 1.5 2.5 mA Active 4 MHz, VCC = 3V 162
Power Supply Current Active ICC 5 8 mA Active 8 MHz, VCC = 5V 162
Power Supply Current Idle ICC 0.1 0.2 mA Idle 1 MHz, VCC = 2V 162
Power Supply Current Idle ICC 0.35 0.6 mA Idle 4 MHz, VCC = 3V 162
Power Supply Current Idle ICC 1.2 2 mA Idle 8 MHz, VCC = 5V 162
Power-down mode current ICC 10 µA WDT enabled, VCC = 3V 162
Power-down mode current ICC 2 µA WDT disabled, VCC = 3V 162
Factory Calibration Accuracy of Internal RC Oscillator -10 10 % 8.0 MHz, 3V, 25C 164
User Calibration Accuracy of Internal RC Oscillator -1 1 % Fixed frequency within 6 - 8 MHz, fixed voltage within 2.7V - 5.5V, fixed temperature within -40C to +85C 164
Clock Period tCLCL 50 ns VCC = 4.5 - 5.5V 164
High Time tCHCX 20 ns VCC = 4.5 - 5.5V 164
Low Time tCLCX 20 ns VCC = 4.5 - 5.5V 164
Rise Time tCLCH 0.5 µs VCC = 4.5 - 5.5V 164
Fall Time tCHCL 0.5 µs VCC = 4.5 - 5.5V 164
Change in period from one clock cycle to the next ΔtCLCL 2 % VCC = 4.5 - 5.5V 164
RESET Pin Threshold Voltage VRST 0.2 0.9 V VCC = 3V; min 0.2 VCC, max 0.9 VCC 165
Minimum pulse width on RESET Pin tRST 2.5 µs VCC = 3V 165
Brown-out Detector Hysteresis VHYST 50 mV 165
Min Pulse Width on Brown-out Reset tBOD 2 µs 165
Bandgap reference voltage VBG 1 1.1 1.2 V VCC = 5.5V, TA = 25°C 165
Bandgap reference start-up time tBG 40 70 µs VCC = 2.7V, TA = 25°C 165
Bandgap reference current consumption IBG 15 µA VCC = 2.7V, TA = 25°C 165
Release threshold of power-on reset (enhanced) VPOR 1.1 1.4 1.6 V TA = -40C to +85C 166
Activation threshold of power-on reset (enhanced) VPOA 0.6 1.3 1.6 V TA = -40C to +85C 166
Brown-out trigger level BODLEVEL=110 VBOT 1.7 1.8 2 V BODLEVEL[2:0]=110 166
Brown-out trigger level BODLEVEL=101 VBOT 2.5 2.7 2.9 V BODLEVEL[2:0]=101 166
Brown-out trigger level BODLEVEL=100 VBOT 4.1 4.3 4.5 V BODLEVEL[2:0]=100 166
ADC Absolute accuracy 2 LSB VREF = 4V, VCC = 4V, ADC clock = 200 kHz 167
ADC Conversion Time 14 280 µs Free Running Conversion 167
ADC Clock Frequency 50 1000 kHz 167
ADC External Reference Voltage AREF 2 V max VCC 167
ADC Internal Voltage Reference VINT 1 1.1 1.2 V 167
ADC Internal 2.56V Reference VINT 2.3 2.56 2.8 V VCC > 3.0V 167

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin 3. Code indicators: H = NiPdAu lead finish, U/N = matte tin, R = tape & reel. 4. Can also be supplied in wafer form. Contact your local Atmel sales office for ordering information and minimum quantiti 204

CAD (KiCad official)

  • Symbol: ATTINY85-20PU
  • Footprint: Package_DIP:DIP-8_W7.62mm
  • 3D model: PDIP-8 (KiCad packages3D, STEP)
  • 3D model files: attiny85-20pu-etched.step / attiny85-20pu-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); attiny85-20pu.step / attiny85-20pu.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (234 pp, sha256 23a0f03bf0176cfc, retrieved 2026-10-23, tier: manufacturer)
  • 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