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ATTINY87-XUR

Public Made by Adom

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

componentsingle chip microcomputer-microcontrollerattiny87-xurfactory-2.0.0extractor-text

Verified ATTINY87-XUR

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

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier mfr, 20 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ATTINY87-XUR · TSSOP-20 · 20 pins
  • ✓copper: 20 copper pads, none touching another net
  • ✓datasheet: all 20 pin names found in the 303-page datasheet
  • ✓distributor: lcsc C610578, digikey ATTINY87-XURTR-ND, mouser 556-ATTINY87-XUR
  • ✓family: TSSOP-20_4.4x6.5mm_P0.65mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-ajvoq75z/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✓ attiny87-xur.kicad_sym✓ attiny87-xur.kicad_mod✓ attiny87-xur.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 5d ago
viewers attiny87-xur: viewers · Ray 5d ago
attiny87-xur-etched.glb Publish 0.1.0 · Ray 5d ago
attiny87-xur-etched.step attiny87-xur: factory component page (tier=mfr) · Ray 5d ago
attiny87-xur-hero.glb attiny87-xur: hero GLB from the etched model (keeps the MPN mark) · Ray 5d ago
attiny87-xur-hero.overlay.json Publish 0.1.0 · Ray 5d ago
attiny87-xur.glb Publish 0.1.0 · Ray 5d ago
attiny87-xur.kicad_mod Publish 0.1.0 · Ray 5d ago
attiny87-xur.kicad_sym Publish 0.1.0 · Ray 5d ago
attiny87-xur.lbr Publish 0.1.0 · Ray 5d ago
attiny87-xur.step Publish 0.1.0 · Ray 5d ago
package.json Publish 0.1.0 · Ray 5d ago
page.json Set visibility: public · Ray 5d ago
README.md Publish 0.1.0 · Ray 5d ago
verification.json Verified: Published by the parts factory: tier mfr, 20 pins · Ray 5d ago

ATTINY87-XUR

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

ATTINY87-XUR from Microchip 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 PA0 bidirectional Port A bit 0 with selectable pull-up; alternate functions PCINT0, ADC0, RXD (UART receive) and RXLIN (LIN receive).
2 PA1 bidirectional Port A bit 1 with selectable pull-up; alternate functions PCINT1, ADC1, TXD (UART transmit) and TXLIN (LIN transmit).
3 PA2 bidirectional Port A bit 2 with selectable pull-up; alternate functions PCINT2, ADC2, OC0A, DO (USI data output) and MISO (SPI).
4 PA3 bidirectional Port A bit 3 with selectable pull-up; alternate functions PCINT3, ADC3, ISRC (current source pin) and INT1.
5 AVCC power_in Analog supply voltage.
6 AGND power_in Analog ground.
7 PA4 bidirectional Port A bit 4 with selectable pull-up; alternate functions PCINT4, ADC4, ICP1, DI/SDA (USI) and MOSI (SPI).
8 PA5 bidirectional Port A bit 5 with selectable pull-up; alternate functions PCINT5, ADC5, T1, USCK/SCL (USI) and SCK (SPI).
9 PA6 bidirectional Port A bit 6 with selectable pull-up; alternate functions PCINT6, ADC6, AIN0 (comparator negative input) and SS (SPI slave select).
10 PA7 bidirectional Port A bit 7 with selectable pull-up; alternate functions PCINT7, ADC7, AIN1 (comparator positive input), XREF (internal reference output) and AREF (external ADC reference input).
11 PB7 bidirectional Port B bit 7 with selectable pull-up; functions as RESET input (I/O only if RSTDISBL fuse is programmed) and dW (debugWIRE), plus PCINT15, ADC10 and OC1BX.
12 PB6 bidirectional Port B bit 6 with selectable pull-up; alternate functions PCINT14, ADC9, OC1AX and INT0.
13 PB5 bidirectional Port B bit 5 with selectable pull-up; alternate functions PCINT13, ADC8, OC1BW, XTAL2 (oscillator pin 2) and CLKO (divided system clock output).
14 PB4 bidirectional Port B bit 4 with selectable pull-up; alternate functions PCINT12, OC1AW, XTAL1 (oscillator pin 1) and CLKI (external clock input).
15 VCC power_in Supply voltage (1.8 - 5.5V operating range).
16 GND power_in Ground.
17 PB3 bidirectional Port B bit 3 with selectable pull-up; alternate functions PCINT11 and OC1BV.
18 PB2 bidirectional Port B bit 2 with selectable pull-up; alternate functions PCINT10, OC1AV, USCK and SCL (USI default clock).
19 PB1 bidirectional Port B bit 1 with selectable pull-up; alternate functions PCINT9, OC1BU and DO (USI default data output).
20 PB0 bidirectional Port B bit 0 with selectable pull-up; alternate functions PCINT8, OC1AU, DI and SDA (USI default data input/output).

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TSSOP-20
Category Single Chip Microcomputer/Microcontroller
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 250
Storage Temperature -65 150 °C 250
Voltage on any Pin except RESET -0.5 5.5 V with respect to Ground; max printed as VCC+0.5V (5.5 is not printed; see review) 250
Voltage on RESET -0.5 13 V with respect to Ground 250
Voltage on VCC VCC -0.5 6 V with respect to Ground 250
DC Current per I/O Pin 40 mA 250
DC Current VCC and GND Pins 200 mA 250
Injection Current -5 5 mA VCC = 0V to 5V 250
Supply voltage VCC 1.8 5.5 V TA = -40°C to +85°C 250
Input Low Voltage VIL -0.5 0.2 V Except XTAL1 and RESET pins; max is 0.2 VCC 250
Input Low Voltage XTAL1 VIL1 -0.5 0.1 V XTAL1 pin - External Clock Selected; max is 0.1 VCC 250
Input Low Voltage RESET VIL2 -0.5 0.2 V RESET pin; max is 0.2 VCC 250
Input Low Voltage RESET as I/O VIL3 -0.5 0.2 V RESET pin as I/O; max is 0.2 VCC 250
Input High Voltage VIH 0.7 V Except XTAL1 and RESET pins; min is 0.7 VCC, max VCC + 0.5 V 250
Input High Voltage XTAL1 VIH1 0.8 V XTAL1 pin - External Clock Selected; min is 0.8 VCC, max VCC + 0.5 V 250
Input High Voltage RESET VIH2 0.9 V RESET pin; min is 0.9 VCC, max VCC + 0.5 V 250
Input High Voltage RESET as I/O VIH3 0.7 V RESET pin as I/O; min is 0.7 VCC, max VCC + 0.5 V 250
Output Low Voltage VOL 0.6 V IOL = 10 mA, VCC = 5V 250
Output Low Voltage VOL 0.5 V IOL = 5 mA, VCC = 3V 250
Output High Voltage VOH 4.3 V IOH = -10 mA, VCC = 5V 250
Output High Voltage VOH 2.5 V IOH = -5 mA, VCC = 3V 250
Input Leakage Current I/O Pin (pin low) IIL 0.05 1 µA VCC = 5.5V, pin low (absolute value) 250
Input Leakage Current I/O Pin (pin high) IIH 0.05 1 µA VCC = 5.5V, pin high (absolute value) 250
Reset Pull-up Resistor RRST 30 60 kΩ 251
I/O Pin Pull-up Resistor Rpu 20 50 kΩ 251
Power Supply Current Active Mode ICC 5.5 7 mA 8 MHz, VCC = 5V, external clock 251
Power Supply Current Active Mode ICC 1.8 2.5 mA 4 MHz, VCC = 3V, external clock 251
Power Supply Current Active Mode ICC 0.3 0.6 mA 1 MHz, VCC = 2V, external clock 251
Power Supply Current Idle Mode ICC 1.8 2.5 mA 8 MHz, VCC = 5V, external clock 251
Power Supply Current Idle Mode ICC 0.5 0.8 mA 4 MHz, VCC = 3V, external clock 251
Power Supply Current Idle Mode ICC 0.05 0.2 mA 1 MHz, VCC = 2V, external clock 251
Power Supply Current Power-down Mode ICC 5 10 µA WDT enabled, VCC = 3V 251
Power Supply Current Power-down Mode ICC 0.15 4 µA WDT disabled, VCC = 3V 251
Analog Comparator Input Offset Voltage VACIO 10 40 mV VCC = 5V, Vin = VCC/2 251
Analog Comparator Input Leakage Current IACLK -50 50 nA VCC = 5V, Vin = VCC/2 251
Analog Comparator Propagation Delay tACID 170 ns VCC = 2.7V, common mode VCC/2 251
Analog Comparator Propagation Delay tACID 180 ns VCC = 5.0V, common mode VCC/2 251
Factory calibrated internal oscillator accuracy -10 8 10 % 8.0 MHz, 3V, 25C 252
User calibrated internal oscillator accuracy -1 1 % 7.3 - 8.1 MHz, 1.8 - 5.5V, -40C to +85C 252
Oscillator Frequency 1/tCLCL 0 4 MHz Vcc = 1.8 - 5.5V 253
Oscillator Frequency 1/tCLCL 0 8 MHz Vcc = 2.7 - 5.5V 253
Oscillator Frequency 1/tCLCL 0 16 MHz Vcc = 4.5 - 5.5V 253
Bandgap reference voltage VBG 1 1.1 1.2 V VCC = 4.5, TA = 25°C 254
Brown-out threshold BODLEVEL=110 VBOT 1.7 1.8 2 V BODLEVEL[2:0] = 110b 254
Brown-out threshold BODLEVEL=101 VBOT 2.5 2.7 2.9 V BODLEVEL[2:0] = 101b 254
Brown-out threshold BODLEVEL=100 VBOT 4.1 4.3 4.5 V BODLEVEL[2:0] = 100b 254
Power-on Reset Threshold Voltage (falling) VPOT 1 1.3 1.6 V falling 253
Current Source current IISRC 94 106 µA VCC = 2.7 V / 5.5 V, T = -40°C / +85°C 255
ADC absolute accuracy single ended TUE 2 3.5 LSB VCC = 4V, VRef = 4V, ADC clock = 200 kHz 255
ADC INL single ended INL 0.6 2 LSB VCC = 4V, VRef = 4V, ADC clock = 200 kHz 255
ADC DNL single ended DNL 0.3 0.8 LSB VCC = 4V, VRef = 4V, ADC clock = 200 kHz 255
ADC gain error single ended Gain error -6 -2.5 2 LSB VCC = 4V, VRef = 4V, ADC clock = 200 kHz 255
ADC offset error single ended Offset error -3.5 1.5 3.5 LSB VCC = 4V, VRef = 4V, ADC clock = 200 kHz 255
Internal 1.1V reference VINT 1 1.1 1.2 V 255
Internal 2.56V reference VINT 2.3 2.56 2.8 V VCC > 3.0V 255
External voltage reference single ended AREF 2 V Single Ended Conversions; max AVCC 255

CAD (KiCad official)

  • Symbol: ATTINY87-XUR
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: attiny87-xur-etched.step / attiny87-xur-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); attiny87-xur.step / attiny87-xur.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (303 pp, sha256 bd44c151eaf787c8, retrieved 2026-10-30, 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