component
ATTINY87-XUR
Public Made by Adomby adom
Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "attiny87-xur",
"title": "ATTINY87-XUR",
"brief": "Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
"component",
"single chip microcomputer-microcontroller",
"attiny87-xur",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "ATTINY87-XUR",
"manufacturer": "Microchip Tech",
"package": "TSSOP-20",
"pin_count": 20,
"category": "Single Chip Microcomputer/Microcontroller",
"subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/b7fc70a37e49e696f281d381bcf0becd.pdf",
"parts": {
"symbol": "attiny87-xur.kicad_sym",
"footprint": "attiny87-xur.kicad_mod",
"model_3d": "attiny87-xur-hero.glb",
"model_3d_plain": "attiny87-xur-etched.glb",
"model_3d_step": "attiny87-xur-etched.step",
"model_3d_step_plain": "attiny87-xur.step",
"lbr": "attiny87-xur.lbr"
},
"distributor_links": {
"lcsc": "C610578",
"digikey": "ATTINY87-XURTR-ND",
"mouser": "556-ATTINY87-XUR"
},
"distributor_check": {
"checked_at": "2026-10-30T11:51:32Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATTINY87-XURTR-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "556-ATTINY87-XUR",
"status": "found",
"lifecycle": "Not Recommended for New Designs"
}
},
"pins": [
{
"number": "1",
"name": "PA0",
"type": "bidirectional",
"description": "Port A bit 0 with selectable pull-up; alternate functions PCINT0, ADC0, RXD (UART receive) and RXLIN (LIN receive)."
},
{
"number": "2",
"name": "PA1",
"type": "bidirectional",
"description": "Port A bit 1 with selectable pull-up; alternate functions PCINT1, ADC1, TXD (UART transmit) and TXLIN (LIN transmit)."
},
{
"number": "3",
"name": "PA2",
"type": "bidirectional",
"description": "Port A bit 2 with selectable pull-up; alternate functions PCINT2, ADC2, OC0A, DO (USI data output) and MISO (SPI)."
},
{
"number": "4",
"name": "PA3",
"type": "bidirectional",
"description": "Port A bit 3 with selectable pull-up; alternate functions PCINT3, ADC3, ISRC (current source pin) and INT1."
},
{
"number": "5",
"name": "AVCC",
"type": "power_in",
"description": "Analog supply voltage."
},
{
"number": "6",
"name": "AGND",
"type": "power_in",
"description": "Analog ground."
},
{
"number": "7",
"name": "PA4",
"type": "bidirectional",
"description": "Port A bit 4 with selectable pull-up; alternate functions PCINT4, ADC4, ICP1, DI/SDA (USI) and MOSI (SPI)."
},
{
"number": "8",
"name": "PA5",
"type": "bidirectional",
"description": "Port A bit 5 with selectable pull-up; alternate functions PCINT5, ADC5, T1, USCK/SCL (USI) and SCK (SPI)."
},
{
"number": "9",
"name": "PA6",
"type": "bidirectional",
"description": "Port A bit 6 with selectable pull-up; alternate functions PCINT6, ADC6, AIN0 (comparator negative input) and SS (SPI slave select)."
},
{
"number": "10",
"name": "PA7",
"type": "bidirectional",
"description": "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)."
},
{
"number": "11",
"name": "PB7",
"type": "bidirectional",
"description": "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."
},
{
"number": "12",
"name": "PB6",
"type": "bidirectional",
"description": "Port B bit 6 with selectable pull-up; alternate functions PCINT14, ADC9, OC1AX and INT0."
},
{
"number": "13",
"name": "PB5",
"type": "bidirectional",
"description": "Port B bit 5 with selectable pull-up; alternate functions PCINT13, ADC8, OC1BW, XTAL2 (oscillator pin 2) and CLKO (divided system clock output)."
},
{
"number": "14",
"name": "PB4",
"type": "bidirectional",
"description": "Port B bit 4 with selectable pull-up; alternate functions PCINT12, OC1AW, XTAL1 (oscillator pin 1) and CLKI (external clock input)."
},
{
"number": "15",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage (1.8 - 5.5V operating range)."
},
{
"number": "16",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "17",
"name": "PB3",
"type": "bidirectional",
"description": "Port B bit 3 with selectable pull-up; alternate functions PCINT11 and OC1BV."
},
{
"number": "18",
"name": "PB2",
"type": "bidirectional",
"description": "Port B bit 2 with selectable pull-up; alternate functions PCINT10, OC1AV, USCK and SCL (USI default clock)."
},
{
"number": "19",
"name": "PB1",
"type": "bidirectional",
"description": "Port B bit 1 with selectable pull-up; alternate functions PCINT9, OC1BU and DO (USI default data output)."
},
{
"number": "20",
"name": "PB0",
"type": "bidirectional",
"description": "Port B bit 0 with selectable pull-up; alternate functions PCINT8, OC1AU, DI and SDA (USI default data input/output)."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The Figure 1-2 text extraction (page 11) loses the left/right column layout. I took pin numbers from; The datasheet text gives no explicit pin-number table for the 20-pin package. The MPN ATtiny87-XUR m",
"6/20 pins cited to the wrong page (name found elsewhere): ['8:PA5@p84', '10:PA7@p84', '17:PB3@p89', '18:PB2@p89']"
],
"pages_sent": 76,
"cost_usd": 0.527,
"at": "2026-10-30T11:51:13"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/b7fc70a37e49e696f281d381bcf0becd.pdf",
"pages": 303,
"sha256": "bd44c151eaf787c8",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 20,
"described": 20,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "attiny87-xur.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.4,
6.5,
1.2
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "attiny87-xur-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.4,
6.5,
1.2
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "187799ddb86fb056f1245b870e8a37f7f99b5df2ccad5a557da8e5df5e37bd4b",
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}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "TSSOP-20",
"Category": "Single Chip Microcomputer/Microcontroller",
"Pins": "20"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "bd44c151eaf787c8aebaccaa7f8dd77c40e8a714ecc9eb9e1fa8cee2f9058d76",
"rows": [
{
"name": "Operating Temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Storage Temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Voltage on any Pin except RESET",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 5.5,
"conditions": "with respect to Ground; max printed as VCC+0.5V (5.5 is not printed; see review)",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Voltage on RESET",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 13,
"conditions": "with respect to Ground",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Voltage on VCC",
"symbol": "VCC",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 6,
"conditions": "with respect to Ground",
"source_page": 250,
"source": "datasheet"
},
{
"name": "DC Current per I/O Pin",
"symbol": "",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 40,
"conditions": "",
"source_page": 250,
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{
"name": "DC Current VCC and GND Pins",
"symbol": "",
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"min": null,
"typ": null,
"max": 200,
"conditions": "",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Injection Current",
"symbol": "",
"kind": "absolute_maximum",
"unit": "mA",
"min": -5,
"typ": null,
"max": 5,
"conditions": "VCC = 0V to 5V",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Supply voltage",
"symbol": "VCC",
"kind": "recommended_operating",
"unit": "V",
"min": 1.8,
"typ": null,
"max": 5.5,
"conditions": "TA = -40°C to +85°C",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Input Low Voltage",
"symbol": "VIL",
"kind": "electrical",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 0.2,
"conditions": "Except XTAL1 and RESET pins; max is 0.2 VCC",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Input Low Voltage XTAL1",
"symbol": "VIL1",
"kind": "electrical",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 0.1,
"conditions": "XTAL1 pin - External Clock Selected; max is 0.1 VCC",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Input Low Voltage RESET",
"symbol": "VIL2",
"kind": "electrical",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 0.2,
"conditions": "RESET pin; max is 0.2 VCC",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Input Low Voltage RESET as I/O",
"symbol": "VIL3",
"kind": "electrical",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 0.2,
"conditions": "RESET pin as I/O; max is 0.2 VCC",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Input High Voltage",
"symbol": "VIH",
"kind": "electrical",
"unit": "V",
"min": 0.7,
"typ": null,
"max": null,
"conditions": "Except XTAL1 and RESET pins; min is 0.7 VCC, max VCC + 0.5 V",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Input High Voltage XTAL1",
"symbol": "VIH1",
"kind": "electrical",
"unit": "V",
"min": 0.8,
"typ": null,
"max": null,
"conditions": "XTAL1 pin - External Clock Selected; min is 0.8 VCC, max VCC + 0.5 V",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Input High Voltage RESET",
"symbol": "VIH2",
"kind": "electrical",
"unit": "V",
"min": 0.9,
"typ": null,
"max": null,
"conditions": "RESET pin; min is 0.9 VCC, max VCC + 0.5 V",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Input High Voltage RESET as I/O",
"symbol": "VIH3",
"kind": "electrical",
"unit": "V",
"min": 0.7,
"typ": null,
"max": null,
"conditions": "RESET pin as I/O; min is 0.7 VCC, max VCC + 0.5 V",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Output Low Voltage",
"symbol": "VOL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.6,
"conditions": "IOL = 10 mA, VCC = 5V",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Output Low Voltage",
"symbol": "VOL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.5,
"conditions": "IOL = 5 mA, VCC = 3V",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Output High Voltage",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 4.3,
"typ": null,
"max": null,
"conditions": "IOH = -10 mA, VCC = 5V",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Output High Voltage",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 2.5,
"typ": null,
"max": null,
"conditions": "IOH = -5 mA, VCC = 3V",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Input Leakage Current I/O Pin (pin low)",
"symbol": "IIL",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 0.05,
"max": 1,
"conditions": "VCC = 5.5V, pin low (absolute value)",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Input Leakage Current I/O Pin (pin high)",
"symbol": "IIH",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 0.05,
"max": 1,
"conditions": "VCC = 5.5V, pin high (absolute value)",
"source_page": 250,
"source": "datasheet"
},
{
"name": "Reset Pull-up Resistor",
"symbol": "RRST",
"kind": "electrical",
"unit": "kΩ",
"min": 30,
"typ": null,
"max": 60,
"conditions": "",
"source_page": 251,
"source": "datasheet"
},
{
"name": "I/O Pin Pull-up Resistor",
"symbol": "Rpu",
"kind": "electrical",
"unit": "kΩ",
"min": 20,
"typ": null,
"max": 50,
"conditions": "",
"source_page": 251,
"source": "datasheet"
},
{
"name": "Power Supply Current Active Mode",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 5.5,
"max": 7,
"conditions": "8 MHz, VCC = 5V, external clock",
"source_page": 251,
"source": "datasheet"
},
{
"name": "Power Supply Current Active Mode",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 1.8,
"max": 2.5,
"conditions": "4 MHz, VCC = 3V, external clock",
"source_page": 251,
"source": "datasheet"
},
{
"name": "Power Supply Current Active Mode",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.3,
"max": 0.6,
"conditions": "1 MHz, VCC = 2V, external clock",
"source_page": 251,
"source": "datasheet"
},
{
"name": "Power Supply Current Idle Mode",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 1.8,
"max": 2.5,
"conditions": "8 MHz, VCC = 5V, external clock",
"source_page": 251,
"source": "datasheet"
},
{
"name": "Power Supply Current Idle Mode",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.5,
"max": 0.8,
"conditions": "4 MHz, VCC = 3V, external clock",
"source_page": 251,
"source": "datasheet"
},
{
"name": "Power Supply Current Idle Mode",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.05,
"max": 0.2,
"conditions": "1 MHz, VCC = 2V, external clock",
"source_page": 251,
"source": "datasheet"
},
{
"name": "Power Supply Current Power-down Mode",
"symbol": "ICC",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 5,
"max": 10,
"conditions": "WDT enabled, VCC = 3V",
"source_page": 251,
"source": "datasheet"
},
{
"name": "Power Supply Current Power-down Mode",
"symbol": "ICC",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 0.15,
"max": 4,
"conditions": "WDT disabled, VCC = 3V",
"source_page": 251,
"source": "datasheet"
},
{
"name": "Analog Comparator Input Offset Voltage",
"symbol": "VACIO",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 10,
"max": 40,
"conditions": "VCC = 5V, Vin = VCC/2",
"source_page": 251,
"source": "datasheet"
},
{
"name": "Analog Comparator Input Leakage Current",
"symbol": "IACLK",
"kind": "electrical",
"unit": "nA",
"min": -50,
"typ": null,
"max": 50,
"conditions": "VCC = 5V, Vin = VCC/2",
"source_page": 251,
"source": "datasheet"
},
{
"name": "Analog Comparator Propagation Delay",
"symbol": "tACID",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": 170,
"max": null,
"conditions": "VCC = 2.7V, common mode VCC/2",
"source_page": 251,
"source": "datasheet"
},
{
"name": "Analog Comparator Propagation Delay",
"symbol": "tACID",
"kind": "timing",
"unit": "ns",
"min": null,
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