component
PCA9554APWR
Public Made by Adomby adom
Texas Instruments I/O Expanders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
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"slug": "pca9554apwr",
"title": "PCA9554APWR",
"brief": "Texas Instruments I/O Expanders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
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"manufacturer": "Texas Instruments",
"package": "TSSOP-16",
"pin_count": 16,
"category": "Communication Interface Chip",
"subcategory": "I/O Expanders",
"datasheet": "https://www.ti.com/lit/ds/symlink/pca9554a.pdf",
"parts": {
"symbol": "pca9554apwr.kicad_sym",
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"lbr": "pca9554apwr.lbr"
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"distributor_links": {
"lcsc": "C3194390",
"digikey": "296-21780-2-ND",
"mouser": "595-PCA9554APWR"
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"source": "Component Ocean /api/assign-pns",
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"status": "found",
"lifecycle": "Obsolete"
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},
"pins": [
{
"number": "1",
"name": "A0",
"type": "input",
"description": "Address input that sets the I2C slave address and must be connected directly to VCC or ground."
},
{
"number": "2",
"name": "A1",
"type": "input",
"description": "Address input that sets the I2C slave address and must be connected directly to VCC or ground."
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{
"number": "3",
"name": "A2",
"type": "input",
"description": "Address input that sets the I2C slave address and must be connected directly to VCC or ground."
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{
"number": "4",
"name": "P0",
"type": "bidirectional",
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{
"number": "5",
"name": "P1",
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{
"number": "6",
"name": "P2",
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{
"number": "7",
"name": "P3",
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{
"number": "8",
"name": "GND",
"type": "power_in",
"description": "Ground."
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{
"number": "9",
"name": "P4",
"type": "bidirectional",
"description": "P-port input/output with push-pull design structure."
},
{
"number": "10",
"name": "P5",
"type": "bidirectional",
"description": "P-port input/output with push-pull design structure."
},
{
"number": "11",
"name": "P6",
"type": "bidirectional",
"description": "P-port input/output with push-pull design structure."
},
{
"number": "12",
"name": "P7",
"type": "bidirectional",
"description": "P-port input/output with push-pull design structure."
},
{
"number": "13",
"name": "INT",
"type": "output",
"description": "Open-drain active-low interrupt output that must be connected to VCC through a pullup resistor."
},
{
"number": "14",
"name": "SCL",
"type": "input",
"description": "Serial clock bus input that must be connected to VCC through a pullup resistor."
},
{
"number": "15",
"name": "SDA",
"type": "bidirectional",
"description": "Serial data bus that must be connected to VCC through a pullup resistor."
},
{
"number": "16",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, 2.3 V to 5.5 V recommended operating range."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
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"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 orderable addendum (pages 26-28) does not list PCA9554APWR or any PW package. The PW (TSSOP-16) ; The pin table header groups 'QSOP (DBQ)' with the SOIC, SSOP, TSSOP and TVSOP column. The pin-out fi"
],
"pages_sent": 12,
"cost_usd": 0.1165,
"at": "2026-10-26T18:44:56"
},
"datasheet": {
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"pages": 42,
"sha256": "73abe48bc529881d",
"source_tier": "mfr"
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"pins": {
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"described": 16,
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}
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{
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"metadata": {
"specs": {
"Manufacturer": "Texas Instruments",
"Package": "TSSOP-16",
"Category": "Communication Interface Chip",
"Pins": "16"
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"rows": [
{
"name": "Supply voltage",
"symbol": "VCC",
"kind": "recommended_operating",
"unit": "V",
"min": 2.3,
"typ": null,
"max": 5.5,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "High-level input voltage A2–A0, P7–P0",
"symbol": "VIH",
"kind": "recommended_operating",
"unit": "V",
"min": 2,
"typ": null,
"max": 5.5,
"conditions": "A2–A0, P7–P0",
"source_page": 5,
"source": "datasheet"
},
{
"name": "High-level input voltage SCL, SDA (min 0.7 × VCC, max VCC)",
"symbol": "VIH",
"kind": "recommended_operating",
"unit": "V",
"min": 0.7,
"typ": null,
"max": 1,
"conditions": "SCL, SDA; min printed as 0.7 × VCC, max printed as VCC (values are multipliers of VCC)",
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{
"name": "Low-level input voltage SCL, SDA",
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"unit": "V",
"min": -0.5,
"typ": null,
"max": 0.3,
"conditions": "SCL, SDA; max printed as 0.3 × VCC (multiplier of VCC)",
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{
"name": "Low-level input voltage A2–A0, P7–P0",
"symbol": "VIL",
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"min": -0.5,
"typ": null,
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{
"name": "High-level output current P7–P0",
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"kind": "recommended_operating",
"unit": "mA",
"min": null,
"typ": null,
"max": -10,
"conditions": "P7–P0",
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{
"name": "Low-level output current P7–P0",
"symbol": "IOL",
"kind": "recommended_operating",
"unit": "mA",
"min": null,
"typ": null,
"max": 25,
"conditions": "P7–P0",
"source_page": 5,
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},
{
"name": "Operating free-air temperature",
"symbol": "TA",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "",
"source_page": 5,
"source": "datasheet"
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{
"name": "Supply voltage range",
"symbol": "VCC",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Input voltage range",
"symbol": "VI",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Output voltage range",
"symbol": "VO",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Input clamp current",
"symbol": "IIK",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": -20,
"conditions": "VI < 0",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Output clamp current",
"symbol": "IOK",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": -20,
"conditions": "VO < 0",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Input/output clamp current",
"symbol": "IIOK",
"kind": "absolute_maximum",
"unit": "mA",
"min": -20,
"typ": null,
"max": 20,
"conditions": "VO < 0 or VO > VCC",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Continuous output low current",
"symbol": "IOL",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 50,
"conditions": "VO = 0 to VCC",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Continuous output high current",
"symbol": "IOH",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": -50,
"conditions": "VO = 0 to VCC",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Continuous current through GND",
"symbol": "ICC",
"kind": "absolute_maximum",
"unit": "mA",
"min": -250,
"typ": null,
"max": null,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Continuous current through VCC",
"symbol": "ICC",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 160,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Storage temperature range",
"symbol": "Tstg",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
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"source": "datasheet"
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{
"name": "ESD HBM",
"symbol": "V(ESD)",
"kind": "absolute_maximum",
"unit": "V",
"min": 0,
"typ": null,
"max": 2000,
"conditions": "Human body model, all pins",
"source_page": 5,
"source": "datasheet"
},
{
"name": "ESD CDM",
"symbol": "V(ESD)",
"kind": "absolute_maximum",
"unit": "V",
"min": 0,
"typ": null,
"max": 1000,
"conditions": "Charged device model, all pins",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Junction-to-ambient thermal resistance (PW)",
"symbol": "RθJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 122,
"max": null,
"conditions": "PW (TSSOP) 16 pins",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Input diode clamp voltage",
"symbol": "VIK",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": -1.2,
"conditions": "II = –18 mA, VCC 2.3 V to 5.5 V",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Power-on reset voltage, VCC rising",
"symbol": "VPORR",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 1.2,
"max": 1.5,
"conditions": "VI = VCC or GND, IO = 0",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Power-on reset voltage, VCC falling",
"symbol": "VPORF",
"kind": "electrical",
"unit": "V",
"min": 0.75,
"typ": null,
"max": 1,
"conditions": "VI = VCC or GND, IO = 0",
"source_page": 6,
"source": "datasheet"
},
{
"name": "P-port high-level output voltage",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 1.8,
"typ": null,
"max": null,
"conditions": "IOH = –8 mA, VCC 2.3 V",
"source_page": 6,
"source": "datasheet"
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{
"name": "P-port high-level output voltage",
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"min": 2.6,
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"max": null,
"conditions": "IOH = –8 mA, VCC 3 V",
"source_page": 6,
"source": "datasheet"
},
{
"name": "P-port high-level output voltage",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 3.1,
"typ": null,
"max": null,
"conditions": "IOH = –8 mA, VCC 4.5 V",
"source_page": 6,
"source": "datasheet"
},
{
"name": "P-port high-level output voltage",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 4.1,
"typ": null,
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"conditions": "IOH = –8 mA, VCC 4.75 V",
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"source": "datasheet"
},
{
"name": "P-port high-level output voltage",
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"min": 1.7,
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{
"name": "P-port high-level output voltage",
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{
"name": "P-port high-level output voltage",
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{
"name": "P-port high-level output voltage",
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{
"name": "SDA low-level output current",
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"conditions": "SDA, VOL = 0.4 V, VCC 2.3 V to 5.5 V",
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{
"name": "P port low-level output current",
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{
"name": "P port low-level output current",
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"name": "P port low-level output current",
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"name": "P port low-level output current",
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{
"name": "P port low-level output current",
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{
"name": "P port low-level output current",
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"source": "datasheet"
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{
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