component
PAC1944T-E
Public Made by Adomby adom
Microchip Tech Supervisor And Reset ICs, WLCSP-16(2.2x2.2). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "pac1944t-e",
"version": "0.1.0",
"type": "component",
"description": "Microchip Tech Supervisor And Reset ICs, WLCSP-16(2.2x2.2). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"power management (pmic)",
"pac1944t-e",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"pac1944t-e.kicad_sym",
"pac1944t-e.kicad_mod",
"pac1944t-e.glb",
"pac1944t-e.step",
"pac1944t-e.lbr",
"docs/hero.png",
"docs/pac1944t-e-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"pac1944t-e-hero.glb",
"pac1944t-e-hero.overlay.json",
"pac1944t-e-etched.glb"
],
"component": {
"mpn": "PAC1944T-E",
"manufacturer": "Microchip Tech",
"package": "WLCSP-16(2.2x2.2)",
"pin_count": 16,
"category": "Power Management (PMIC)",
"subcategory": "Supervisor And Reset ICs",
"datasheet": "https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/PAC194X-Data-Sheet-20006543A.pdf",
"parts": {
"symbol": "pac1944t-e.kicad_sym",
"footprint": "pac1944t-e.kicad_mod",
"model_3d": "pac1944t-e-hero.glb",
"model_3d_plain": "pac1944t-e-etched.glb",
"model_3d_step": "pac1944t-e-etched.step",
"model_3d_step_plain": "pac1944t-e.step",
"lbr": "pac1944t-e.lbr"
},
"distributor_links": {
"lcsc": "C5226659"
},
"distributor_check": {
"checked_at": "2026-11-02T17:13:49Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "C3",
"name": "SLOW/ALERT1",
"type": "bidirectional",
"description": "SLOW input pin: when high, all channels sample at 8 SPS, and the pin may be programmed as the open-drain ALERT1 pin or as a GPIO."
},
{
"number": "A4",
"name": "VDD",
"type": "power_in",
"description": "Positive power supply input for the device, specified at 2.7V to 5.5V and to be bypassed with a 100 nF ceramic capacitor to ground near the IC."
},
{
"number": "B4",
"name": "GND",
"type": "power_in",
"description": "System ground for the IC."
},
{
"number": "C4",
"name": "SCL",
"type": "input",
"description": "SMBus clock input that requires an external pull-up resistor, except in High-Speed mode, which requires a CMOS driver from the host."
},
{
"number": "D4",
"name": "SDA",
"type": "bidirectional",
"description": "Bidirectional SMBus open-drain data pin that requires a pull-up resistor to VDD."
},
{
"number": "C2",
"name": "ADDRSEL",
"type": "passive",
"description": "Address selection pin: a resistor connected from this pin to ground selects the SMBus client address."
},
{
"number": "C1",
"name": "SENSE3-",
"type": "passive",
"description": "Channel 3 differential sense input (0 to FSR), connected to the load side of the sense resistor."
},
{
"number": "D1",
"name": "SENSE3+",
"type": "passive",
"description": "Channel 3 differential sense input (0 to FSR), connected to the supply side of the sense resistor, which also serves as the bus voltage input."
},
{
"number": "D2",
"name": "SENSE4-",
"type": "passive",
"description": "Channel 4 differential sense input (0 to FSR), connected to the load side of the sense resistor."
},
{
"number": "D3",
"name": "SENSE4+",
"type": "passive",
"description": "Channel 4 differential sense input (0 to FSR), connected to the supply side of the sense resistor, which also serves as the bus voltage input."
},
{
"number": "A3",
"name": "SENSE1+",
"type": "passive",
"description": "Channel 1 differential sense input (0 to FSR), connected to the supply side of the sense resistor, which also serves as the bus voltage input."
},
{
"number": "A2",
"name": "SENSE1-",
"type": "passive",
"description": "Channel 1 differential sense input (0 to FSR), connected to the load side of the sense resistor."
},
{
"number": "A1",
"name": "SENSE2+",
"type": "passive",
"description": "Channel 2 differential sense input (0 to FSR), connected to the supply side of the sense resistor, which also serves as the bus voltage input."
},
{
"number": "B1",
"name": "SENSE2-",
"type": "passive",
"description": "Channel 2 differential sense input (0 to FSR), connected to the load side of the sense resistor."
},
{
"number": "B2",
"name": "GPIO/ALERT2",
"type": "bidirectional",
"description": "Defaults to a GPIO input and may be programmed as the open-drain ALERT2 pin or as an open-drain GPIO output, requiring a pull-up resistor to VDD."
},
{
"number": "B3",
"name": "PWRDN",
"type": "input",
"description": "Active-low power-down input that places the device in a Power-Down state in which all circuitry, including SMBus, is powered down."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-haiku-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The datasheet pin table (Table 3-1) covers the PAC194X-1 variants. The marking table lists PAC1944T-"
],
"pages_sent": 35,
"cost_usd": 0.0534,
"at": "2026-11-02T17:13:40"
},
"datasheet": {
"url": "https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/PAC194X-Data-Sheet-20006543A.pdf",
"pages": 96,
"sha256": "e4f3260d6efac29e",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 16,
"described": 16,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "pac1944t-e.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
2.225,
2.17,
0.665
],
"zmin_mm": -0.045,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "f17743f9e914d8da300d9de14ee9637d33970b5fb11acca1d23e91d65871c8f3",
"checked": "2026-11-02",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "pac1944t-e-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
2.225,
2.17,
0.665
],
"zmin_mm": -0.045,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "d14edbd90d4629bcf5ada22e0941eaceb1807d44fb46d789e88bf51b23602ef3",
"checked": "2026-11-02",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}