component
SN74HC138QPWRQ1
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746
{
"schema_version": 1,
"type": "component",
"slug": "sn74hc138qpwrq1",
"title": "SN74HC138QPWRQ1",
"brief": "Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-16. 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",
"logic",
"sn74hc138qpwrq1",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "SN74HC138QPWRQ1",
"manufacturer": "Texas Instruments",
"package": "TSSOP-16",
"pin_count": 16,
"category": "Logic",
"subcategory": "Signal Switches, Multiplexers, Decoders",
"datasheet": "https://www.ti.com/lit/ds/symlink/sn74hc138qpwrq1.pdf",
"parts": {
"symbol": "sn74hc138qpwrq1.kicad_sym",
"footprint": "sn74hc138qpwrq1.kicad_mod",
"model_3d": "sn74hc138qpwrq1-hero.glb",
"model_3d_plain": "sn74hc138qpwrq1-etched.glb",
"model_3d_step": "sn74hc138qpwrq1-etched.step",
"model_3d_step_plain": "sn74hc138qpwrq1.step",
"lbr": "sn74hc138qpwrq1.lbr"
},
"distributor_links": {
"lcsc": "C2674574",
"mouser": "595-SN74HC138QPWRQ1"
},
"distributor_check": {
"checked_at": "2026-10-27T18:34:55Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "quota"
},
"mouser": {
"pn": "595-SN74HC138QPWRQ1",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "A",
"type": "input",
"description": "Binary-select input A; together with B and C it selects which one of the eight outputs goes low when the device is enabled."
},
{
"number": "2",
"name": "B",
"type": "input",
"description": "Binary-select input B; together with A and C it selects which one of the eight outputs goes low when the device is enabled."
},
{
"number": "3",
"name": "C",
"type": "input",
"description": "Binary-select input C; together with A and B it selects which one of the eight outputs goes low when the device is enabled."
},
{
"number": "4",
"name": "G2A",
"type": "input",
"description": "Active-low enable input; the decoder is enabled only when G2A and G2B are low and G1 is high."
},
{
"number": "5",
"name": "G2B",
"type": "input",
"description": "Active-low enable input; the decoder is enabled only when G2A and G2B are low and G1 is high."
},
{
"number": "6",
"name": "G1",
"type": "input",
"description": "Active-high enable input; it must be high, with G2A and G2B low, for the selected output to go low."
},
{
"number": "7",
"name": "Y7",
"type": "output",
"description": "Active-low decoded output Y7, high unless selected by the binary inputs while the device is enabled."
},
{
"number": "8",
"name": "GND",
"type": "power_in",
"description": "Ground reference for the device."
},
{
"number": "9",
"name": "Y6",
"type": "output",
"description": "Active-low decoded output Y6, high unless selected by the binary inputs while the device is enabled."
},
{
"number": "10",
"name": "Y5",
"type": "output",
"description": "Active-low decoded output Y5, high unless selected by the binary inputs while the device is enabled."
},
{
"number": "11",
"name": "Y4",
"type": "output",
"description": "Active-low decoded output Y4, high unless selected by the binary inputs while the device is enabled."
},
{
"number": "12",
"name": "Y3",
"type": "output",
"description": "Active-low decoded output Y3, high unless selected by the binary inputs while the device is enabled."
},
{
"number": "13",
"name": "Y2",
"type": "output",
"description": "Active-low decoded output Y2, high unless selected by the binary inputs while the device is enabled."
},
{
"number": "14",
"name": "Y1",
"type": "output",
"description": "Active-low decoded output Y1, high unless selected by the binary inputs while the device is enabled."
},
{
"number": "15",
"name": "Y0",
"type": "output",
"description": "Active-low decoded output Y0, high unless selected by the binary inputs while the device is enabled."
},
{
"number": "16",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, specified for 2 V to 6 V operation with respect to GND."
}
],
"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: Pin numbers and names are taken from the top-view drawing on page 1 for the D/PW package. Pin descri"
],
"pages_sent": 15,
"cost_usd": 0.0378,
"at": "2026-10-27T18:34:33"
},
"datasheet": {
"url": "https://www.ti.com/lit/ds/symlink/sn74hc138qpwrq1.pdf",
"pages": 15,
"sha256": "90668a3816425c57",
"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": "sn74hc138qpwrq1.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.4,
5,
1.1
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "sn74hc138qpwrq1-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.4,
5,
1.1
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "0d84333d489626f3f14edf0131528085289df56e981d6963544a8910b76a0f80",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Texas Instruments",
"Package": "TSSOP-16",
"Category": "Logic",
"Pins": "16"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "90668a3816425c57408981c2d2e0fb66b5a962fc170fa5fb19ec954efbbea530",
"rows": [
{
"name": "Supply voltage",
"symbol": "VCC",
"kind": "recommended_operating",
"unit": "V",
"min": 2,
"typ": 5,
"max": 6,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "High-level input voltage",
"symbol": "VIH",
"kind": "recommended_operating",
"unit": "V",
"min": 1.5,
"typ": null,
"max": null,
"conditions": "VCC = 2 V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "High-level input voltage",
"symbol": "VIH",
"kind": "recommended_operating",
"unit": "V",
"min": 3.15,
"typ": null,
"max": null,
"conditions": "VCC = 4.5 V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "High-level input voltage",
"symbol": "VIH",
"kind": "recommended_operating",
"unit": "V",
"min": 4.2,
"typ": null,
"max": null,
"conditions": "VCC = 6 V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Low-level input voltage",
"symbol": "VIL",
"kind": "recommended_operating",
"unit": "V",
"min": null,
"typ": null,
"max": 0.5,
"conditions": "VCC = 2 V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Low-level input voltage",
"symbol": "VIL",
"kind": "recommended_operating",
"unit": "V",
"min": null,
"typ": null,
"max": 1.35,
"conditions": "VCC = 4.5 V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Low-level input voltage",
"symbol": "VIL",
"kind": "recommended_operating",
"unit": "V",
"min": null,
"typ": null,
"max": 1.8,
"conditions": "VCC = 6 V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Input voltage",
"symbol": "VI",
"kind": "recommended_operating",
"unit": "V",
"min": 0,
"typ": null,
"max": null,
"conditions": "maximum is VCC",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Output voltage",
"symbol": "VO",
"kind": "recommended_operating",
"unit": "V",
"min": 0,
"typ": null,
"max": null,
"conditions": "maximum is VCC",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Input transition rise/fall time",
"symbol": "∆t/∆v",
"kind": "recommended_operating",
"unit": "ns",
"min": null,
"typ": null,
"max": 1000,
"conditions": "VCC = 2 V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Input transition rise/fall time",
"symbol": "∆t/∆v",
"kind": "recommended_operating",
"unit": "ns",
"min": null,
"typ": null,
"max": 500,
"conditions": "VCC = 4.5 V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Input transition rise/fall time",
"symbol": "∆t/∆v",
"kind": "recommended_operating",
"unit": "ns",
"min": null,
"typ": null,
"max": 400,
"conditions": "VCC = 6 V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Operating free-air temperature",
"symbol": "TA",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Supply voltage range",
"symbol": "VCC",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 7,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Input clamp current",
"symbol": "IIK",
"kind": "absolute_maximum",
"unit": "mA",
"min": -20,
"typ": null,
"max": 20,
"conditions": "VI < 0 or VI > VCC",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Output clamp current",
"symbol": "IOK",
"kind": "absolute_maximum",
"unit": "mA",
"min": -20,
"typ": null,
"max": 20,
"conditions": "VO < 0 or VO > VCC",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Continuous output current",
"symbol": "IO",
"kind": "absolute_maximum",
"unit": "mA",
"min": -25,
"typ": null,
"max": 25,
"conditions": "VO = 0 to VCC",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Continuous current through VCC or GND",
"symbol": "",
"kind": "absolute_maximum",
"unit": "mA",
"min": -50,
"typ": null,
"max": 50,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Package thermal impedance PW package",
"symbol": "θJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": null,
"max": 108,
"conditions": "PW package, see Note 2",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Storage temperature range",
"symbol": "Tstg",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "High-level output voltage",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 1.9,
"typ": null,
"max": null,
"conditions": "VCC = 2 V; IOH = −20 µA; VI = VIH or VIL",
"source_page": 4,
"source": "datasheet"
},
{
"name": "High-level output voltage",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 4.4,
"typ": null,
"max": null,
"conditions": "VCC = 4.5 V; IOH = −20 µA; VI = VIH or VIL",
"source_page": 4,
"source": "datasheet"
},
{
"name": "High-level output voltage",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 5.9,
"typ": null,
"max": null,
"conditions": "VCC = 6 V; IOH = −20 µA; VI = VIH or VIL",
"source_page": 4,
"source": "datasheet"
},
{
"name": "High-level output voltage",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 3.7,
"typ": null,
"max": null,
"conditions": "VCC = 4.5 V; IOH = −4 mA; VI = VIH or VIL",
"source_page": 4,
"source": "datasheet"
},
{
"name": "High-level output voltage",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 5.2,
"typ": null,
"max": null,
"conditions": "VCC = 6 V; IOH = −5.2 mA; VI = VIH or VIL",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Low-level output voltage",
"symbol": "VOL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.1,
"conditions": "VCC = 2 V; IOL = 20 µA; VI = VIH or VIL",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Low-level output voltage",
"symbol": "VOL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.4,
"conditions": "VCC = 4.5 V; IOL = 4 mA; VI = VIH or VIL",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Input current",
"symbol": "II",
"kind": "electrical",
"unit": "nA",
"min": -1000,
"typ": null,
"max": 1000,
"conditions": "VCC = 6 V; VI = VCC or 0",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Supply current",
"symbol": "ICC",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 160,
"conditions": "VCC = 6 V; VI = VCC or 0, IO = 0",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Input capacitance",
"symbol": "Ci",
"kind": "electrical",
"unit": "pF",
"min": null,
"typ": null,
"max": 10,
"conditions": "VCC = 2 V to 6 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Propagation delay A, B, or C to any Y",
"symbol": "tpd",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 270,
"conditions": "VCC = 2 V; CL = 50 pF",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Propagation delay A, B, or C to any Y",
"symbol": "tpd",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 54,
"conditions": "VCC = 4.5 V; CL = 50 pF",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Propagation delay A, B, or C to any Y",
"symbol": "tpd",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 46,
"conditions": "VCC = 6 V; CL = 50 pF",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Propagation delay enable to any Y",
"symbol": "tpd",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 235,
"conditions": "VCC = 2 V; CL = 50 pF",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Propagation delay enable to any Y",
"symbol": "tpd",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 47,
"conditions": "VCC = 4.5 V; CL = 50 pF",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Propagation delay enable to any Y",
"symbol": "tpd",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 40,
"conditions": "VCC = 6 V; CL = 50 pF",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Output transition time",
"symbol": "tt",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 110,
"conditions": "VCC = 2 V; CL = 50 pF",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Output transition time",
"symbol": "tt",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 22,
"conditions": "VCC = 4.5 V; CL = 50 pF",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Output transition time",
"symbol": "tt",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 19,
"conditions": "VCC = 6 V; CL = 50 pF",
"source_page": 4,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"sn74hc138qpwrq1"
],
"discovery_pitch": "SN74HC138QPWRQ1 (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"sn74hc138qpwrq1.kicad_sym",
"sn74hc138qpwrq1.kicad_mod",
"sn74hc138qpwrq1.glb",
"sn74hc138qpwrq1.step",
"sn74hc138qpwrq1.lbr",
"docs/hero.png",
"docs/sn74hc138qpwrq1-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"sn74hc138qpwrq1-hero.glb",
"sn74hc138qpwrq1-hero.overlay.json",
"sn74hc138qpwrq1-etched.glb"
],
"visibility": {
"public": true
}
}