component
HT34118ARWZ
Public Made by Adomby adom
HTCSEMI Audio Interface ICs, SOP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"title": "HT34118ARWZ",
"brief": "HTCSEMI Audio Interface ICs, SOP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
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"component": {
"mpn": "HT34118ARWZ",
"manufacturer": "HTCSEMI",
"package": "SOP-28",
"pin_count": 28,
"category": "Communication Interface Chip/UART/485/232",
"subcategory": "Audio Interface ICs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/fec1cc60d36f5c5297ad0dc504fb9abd.pdf",
"parts": {
"symbol": "ht34118arwz.kicad_sym",
"footprint": "ht34118arwz.kicad_mod",
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"distributor_links": {
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"distributor_check": {
"checked_at": "2026-10-22T20:59:05Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "quota"
},
"mouser": {
"pn": null,
"status": "quota"
}
},
"pins": [
{
"number": "1",
"name": "FO",
"type": "output",
"description": "Filter output with output impedance less than 50 Ω."
},
{
"number": "2",
"name": "FI",
"type": "input",
"description": "Filter input with input impedance greater than 1.0 MΩ."
},
{
"number": "3",
"name": "CD",
"type": "input",
"description": "Chip Disable: logic low (<0.8 V) sets normal operation, logic high (>2.0 V) powers down the IC; input impedance nominally 90 kΩ."
},
{
"number": "4",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage of +2.8 to +6.5 V is required at about 5.0 mA; as VCC falls from 3.5 to 2.8 V an AGC reduces the receive attenuator gain by about 25 dB in receive mode."
},
{
"number": "5",
"name": "HTO+",
"type": "output",
"description": "Output of the second hybrid amplifier with gain internally set at -1.0, giving a differential output with HTO- to the hybrid transformer."
},
{
"number": "6",
"name": "HTO-",
"type": "output",
"description": "Output of the first hybrid amplifier, with gain set by external resistors."
},
{
"number": "7",
"name": "HTI",
"type": "input",
"description": "Input and summing node of the first hybrid amplifier; DC level is about VB."
},
{
"number": "8",
"name": "TXO",
"type": "output",
"description": "Output of the transmit attenuator; DC level is approximately VB."
},
{
"number": "9",
"name": "TXI",
"type": "input",
"description": "Input to the transmit attenuator; max signal level 350 mVrms, input impedance about 10 kΩ."
},
{
"number": "10",
"name": "MCO",
"type": "output",
"description": "Output of the microphone amplifier, with gain set by external resistors."
},
{
"number": "11",
"name": "MCI",
"type": "input",
"description": "Input and summing node of the microphone amplifier; DC level is about VB."
},
{
"number": "12",
"name": "MUT",
"type": "input",
"description": "Mute input: logic low (<0.8 V) sets normal operation, logic high (>2.0 V) mutes the microphone amplifier; ground if unused."
},
{
"number": "13",
"name": "VLC",
"type": "input",
"description": "Volume control input: at VLC = VB the receive attenuator is at maximum gain in receive mode, at 0.3 VB the receive gain is down 35 dB; no effect on transmit mode."
},
{
"number": "14",
"name": "CT",
"type": "passive",
"description": "An RC at this pin sets the response time for the circuit to switch modes."
},
{
"number": "15",
"name": "VB",
"type": "power_out",
"description": "Output voltage of about VCC/2 serving as system AC ground and biasing the volume control; a filter capacitor is required."
},
{
"number": "16",
"name": "CPT",
"type": "passive",
"description": "An RC at this pin sets the time constant for the transmit background monitor."
},
{
"number": "17",
"name": "TLI2",
"type": "input",
"description": "Input to the transmit level detector on the mike/speaker side."
},
{
"number": "18",
"name": "TLO2",
"type": "output",
"description": "Output of the transmit level detector on the mike/speaker side and input to the transmit background monitor."
},
{
"number": "19",
"name": "RLO2",
"type": "output",
"description": "Output of the receive level detector on the mike/speaker side."
},
{
"number": "20",
"name": "RLI2",
"type": "input",
"description": "Input to the receive level detector on the mike/speaker side."
},
{
"number": "21",
"name": "RXI",
"type": "input",
"description": "Input to the receive attenuator and dial tone detector; max input level 350 mVrms, input impedance about 10 kΩ."
},
{
"number": "22",
"name": "RXO",
"type": "output",
"description": "Output of the receive attenuator; DC level is approximately VB."
},
{
"number": "23",
"name": "TLI1",
"type": "input",
"description": "Input to the transmit level detector on the line side."
},
{
"number": "24",
"name": "TLO1",
"type": "output",
"description": "Output of the transmit level detector on the line side."
},
{
"number": "25",
"name": "RLO1",
"type": "output",
"description": "Output of the receive level detector on the line side and input to the receive background monitor."
},
{
"number": "26",
"name": "RLI1",
"type": "input",
"description": "Input to the receive level detector on the line side."
},
{
"number": "27",
"name": "CPR",
"type": "passive",
"description": "An RC at this pin sets the time constant for the receive background monitor."
},
{
"number": "28",
"name": "GND",
"type": "power_in",
"description": "Ground pin for the entire IC."
}
],
"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: Ordering info lists HT34118ARW (SOIC) while the MPN is HT34118ARWZ; the Z suffix is not explained, a; Pin 12 MUT description says input impedance is nominally 90 Ω (likely a typo for 90 kΩ); the electri; Types for passive RC pins (CT, CPT, CPR) and VB (power_out) are judgement calls."
],
"pages_sent": 14,
"cost_usd": 0.153,
"at": "2026-10-22T20:58:42"
},
"datasheet": {
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"pages": 14,
"sha256": "0954d559d744c7b2",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 28,
"described": 28,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
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"footprint": "viewers/footprint.html"
},
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"seat": "z = 0",
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"zmin_mm": 0,
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"footprint_binding": "identity",
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"checked": "2026-10-22",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
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}
]
},
"metadata": {
"specs": {
"Manufacturer": "HTCSEMI",
"Package": "SOP-28",
"Category": "Communication Interface Chip/UART/485/232",
"Pins": "28"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "0954d559d744c7b267825f9f3e4c6af176fe1e1d10493cedb44516f079026bc2",
"rows": [
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"name": "Supply Voltage",
"symbol": "VCC",
"kind": "absolute_maximum",
"unit": "V",
"min": -1,
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"max": 7,
"conditions": "",
"source_page": 8,
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{
"name": "Storage Temperature Range",
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"typ": null,
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"conditions": "Pin 4",
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{
"name": "VB Current",
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"min": null,
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"max": 500,
"conditions": "Pin 15",
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{
"name": "Attenuator Input Signal Voltage",
"symbol": "VIN",
"kind": "recommended_operating",
"unit": "mVrms",
"min": 0,
"typ": null,
"max": 350,
"conditions": "Pins 9, 21",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Microphone Amplifier, Hybrid Amplifier Gain",
"symbol": "G",
"kind": "recommended_operating",
"unit": "dB",
"min": 0,
"typ": null,
"max": 40,
"conditions": "",
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},
{
"name": "Load Current RXO, TXO",
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"typ": null,
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"conditions": "Pins 8, 22",
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{
"name": "Load Current MCO",
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"conditions": "Pin 10",
"source_page": 9,
"source": "datasheet"
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{
"name": "Load Current HTO-, HTO+",
"symbol": "IL",
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"unit": "mA",
"min": 0,
"typ": null,
"max": 5,
"conditions": "Pins 6, 5",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Operating Temperature",
"symbol": "TA",
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"unit": "°C",
"min": -25,
"typ": null,
"max": 70,
"conditions": "",
"source_page": 9,
"source": "datasheet"
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{
"name": "VCC Supply Current",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": null,
"max": 10,
"conditions": "VCC =6.5 V, CD =0.8 V",
"source_page": 9,
"source": "datasheet"
},
{
"name": "VCC Supply Current",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": null,
"max": 1,
"conditions": "VCC =6.5 V, CD =2.0 V",
"source_page": 9,
"source": "datasheet"
},
{
"name": "CD Input Resistance",
"symbol": "RCD",
"kind": "electrical",
"unit": "kΩ",
"min": 37.5,
"typ": null,
"max": null,
"conditions": "VCC = VCD = 6.5 V",
"source_page": 9,
"source": "datasheet"
},
{
"name": "CD Input High Voltage",
"symbol": "VCDH",
"kind": "electrical",
"unit": "V",
"min": 2,
"typ": null,
"max": null,
"conditions": "VCC = VCD = 6.5 V",
"source_page": 9,
"source": "datasheet"
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{
"name": "CD Input Low Voltage",
"symbol": "VCDL",
"kind": "electrical",
"unit": "V",
"min": 0,
"typ": null,
"max": 0.8,
"conditions": "VCC = VCD = 6.5 V",
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"source": "datasheet"
},
{
"name": "Receive Attenuator Gain",
"symbol": "GRX",
"kind": "electrical",
"unit": "dB",
"min": 1.5,
"typ": null,
"max": 10,
"conditions": "Rx Mode, RXI=150 mVrms, VCC=5.0 V, f=1.0 KHz",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Gain Change VCC=3.5 V versus VCC=5.0 V",
"symbol": "ΔGRX1",
"kind": "electrical",
"unit": "dB",
"min": -0.5,
"typ": null,
"max": 0.5,
"conditions": "@25°C",
"source_page": 9,
"source": "datasheet"
},
{
"name": "AGC Gain Change VCC=2.8 V versus VCC=5.0 V",
"symbol": "ΔGRX2",
"kind": "electrical",
"unit": "dB",
"min": null,
"typ": null,
"max": -15,
"conditions": "@25°C",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Receive Attenuator Idle Gain",
"symbol": "GRX1",
"kind": "electrical",
"unit": "dB",
"min": -25,
"typ": null,
"max": -15,
"conditions": "Idle Mode, RXI=150mVrms",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Receive Attenuator Range (Rx to Tx Mode)",
"symbol": "ΔGRX3",
"kind": "electrical",
"unit": "dB",
"min": 49,
"typ": null,
"max": 54,
"conditions": "@25°C",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Volume Control Range",
"symbol": "VCR",
"kind": "electrical",
"unit": "dB",
"min": 27,
"typ": null,
"max": null,
"conditions": "Rx Mode, 0.3VB<VLC<VB",
"source_page": 9,
"source": "datasheet"
},
{
"name": "ΔRXO DC Voltage Rx to Tx Mode",
"symbol": "ΔVRXO",
"kind": "electrical",
"unit": "mV",
"min": -190,
"typ": null,
"max": 190,
"conditions": "",
"source_page": 10,
"source": "datasheet"
},
{
"name": "RXO High Voltage",
"symbol": "VRXOH",
"kind": "electrical",
"unit": "V",
"min": 2.8,
"typ": null,
"max": null,
"conditions": "IOUT= -1.0 mA,RXI=VB+1.5V, VCT=2.6 V",
"source_page": 10,
"source": "datasheet"
},
{
"name": "RXI Input Resistance",
"symbol": "RRXI",
"kind": "electrical",
"unit": "kΩ",
"min": 5.25,
"typ": null,
"max": 17.5,
"conditions": "RXI=350 mVrms, f = 1.0 KHz",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Transmit Attenuator Gain",
"symbol": "GTX",
"kind": "electrical",
"unit": "dB",
"min": 1.5,
"typ": null,
"max": 10,
"conditions": "Tx Mode, TXI=150 mVrms, f=1.0 KHz",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Transmit Attenuator Idle Gain",
"symbol": "GTXI",
"kind": "electrical",
"unit": "dB",
"min": -25,
"typ": null,
"max": -15,
"conditions": "Idle Mode, RXI=-150 mVrms",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Transmit Attenuator Range (Tx to Rx Mode)",
"symbol": "ΔGTXI",
"kind": "electrical",
"unit": "dB",
"min": 49,
"typ": null,
"max": 54,
"conditions": "@25°C",
"source_page": 10,
"source": "datasheet"
},
{
"name": "ΔTXO DC Voltage Tx to Rx Mode",
"symbol": "ΔVTXO",
"kind": "electrical",
"unit": "mV",
"min": -190,
"typ": null,
"max": 190,
"conditions": "",
"source_page": 10,
"source": "datasheet"
},
{
"name": "TXO High Voltage",
"symbol": "VTXOH",
"kind": "electrical",
"unit": "V",
"min": 2.8,
"typ": null,
"max": null,
"conditions": "IOUT= -1.0 mA,TXI=VB+1.5V, VCT=1.6 V",
"source_page": 10,
"source": "datasheet"
},
{
"name": "TXI Input Resistance",
"symbol": "RTXI",
"kind": "electrical",
"unit": "kΩ",
"min": 5.25,
"typ": null,
"max": 17.5,
"conditions": "TXI=350 mVrms, f = 1.0 KHz",
"source_page": 10,
"source": "datasheet"
},
{
"name": "CT Source Current (switching to Rx mode)",
"symbol": "ICTR",
"kind": "electrical",
"unit": "µA",
"min": -106,
"typ": null,
"max": -30,
"conditions": "f = 1 KHz, VLC = VB =CT",
"source_page": 10,
"source": "datasheet"
},
{
"name": "CT Sink Current (switching to Tx mode)",
"symbol": "ICTT",
"kind": "electrical",
"unit": "µA",
"min": 30,
"typ": null,
"max": 106,
"conditions": "f = 1 KHz, VLC = VB =CT",
"source_page": 10,
"source": "datasheet"
},
{
"name": "CT Fast Idle Internal Resistance",
"symbol": "RFI",
"kind": "electrical",
"unit": "kΩ",
"min": 1.5,
"typ": null,
"max": 3.6,
"conditions": "@25°C",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Dial Tone Detector Threshold",
"symbol": "VDT",
"kind": "electrical",
"unit": "mV",
"min": 10,
"typ": null,
"max": 20,
"conditions": "@25°C",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Microphone Amp Output Offset",
"symbol": "MCOVOS",
"kind": "electrical",
"unit": "mV",
"min": -62,
"typ": null,
"max": 62,
"conditions": "VMCO - VB, Feedback R= 180 KΩ",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Microphone Amp Open Loop Gain",
"symbol": "AVOLM",
"kind": "electrical",
"unit": "dB",
"min": 60,
"typ": null,
"max": null,
"conditions": "f = 100 Hz",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Microphone Amp Output High Voltage",
"symbol": "VMCOH",
"kind": "electrical",
"unit": "V",
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