component
HT34118ANZ
Public Made by Adomby adom
HTCSEMI Audio Interface ICs, DIP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"title": "HT34118ANZ",
"brief": "HTCSEMI Audio Interface ICs, DIP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
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"component": {
"mpn": "HT34118ANZ",
"manufacturer": "HTCSEMI",
"package": "DIP-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": {
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"footprint": "ht34118anz.kicad_mod",
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"model_3d_plain": "ht34118anz-etched.glb",
"model_3d_step": "ht34118anz-etched.step",
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"lbr": "ht34118anz.lbr"
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"distributor_links": {
"lcsc": "C2998008"
},
"distributor_check": {
"checked_at": "2026-10-24T00:24:00Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"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 at about 5.0 mA; as VCC falls from 3.5 to 2.8 V an AGC circuit reduces 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 for 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 with max signal level 350 mVrms and 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 without affecting the rest of the circuit."
},
{
"number": "13",
"name": "VLC",
"type": "input",
"description": "Volume control input: when VLC = VB the receive attenuator is at maximum gain in receive mode, and at 0.3 VB the receive gain is down 35 dB; no effect in 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 with max input level 350 mVrms and 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": {
"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: MPN suffix 'NZ' is not listed in the ordering information (only HT34118AN plastic and HT34118ARW SOI; Pin types for passive RC pins (CT, CPT, CPR) and VB (power_out) are inferred from the descriptions. ; The datasheet is inconsistent about VCC. The maximum ratings table says 'Supply Voltage (Pin 14)', b"
],
"pages_sent": 14,
"cost_usd": 0.154,
"at": "2026-10-24T00:23:43"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/fec1cc60d36f5c5297ad0dc504fb9abd.pdf",
"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"
},
"models_3d": [
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"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "body on z = 0, through-hole leads below",
"extents_mm": [
7.874,
35.56,
6.98
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"zmin_mm": -3.3,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "7bf4503e368ad9b7a3eddfa94bc8dee656da5d6921b677e17307b3d7f29177ab",
"checked": "2026-10-24",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
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"checked": "2026-10-24",
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}
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},
"metadata": {
"specs": {
"Manufacturer": "HTCSEMI",
"Package": "DIP-28",
"Category": "Communication Interface Chip/UART/485/232",
"Pins": "28"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "0954d559d744c7b267825f9f3e4c6af176fe1e1d10493cedb44516f079026bc2",
"rows": [
{
"name": "VCC Supply Current (CD=0.8V)",
"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 (CD=2.0V)",
"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",
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"source": "datasheet"
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{
"name": "CD Input High Voltage",
"symbol": "VCDH",
"kind": "electrical",
"unit": "V",
"min": 2,
"typ": null,
"max": 6.5,
"conditions": "VCC = VCD = 6.5 V; max printed as VCC",
"source_page": 9,
"source": "datasheet"
},
{
"name": "CD Input Low Voltage",
"symbol": "VCDL",
"kind": "electrical",
"unit": "V",
"min": 0,
"typ": null,
"max": 0.8,
"conditions": "VCC = VCD = 6.5 V",
"source_page": 9,
"source": "datasheet"
},
{
"name": "VB Output Voltage",
"symbol": "VB",
"kind": "electrical",
"unit": "V",
"min": 13.5,
"typ": null,
"max": 3,
"conditions": "",
"source_page": 9,
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{
"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": "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=3.5V vs 5.0V",
"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=2.8V vs 5.0V",
"symbol": "ΔGRX2",
"kind": "electrical",
"unit": "dB",
"min": null,
"typ": null,
"max": -15,
"conditions": "@25°C",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Idle Mode Receive 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",
"symbol": "ΔGRX3",
"kind": "electrical",
"unit": "dB",
"min": 49,
"typ": null,
"max": 54,
"conditions": "Range (Rx to Tx Mode), @25°C",
"source_page": 9,
"source": "datasheet"
},
{
"name": "ΔRXO DC Voltage",
"symbol": "ΔVRXO",
"kind": "electrical",
"unit": "mV",
"min": -190,
"typ": null,
"max": 190,
"conditions": "Rx to Tx Mode",
"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": "RXO Low Voltage",
"symbol": "VRXOL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": -0.75,
"conditions": "IOUT=+1.0 mA, RXI=VB-1.0V, VCT=2.6 V; measured with respect to VB (printed VB-0.75)",
"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 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",
"symbol": "ΔGTXI",
"kind": "electrical",
"unit": "dB",
"min": 49,
"typ": null,
"max": 54,
"conditions": "Range (Tx to Rx Mode), @25°C",
"source_page": 10,
"source": "datasheet"
},
{
"name": "ΔTXO DC Voltage",
"symbol": "ΔVTXO",
"kind": "electrical",
"unit": "mV",
"min": -190,
"typ": null,
"max": 190,
"conditions": "Tx to Rx Mode",
"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": "TXO Low Voltage",
"symbol": "VTXOL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": -0.75,
"conditions": "IOUT=+1.0 mA, TXI=VB-1.0V, VCT=1.6 V; measured with respect to VB (printed VB-0.75)",
"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",
"symbol": "ICTR",
"kind": "electrical",
"unit": "µA",
"min": -106,
"typ": null,
"max": -30,
"conditions": "f=1 kHz, VLC=VB=CT, switching to Rx mode",
"source_page": 10,
"source": "datasheet"
},
{
"name": "CT Sink Current",
"symbol": "ICTT",
"kind": "electrical",
"unit": "µA",
"min": 30,
"typ": null,
"max": 106,
"conditions": "f=1 kHz, VLC=VB=CT, switching to Tx mode",
"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": "Mic 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": "Mic Amp Output High Voltage",
"symbol": "VMCOH",
"kind": "electrical",
"unit": "V",
"min": 2.8,
"typ": null,
"max": null,
"conditions": "IOUT=-1.0 mA, VMCI=VB+1.5 V",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Mic Amp Output Low Voltage",
"symbol": "VMCOL",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": null,
"max": 250,
"conditions": "IOUT=1.0 mA, VMCI=VB-1.0 V",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Muting (ΔGain)",
"symbol": "GMT",
"kind": "electrical",
"unit": "dB",
"min": 52,
"typ": null,
"max": null,
"conditions": "f=1.0 kHz, VMCI=150 mV, 0.8 V ≤ VMUT ≤ 2.0 V",
"source_page": 10,
"source": "datasheet"
},
{
"name": "MUT Input Resistance",
"symbol": "RMUT",
"kind": "electrical",
"unit": "kΩ",
"min": 37.5,
"typ": null,
"max": null,
"conditions": "VCC=VMUT=6.5 V",
"source_page": 10,
"source": "datasheet"
},
{
"name": "MUT Input High",
"symbol": "VMUTH",
"kind": "electrical",
"unit": "V",
"min": 2,
"typ": null,
"max": 6.5,
"conditions": "max printed as VCC",
"source_page": 10,
"source": "datasheet"
},
{
"name": "MUT Input Low",
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