component
MC34118G-S28-R
Public Made by Adomby adom
UTC(Unisonic Tech) Audio Power OpAmps, SOP-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"name": "FO",
"type": "output",
"description": "Output of the filter, with output impedance less than 50Ω."
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{
"number": "2",
"name": "FI",
"type": "input",
"description": "Input of the filter, with input impedance less than 1MΩ."
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{
"number": "3",
"name": "CD",
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"description": "Chip disable input: logic low below 0.8V sets normal operation and logic high above 2V disables the IC, with a nominal input impedance of 90 kΩ."
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{
"number": "4",
"name": "VCC",
"type": "power_in",
"description": "Requires a supply voltage of +2.8V to +6.5V at 5mA, and an AGC circuit reduces receive attenuator gain by 25dB when VCC falls below 3.5V in receive mode."
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{
"number": "5",
"name": "HTO+",
"type": "output",
"description": "Output of the second hybrid amplifier, whose gain is internally set at -1."
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{
"number": "6",
"name": "HTO-",
"type": "output",
"description": "Output of the first hybrid amplifier, whose gain is set by external resistors."
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{
"number": "7",
"name": "HTI",
"type": "input",
"description": "Input and summing node of the first hybrid amplifier, with DC level about equal to VB."
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{
"number": "8",
"name": "TXO",
"type": "output",
"description": "Output of the transmit attenuator, with DC level about VB."
},
{
"number": "9",
"name": "TXI",
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"description": "Input of the transmit attenuator, with maximum signal level of 350 mVrms and input impedance of 10 kΩ."
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{
"number": "10",
"name": "MCO",
"type": "output",
"description": "Output of the microphone amplifier, whose gain is set by external resistors, with load current of 0 to ±1 mA."
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{
"number": "11",
"name": "MCI",
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"description": "Summing node input of the microphone amplifier, with DC level VB."
},
{
"number": "12",
"name": "MUT",
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"description": "Mute input: logic low below 0.8V gives normal operation and logic high above 2V mutes the microphone amplifier, with input impedance of 90 kΩ."
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{
"number": "13",
"name": "VLC",
"type": "input",
"description": "Volume control input sensed with respect to VB, with recommended operating range 0.3×VB to VB."
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{
"number": "14",
"name": "CT",
"type": "passive",
"description": "Sets the response time for switching modes through the RC network connected at this pin."
},
{
"number": "15",
"name": "VB",
"type": "power_out",
"description": "Outputs about Vcc/2 as the system AC ground that biases the volume control, and requires a filter capacitor."
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{
"number": "16",
"name": "CPT",
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"description": "Sets the time constant for the transmit background noise monitor through the RC at this pin."
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{
"number": "17",
"name": "TLI2",
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"description": "Input to the transmit level detector on the microphone/speaker side."
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{
"number": "18",
"name": "TLO2",
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"description": "Output of the transmit level detector on the microphone/speaker side, and also the input to the transmit background noise monitor."
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{
"number": "19",
"name": "RLO2",
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"description": "Output of the receive level detector on the microphone/speaker side."
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{
"number": "20",
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"description": "Input to the receive level detector on the microphone/speaker side."
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{
"number": "21",
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"type": "input",
"description": "Input to the receive attenuator and dial tone detector, with maximum input level of 350 mVrms and input impedance of 10 kΩ."
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{
"number": "22",
"name": "RXO",
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"description": "Output of the receive attenuator, with DC level VB."
},
{
"number": "23",
"name": "TLI1",
"type": "input",
"description": "Input to the transmit level detector on the line side."
},
{
"number": "24",
"name": "TLO1",
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"description": "Output of the transmit level detector on the line side, and also the input to the transmit background noise monitor."
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{
"number": "25",
"name": "RLO1",
"type": "output",
"description": "Output of the receive level detector on the line side."
},
{
"number": "26",
"name": "RLI1",
"type": "input",
"description": "Input to the receive level detector on the line side."
},
{
"number": "27",
"name": "CPR",
"type": "passive",
"description": "Sets the time constant for the receive background noise monitor through the RC at this pin."
},
{
"number": "28",
"name": "GND",
"type": "power_in",
"description": "Ground."
}
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"extractor flagged: The datasheet lists the ordering code MC34118G-S28-R as SOP-28 tape and reel but does not state a 30; The PIN CONFIGURATION diagram on page 2 prints some names differently from the PIN DESCRIPTION table"
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"at": "2026-10-26T23:45:38"
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"Package": "SOP-28-300mil",
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"name": "Supply Voltage",
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"name": "Voltage at Pin 3",
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"name": "Voltage at Pin 12 (mute)",
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{
"name": "Voltage at Pin 9, Pin 21, and Pin 2",
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"max": null,
"conditions": "Upper limit printed as VCC+0.5",
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{
"name": "Storage Temperature",
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"min": -65,
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"name": "Supply Voltage",
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"name": "Voltage at Pin 3",
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"max": null,
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"name": "Voltage at Pin 12 (MUTE)",
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"max": null,
"conditions": "Upper limit printed as VCC",
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{
"name": "IVB Current (Pin 15)",
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"kind": "recommended_operating",
"unit": "µA",
"min": null,
"typ": null,
"max": 500,
"conditions": "",
"source_page": 5,
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{
"name": "Attenuator Input Signal Voltage at Pin 9, Pin 21",
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"kind": "recommended_operating",
"unit": "mVrms",
"min": null,
"typ": null,
"max": 350,
"conditions": "",
"source_page": 5,
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{
"name": "Load Current RXO, TXO (Pin 8, Pin 22)",
"symbol": "",
"kind": "recommended_operating",
"unit": "mA",
"min": -2,
"typ": null,
"max": 2,
"conditions": "Printed as 0~+-2 mA",
"source_page": 5,
"source": "datasheet"
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{
"name": "Load Current MCO (Pin 10)",
"symbol": "",
"kind": "recommended_operating",
"unit": "mA",
"min": -1,
"typ": null,
"max": 1,
"conditions": "Printed as 0~+-1 mA",
"source_page": 5,
"source": "datasheet"
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{
"name": "Load Current HTO-, HTO+ (Pin 6, Pin 5)",
"symbol": "",
"kind": "recommended_operating",
"unit": "mA",
"min": -0.5,
"typ": null,
"max": 0.5,
"conditions": "Printed as 0~+-0.5 mA",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Ambient Operating Temperature",
"symbol": "TOPR",
"kind": "recommended_operating",
"unit": "°С",
"min": -20,
"typ": null,
"max": 60,
"conditions": "",
"source_page": 5,
"source": "datasheet"
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{
"name": "V+ Supply Current",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": 5.5,
"typ": null,
"max": 8,
"conditions": "VCC=6.5V, CD=0.8V",
"source_page": 5,
"source": "datasheet"
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{
"name": "V+ Supply Current",
"symbol": "ICC",
"kind": "electrical",
"unit": "µA",
"min": 600,
"typ": null,
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"conditions": "VCC=6.5V, CD=2V",
"source_page": 5,
"source": "datasheet"
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{
"name": "CD Input Resistance",
"symbol": "RCD",
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"min": 50,
"typ": null,
"max": 90,
"conditions": "VCC=VCD=6.5V",
"source_page": 5,
"source": "datasheet"
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{
"name": "CD High Input Voltage",
"symbol": "VCDH",
"kind": "electrical",
"unit": "V",
"min": 2,
"typ": null,
"max": null,
"conditions": "Printed as 2 VCC",
"source_page": 5,
"source": "datasheet"
},
{
"name": "CD Low Input Voltage",
"symbol": "VCDL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.8,
"conditions": "",
"source_page": 5,
"source": "datasheet"
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{
"name": "VB Output Voltage",
"symbol": "VB",
"kind": "electrical",
"unit": "V",
"min": 1.8,
"typ": 2.1,
"max": 2.4,
"conditions": "VCC=5V",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Gain RX Mode, RXI=150mVrms",
"symbol": "GRX",
"kind": "electrical",
"unit": "dB",
"min": 4,
"typ": 6,
"max": 8,
"conditions": "VCC=5V",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Gain Change",
"symbol": "GRX1",
"kind": "electrical",
"unit": "dB",
"min": -0.5,
"typ": 0,
"max": 0.5,
"conditions": "VCC=3.5V vs. VCC=5V",
"source_page": 5,
"source": "datasheet"
},
{
"name": "AGC Gain Change",
"symbol": "GRX2",
"kind": "electrical",
"unit": "dB",
"min": -25,
"typ": null,
"max": -15,
"conditions": "VCC=3.5V vs. VCC=5V",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Idle Mode Gain, RXI=150mVrms",
"symbol": "GRXI",
"kind": "electrical",
"unit": "dB",
"min": -22,
"typ": -20,
"max": -17,
"conditions": "Idle Mode, RXI=150mVrms",
"source_page": 5,
"source": "datasheet"
},
{
"name": "RX to TX Mode Range",
"symbol": "GRX3",
"kind": "electrical",
"unit": "dB",
"min": 49,
"typ": 52,
"max": 54,
"conditions": "(f=1kHz, VLC=VB)",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Volume Control Range",
"symbol": "VCR",
"kind": "electrical",
"unit": "dB",
"min": 27,
"typ": null,
"max": 35,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "RXO Low Voltage",
"symbol": "VRXOL",
"kind": "electrical",
"unit": "V",
"min": -1.5,
"typ": null,
"max": -1,
"conditions": "IOUT=+1mA, RXI=VB-1V, output measured with respect to VB",
"source_page": 5,
"source": "datasheet"
},
{
"name": "RXI Input Resistance",
"symbol": "RRXI",
"kind": "electrical",
"unit": "kΩ",
"min": 7,
"typ": 10,
"max": 14,
"conditions": "RXI<350mVrs",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Transmit Attenuator Gain",
"symbol": "GTX",
"kind": "electrical",
"unit": "dB",
"min": 4,
"typ": 6,
"max": 8,
"conditions": "TX Mode, TXI=150mVrms (f=1kHz)",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Idle Mode Gain, TXI=150mVrms",
"symbol": "GTXI",
"kind": "electrical",
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"min": -22,
"typ": -20,
"max": -17,
"conditions": "Idle Mode, TXI=150mVrms",
"source_page": 6,
"source": "datasheet"
},
{
"name": "TX to RX Mode Range",
"symbol": "GTXI",
"kind": "electrical",
"unit": "dB",
"min": 49,
"typ": 52,
"max": 54,
"conditions": "",
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"source": "datasheet"
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{
"name": "TXI Input Resistance",
"symbol": "RTXI",
"kind": "electrical",
"unit": "kΩ",
"min": 7,
"typ": 10,
"max": 14,
"conditions": "TXI<350mVrs",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Gain Tracking",
"symbol": "GTR",
"kind": "electrical",
"unit": "dB",
"min": -0.1,
"typ": null,
"max": 0.1,
"conditions": "GRX+GTX, @TX, IDIE, RX",
"source_page": 6,
"source": "datasheet"
},
{
"name": "CT Source Current (Switching to RX Mode)",
"symbol": "ICTR",
"kind": "electrical",
"unit": "µA",
"min": -85,
"typ": -60,
"max": -40,
"conditions": "Switching to RX Mode",
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"source": "datasheet"
},
{
"name": "CT Sink Current (Switching to TX Mode)",
"symbol": "ICTT",
"kind": "electrical",
"unit": "µA",
"min": 40,
"typ": 60,
"max": 85,
"conditions": "Switching to TX Mode",
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