component
CMT2157A-ESR
Public Made by Adomby adom
HopeRF Micro-electronics RF Transceiver ICs, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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Ray
Set visibility: public
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"manufacturer": "HopeRF Micro-electronics",
"package": "SOIC-14",
"pin_count": 14,
"category": "RF & Radio",
"subcategory": "RF Transceiver ICs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/1d8ac091fba847f68295c40468329e54.pdf",
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"source": "Component Ocean /api/assign-pns",
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"mouser": {
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"description": "LED driver output, active low, which lights or flashes to indicate transmission and low battery detection, with drive current limited by the LED driving capability."
},
{
"number": "2",
"name": "VDD",
"type": "power_in",
"description": "Power supply input; the recommended operating supply range is 1.8 to 3.6 V."
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{
"number": "3",
"name": "GND",
"type": "power_in",
"description": "Ground reference for the device."
},
{
"number": "4",
"name": "RFO",
"type": "output",
"description": "Power amplifier output, with output power specified from -10 to +13 dBm."
},
{
"number": "5",
"name": "K7",
"type": "input",
"description": "Push button 7 input for the encoder; the device supports up to 7 configurable push-button data pins."
},
{
"number": "6",
"name": "K6",
"type": "input",
"description": "Push button 6 input for the encoder; the device supports up to 7 configurable push-button data pins."
},
{
"number": "7",
"name": "K5",
"type": "input",
"description": "Push button 5 input for the encoder; the device supports up to 7 configurable push-button data pins."
},
{
"number": "8",
"name": "K4",
"type": "input",
"description": "Push button 4 input for the encoder; the device supports up to 7 configurable push-button data pins."
},
{
"number": "9",
"name": "K3",
"type": "input",
"description": "Push button 3 input for the encoder; the device supports up to 7 configurable push-button data pins."
},
{
"number": "10",
"name": "K2",
"type": "input",
"description": "Push button 2 input for the encoder; the device supports up to 7 configurable push-button data pins."
},
{
"number": "11",
"name": "K1",
"type": "input",
"description": "Push button 1 input for the encoder; the device supports up to 7 configurable push-button data pins."
},
{
"number": "12",
"name": "DATA",
"type": "bidirectional",
"description": "Data pin to access the embedded EEPROM, internally pulled up to VDD."
},
{
"number": "13",
"name": "CLK",
"type": "input",
"description": "Clock pin to access the embedded EEPROM, internally pulled up to VDD."
},
{
"number": "14",
"name": "XTAL",
"type": "input",
"description": "26 MHz single-ended crystal oscillator input or external 26 MHz reference clock input, which requires a coupling capacitor and 0.3 to 0.7 Vpp amplitude when driven externally."
}
],
"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",
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"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: Table 6 groups these pins as K[7:1] without listing each pin individually. The per-pin mapping (pin ; Pages 22-24 refer to pin 12 as K0, which does not appear in the Table 6 pin list. Table 6 defines pi; Pin type for LED (output) and RFO (output) is assigned from the I/O column of Table 6 (O). The LED d"
],
"pages_sent": 14,
"cost_usd": 0.0582,
"at": "2026-11-05T15:06:03"
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"pages": 31,
"sha256": "687441d9010dcd89",
"source_tier": "lcsc"
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"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 14,
"described": 14,
"cites_pages": true,
"refuses_to_fabricate": true
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"package_dims": {
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"source_page": 27,
"D": {
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"A": {
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"metadata": {
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"Package": "SOIC-14",
"Category": "RF & Radio",
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"source_page": 5,
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{
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"min": -40,
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{
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{
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{
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{
"name": "ESD Rating Human Body Model (HBM)",
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"min": -2,
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{
"name": "Latch-up Current",
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{
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{
"name": "(G)FSK Modulation Deviation Range",
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{
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{
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{
"name": "PA Ramping Time",
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{
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"source_page": 1,
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{
"name": "Crystal Frequency",
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"min": 26,
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{
"name": "Crystal Tolerance",
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},
{
"name": "Load Capacitance",
"symbol": "CLOAD",
"kind": "electrical",
"unit": "pF",
"min": 12,
"typ": null,
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"conditions": "",
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"source": "datasheet"
}
]
}
},
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}