component
DS125BR111RTWR
Public Made by Adomby adom
Texas Instruments Signal Buffers, Repeaters, Splitters, WQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"type": "component",
"slug": "ds125br111rtwr",
"title": "DS125BR111RTWR",
"brief": "Texas Instruments Signal Buffers, Repeaters, Splitters, WQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
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"component": {
"mpn": "DS125BR111RTWR",
"manufacturer": "Texas Instruments",
"package": "WQFN-24-EP(4x4)",
"pin_count": 25,
"category": "Interface",
"subcategory": "Signal Buffers, Repeaters, Splitters",
"datasheet": "https://www.ti.com/cn/lit/gpn/ds125br111",
"parts": {
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"lbr": "ds125br111rtwr.lbr"
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"distributor_links": {
"lcsc": "C2675195",
"digikey": "296-40090-2-ND",
"mouser": "595-DS125BR111RTWR"
},
"distributor_check": {
"checked_at": "2026-10-06T04:24:14Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "296-40090-2-ND",
"status": "found",
"lifecycle": "Active"
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"pn": "595-DS125BR111RTWR",
"status": "found"
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},
"pins": [
{
"number": "1",
"name": "AD3/EQB0",
"type": "input",
"description": "SMBus slave address input AD3 in SMBus mode, or EQB0 equalization level control for the B direction in Pin Mode (4-level LVCMOS)."
},
{
"number": "2",
"name": "AD2/EQB1",
"type": "input",
"description": "SMBus slave address input AD2 in SMBus mode; as EQB1 in Pin Mode it is not used and must always be tied to GND."
},
{
"number": "3",
"name": "ENSMB",
"type": "input",
"description": "4-level SMBus enable: 1 kΩ to VDD = SMBus slave mode, float = read external EEPROM (master mode), 1 kΩ to GND = Pin Mode."
},
{
"number": "4",
"name": "SDA/VODA_DB",
"type": "bidirectional",
"description": "SMBus bidirectional data pin (open drain output, needs external 2 kΩ to 5 kΩ pull-up, 3.3 V tolerant) in SMBus modes, or VODA_DB CHA output amplitude dynamic range control in Pin Mode (hold Low for SAS and PCIe)."
},
{
"number": "5",
"name": "SCL/VODB_DB",
"type": "bidirectional",
"description": "SMBus clock input in slave mode and clock output (open drain) when loading EEPROM in master mode, or VODB_DB CHB output amplitude control in Pin Mode (hold Low for SAS and PCIe)."
},
{
"number": "6",
"name": "PWDN",
"type": "input",
"description": "Power-down control: tie High = low power power-down, tie GND = normal operation."
},
{
"number": "7",
"name": "OUTA+",
"type": "output",
"description": "Non-inverting 50 Ω driver output of channel A, compatible with AC coupled CML inputs; AC coupling required."
},
{
"number": "8",
"name": "OUTA-",
"type": "output",
"description": "Inverting 50 Ω driver output of channel A, compatible with AC coupled CML inputs; AC coupling required."
},
{
"number": "9",
"name": "AD1/EQA1",
"type": "input",
"description": "SMBus slave address input AD1 in SMBus mode; as EQA1 in Pin Mode it is not used and must always be tied to GND."
},
{
"number": "10",
"name": "AD0/EQA0",
"type": "input",
"description": "SMBus slave address input AD0 in SMBus mode, or EQA0 equalization level control for the A direction in Pin Mode (4-level LVCMOS)."
},
{
"number": "11",
"name": "INB+",
"type": "input",
"description": "Non-inverting CML differential input to the equalizer of channel B with on-chip 50 Ω termination to VDD enabled by RXDET control logic; AC coupling required."
},
{
"number": "12",
"name": "INB-",
"type": "input",
"description": "Inverting CML differential input to the equalizer of channel B with on-chip 50 Ω termination to VDD enabled by RXDET control logic; AC coupling required."
},
{
"number": "13",
"name": "RES",
"type": "input",
"description": "Reserved pin; this input must be left floating."
},
{
"number": "14",
"name": "SD_TH",
"type": "input",
"description": "4-level input controlling the internal signal detect threshold, for system debug only and not controlling the high speed datapath."
},
{
"number": "15",
"name": "VIN",
"type": "power_in",
"description": "In 3.3 V mode feed 3.3 V to VIN to power the internal regulator; in 2.5 V mode leave floating."
},
{
"number": "16",
"name": "VDD_SEL",
"type": "input",
"description": "Controls the internal regulator: float = 2.5 V mode, tie GND = 3.3 V mode."
},
{
"number": "17",
"name": "READEN/VOD_SEL",
"type": "input",
"description": "READEN: logic low starts external EEPROM load (ENSMB float) and must be tied low for AD[3:0] to be active in SMBus slave mode; VOD_SEL controls the low-frequency ratio of input to output voltage amplitude in Pin Mode."
},
{
"number": "18",
"name": "DONE/RXDET",
"type": "bidirectional",
"description": "DONE output: HIGH = external EEPROM load failed or incomplete, LOW = passed; RXDET input in Pin Mode selects 50 Ω or >50 kΩ input termination (set to logic 1 for SAS/SATA to keep termination enabled)."
},
{
"number": "19",
"name": "OUTB-",
"type": "output",
"description": "Inverting 50 Ω driver output of channel B, compatible with AC coupled CML inputs; AC coupling required."
},
{
"number": "20",
"name": "OUTB+",
"type": "output",
"description": "Non-inverting 50 Ω driver output of channel B, compatible with AC coupled CML inputs; AC coupling required."
},
{
"number": "21",
"name": "VDD",
"type": "power_in",
"description": "CML/analog power supply pin: connect to 2.5 V in 2.5 V mode (2.375 V to 2.625 V), or decouple with a cap to GND in 3.3 V mode."
},
{
"number": "22",
"name": "VDD",
"type": "power_in",
"description": "CML/analog power supply pin: connect to 2.5 V in 2.5 V mode (2.375 V to 2.625 V), or decouple with a cap to GND in 3.3 V mode."
},
{
"number": "23",
"name": "INA-",
"type": "input",
"description": "Inverting CML differential input to the equalizer of channel A with on-chip 50 Ω termination to VDD enabled by RXDET control logic; AC coupling required."
},
{
"number": "24",
"name": "INA+",
"type": "input",
"description": "Non-inverting CML differential input to the equalizer of channel A with on-chip 50 Ω termination to VDD enabled by RXDET control logic; AC coupling required."
},
{
"number": "25",
"name": "GND",
"type": "power_in",
"description": "Die attach pad and the only device ground connection; connect to GND through multiple (minimum of 4) vias for electrical and thermal performance."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-haiku-4-5-20251001",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: Pins have dual functions that depend on operating mode (SMBus vs PIN vs EEPROM): ensure correct mode; Pin 18 (RXDET/DONE) changes from input to output depending on operating mode; classified as tri_stat",
"exposed pad 25 added from the footprint",
"dropped thermal pad ['EP'] absent from footprint"
],
"pages_sent": 11,
"cost_usd": 0.1785,
"at": "2026-10-06T04:23:58"
},
"datasheet": {
"url": "https://www.ti.com/cn/lit/gpn/ds125br111",
"pages": 45,
"sha256": "0b7cee4cabe65671",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 25,
"described": 25,
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}
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"metadata": {
"specs": {
"Manufacturer": "Texas Instruments",
"Package": "WQFN-24-EP(4x4)",
"Category": "Interface",
"Pins": "25"
}
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"email": "[email protected]"
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