component
XC121S101
Public Made by Adomby adom
Si Change Analog To Digital Converters (ADC), SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownXC121S101
Si Change · Analog To Digital Converters (ADC) · SOT-23-6
XC121S101 from Si Change, in a SOT-23-6. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VA | power_in | Positive analog supply input (4 V to 5.25 V single supply), which also serves as the ADC reference voltage; the VA supply should be set greater than or equal to the maximum VIN input signal to avoid saturating the maximum conversion code. |
| 2 | GND | power_in | Analog input signal ground; all analog and digital signals are referenced to this pin. |
| 3 | VIN | power_in | Analog signal input, single-ended unipolar, with a signal range of 0 V to VA. |
| 4 | SCLK | input | Serial clock input that directly controls the conversion and readout process; the 16th falling edge ends the conversion cycle. |
| 5 | SDATA | output | Serial data output; data is output MSB first after three leading zeros, and the pin goes tri-state after the 16th falling SCLK edge. |
| 6 | CS | input | Active-low chip select; a falling edge on CS wakes the device and starts a conversion, and CS must be held high for at least 1 µs after SDATA enters tri-state before the next conversion. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Si Change |
| Package | SOT-23-6 |
| Category | Data Acquisition |
| Pins | 6 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage (VA), single supply | VA | 4 | 5.25 | V | 1 | ||
| Integral nonlinearity (INL) | INL | -1.25 | 1.25 | LSB | 2 | ||
| Differential nonlinearity (DNL) | DNL | -1 | 1 | LSB | 2 | ||
| Operating temperature range | -40 | 85 | °C | 1 |
CAD (KiCad official)
- Symbol:
XC121S101 - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
xc121s101-etched.step/xc121s101-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);xc121s101.step/xc121s101.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Si Change datasheet (4 pp, sha256
dcc7880856c2f232, retrieved 2026-10-14, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).