# SL121S021

**Slkor SLKORMICRO Elec** · Analog To Digital Converters (ADC) · SOT-23-6

SL121S021 from Slkor SLKORMICRO Elec, 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 | Power supply input for the 3.3 V to 5.25 V single supply, which also serves as the ADC reference voltage; VA must be set greater than or equal to the maximum VIN 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 with a range of 0 V to VA. |
| 4 | SCLK | input | Serial clock input that directly controls the conversion and readout process. |
| 5 | SDATA | output | Serial data output; it enters tri-state after the 16th falling edge of SCLK, which ends the conversion cycle. |
| 6 | CS | input | Active-low chip select; a falling edge starts a conversion cycle and the device wakes from auto power-down, and pulling CS high before 10 SCLK cycles aborts the conversion. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Slkor SLKORMICRO Elec |
| 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 | 3.3 |  | 5.25 | V | single supply | 1 |
| Operating temperature range |  | -40 |  | 85 | °C |  | 1 |
| Sampling rate |  | 50 |  | 200 | KSPS |  | 1 |
| Integral nonlinearity error | INL | -1 |  | 1 | LSB |  | 1 |
| Differential nonlinearity error | DNL | -1 |  | 1 | LSB |  | 1 |
| Analog input signal range | VIN | 0 |  |  | V | signal range 0 V to VA (upper limit printed as VA, not a number) | 2 |

## CAD (KiCad official)

- Symbol: `SL121S021`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `sl121s021-etched.step` / `sl121s021-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sl121s021.step` / `sl121s021.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Slkor SLKORMICRO Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604447502154551296) (4 pp, sha256 `c2d8c07bf9af64d9`, retrieved 2026-10-18, 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`, primary `claude-haiku-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/sl121s021-datasheet.pdf)