# DAC121S101QCMK

**Texas Instruments** · Digital To Analog Converters (DAC) · TSOT-23-6

DAC121S101QCMK from Texas Instruments, in a TSOT-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 | VOUT | output | DAC analog output voltage, driven by an on-chip output amplifier that allows rail-to-rail output swing. |
| 2 | GND | power_in | Ground reference for all on-chip circuitry. |
| 3 | VA | power_in | Power supply and reference input for a single 2.7 V to 5.5 V supply, which also serves as the DAC voltage reference; should be decoupled to GND. |
| 4 | DIN | input | Serial data input; data is clocked into the 16-bit shift register on the falling edges of SCLK after SYNC falls. |
| 5 | SCLK | input | Serial clock input; data is clocked into the input shift register on the falling edges of this pin, with clock rates up to 30 MHz over the specified supply range. |
| 6 | SYNC | input | Active-low frame sync that enables the input shift register; the DAC updates on the 16th SCLK falling edge, and a rising edge before the 16th clock acts as an interrupt that causes the write to be ignored. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSOT-23-6 |
| Category | Data Acquisition |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `DAC121S101QCMK`
- Footprint: `Package_TO_SOT_SMD:TSOT-23-6`
- 3D model: TSOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `dac121s101qcmk-etched.step` / `dac121s101qcmk-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dac121s101qcmk.step` / `dac121s101qcmk.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/dac121s101) (39 pp, sha256 `efbe899ec5df26fe`, retrieved 2026-10-08, tier: lcsc)
- **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/dac121s101qcmk-datasheet.pdf)