XC11661

Si Change · Analog To Digital Converters (ADC) · SOT-23-6

XC11661 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	VDD	power_in	Power supply input for 3.3 V to 5.25 V single-supply operation, which also serves as the ADC reference voltage.
2	GND	power_in	Analog input signal ground; all analog and digital signals are referenced to this pin.
3	AIN	input	Unipolar single-ended analog signal input with an input range of 0 V to VDD.
4	SCLK	input	Serial clock input that clocks out the conversion data and is the source of the conversion clock.
5	DOUT	output	Serial conversion result output, MSB first, which goes high-impedance when the conversion cycle ends.
6	CS	input	Active-low chip select that gates SCLK, starts a conversion, and frames the output data; pulling CS high before 10 SCLK cycles aborts the 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
Single supply voltage operating range		3.3		5.25	V	Single supply, as stated in features	1
Operating temperature range		-40		85	℃		1
Integral nonlinearity (INL)	INL	-0.5		0.5	LSB		1
Differential nonlinearity (DNL)	DNL	-0.5		0.5	LSB		1
Maximum sampling rate				500	KSPS		1
Ultra-low power consumption (typical)			1.4		mW	3.3 V, 500 KSPS	1
Ultra-low power consumption (typical)			2.2		mW	4.0 V, 500 KSPS	1

CAD (KiCad official)

Symbol: XC11661
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)
3D model files: xc11661-etched.step / xc11661-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); xc11661.step / xc11661.glb are the bare package body.

Provenance

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

Datasheet: Si Change datasheet (4 pp, sha256 be19859ee3248a52, retrieved 2026-10-17, 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

# XC11661

**Si Change** · Analog To Digital Converters (ADC) · SOT-23-6

XC11661 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 | VDD | power_in | Power supply input for 3.3 V to 5.25 V single-supply operation, which also serves as the ADC reference voltage. |
| 2 | GND | power_in | Analog input signal ground; all analog and digital signals are referenced to this pin. |
| 3 | AIN | input | Unipolar single-ended analog signal input with an input range of 0 V to VDD. |
| 4 | SCLK | input | Serial clock input that clocks out the conversion data and is the source of the conversion clock. |
| 5 | DOUT | output | Serial conversion result output, MSB first, which goes high-impedance when the conversion cycle ends. |
| 6 | CS | input | Active-low chip select that gates SCLK, starts a conversion, and frames the output data; pulling CS high before 10 SCLK cycles aborts the 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 |
|---|---|---|---|---|---|---|---|
| Single supply voltage operating range |  | 3.3 |  | 5.25 | V | Single supply, as stated in features | 1 |
| Operating temperature range |  | -40 |  | 85 | ℃ |  | 1 |
| Integral nonlinearity (INL) | INL | -0.5 |  | 0.5 | LSB |  | 1 |
| Differential nonlinearity (DNL) | DNL | -0.5 |  | 0.5 | LSB |  | 1 |
| Maximum sampling rate |  |  |  | 500 | KSPS |  | 1 |
| Ultra-low power consumption (typical) |  |  | 1.4 |  | mW | 3.3 V, 500 KSPS | 1 |
| Ultra-low power consumption (typical) |  |  | 2.2 |  | mW | 4.0 V, 500 KSPS | 1 |

## CAD (KiCad official)

- Symbol: `XC11661`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `xc11661-etched.step` / `xc11661-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xc11661.step` / `xc11661.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Si Change datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603387366200012800) (4 pp, sha256 `be19859ee3248a52`, retrieved 2026-10-17, 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/xc11661-datasheet.pdf)