component
CH444G
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WCH Jiangsu Qin Heng Analog Switches, Multiplexers, SOP-16. 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
markdownCH444G
WCH Jiangsu Qin Heng · Analog Switches, Multiplexers · SOP-16
CH444G from WCH Jiangsu Qin Heng, in a SOP-16. 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 | EN# | input | Global enable input, active low: when EN# is high, all analog switches are disconnected regardless of IN1/IN0. |
| 2 | IN1 | input | Select input (high bit) for the 4:1 analog switches; with IN1&IN0 at 00, 01, 10 or 11 the 1#, 2#, 3# or 4# ports are selected. |
| 3 | S4A | passive | Port 4 of the 4:1 analog switch A, selected when IN1&IN0 = 11; the recommended analog signal range is 0 to 2.8 V at VCC = 5 V. |
| 4 | S3A | passive | Port 3 of the 4:1 analog switch A, selected when IN1&IN0 = 10. |
| 5 | S2A | passive | Port 2 of the 4:1 analog switch A, selected when IN1&IN0 = 01. |
| 6 | S1A | passive | Port 1 of the 4:1 analog switch A, selected when IN1&IN0 = 00. |
| 7 | YA | passive | Common terminal of the 4:1 analog switch A, connected to one of S1A-S4A as selected by IN1/IN0 when EN# is low. |
| 8 | GND | power_in | Common ground and reference for the digital signals; the datasheet requires a good ground connection to limit interference. |
| 9 | YB | passive | Common terminal of the 4:1 analog switch B, connected to one of S1B-S4B as selected by IN1/IN0 when EN# is low. |
| 10 | S1B | passive | Port 1 of the 4:1 analog switch B, selected when IN1&IN0 = 00. |
| 11 | S2B | passive | Port 2 of the 4:1 analog switch B, selected when IN1&IN0 = 01. |
| 12 | S3B | passive | Port 3 of the 4:1 analog switch B, selected when IN1&IN0 = 10. |
| 13 | S4B | passive | Port 4 of the 4:1 analog switch B, selected when IN1&IN0 = 11; the recommended analog signal range is 0 to 2.8 V at VCC = 5 V. |
| 14 | IN0 | input | Select input (low bit) for the 4:1 analog switches, used together with IN1 to choose ports 1# to 4#. |
| 15 | NC | unconnected | Reserved pin; the datasheet states it must not be connected. |
| 16 | VCC | power_in | Positive power supply; the 5 V part is rated for 4.0 V to 5.5 V operation with an absolute maximum of 6.5 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WCH Jiangsu Qin Heng |
| Package | SOP-16 |
| Category | Interface |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
CH444G - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOP-16 (KiCad packages3D, STEP)
- 3D model files:
ch444g-etched.step/ch444g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ch444g.step/ch444g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WCH Jiangsu Qin Heng datasheet (16 pp, sha256
19c56b918901f689, retrieved 2026-10-09, 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).