UM3212M8

@@ -0,0 +1,49 @@+# UM3212M8++**Union Semiconductor** · Translators / Level Shifters · MSOP-8++UM3212M8 from Union Semiconductor, in a MSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | GND | power_in | Ground (0V) reference for the device. |+| 2 | VREF1 | power_in | Low-voltage side reference supply voltage for SCL1 and SDA1. Operating range 0V to 5V; typical 1.0V to 3.6V. |+| 3 | SCL1 | bidirectional | Serial clock, low-voltage side. Open-drain I2C bus I/O; connect to VREF1 through a pull-up resistor. |+| 4 | SDA1 | bidirectional | Serial data, low-voltage side. Open-drain I2C bus I/O; connect to VREF1 through a pull-up resistor. |+| 5 | SDA2 | bidirectional | Serial data, high-voltage side. Open-drain I2C bus I/O; connect to VREF2 through a pull-up resistor. |+| 6 | SCL2 | bidirectional | Serial clock, high-voltage side. Open-drain I2C bus I/O; connect to VREF2 through a pull-up resistor. |+| 7 | VREF2 | power_in | High-voltage side reference supply voltage for SCL2 and SDA2. Operating range 0V to 5V; typical 1.8V to 5.5V. |+| 8 | EN | input | Switch enable input. When HIGH the translator is on and the SCL1/SDA1 pins are connected to SCL2/SDA2; when LOW all channels are high-impedance. Connect to VREF2 and pull up through a high-value resistor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Union Semiconductor |+| Package | MSOP-8 |+| Category | Logic |+| Pins | 8 |++## Ordering variants++- `UM3212M8`+- `UM3212M8UM3212DA`+- `UM3212M8UM3212V8`++## CAD (KiCad official)++- Symbol: `UM3212M8`+- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`+- 3D model: MSOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Union Semiconductor datasheet](docs/um3212m8-datasheet.pdf) (13 pp, sha256 `2a269d25929ecc53`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/um3212m8-datasheet.pdf)

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