ET6226M

@@ -0,0 +1,51 @@+# ET6226M++**UMW** · LED Display Drivers · SOP-16++ET6226M from UMW, in a SOP-16. 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 | GR1 | output | Grid 1 (bit) LED low-side drive output; also used as keyboard scanning output for column/grid 1. Bit drive current is at least 150 mA. |+| 2 | CLK | input | Serial clock input for the two-wire bus interface. Internal pull-up resistor. Data on DAT is sampled while CLK is high; DAT transitions occur while CLK is low. |+| 3 | DAT | bidirectional | Serial data input/output for the two-wire bus interface. Open-drain style output (built-in drain-mode pull-on). Carries command, display data, and returned key codes. |+| 4 | GND | power_in | Ground reference pin (0 V) for the device. |+| 5 | GR2 | output | Grid 2 (bit) LED low-side drive output; also used as keyboard scanning output. Bit drive current is at least 150 mA. |+| 6 | GR3 | output | Grid 3 (bit) LED low-side drive output; also used as keyboard scanning output. Bit drive current is at least 150 mA. |+| 7 | GR4 | output | Grid 4 (bit) LED low-side drive output; also used as keyboard scanning output. Bit drive current is at least 150 mA. |+| 8 | SG1/KS1 | bidirectional | Segment 1 LED high-side drive output (>=25 mA); also used as key-scan input row 1 during keyboard scanning, active-high with internal pull-down. |+| 9 | SG2/KS2 | bidirectional | Segment 2 LED high-side drive output (>=25 mA); also used as key-scan input row 2, active-high with internal pull-down. |+| 10 | VCC | power_in | Positive supply pin. Operating range 3.0 V to 5.5 V. Absolute maximum -0.5 V to 6.5 V; max supply current ICC = 150 mA. |+| 11 | SG3/KS3 | bidirectional | Segment 3 LED high-side drive output (>=25 mA); also used as key-scan input row 3, active-high with internal pull-down. |+| 12 | SG4/KS4 | bidirectional | Segment 4 LED high-side drive output (>=25 mA); also used as key-scan input row 4, active-high with internal pull-down. |+| 13 | SG5/KS5 | bidirectional | Segment 5 LED high-side drive output (>=25 mA); also used as key-scan input row 5, active-high with internal pull-down. |+| 14 | SG6/KS6 | bidirectional | Segment 6 LED high-side drive output (>=25 mA); also used as key-scan input row 6, active-high with internal pull-down. |+| 15 | SG7/KS7 | bidirectional | Segment 7 LED high-side drive output (>=25 mA); also used as key-scan input row 7, active-high with internal pull-down. |+| 16 | DP/KP | output | Segment/Bit output - LED segment drive output (typically the decimal point in 7-segment mode) or the 8th segment in 8-segment mode; also serves as keyboard-symbol output. Function depends on the 7-segment vs 8-segment mode selection register bit. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | SOP-16 |+| Category | LED-drv |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `ET6226M`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOP-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [UMW datasheet](docs/et6226m-datasheet.pdf) (14 pp, sha256 `bc228d99341777a6`, 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/et6226m-datasheet.pdf)

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