eV1527

@@ -0,0 +1,43 @@+# eV1527++**Vollgo** · Signal Switches / Encoders & Decoders / Multiplexers · SOP-8++eV1527 from Vollgo, in a SOP-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 | OSC | passive | Oscillator resistor input. Connect an external resistor (recommended 330 kΩ) from this pin to VCC to set the internal oscillator frequency (typ. Fop = 80 kHz). Timing/delay varies with Rosc per the datasheet resistor table. |+| 2 | VCC | power_in | Positive supply rail. Operating range 3.0 V to 13 V (absolute max 14 V). Operating current ~0.5 mA typ; static current <1.0 µA (OSC stopped, output unloaded). |+| 3 | GND | power_in | Ground / negative supply reference (0 V) for the device. |+| 4 | TXD | output | Serial encoded data output. Transmits the sync bit, the 20-bit pre-burned ID code (C0-C19) and the 4 data bits (D0-D3) mapped from K0-K3. Source current Ioh ≥ 5 mA and sink current Iol ≥ 3 mA at VCC=12 V, VO=6 V. |+| 5 | K0 | input | Key/trigger input 0 with internal pull-down resistor. Active-high; drive high (e.g. via a button to VCC) to transmit code with D0=1. Any K0-K3 asserted initiates a transmission frame on TXD. |+| 6 | K1 | input | Key/trigger input 1 with internal pull-down resistor. Active-high; drive high to transmit code with D1=1. K0-K3 may be combined for up to 15 unique key codes (see K0-K3 combination table). |+| 7 | K2 | input | Key/trigger input 2 with internal pull-down resistor. Active-high; drive high to transmit code with D2=1. Combine with K0/K1/K3 for multi-key codes. |+| 8 | K3 | input | Key/trigger input 3 with internal pull-down resistor. Active-high; drive high to transmit code with D3=1. Combine with K0/K1/K2 for multi-key codes. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Vollgo |+| Package | SOP-8 |+| Category | Logic |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `eV1527`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Vollgo datasheet](docs/ev1527-datasheet.pdf) (8 pp, sha256 `d461c195773d69f8`, 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/ev1527-datasheet.pdf)

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