SLM1302

@@ -0,0 +1,43 @@+# SLM1302++**SOLA IC** · Real-time Clocks (RTC) · SOIC-8++SLM1302 from SOLA IC, in a SOIC-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 | VCC2 | power_in | Primary/main power supply input (typically the backup or trickle-charged supply). Operating range 2.0 V to 5.5 V. Connects through the internal power-control block along with VCC1. |+| 2 | X1 | input | 32.768 kHz crystal input. Connect one terminal of an external 32.768 kHz crystal here; drives the internal oscillator and divider that clocks the real-time counter. |+| 3 | X2 | output | 32.768 kHz crystal output. Connect the other terminal of the external 32.768 kHz crystal here to complete the oscillator loop. |+| 4 | GND | power_in | Device ground reference. All voltages are referenced to this pin (-0.5 V to 7.0 V absolute-max on any other pin relative to GND). |+| 5 | RST | input | Active-low reset / chip enable (shown with overline in the datasheet). Driving RST high initiates a data transfer and enables the shift register for address/command; driving it low terminates the transfer and places I/O in high-impedance. At power-up RST must be held low until VCC > 2.0 V. |+| 6 | I/O | bidirectional | Serial data line. Bidirectional command/address/data pin used with SCLK to shift bytes in (write) or out (read). Goes to high-impedance when RST is low. Logic-1 output guaranteed 1.6 V @ VCC=2 V, 2.4 V @ VCC=5 V; leakage up to 500 uA. |+| 7 | SCLK | input | Serial clock input from the host MCU. Data on I/O is sampled on the rising edge and shifted out on the falling edge. Max clock frequency 0.5 MHz @ VCC=2 V, 2 MHz @ VCC=5 V. |+| 8 | VCC1 | power_in | Secondary power supply input (typically the trickle-charged/backup battery rail; can be swapped with VCC2 depending on system design). Operating range 2.0 V to 5.5 V. Internal power-control block selects the higher of VCC1/VCC2. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | SOLA IC |+| Package | SOIC-8 |+| Category | RTC |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `SLM1302`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [SOLA IC datasheet](docs/slm1302-datasheet.pdf) (12 pp, sha256 `5a4d6145cbd1de79`, 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/slm1302-datasheet.pdf)

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