BL24CM1A-PARC

@@ -0,0 +1,47 @@+# BL24CM1A-PARC++**BL Shanghai Belling** · EEPROM · SOP-8++BL24CM1A-PARC from BL Shanghai Belling, 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 | NC | unconnected | No internal connection. Leave floating or tie to GND for best noise immunity. |+| 2 | A1 | input | Device address input bit 1. Hard-wired to VCC or GND to select one of up to four BL24CM1A devices on the same I2C bus. Internally biased to logic low if left floating (proprietary internal bias). |+| 3 | A2 | input | Device address input bit 2. Hard-wired to VCC or GND to select one of up to four BL24CM1A devices on the same I2C bus. Internally biased to logic low if left floating. |+| 4 | GND | power_in | Ground reference for supply and all logic signals. |+| 5 | SDA | bidirectional | I2C serial data. Bidirectional, open-drain; requires an external pull-up resistor to VCC. May be wire-ORed with other open-drain/open-collector devices on the same bus. |+| 6 | SCL | input | I2C serial clock input, up to 400 kHz at VCC >= 2.0 V. Positive edge clocks data into the EEPROM; negative edge clocks data out. Schmitt-trigger, filtered input. |+| 7 | WP | input | Hardware write-protect input. Tie to GND for normal read/write operation; tie to VCC to write-protect the full 1024K array (see Table 2). Schmitt-trigger, filtered input. |+| 8 | VCC | power_in | Positive supply, single-supply operation down to 2.0 V (up to 400 kHz at 2.0 V). Decouple to GND with a 100 nF ceramic capacitor placed close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | BL Shanghai Belling |+| Package | SOP-8 |+| Category | Memory |+| Pins | 8 |++## Ordering variants++- `BL24CM1A-PARCPARC`++## CAD (KiCad official)++- Symbol: `BL24CM1A-PARC`+- 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:** [BL Shanghai Belling datasheet](docs/bl24cm1a-parc-datasheet.pdf) (20 pp, sha256 `90c054d62d989bfb`, 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/bl24cm1a-parc-datasheet.pdf)

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