BL24C128A-PARC

@@ -0,0 +1,47 @@+# BL24C128A-PARC++**BL Shanghai Belling** · EEPROM · SOP-8++BL24C128A-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 | A0 | input | Hardwired device address input bit 0. Compared against A0 in the I2C device address byte to allow up to 8 chips on one bus. Internally biased to logic low if left floating. |+| 2 | A1 | input | Hardwired device address input bit 1. Compared against A1 in the I2C device address byte. Internally biased to logic low if left floating. |+| 3 | A2 | input | Hardwired device address input bit 2. Compared against A2 in the I2C device address byte. Internally biased to logic low if left floating. |+| 4 | GND | power_in | Ground reference for the device. |+| 5 | SDA | bidirectional | I2C serial data line. Open-drain, bidirectional; requires an external pull-up resistor. May be wire-ORed with other open-drain/open-collector devices on the bus. |+| 6 | SCL | input | I2C serial clock input. Positive edge clocks data into the EEPROM; negative edge clocks data out. Schmitt-triggered, filtered input; supports 100 kHz, 400 kHz, and 1 MHz operation. |+| 7 | WP | input | Write Protect. Tie to GND for normal read/write operation. Tie to VCC to hardware write-protect the full 128 Kbit array. |+| 8 | VCC | power_in | Positive supply, 1.7 V to 5.5 V. Decouple to GND with a ceramic capacitor placed close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | BL Shanghai Belling |+| Package | SOP-8 |+| Category | Memory |+| Pins | 8 |++## Ordering variants++- `BL24C128A-PARCPARC`++## CAD (KiCad official)++- Symbol: `BL24C128A-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/bl24c128a-parc-datasheet.pdf) (18 pp, sha256 `46781fd0224cef21`, 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/bl24c128a-parc-datasheet.pdf)

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