BL24C256A-PARC

@@ -0,0 +1,62 @@+# BL24C256A-PARC++**BL Shanghai Belling** · EEPROM · SOP-8++BL24C256A-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 | Device address input bit 0. Hardwired to VCC or GND to select one of eight device addresses on the I2C bus. Internal proprietary bias pulls the pin to a logic low if left floating. |+| 2 | A1 | input | Device address input bit 1. Hardwired to VCC or GND to select one of eight device addresses on the I2C bus. Internal proprietary bias pulls the pin to a logic low if left floating. |+| 3 | A2 | input | Device address input bit 2. Hardwired to VCC or GND to select one of eight device addresses on the I2C bus. Internal proprietary bias pulls the pin to a logic low if left floating. |+| 4 | GND | power_in | Ground reference for the device. |+| 5 | SDA | bidirectional | I2C serial data line. Open-drain bidirectional pin for serial data transfer; requires an external pull-up resistor to VCC. May be wire-ORed with other open-drain devices on the bus. |+| 6 | SCL | input | I2C serial clock input. Data is clocked into the EEPROM on the positive edge and clocked out on the negative edge. Supports up to 1 MHz at VCC >= 2.5 V (400 kHz at 1.7-2.5 V). |+| 7 | WP | input | Write Protect. Tie to GND for normal read/write operation. When tied to VCC, the entire 256 Kbit memory array becomes write-protected (hardware data protection). |+| 8 | VCC | power_in | Positive supply voltage, 1.7 V to 5.5 V (2.5 V to 5.5 V for full 1 MHz operation). Typical read current 0.14 mA, write current 0.28 mA at VCC=5.0 V/400 kHz. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | BL Shanghai Belling |+| Package | SOP-8 |+| Category | Memory |+| Pins | 8 |++## Ordering variants++- `BL24C256A-PARCPARC`+- `BL24C256A-PARCPARS`+- `BL24C256A-PARCPATC`+- `BL24C256A-PARCPATS`+- `BL24C256A-PARCDARS`+- `BL24C256A-PARCDATS`+- `BL24C256A-PARCDARC`+- `BL24C256A-PARCDATC`+- `BL24C256A-PARCSFRS`+- `BL24C256A-PARCSFTS`+- `BL24C256A-PARCSFRC`+- `BL24C256A-PARCSFTC`+- `BL24C256A-PARCNTRS`+- `BL24C256A-PARCNTTS`+- `BL24C256A-PARCNTRC`+- `BL24C256A-PARCNTTC`++## CAD (KiCad official)++- Symbol: `BL24C256A-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/bl24c256a-parc-datasheet.pdf) (16 pp, sha256 `5909eda557ab1e85`, 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/bl24c256a-parc-datasheet.pdf)

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