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BL24CM2A-PARC
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BL Shanghai Belling EEPROM, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+43@@ -0,0 +1,43 @@+# BL24CM2A-PARC++**BL Shanghai Belling** · EEPROM · SOP-8++BL24CM2A-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. May be left floating or tied to GND. |+| 2 | NC | unconnected | No internal connection. May be left floating or tied to GND. |+| 3 | A2 | input | Device address input (hard-wired). Selects between up to two BL24CM2A devices on the same I2C bus (combined with an internal word-address bit). Internally biased to logic low if left floating; VIL <= VCC*0.3, VIH >= VCC*0.7. |+| 4 | GND | power_in | Ground / VSS reference (0 V). |+| 5 | SDA | bidirectional | I2C serial data. Open-drain, bidirectional; requires an external pull-up resistor to VCC and may be wire-ORed with other open-drain/open-collector devices. Schmitt-trigger filtered input; C_IO ~= 8 pF. |+| 6 | SCL | input | I2C serial clock input. Positive edge clocks data into the EEPROM; negative edge clocks data out. Schmitt-trigger input, up to 1 MHz; C_IN ~= 6 pF. |+| 7 | WP | input | Write Protect. When tied to GND, normal read/write to the full 2 Mbit array is enabled. When tied to VCC, the entire memory array is write-protected (read-only). Schmitt-trigger input. |+| 8 | VCC | power_in | Positive supply, +2.8 V to +5.5 V (absolute max +6.5 V). Typical read current 0.26 mA @ 400 kHz, write current 0.56 mA, standby 0.03 uA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | BL Shanghai Belling |+| Package | SOP-8 |+| Category | Memory |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `BL24CM2A-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/bl24cm2a-parc-datasheet.pdf) (18 pp, sha256 `10e7c02a073a7e76`, 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/bl24cm2a-parc-datasheet.pdf)
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