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-PARC

CAD (KiCad official)

Symbol: BL24C128A-PARC
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`bl24c128a-parc.step`	122 KB	You want the bare part, or you mark your own boards.
`bl24c128a-parc-etched.step`	2.6 MB	You want the part with `BL24C128A-PARC` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 644 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: BL Shanghai Belling datasheet (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