BL24C04AE0-RRRC from BL Shanghai Belling, in a TSOT23-5L. 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	SCL	input	I2C serial clock input. Positive edge clocks data into the EEPROM; negative edge clocks data out. Schmitt-triggered, filtered. Max clock 400 kHz at VCC 1.7-2.5 V, 1 MHz at VCC 2.5-5.5 V. VIH >= 0.7 x VCC, VIL <= 0.3 x VCC. Typical input capacitance 6 pF.
2	GND	power_in	Device ground reference (0 V).
3	SDA	bidirectional	I2C bidirectional serial data. Open-drain output; requires an external pull-up to VCC and may be wire-OR'd with other open-drain devices. VOL <= 0.4 V at IOL = 3.0 mA (VCC = 5 V). Typical I/O capacitance 8 pF.
4	VCC	power_in	Positive supply voltage. Operating range 1.7 V to 5.5 V (400 kHz) or 2.5 V to 5.5 V (1 MHz). ICC ~0.14 mA read / 0.28 mA write at 400 kHz, standby ~0.03 uA. Absolute maximum 6.5 V.
5	WP	input	Hardware Write Protect input. Tie to GND for normal read/write operation; tie to VCC to write-protect the full array. Schmitt-triggered logic input. Do not leave floating.

Key specifications

Parameter	Value
Manufacturer	BL Shanghai Belling
Package	TSOT23-5L
Category	Memory
Pins	5

Ordering variants

BL24C04AE0-RRRC
BL24C04AE0-RRRCRRRS
BL24C04AE0-RRRCTCRC
BL24C04AE0-RRRCTCRS
BL24C04AE0-RRRCPARC
BL24C04AE0-RRRCPARS
BL24C04AE0-RRRCSFRC
BL24C04AE0-RRRCSFRS
BL24C04AE0-RRRCDARC
BL24C04AE0-RRRCDARS
BL24C04AE0-RRRCNTRC
BL24C04AE0-RRRCNTRS

CAD (KiCad official)

Symbol: BL24C04AE0-RRRC
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: TSOT23-5L (KiCad packages3D, STEP)

Provenance

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

Datasheet: BL Shanghai Belling datasheet (24 pp, sha256 07de7e3648177ef4, 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