HX24C256DRG from HANSCHIP semiconductor, 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. Hardwire to VCC or GND to set one of the device address bits; may be left floating (internal pull-down to GND when board VCC-plane capacitive coupling is <3 pF). Combined with A1 to select one of up to 4 devices on the same I2C bus.
2	A1	input	Device address input bit 1. Hardwire to VCC or GND to set the device I2C address; may be left floating (internal pull-down to GND under low coupling conditions).
3	NC	unconnected	No connect. Leave floating or tie to GND.
4	GND	power_in	Ground reference for the device.
5	SDA	bidirectional	Serial data line for the two-wire I2C interface. Open-drain output, requires an external pull-up resistor (typ. to VCC). Bi-directional; can be wire-ORed with other open-drain devices.
6	SCL	input	Serial clock input for the two-wire I2C interface. Data is clocked into the EEPROM on the positive edge and out on the negative edge. Supports 1 MHz @ 5V, 400 kHz @ 1.8/2.7/3.3V.
7	WP	input	Write Protect. Tie to GND for normal read/write operation; tie to VCC to inhibit all write operations (full 256K array protected). Internal pull-down to GND when board VCC-plane capacitive coupling is <3 pF; recommend tying to GND if coupling is >3 pF.
8	VCC	power_in	Power supply input. Wide operating range 1.8V to 5.5V. Absolute maximum +6.5V.

Key specifications

Parameter	Value
Manufacturer	HANSCHIP semiconductor
Package	SOP-8
Category	Memory
Pins	8

Ordering variants

Same part, different packaging or reel option.

HX24C256DRG
HX24C256DRG4
HX24C256DRGPG
HX24C256DRGDGKRG

CAD (KiCad official)

Symbol: HX24C256DRG
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: HANSCHIP semiconductor datasheet (14 pp, sha256 aa353337ce1b7552, 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