FT24C256A-ESR-T from FMD Fremont Micro Devices, 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/chip select address input bit 0. Hardwire to VIH or VIL to set the slave address; internally recognized as VIL if left unconnected.
2	A1	input	Device/chip select address input bit 1. Hardwire to VIH or VIL to set the slave address; internally recognized as VIL if left unconnected.
3	A2	input	Device/chip select address input bit 2. Hardwire to VIH or VIL to set the slave address; internally recognized as VIL if left unconnected.
4	GND	power_in	Ground reference for the device.
5	SDA	bidirectional	Serial data line. Bi-directional open-drain output; must be pulled to VCC with an external resistor. Can be wired-OR with other open-drain devices on the I2C bus.
6	SCL	input	Serial clock input. Rising edge latches data into the EEPROM, falling edge clocks data out. Supports 400 kHz at 1.8V and up to 1 MHz at 2.5-5.0V.
7	WP	input	Write protect input. When tied to VIH or VCC, all programming (write) operations are disabled; when left unconnected or tied to VIL, writes are enabled. Read operations are unaffected by WP.
8	VCC	power_in	Supply voltage input. Operating range 1.8V to 5.5V. Standby current < 1 µA.

Key specifications

Parameter	Value
Manufacturer	FMD Fremont Micro Devices
Package	SOP-8
Category	Memory
Pins	8

Ordering variants

Same part, different packaging or reel option.

FT24C256A-ESR-T
FT24C256A-ESR-TP
FT24C256A-ESR-TEM
FT24C256A-ESR-TET
FT24C256A-ESR-TEU

CAD (KiCad official)

Symbol: FT24C256A-ESR-T
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
`ft24c256a-esr-t.step`	122 KB	You want the bare part, or you mark your own boards.
`ft24c256a-esr-t-etched.step`	2.6 MB	You want the part with `FT24C256A-ESR-T` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 638 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: FMD Fremont Micro Devices datasheet (16 pp, sha256 265daf0b084f49aa, 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