component

AT24C256M

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by Ray

HGSEMI EEPROM, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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AT24C256M

HGSEMI · EEPROM · SOP-8

AT24C256M from HGSEMI, 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. Hardwired to VIH or VIL to set the slave address; if left unconnected it is internally recognized as VIL.
2 A1 input Device/chip select address input bit 1. Hardwired to VIH or VIL to set the slave address; if left unconnected it is internally recognized as VIL.
3 A2 input Device/chip select address input bit 2. Hardwired to VIH or VIL to set the slave address; if left unconnected it is internally recognized as VIL.
4 GND power_in Ground reference for the device.
5 SDA bidirectional Serial data line. Bi-directional, open-drain output; requires an external pull-up resistor and can be wire-OR'd with other open-drain devices on the two-wire bus.
6 SCL input Serial clock input. Rising edge latches data into the EEPROM; falling edge clocks data out. Max 1 MHz at 2.5-5V, 400 kHz at 1.8V.
7 WP input Write-protect input. Tie to VIL (or leave unconnected) to allow programming; tie to VIH/VCC to disable all program/erase operations. Read operations are unaffected.
8 VCC power_in Supply voltage input, 1.8V to 5.5V. Absolute maximum 8V; decouple locally with a 0.1 uF ceramic capacitor to GND.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package SOP-8
Category Memory
Pins 8

CAD (KiCad official)

  • Symbol: AT24C256M
  • 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: HGSEMI datasheet (11 pp, sha256 d7220784e4d64aba, 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