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25LC256T-I

Microchip Tech · EEPROM · SOP-8

25LC256T-I from Microchip Tech, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 CS input Chip Select input: a low level selects the device, a high level deselects it and forces Standby mode, and a low-to-high transition after a valid write sequence starts the internal write cycle.
2 SO tri_state Serial Data Output: data is shifted out after the falling edge of the serial clock, and the pin goes high-impedance when the device is deselected or HOLD is low.
3 WP input Write-Protect pin: when low and the WPEN bit is high, writes to the nonvolatile bits of the STATUS register are disabled, and the function is blocked when WPEN is low.
4 VSS power_in Ground.
5 SI input Serial Data Input: receives instructions, addresses and data, latched on the rising edge of the serial clock.
6 SCK input Serial Clock input (max. 10 MHz): synchronizes communication, with SI latched on the rising edge and SO updated after the falling edge.
7 HOLD input Hold input: pulled low (while SCK is low) to pause serial communication without deselecting the device, and must be held high when not used.
8 VCC power_in Supply voltage: 2.5V to 5.5V for the 25LC256, with an absolute maximum of 6.5V.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SOP-8
Category Memory
Pins 8

CAD (KiCad official)

  • Symbol: 25LC256T-I
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: 25lc256t-i-etched.step / 25lc256t-i-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 25lc256t-i.step / 25lc256t-i.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (32 pp, sha256 e39c106f2b850e86, retrieved 2026-10-22, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF