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25AA640A-I

Public Made by Adom

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Microchip Tech EEPROM, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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25AA640A-I

Microchip Tech · EEPROM · SOIC-8

25AA640A-I from Microchip Tech, in a SOIC-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 an internal write cycle.
2 SO tri_state Serial Data Output: data is shifted out on this pin after the falling edge of SCK, and it goes high-impedance when the device is deselected or HOLD is low.
3 WP input Write-Protect pin: with WPEN set, WP low disables writes to the nonvolatile STATUS register bits, and WP high allows normal operation.
4 VSS power_in Ground.
5 SI input Serial Data Input: receives instructions, addresses and data, latched on the rising edge of SCK.
6 SCK input Serial Clock input (maximum 10 MHz) that synchronizes communication: inputs are latched on the rising edge and SO is updated after the falling edge.
7 HOLD input Hold input: pulling it low (while SCK is low and CS is low) pauses serial communication without resetting the sequence, and it must be held high when not in use.
8 VCC power_in Supply voltage, 1.8V to 5.5V for the 25AA640A.

Key specifications

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

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin 8-Lead Plastic Small Outline (SN) - Narrow, 3.90 mm (.150 In.) Body [SOIC] A A2 24

CAD (KiCad official)

  • Symbol: 25AA640A-I
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: 25aa640a-i-etched.step / 25aa640a-i-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 25aa640a-i.step / 25aa640a-i.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (38 pp, sha256 680e11bed3252688, retrieved 2026-10-27, 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