component

25LC640AT-E

Public Made by Adom

by adom

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

componentinterface ics25lc640at-efactory-2.0.0extractor-text

Verified 25LC640AT-E

by Ray · last 2 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

2 Nov 2026RayPublished by the parts factory: tier mfr, 8 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: 25LC640AT-E · SOIC-8 · 8 pins
  • ✓copper: 8 copper pads, none touching another net
  • ✓datasheet: all 8 pin names found in the 36-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: SOIC-8_3.9x4.9mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-f2n1tomx/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 8 pins = 8 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 8 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ 25lc640at-e.kicad_sym✓ 25lc640at-e.kicad_mod✓ 25lc640at-e.step
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3D Model

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Symbol & Footprint

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PCB Footprint

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Datasheet

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Contents

README

markdown

25LC640AT-E

Microchip Tech · Pre-ordered Chips · SOIC-8

25LC640AT-E 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, and a high level deselects it and forces it into Standby mode.
2 SO output Serial Data Output: data is shifted out after the falling edge of SCK during a read cycle, and SO goes to high-impedance when the device is deselected.
3 WP input Write-Protect input: when WPEN is set, a low level on WP disables writes to the nonvolatile bits in the STATUS register.
4 VSS power_in Ground reference for the device.
5 SI input Serial Data Input: instructions, addresses and data are latched on the rising edge of the serial clock SCK.
6 SCK input Serial Clock input that synchronizes communication: SI is latched on its rising edge and SO updates after its falling edge.
7 HOLD input Hold input: pulling it low while SCK is low pauses serial communication without resetting the sequence, and it must be held high when unused.
8 VCC power_in Supply voltage, specified as 2.5-5.5V for the 25LC640A.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SOIC-8
Category Interface ICs
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 gold TDFN (2x3), 8-lead Note 1: “Y” indicates a Nickel Palladium Gold (NiPdAu) finish. 33

CAD (KiCad official)

  • Symbol: 25LC640AT-E
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: 25lc640at-e-etched.step / 25lc640at-e-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 25lc640at-e.step / 25lc640at-e.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (36 pp, sha256 ebcb1515f1e4f55c, retrieved 2026-11-02, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-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