component

25LC640T-E

Public Made by Adom

by adom

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

componentmemory25lc640t-efactory-2.0.0extractor-text

Verified 25LC640T-E

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 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: 25LC640T-E · SOIC-8 · 8 pins
  • ✓copper: 8 copper pads, none touching another net
  • ✓datasheet: all 8 pin names found in the 24-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-81lmd6k9/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✓ 25lc640t-e.kicad_sym✓ 25lc640t-e.kicad_mod✓ 25lc640t-e.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 9h ago
viewers 25lc640t-e: viewers · Ray 9h ago
25lc640t-e-etched.glb Publish 0.1.0 · Ray 9h ago
25lc640t-e-etched.step 25lc640t-e: factory component page (tier=mfr) · Ray 9h ago
25lc640t-e-hero.glb 25lc640t-e: hero GLB from the etched model (keeps the MPN mark) · Ray 9h ago
25lc640t-e-hero.overlay.json Publish 0.1.0 · Ray 9h ago
25lc640t-e.glb Publish 0.1.0 · Ray 9h ago
25lc640t-e.kicad_mod Publish 0.1.0 · Ray 9h ago
25lc640t-e.kicad_sym Publish 0.1.0 · Ray 9h ago
25lc640t-e.lbr Publish 0.1.0 · Ray 9h ago
25lc640t-e.step Publish 0.1.0 · Ray 9h ago
package.json Publish 0.1.0 · Ray 9h ago
page.json Set visibility: public · Ray 9h ago
README.md Publish 0.1.0 · Ray 9h ago
verification.json Verified: Published by the parts factory: tier mfr, 8 pins · Ray 8h ago

25LC640T-E

Microchip Tech · EEPROM · SOIC-8

25LC640T-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, 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 that shifts data out after the falling edge of SCK during reads and goes to the high-impedance state when the device is deselected or HOLD is pulled low.
3 WP input Write-protect input that, when low while WPEN is high, disables writes to the nonvolatile bits in the STATUS register; the pin is blocked when WPEN is low.
4 VSS power_in Ground reference for the device; all inputs and outputs are specified with respect to VSS.
5 SI input Serial data input that receives instructions, addresses and data, latched on the rising edge of SCK.
6 SCK input Serial clock input; SI is latched on its rising edge and SO is updated after its falling edge.
7 HOLD input Hold input that pauses serial communication when pulled low while SCK is low, must be held high when unused, and tri-states SO when lowered.
8 VCC power_in Supply voltage; absolute maximum VCC is 7.0 V and the 25LC640 is specified at 2.5 V to 5.5 V (4.5 V to 5.5 V for the 3 MHz / 2.5 MHz rating).

Key specifications

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input low-level voltage (VIL1) VIL1 -0.3 0.8 V VCC ≥ 2.7V (Note 1) 2
Input high-level voltage (VIH1) VIH1 2 V VCC ≥ 2.7V (Note 1); printed max is VCC + 1 V, not numeric 2
Low-level output voltage VOL 0.4 V IOL = 2.1 mA 2
Input leakage current ILI -1 1 μA CS = VCC, VIN = VSS TO VCC 2
Output leakage current ILO -1 1 μA CS = VCC, VOUT = VSS TO VCC 2
Internal capacitance (all inputs and outputs) CINT 7 pF TA = 25°C, CLK = 1.0 MHz, VCC = 5.0V (Note 1) 2
Read operating current ICC 1 mA VCC = 5.5V; FCLK = 3.0 MHz; SO = Open 2
Write operating current ICC 5 mA VCC = 5.5V 2
Standby current ICCS 5 μA CS = VCC = 5.5V, Inputs tied to VCC or VSS 2
Clock frequency FCLK 3 MHz VCC = 4.5V to 5.5V (Note 2) 3
CS setup time TCSS 100 ns VCC = 4.5V to 5.5V 3
CS hold time TCSH 150 ns VCC = 4.5V to 5.5V 3
CS disable time TCSD 500 ns 3
Data setup time TSU 30 ns VCC = 4.5V to 5.5V 3
Data hold time THD 50 ns VCC = 4.5V to 5.5V 3
CLK rise time TR 2 μs (Note 1) 3
CLK fall time TF 2 μs (Note 1) 3
Clock high time THI 150 ns VCC = 4.5V to 5.5V 3
Clock low time TLO 150 ns VCC = 4.5V to 5.5V 3
Clock delay time TCLD 50 ns 3
Clock enable time TCLE 50 ns 3
Output valid from clock low TV 150 ns VCC = 4.5V to 5.5V 3
Output hold time THO 0 ns (Note 1) 3
Output disable time TDIS 200 ns VCC = 4.5V to 5.5V (Note 1) 3
HOLD setup time THS 100 ns VCC = 4.5V to 5.5V 3
HOLD hold time THH 100 ns VCC = 4.5V to 5.5V 3
HOLD low to output high-Z THZ 100 ns VCC = 4.5V to 5.5V (Note 1) 3
HOLD high to output valid THV 100 ns VCC = 4.5V to 5.5V 3
Internal write cycle time TWC 5 ms 3
Supply voltage VCC (E grade operating range) VCC 4.5 5.5 V Automotive (E) grade, TA = -40°C to +125°C 2
Ambient temperature range (E grade) TA -40 125 °C Automotive (E), VCC = 4.5V to 5.5V 2
VCC supply voltage (absolute maximum) VCC 7 V 2
Voltage on all inputs and outputs w.r.t. VSS (minimum) -0.6 V printed max is VCC + 1.0 V, not numeric 2
Storage temperature -65 150 °C 2
Ambient temperature under bias -65 125 °C 2
ESD protection on all pins 4 kV 2

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 Package P = Plastic DIP (300 mil Body), 8-lead SN = Plastic SOIC (150 mil Body), 8-lead 21

CAD (KiCad official)

  • Symbol: 25LC640T-E
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: 25lc640t-e-etched.step / 25lc640t-e-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 25lc640t-e.step / 25lc640t-e.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (24 pp, sha256 6c8e98edc6deaaf3, retrieved 2026-10-30, 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