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Microchip Technology 25LC040T/SN — Microcontrollers & Processors (MCU / MPU / DSP)
Microchip Technology

Microchip 25LC040T/SN 4Kbit SPI EEPROM, 2 MHz, 8-SOIC

MPN25LC040T/SN
End of Life

Microchip 25LC040T/SN, 4Kbit SPI EEPROM, 2 MHz clock, 512 x 8 organization, 2.5V–5.5V supply, 8-SOIC surface mount, 0°C to 70°C operating temperature.

$0.68Ref. price · indicative, final on quote
25LC040T/SN datasheet
Packaging8-SOIC (0.154", 3.90mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

25LC040T/SN Technical Specifications
ParameterValue
Memory typeNon-Volatile
Mounting typeSurface Mount
Voltage2.5V ~ 5.5V
Frequency2 MHz
Memory interfaceSPI
Operating temperature0°C ~ 70°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
TechnologyEEPROM
Memory size4Kbit
Memory formatEEPROM
Case8-SOIC (0.154\", 3.90mm Width)
Memory organization512 x 8
Write cycle time - word, page5ms

Product details

4Kbit SPI EEPROM for parameter storage

The Microchip 25LC040T/SN is a 4Kbit serial EEPROM with an SPI interface, organized as 512 x 8 bytes. It runs at a 2 MHz clock rate and operates from 2.5V to 5.5V, making it a drop-in fit for both 3.3V and 5V microcontroller designs. The 5ms write cycle time is typical for this density class — firmware needs to poll the write-in-progress bit or insert a delay after each page write.

Active lifecycle, ROHS3 compliant

The 8-SOIC package is widely stocked across distribution, and the Tape & Reel suffix (T/SN) indicates reeled delivery for automated assembly.

Frequently asked questions

Is 25LC040T/SN RoHS compliant?

Yes, the 25LC040T/SN is ROHS3 compliant per the manufacturer's listing.

What is the difference between 25LC040T/SN and 25LC040T-I/SN?

All other specs — 4Kbit density, 2 MHz SPI, 2.5V–5.5V supply, 8-SOIC package — are identical.

How fast is the SPI bus on 25LC040T/SN?

The SPI clock frequency is 2 MHz maximum. This is adequate for reading/writing calibration data or configuration tables but not for streaming large blocks.