Skip to main content
Log in
Microchip Technology 25LC640-I/P — Memory (DRAM / SRAM / Flash / EEPROM)

Microchip 25LC640-I/P 64Kbit SPI EEPROM, 2 MHz, 8-PDIP

MPN25LC640-I/P
End of Life

Microchip 25LC640-I/P, 64Kbit SPI EEPROM, 8K x 8 organization, 2 MHz clock, 2.5 V to 5.5 V supply, -40°C to 85°C, 8-PDIP through-hole package.

$1.06Ref. price · indicative, final on quote
Microchip Technology 25LC640-I/P datasheet (PDF)
Packaging8-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

25LC640-I/P specifications
ParameterValue
Memory typeNon-Volatile
MountingThrough Hole
Voltage2.5V ~ 5.5V
Frequency2 MHz
Memory interfaceSPI
Operating temperature-40°C ~ 85°C (TA)
PackageTube
TechnologyEEPROM
Memory size64Kbit
Memory formatEEPROM
Case8-DIP (0.300\", 7.62mm)
Memory organization8K x 8
Write cycle time - word, page5ms

Product details

64 Kbit SPI EEPROM in an 8-pin DIP — what you get

The Microchip 25LC640-I/P is a 64 Kbit serial EEPROM organized as 8K x 8 bits, accessed over an SPI bus at up to 2 MHz. It's packaged in an 8-lead PDIP (0.300" body), through-hole mount, so it fits sockets or hand-soldered prototypes without reflow. Write-cycle time is 5 ms per byte or per page, which is typical for this density tier. If you're logging configuration data or calibration constants, budget for that page-write latency in your firmware loop.

Frequently asked questions

Is 25LC640-I/P obsolete or still active?

It is still active — Microchip lists it as Active product status with no NRND or EOL flag. You can design it into new builds or replenish MRO stock without a last-time-buy deadline.

Can I replace 25LC640-I/P with 25LC640T-I/SN?

The 25LC640T-I/SN is a surface-mount SOIC variant of the same die — same 64 Kbit density, same SPI interface, same supply range. The only difference is the package: the -I/P is a through-hole PDIP, the -I/SN is an SOIC-8. If your board has a DIP socket, the -I/SN won't fit without an adapter.

Is 25LC640-I/P available in tube packaging?

Yes, the listed package is Tube. That's the standard through-hole shipping format for PDIP parts — 50 or 60 per tube depending on the factory batch.