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Microchip Technology 25AA040A-I/P — Discrete Semiconductors

Microchip 25AA040A-I/P 4Kbit SPI EEPROM, 10 MHz, DIP-8

MPN25AA040A-I/P
End of Life

Microchip Technology 25AA040A-I/P SPI EEPROM, 4Kbit (512 x 8), 10 MHz clock, 1.8-5.5V supply, -40°C to 85°C, 8-DIP through-hole, Tube.

$0.66Ref. price · indicative, final on quote
Microchip Technology 25AA040A-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

25AA040A-I/P specifications
ParameterValue
Memory typeNon-Volatile
MountingThrough Hole
Supply voltage1.8V ~ 5.5V
Clock frequency10 MHz
Memory interfaceSPI
Operating temperature-40°C ~ 85°C (TA)
PackageTube
TechnologyEEPROM
Memory size4Kbit
Memory formatEEPROM
Case8-DIP (0.300\", 7.62mm)
Memory organization512 x 8
Write cycle time - word, page5ms

Product details

4 Kbit SPI EEPROM — 10 MHz clock, wide supply, through-hole

The 25AA040A-I/P: The 8-DIP through-hole package (8-PDIP) makes it breadboard-friendly and easy to hand-solder in prototypes or low-volume builds, but there is no surface-mount variant in this order code — if your pick-and-place line runs only SMD, you will need the SOIC or TSSOP sibling.

Active lifecycle — no end-of-life surprise

RoHS3 compliant per the manufacturer — no restricted substances above the threshold, so it passes EU and UKCA regulatory checks without an exemption claim.

Frequently asked questions

Will 25AA040A-I/P drop into a board specified around AT24C08D-PUM without rewiring?

No — the AT24C08D-PUM uses an I²C interface, while the 25AA040A-I/P uses SPI. The pinout and bus protocol are different; they are not drop-in replacements. A board spin or firmware change is required.