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.