
Zetta
ZD24C512A may serve as a larger I2C EEPROM alternative after pinout and firmware review.
AT24C64 is a 64Kbit I2C EEPROM in SOP-8. Current candidates do not show a verified pin-compatible replacement.
voltage matches kept parts
SOP-8 listed, dims unknown
capacity/addressing differ
kept parts are indexed
No verified pin-compatible candidate is present in this set.
Prefer an exact 64Kbit I2C SOP-8 EEPROM; otherwise review ZD24C512A as a larger functional option.
Pinout and I2C addressing are not verified.

Zetta
ZD24C512A may serve as a larger I2C EEPROM alternative after pinout and firmware review.
| Feature / factor | AT24C64 | ZD24C512A-SSGMB | ZD24C1MA-SSGMB | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOP-8 | SOP-8 | SOP-8 | SOP-8 — same catalog pkg; ZD24C1MA-SSGMB: pkg listed | |
| Pinout | AT24C64 pins | not provided | not provided | not provided — no pin map; ZD24C1MA-SSGMB: no pin map | |
| Voltage | 1.8-5.5V | 1.7-5.5V | 1.7-5.5V | 1.7-5.5V — range covers; ZD24C1MA-SSGMB: range covers | |
| Interface | I2C | I2C | I2C | I2C — same bus; ZD24C1MA-SSGMB: same bus | |
| Application | 64Kbit EEPROM | 512Kbit EEPROM | 1Mbit EEPROM | 512Kbit EEPROM / 1Mbit EEPROM — firmware impact; ZD24C1MA-SSGMB: firmware impact |
From this set, ZD24C512A-SSGMB is the closest functional option, but it is not verified as a direct replacement.