VERIFIED CROSS-REFERENCE
AT24C02 alternatives & equivalent parts
2-Kbit (256 x 8) 2-wire (I2C) serial EEPROM; 8-byte page writes; self-timed write cycle; 1M write cycles; 100-year data retention — common packages: 8-pin PDIP / JEDEC SOIC / TSSOP (family). Each candidate below cites its manufacturer datasheet; check the relationship badge before substituting.
4 verified alternatives for AT24C02
| Alternative | Manufacturer | Relationship | Key differences | Source |
|---|---|---|---|---|
| CAT24C02WI-GT3A | onsemi | Pin-to-pinDrop-in: same footprint and pinout. | SOIC-8 with active A0-A2 device address inputs, same pin arrangement; 16-byte page write buffer versus the 8-byte base page - verify firmware page handling; 1.7-5.5 V, 100/400 kHz, industrial temperature; third-party mirror of official datasheet. | 数据手册（第三方托管，购买前请核对原厂） |
| 24LC02B-I/SN | Microchip | FunctionalSame function: board or design change needed. | A0/A1/A2 are not internally connected - only bus address 0x50 is usable; 2.5-5.5 V, 400 kHz; 8-byte pages match the base; SOIC-8, industrial temperature. | Microchip 官方文档 |
| 24AA02-I/SN | Microchip | FunctionalSame function: board or design change needed. | A0/A1/A2 are not internally connected - only bus address 0x50 is usable; 1.7-5.5 V with clock-frequency restrictions below 2.5 V; 8-byte pages match the base; SOIC-8, industrial temperature. | Microchip 官方文档 |
| M24C02-RMN6TP | STMicroelectronics | Pin-to-pinDrop-in: same footprint and pinout. | SOIC-8 with active E0-E2 chip-enable/address pins, same pin arrangement; 16-byte page write buffer versus the 8-byte base page - verify firmware page handling; 1.8-5.5 V, 400 kHz. | ST 官方页面 |
Pre-replacement checklist
- A0-A2 are active address inputs (up to 8 devices per bus); replacements with NC address pins break multi-device addressing.
- Page-write size is 8 bytes; some replacements use 16-byte pages - check page boundaries in firmware.
- Original AT24C02 order codes are marked Obsolete; choose an active-family replacement.
Need the exact lot, date code or a second source quoted?
Send the original MPN and the approved alternative. Sourceics reconfirms source, stock, date code and commercial terms before any order — no substitution without your engineering approval.
Request a quote for AT24C02Source part reference: Microchip 官方文档. Equivalence notes are reference guidance, not a guarantee of fit — always verify against your schematic and layout.