AT24C64D in 24LCxx / AT24Cxx I2C EEPROM Family
The AT24C64D is a 64-Kbit serial Electrically Erasable and Programmable Read-Only Memory (EEPROM) family from Microchip Technology. Organized as 8,192 words of 8 bits each, this industrial-grade sub-family provides reliable non-volatile storage over a wide voltage range of 1.7V to 5.5V. It utilizes the I2C (2-wire) serial interface, offering a cost-effective solution for storing configuration data, calibration constants, and user preferences in space-constrained embedded systems and consumer electronics.
Variants in This Sub-Family
Comparing specs that differ across variants.
| Part Number | Access Time | Package | Clock Frequency | Voltage | Temp Range | Stock |
|---|---|---|---|---|---|---|
| AT24C64D-SSHM-T (Microchip (formerly Atmel)) | 550 ns | SOIC-8 | 1 M | 1.7V | -40degC ~ 85degC (.. | 18,231 |
| AT24C64D-XHM-T (Microchip Technology) | 550 ns | TSSOP-8 | 1 M | 1.7V | -40degC ~ 85degC (.. | 57,469 |
| AT24C64D-SSPD-T (Microchip Technology) | 900 ns | SOIC-8 | 400 k | 2.5V | -40degC ~ 125degC .. | — |
Variants within the AT24C64D family primarily differ by package type, operating temperature range, and maximum clock frequency. Common packages include SOIC, TSSOP, and UDFN. Specific suffixes like '-SSHM' denote lead-free NiPdAu plating and 1.7V-5.5V operation at 1 MHz, whereas '-SSPD' variants may be optimized for specific 400 kHz legacy timings or different operating temperature thresholds for automotive versus industrial applications.
