ISL12025 is a low power real-time clock with timing and crystal compensation, clock/calendar, 64-bit unique ID, power-fail indicator, two periodic or polled alarms, intelligent battery backup switching, CPU Supervisor and integrated 512 x 8-bit EEPROM, in a 16 Bytes per page format.
The ISL12025 device is a real‑time clock with calendar, two polled alarms, 512 × 8‑bit EEPROM, oscillator compensation, CPU supervisor functions (POR, low‑voltage sensing, watchdog timer) and battery‑backup switch. It operates from 2.7 V to 5.5 V and the calendar is accurate through 2099 with automatic leap‑year correction.
The part includes a serial I²C interface (up to 400 kHz), a unique 64‑bit ID, and eight block‑lock modes for EEPROM protection. Pin functions, absolute maximum ratings, electrical specifications, timing diagrams and package dimensions are detailed in the document.
| Supply Voltage (Vpp) | 2.7 V to 5.5 V |
|---|---|
| EEPROM Size | 512 × 8 bits (4 kbits) |
| EEPROM Endurance | 2,000,000 write cycles |
| I²C Bus Frequency | up to 400 kHz |
The device operates from 2.7 V to 5.5 V supply voltage.
It includes a 512 × 8‑bit EEPROM (4 kbits) organized in 16‑byte pages.
The I²C interface supports up to 400 kHz clock frequency.