ISL1219 is a low power real time clock from Intersil with Event Detect and Time Stamp function, timing and crystal compensation, clock/calendar, power fail indicator, periodic or polled alarm, intelligent battery backup switching and 2 Bytes of battery-backed user SRAM.
The ISL1219 is a low‑power real‑time clock with calendar, alarm, event‑detection and 2 bytes of battery‑backed SRAM. It operates from a 2.7 V to 5.5 V supply and can run in battery‑backup mode down to 1.8 V.
The device uses an external 32.768 kHz crystal, provides a 400 kHz I²C‑compatible interface, and is offered in a 10‑lead MSOP package. It is targeted at utility meters, set‑top boxes, POS equipment, networking gear and security applications.
| Supply voltage (Vpp) | 2.7 V to 5.5 V |
|---|---|
| Operating temperature range | -40 °C to +85 °C |
| Battery supply voltage (VeaT) | 1.8 V to 5.5 V |
| Package type | 10‑lead MSOP |
| SRAM size | 2 bytes (battery‑backed) |
| Crystal frequency | 32.768 kHz |
| I²C interface speed | 400 kHz |
It operates from 2.7 V up to 5.5 V on the Vpp pin.
It is offered in a 10‑lead Mini Small Outline Plastic (MSOP) package.
An external 32.768 kHz crystal is used as the time base.