Key facts
- Brand
- Intersil
- Model
- ISL1209
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-04
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Intersil ISL1209 Real Time Clock/Calendar Datasheet
The ISL1209 is a low‑power real‑time clock/calendar IC that provides time‑keeping, alarm, event detection, and a 2‑byte battery‑backed SRAM. It operates from a 2.7 V to 5.5 V supply and can switch to a backup source (battery or super‑capacitor) when main power is lost.
Key features include 15 selectable frequency outputs, a programmable interrupt/frequency pin, tamper/event detection with optional glitch filtering, and an I²C interface capable of 400 kHz data transfers. The device is supplied in a 10‑lead MSOP package and is RoHS‑compliant.
Intersil ISL1209 specifications
| Supply voltage (VDD) | 2.7‑5.5 V |
|---|---|
| Backup supply voltage (VBAT) | 1.8‑5.5 V |
| Package | 10‑lead MSOP |
| Supply current (IDD1) at VDD=5 V | ≈2‑6 µA |
| I²C data rate | 400 kHz |
| Operating temperature range | -40 °C to +85 °C |
All Intersil ISL1209 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the I²C data transfer rate?
The I²C interface operates at a 400 kHz data transfer rate.
How much current does the device draw in low‑power mode?
In low‑power mode (LPMODE = 1) the device draws about 1.4 µA at VDD = 5 V.