X1205
2-Wire™ RTC Real Time Clock/Calendar
Typical Diagram
Key Features
- Real Time Clock/Calendar
- Tracks time in Hours, Minutes, and Seconds
- Day of the Week, Day, Month, and Year
- 2 Polled Alarms (Non-volatile)
- Settable on the Second, Minute, Hour, Day of the Week, Day, or Month
- Repeat Mode (periodic interrupts)
- Oscillator Compensation on chip
- Internal feedback resistor and compensation capacitors
- 64 position Digitally Controlled Trim Capacitor
- 6 digital frequency adjustment settings to ±30ppm
- Battery Switch or Super Cap Input
- 2-Wire™ Interface interoperable with I2C*
- 400kHz data transfer rate
- Low Power CMOS
- 1.25µA Operating Current (Typical)
- Small Package Options
- 8-Lead SOIC and 8-Lead TSSOP
- Repetitive Alarms
- Temperature Compensation
- Pb-Free Plus Anneal Available (RoHS Compliant)
Description
The X1205 device is a Real Time Clock with clock/calendar, two polled alarms, oscillator compensation, and battery backup switch.
The oscillator uses an external, low-cost 32.768kHz crystal. All compensation and trim components are integrated on the chip. This eliminates several external discrete components and a trim capacitor, saving board area and component cost.
The Real-Time Clock keeps track of time with separate registers for Hours, Minutes, and Seconds. The Calendar has separate registers for Date, Month, Year and Day-of-week. The calendar is correct through 2099, with automatic leap year correction.
Applications
- Utility Meters
- HVAC Equipment
- Audio / Video Components
- Set Top Box / Television
- Modems
- Network Routers, Hubs, Switches, Bridges
- Cellular Infrastructure Equipment
- Fixed Broadband Wireless Equipment
- Pagers / PDA
- POS Equipment
- Test Meters / Fixtures
- Office Automation (Copiers, Fax)
- Home Appliances
- Computer Products
- Other Industrial / Medical / Automotive
