ISL12025
Real-Time Clock/Calendar with I²C Bus™ and EEPROM

Key Features

• Real-Time Clock/Calendar
• Tracks Time in Hours, Minutes and Seconds
• Day of the Week, Day, Month and Year
• 64-Bit Unique ID
• Two Non-Volatile Alarms
• Settable on the Second, Minute, Hour, Day of the Week, Day or Month
• Repeat Mode (Periodic Interrupts)
• Automatic Backup to Battery or Super Cap
• On-Chip Oscillator Compensation
• Internal Feedback Resistor and Compensation Capacitors
• 64 Position Digitally Controlled Trim Capacitor
• 6 Digital Frequency Adjustment Settings to ±30ppm
• 512x8-Bits of EEPROM
• 16-Bytes Page Write Mode (32 total pages)
• 8 Modes of Block Lock™ Protection
• Single Byte Write Capability
• High Reliability
• Data Retention: 50 years
• Endurance: 2,000,000 Cycles Per Byte
• I²C Interface
• 400kHz Data Transfer Rate
• 800nA Battery Supply Current
• Package Options
• 8 Ld SOIC and 8 Ld TSSOP Packages
• Pb-Free (RoHS Compliant)

Description

The ISL12025 device is a low power real-time clock with timing and crystal compensation, clock/calender, 64-bit unique ID, power-fail indicator, two periodic or polled alarms, intelligent battery backup switching, CPU Supervisor and integrated 512x8-bit EEPROM, in a 16 Bytes per page format.

The oscillator uses an external, low-cost 32.768kHz crystal. The real-time clock tracks time with separate registers for hours, minutes, and seconds. The device has calendar registers for date, month, year and day of the week. The calendar is accurate through 2099, with automatic leap year correction.

Applications

• Utility Meters
• Audio/Video Components
• 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