Real Time Clock/Calendar with I2C Bus™ and EEPROM

The ISL12028 device is a low power real time clock with clock/calendar, power-fail indicator, clock output and crystal compensation, two periodic or polled alarms (CMOS output), intelligent battery backup switching, CPU Supervisor, integrated 512x8-bit EEPROM configured in 16 bytes per page.

Features

• Real Time Clock/Calendar

- Tracks time in Hours, Minutes and Seconds

- Day of the Week, Day, Month and Year

- 3 Selectable Frequency Outputs

• 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 SuperCap

- Power Failure Detection

- 800nA Battery Supply Current

• 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-Byte Page Write Mode (32 total pages)

- 8 Modes of BlockLock™ Protection

- Single Byte Write Capability

- Data Retention: 50 years

- Endurance: >2,000,000 Cycles Per Byte

• CPU Supervisor Functions:

- Power On Reset, Low Voltage Sense

- Watchdog Timer (0.25s, 0.75s and 1.75s)

• I2C Interface

- 400kHz Data Transfer Rate

• 14 Ld SOIC and 14 Ld TSSOP Packages

• Pb-Free (RoHS Compliant)

Applications

• Utility Meters

• HVAC Equipment

• 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