The ISL12026 and the ISL12026A devices are micro power real time clocks with timing and crystal compensation, clock/calender, power-fail indicator, two periodic or polled alarms, intelligent battery backup switching, and integrated 512x8-bit EEPROM configured in 16 Bytes per page.

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.

特性 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

? 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

? 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)

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