ISL12026A
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
• 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)

Description

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.

The ISL12026 and ISL12026A have different types of Power Control Settings. The ISL12026 uses the Legacy Mode Setting, which follows conditions set in X1226 products. The ISL12026A uses the Standard Mode Setting. Please refer to "Power Control Operation" on page 13 for more details. Also, please refer to "I²C Communications During Battery Backup" on page 22 for important details.

Applications

• 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)