ISL12027

Features:

• Real Time Clock/Calendar
- Tracks Time in Hours, Minutes, and Seconds
- Day of the Week, Day, Month, and Year
• 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
• 512 x 8 Bits of EEPROM
- 16-Byte Page Write Mode (32 total pages)
- 8 Modes of Block Lock™ Protection
- Single Byte Write Capability
• High Reliability
- Data Retention: 50 years
- Endurance: 500,000 Cycles Per Byte
• I²C* Interface
- 400kHz Data Transfer Rate
• 800nA Battery Supply Current
• Package Options
- 8 Ld SOIC and TSSOP Packages
• Pb-Free Plus Anneal Available (RoHS Compliant)




Application

• 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




Pinout






Specifications

Voltage on V_DD, V_BAT, SCL, SDA, and RESET pins
(respect to ground) . . . . . . . . . . . . . . . . . . . . . . . .... . . -0.3V to 6.0V
Voltage on X1 and X2 pins
(respect to ground) . . . . . . . . . . . . . . . . . . . . . . . . .... . -0.3V to 2.5V
ESD Rating (MIL-STD-883, Method 3014) . . . . . . . . . . . . . . .>±2kV
ESD Rating (Machine Model) . . . . . . . . . . . . . . . . . . . . . . . . .>175V




Description

The ISL12027 device is a low power real time clock with timing and crystal compensation, clock/calender, power-fail indicator, two periodic or polled alarms, intelligent battery backup switching, CPU Supervisor and integrated 512 x 8-bit EEPROM, in 16 Byte 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 ISL12027 has calendar registers for date, month, year and day of the week. The calendar is accurate through 2099, with automatic leap year correction.