ISL12025

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 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-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 Plus Anneal Available (RoHS Compliant)




Application

• 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




Pinout






Specifications

Voltage on VDD, VBAT, SCL, SDA, andRESET pins
(respect to ground) . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.0V
Voltage on X1 and X2 pins
(respect to ground) . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.5V
Latchup (Note 1) . . . . . . . . . . . . . . . . . . . Class II, Level B @ +85
ESD Rating (MIL-STD-883, Method 3014) . . . . . . . . . . . . . . .>±2kV
ESD Rating (Machine Model) . . . . . . . . . . . . . . . . . . . . . . . . .>175V
Thermal Information
Thermal Resistance (Note 2) _JA ( /W)
8 Ld SOIC Package . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . . . 120
8 Ld TSSOP Package . . . . . . . . . . . . . . . . . .. .. .. .. . . . . . . 140
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . .-65 to +150
Lead Temperature (Soldering, 10s) . . . . . . . . . . . . . . . . . . . . +300

*CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. Jedec Class II pulse conditions and failure criterion used. Level B exceptions are: Using a max positive pulse of 8.35V on all pins except X1 and X2, Using a max positive pulse of 2.75V on X1 and X2, and using a max negative pulse of -1V for all pins.
2. _JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.

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 ISL12025  has calendar registers for date, month, year and day of the week. The calendar is accurate through 2099, with automatic leap year correction.