ISL12027
®
New Features
October 18, 2006
Data Sheet
FN8232.4
Real Time Clock/Calendar with EEPROM
Features
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.
• 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
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.
- Repeat Mode (periodic interrupts)
• Automatic Backup to Battery or SuperCap
• On-Chip Oscillator Compensation
- Internal Feedback Resistor and Compensation
Capacitors
Pinouts
- 64 Position Digitally Controlled Trim Capacitor
ISL12027
(8 LD TSSOP)
TOP VIEW
- 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
V
BAT
SCL
1
2
8
7
6
5
V
SDA
DD
X1
X2
GND
RESET
3
4
• High Reliability
- Data Retention: 50 years
- Endurance: >2,000,000 Cycles Per Byte
ISL12027
(8 LD SOIC)
TOP VIEW
• I2C* Interface
- 400kHz Data Transfer Rate
• 800nA Battery Supply Current
V
X1
X2
DD
1
2
8
7
6
5
V
• Package Options
BAT
- 8 Ld SOIC and 8 Ld TSSOP Packages
SCL
SDA
RESET
GND
3
4
• Pb-Free Plus Anneal Available (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
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
*I2C is a Trademark of Philips. Copyright Intersil Americas Inc. 2005, 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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