1
®
FN8085.8
ISL1208
I
2
C
®
Real Time Clock/Calendar
Low Power RTC with Battery Backed
SRAM
The ISL1208 device is a low power real time clock with
timing and crystal compensation, clock/calendar, power fail
indicator, periodic or polled alarm, intelligent battery backup
switching and battery-backed user SRAM.
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.
Pinout
ISL1208
(8 LD MSOP, SOIC)
TOP VIEW
ISL1208
(8 LD TDFN)
TOP VIEW
Features
• Real Time Clock/Calendar
- Tracks Time in Hours, Minutes, and Seconds
- Day of the Week, Day, Month, and Year
• 15 Selectable Frequency Outputs
• Single Alarm
- Settable to the Second, Minute, Hour, Day of the Week,
Day, or Month
- Single Event or Pulse Interrupt Mode
• Automatic Backup to Battery or Super Capacitor
• Power Failure Detection
• On-Chip Oscillator Compensation
• 2 Bytes Battery-Backed User SRAM
•I
2
C Interface
- 400kHz Data Transfer Rate
• 400nA Battery Supply Current
• Same Pin Out as ST M41Txx and Maxim DS13xx Devices
• Small Package Options
- 8 Ld MSOP and SOIC Packages
- 8 Ld TDFN Package
• Pb-Free Available (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
1
2
3
4
8
7
X1
X2
VBAT
VDD
IRQ
/FOUT
SCL
SDA
GND
5
6
2
3
4
1
7
6
5
8
X1
X2
VBAT
GND
VDD
IRQ
/FOUT
SCL
SDA
Data Sheet September 12, 2008
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.
Copyright Intersil Americas Inc. 2004-2006, 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
