®
ISL1208
I
2
C
®
Real Time Clock/Calendar
Data Sheet
July 29, 2005
FN8085.3
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.
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 Cap
• Power Failure Detection
• On-Chip Oscillator Compensation
Ordering Information
PART NUMBER MARKING
ISL1208IU8
ISL1208IU8-TK
ISL1208IU8Z
(See Note)
ISL1208IU8Z-TK
(See Note)
ISL1208IB8
ISL1208IB8-TK
ISL1208IB8Z
(See Note)
ISL1208IB8Z-TK
(See Note)
AGS
YWW
AGS
YWW
ANW
YWW
ANW
YWW
1208
YWW
1208
YWW
1208
YWWZ
1208
YWWZ
V
DD
RANGE
2.7V to
5.5V
2.7V to
5.5V
2.7V to
5.5V
2.7V to
5.5V
2.7V to
5.5V
2.7V to
5.5V
2.7V to
5.5V
2.7V to
5.5V
TEMP.
RANGE
(°C)
-40 to
+85
-40 to
+85
-40 to
+85
-40 to
+85
-40 to
+85
-40 to
+85
-40 to
+85
-40 to
+85
PACKAGE
8 Ld MSOP
8 Ld MSOP
Tape and Reel
8 Ld MSOP
(Pb-free)
8 Ld MSOP
Tape and Reel
(Pb-free)
8 Ld SOIC
8 Ld SOIC
Tape and Reel
8 Ld SOIC
(Pb-free)
8 Ld SOIC
Tape and Reel
(Pb-free)
• 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
• Pb-Free Plus Anneal 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
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both SnPb
and Pb-free soldering operations. Intersil Pb-free products are MSL classified
at Pb-free peak reflow temperatures that meet or exceed the Pb-free
requirements of IPC/JEDEC J STD-020.
* Contact Factory for availability.
Pinout
ISL1208
(8-PIN MSOP, SOIC)
TOP VIEW
X1
X2
V
BAT
GND
1
2
3
4
8
7
6
5
V
DD
IRQ/F
OUT
SCL
SDA
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2004, 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
INTERSIL [ INTERSIL CORPORATION ]
