
1
FN6731.3
ISL12082
I2C-Bus
Real Time Clock with Two Interrupts, Alarm, and Timer
Low Power RTC with Battery ReSeal,
2 IRQs, Hundredths of a Second Time,
and Crystal Compensation
The ISL12082 device is a low power real time clock with
timing and crystal compensation, clock/calendar, power fail
indicator, 2 IRQs, periodic or polled alarm, timer/watchdog,
and intelligent battery backup switching.
The oscillator uses an external, low-cost 32.768kHz crystal.
The real time clock tracks time with separate registers for
hours, minutes, seconds and hundredths of a second. 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.
Pinouts
ISL12082
(8 LD SOIC)
TOP VIEW
ISL12082
(10 LD MSOP)
TOP VIEW
Features
Real Time Clock/Calendar
- Tracks Time in Hours, Minutes, Seconds, and
Hundredths of a Second
- Day of the Week, Day, Month, and Year
4 Selectable Frequency Outputs
Alarm
- Settable to the Second, Minute, Hour, Day of the Week,
Day, or Month
- Single Event or Pulse Interrupt Mode
Timer
- 4 Selectable Timer Functions
- 4 Selectable Timer Clock Frequencies
- Single Event or Pulse Interrupt Mode
Automatic Backup to Battery or Supercapacitor
Power Failure Detection
Battery ReSeal
On-Chip Oscillator Compensation
I2C Interface
- 400kHz Data Transfer Rate
800nA Battery Supply Current
Small Package Options
- 8 Ld SOIC Package
- 10 Ld MSOP Package
Pb-Free (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
1
2
3
4
8
7
X1
X2
GND
VDD
IRQ1/fOUT
SCL
SDA
IRQ2
5
6
VDD
IRQ1/fOUT
SCL
SDA
IRQ2
X1
X2
VBAT
NC
1
2
3
4
5
10
9
8
7
6
GND
Data Sheet
November 24, 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.
I2C Bus is a trademark owned by NXP Semiconductors Netherlands, B.V. Copyright Intersil Americas Inc. 2008. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.