ISL12008

I2 C Real Time Clock with Battery Backup Low Power RTC with Battery ReSeal™ Function

Product Status: Mass Production

OVERVIEW

The ISL12008 device is a low power real time clock/calendar that is pin compatible and functionally equivalent to the ST M41T00S and Maxim DS1340 with timing and crystal compensation. The device additionally provides power-fail indicator, software alarm and intelligent battery backup.

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.

KEY FEATURES

  • Pin Compatible to ST M41T00S and Maxim DS1340
  • Functionality Equivalent to ST M41T00S and Maxim DS1340
  • Real Time Clock/Calendar
  • Tracks Time in Hours, Minutes, Seconds and Sub-seconds
  • Day of the Week, Day, Month, and Year
  • 512Hz Frequency Outputs for On-Chip Crystal Compensation
  • Software Alarm
  • Settable to the Second, Minute, Hour, Day of the Week, Day, or Month
  • Automatic Low-Drop Battery Switch for Longest Backup Life
  • Power Failure Detection
  • Battery ReSeal™ for Long Shelf Life
  • I2C Bus™
  • 400kHz Data Transfer Rate
  • 800nA Battery Supply Current
  • Small Package Option
  • 8 Ld SOIC
  • Pb-Free (RoHS Compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL12008
Basic Information
Production Status
Mass Production
Supply Voltage Vcc (Min) (V)
2.7
Supply Voltage Vcc (Max) (V)
5.5
VBAT (min)
1.8 V
VBAT (max)
5.5 V
IBAT (nA)
800
Alarms
1
Crystal Frequency Trimming
Yes
Selectable Frequency Output
1
CPU Supervisory Function POR
No
CPU Supervisory Function Watchdog Timer
No
Battery Seal
Yes
Battery Backup
Yes
FOUT
FOUT
RESET_bar
No
Oscillator Compensation (ppm)
-94 to +140
Memory Type
RAM
Bus/Output Interface
I2C
Time Keeping Current
1.6 µA
IRQ Pin
No
Freq. Out Pin
Yes
Timer
No
Tamper Detect
No
Reset
No
Qualification Level
Standard
Battery Voltage Range (V)
1.8 to 5.5
Supply Voltage Vcc Range (V)
2.7 to 5.5
Can Sample
YES
Temperature Range
-40 to +85

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