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ISL12008

I2C Real Time Clock with Battery Backup

Renesas Electronics 

DATASHEET

ISL12008 I2C Real Time Clock with Battery Backup

Low Power RTC with Battery ReSeal™ Function

FN6690

Rev 1.00

Sep 26, 2008

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.

Pinout

X1

X2

VBAT

GND

ISL12008

(8 LD SOIC)

TOP VIEW

1

8

2

7

3

6

4

5

VDD

FT/OUT

SCL

SDA

Ordering Information

PART

NUMBER

(Note)

PART

VDD

RANGE

MARKING (V)

TEMP.

RANGE PACKAGE PKG.

(°C) (Pb-free) DWG. #

ISL12008IB8Z 12008 IBZ 2.7 to 5.5 -40 to +85 8 Ld SOIC M8.15

ISL12008IB8Z-T* 12008 IBZ 2.7 to 5.5 -40 to +85 8 Ld SOIC M8.15

*Please refer to TB347 for details on reel specifications.

NOTE: These Intersil Pb-free plastic packaged products employ special

Pb-free material sets, molding compounds/die attach materials, and

100% matte tin plate plus anneal (e3 termination finish, which is 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.

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)

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

.

FN6690 Rev 1.00

Sep 26, 2008

Page 1 of 19

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