1

®

FN6313.0

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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Copyright Intersil Americas Inc. 2006. All Rights Reserved

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ISL1218

Low Power RTC with Battery Backed

SRAM

The ISL1218 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

ISL1218

(8 LD MSOP, SOIC)

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 Cap

• Power Failure Detection

• On-Chip Oscillator Compensation

• 8 Bytes Battery-Backed User SRAM

- 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

Ordering Information

PART

NUMBER

(Note)

PART

MARKING

RANGE

TEMP.

RANGE

(°C)

PACKAGE

(Pb-Free)

ISL1218IBZ

1218IBZ

2.7V to

5.5V

-40 to +85 8 Ld SOIC

ISL1218IBZ-T

1218IBZ

2.7V to

5.5V

-40 to +85 8 Ld SOIC

Tape and Reel

ISL1218IUZ

1218Z

2.7V to

5.5V

-40 to +85 8 Ld MSOP

ISL1218IUZ-T

1218Z

2.7V to

5.5V

-40 to +85 8 Ld MSOP

Tape and Reel

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.

1

2

3

4

8

7

X1

X2

SCL

SDA

GND

5

6

Data Sheet

June 22, 2006