1

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ISL12025

Real-Time Clock/Calendar with EEPROM

The ISL12025 device is a low power real-time clock with

timing and crystal compensation, clock/calender, 64-bit

unique ID, power-fail indicator, two periodic or polled alarms,

intelligent battery backup switching, CPU Supervisor and

integrated 512 x 8-bit EEPROM, in a 16 Bytes per page

format.

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.

Pinouts

ISL12025

(8 LD SOIC)

TOP VIEW

ISL12025

(8 LD TSSOP)

TOP VIEW

Features

• Real-Time Clock/Calendar

- Tracks Time in Hours, Minutes, and Seconds

- Day of the Week, Day, Month, and Year

• 64-bit Unique ID

• Two Non-Volatile Alarms

- Settable on the Second, Minute, Hour, Day of the Week,

Day, or Month

- Repeat Mode (periodic interrupts)

• Automatic Backup to Battery or SuperCap

• On-Chip Oscillator Compensation

- Internal Feedback Resistor and Compensation

Capacitors

- 64 Position Digitally Controlled Trim Capacitor

- 6 Digital Frequency Adjustment Settings to ±30ppm

• 512 x 8 Bits of EEPROM

- 16-Bytes Page Write Mode (32 total pages)

- 8 Modes of Block Lock™ Protection

- Single Byte Write Capability

• High Reliability

- Data Retention: 50 years

- Endurance: 2,000,000 Cycles Per Byte

- 400kHz Data Transfer Rate

• 800nA Battery Supply Current

• Package Options

- 8 Ld SOIC and 8 Ld TSSOP Packages

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• Utility Meters

• Audio/Video Components

• 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

VOLTAGE

TEMP.

RANGE

(°C)

PACKAGE

(Pb-Free)

PKG.

DWG.

#

ISL12025IBZ 12025IBZ

2.63V

-40 to +85 8 Ld SOIC

M8.15

ISL12025IVZ 2025IVZ

2.63V

-40 to +85 8 Ld TSSOP M8.173

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.

Add “-T” suffix for tape and reel.

X1

X2

RESET

SCL

SDA

GND

1

2

3

4

7

8

6

5

X1

X2

RESET

SCL

SDA

GND

1

2

3

4

7

8

6

5

New Features

Data Sheet

FN6371.1

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

1-888-INTERSIL or 1-888-468-3774

All other trademarks mentioned are the property of their respective owners.

October 18, 2006