2

FN8231.8

October 28, 2008

Block Diagram

Ordering Information

PART NUMBER

(Note)

PART

MARKING

(V)

BSW BIT DEFAULT

SETTING

TEMP RANGE

(°C)

PACKAGE

(Pb-Free)

PKG.

DWG. #

ISL12026IBZ*

12026 IBZ

BSW = 1

-40 to +85

8 Ld SOIC

M8.15

ISL12026IVZ*

2026 IVZ

BSW = 1

-40 to +85

8 Ld TSSOP

M8.173

ISL12026AIBZ*

12026A IBZ

2.2

BSW = 0

-40 to +85

8 Ld SOIC

M8.15

ISL12026AIVZ*

12026A IVZ

2.2

BSW = 0

-40 to +85

8 Ld TSSOP

M8.173

*Add “-T” suffix for tape and reel. 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.

X1

X2

OSCILLATOR

FREQUENCY

TIMER

LOGIC

DIVIDER

CALENDAR

8

CONTROL/

REGISTERS

1Hz

TIME

KEEPING

REGISTERS

ALARM REGS

COMPARE

CONTROL

DECODE

LOGIC

ALARM

(EEPROM)

(EEPROM)

SCL

SDA

SERIAL

INTERFACE

DECODER

4k

EEPROM

ARRAY

REGISTERS

STATUS

(SRAM)

SELECT

32.768kHz

(SRAM)

BATTERY

CIRCUITRY

SWITCH

OSC

COMPENSATION

Pin Descriptions

PIN NUMBER

SYMBOL

DESCRIPTION

SOIC

TSSOP

1

3

X1

The X1 pin is the input of an inverting amplifier and is intended to be connected to one pin of an external

32.768kHz quartz crystal. X1 can also be driven directly from a 32.768kHz source (see “Application Section”

on page 19.)

2

4

X2

The X2 pin is the output of an inverting amplifier and is intended to be connected to one pin of an external

32.768kHz quartz crystal (see “Application Section” on page 19.)

35

Interrupt Output/Frequency Output is a multi-functional pin that can be used as interrupt or frequency

output pin. The function is set via the control register. This output is an open drain configuration.

4

6

GND

Ground.

5

7

SDA

Serial Data (SDA) is a bidirectional pin used to transfer serial data into and out of the device. It has an open

drain output and may be wire OR’ed with other open drain or open collector outputs.

6

8

SCL

The Serial Clock (SCL) input is used to clock all serial data into and out of the device. The input buffer on

this pin is always active (not gated).

71

82

Power Supply.

ISL12026, ISL12026A