1337CSRI datasheet(1/24 Pages) IDT

No de pièce	1337CSRI

Description	REAL-TIME CLOCK WITH I2C SERIAL INTERFACE

PDF	24 Pages

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Fabricant	IDT [Integrated Device Technology]

Site Internet	http://www.idt.com

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DATASHEET

REAL-TIME CLOCK WITH I2C SERIAL INTERFACE

IDT1337

IDT™ REAL-TIME CLOCK WITH I2C SERIAL INTERFACE

1

IDT1337

REV J 111009

General Description

The IDT1337 device is a low power serial real-time clock

(RTC) device with two programmable time-of-day alarms

and a programmable square-wave output. Address and

data are transferred serially through an I2C bus. The device

provides seconds, minutes, hours, day, date, month, and

year information. The date at the end of the month is

automatically adjusted for months with fewer than 31 days,

including corrections for leap year. The clock operates in

either the 24-hour or 12-hour format with AM/PM indicator.

Applications

• Telecommunication (Routers, Switches, Servers)

• Handhelds (GPS, POS terminals, MP3 players)

• Set-Top Box, Digital Recording,

• Office (Fax/Printers, Copiers)

• Medical (Glucometer, Medicine Dispensers)

• Other (Thermostats, Vending Machines, Modems, Utility

Meters, Digital Photo Frame devices)

Features

• Real-Time Clock (RTC) counts seconds, minutes, hours,

day, date, month, and year with leap-year compensation

valid up to 2100

• Packaged in 8-pin MSOP, 8-pin SOIC, or 16-pin SOIC

(surface-mount package with an integrated crystal)

• I2C Serial interface (Normal and Fast modes)

• Two time-of-day alarms

• Oscillator Stop Flag

• Programmable square-wave output defaults to 32 kHz on

power-up

• Operating voltage of 1.8 to 5.5 V

• Industrial temperature range (-40 to +85°C)

Block Diagram

SCL

SDA

Crystal inside package

for 16-pin SOIC ONLY

X1

X2

1 Hz/4.096 kHz/

8.192 kHz/32.768 kHz

SQW/INTB

I

2C

Interface

32.768 kHz

Oscillator and

Divider

Control

Logic

MUX/

Buffer

Clock,

Calendar

Counter

1 Byte

Control

7 Bytes

Buffer

Alarm

Registers

INTA

VCC

GND

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