Datasheet > 1339

1339

更新时间： 2023-12-20 18:45:24

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
28页	1070K
描述
Real-Time Clock With Serial I2C Interface

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1339 数据手册

DATASHEET

Real-Time Clock with Serial I²C Interface

1339

Description

Features

The 1339 serial real-time clock (RTC) is a low-power

clock/date 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

clock/date 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. The 1339 has a built-in power-sense

circuit that detects power failures and automatically

switches to the backup supply, maintaining time, date, and

alarm operation.

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

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

valid up to 2100

• Packaged in 8-TSSOP, 8-SOIC, or 16-SOIC

(surface-mount package with an integrated crystal)

• Fast mode I²C Serial interface

• Two time-of-day alarms

• Programmable square-wave output

• Oscillator stop flag

• Automatic power-fail detect and switch circuitry

• Trickle-charge capability

Applications

• Handhelds (GPS, POS terminals)

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

• Underwriters Laboratory (UL) recognized

• Consumer Electronics (Set-Top Box, Digital Recording,

Network Applications)

• Office (Fax/Printers, Copiers)

• Medical (Glucometer, Medicine Dispensers)

• Telecomm (Routers, Switches, Servers)

• Other (Thermostats, Vending Machines, Modems, Utility

Meters)

Block Diagram

Crystal inside package

for 16-pin SOIC ONLY

1Hz / 4.096kHz /

8.192kHz / 32.768kHz

MUX/

32.768 kHz

Oscillator and

Divider

SQW/INT

Buffer

GND

Clock,

Calendar

Counter

Control

Logic

VCC

Power

Control

Trickle

Charger

V_BACKUP

SCL

SDA

I²C

Interface

1 Byte 7 Bytes 7 Bytes 1 Byte

Control

Buffer

Alarm Status

April 4, 2023

12 3 4 5 6 7...28

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