厂商Maxim Integrated 半导体半导体 DS3231 数据手册，datasheet pdf下载

型号：	DS3231
厂商：	Maxim Integrated
标准：
分类：	半导体
描述：	extremely accurate i2c-integrated
PDF：	预览
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Rev 6; 10/08

Extremely Accurate I C-Integrated

RTC/TCXO/Crystal

DS231

General Description

Features

♦ Accuracy ± 2ppm from 0°C to +40°C

The DS3231 is a low-cost, extremely accurate I C real-

time clock (RTC) with an integrated temperature-

compensated crystal oscillator (TCXO) and crystal. The

device incorporates a battery input, and maintains accu-

rate timekeeping when main power to the device is inter-

rupted. The integration of the crystal resonator enhances

the long-term accuracy of the device as well as reduces

the piece-part count in a manufacturing line. The DS3231

is available in commercial and industrial temperature

ranges, and is offered in a 16-pin, 300-mil SO package.

♦ Accuracy ± 3.5ppm from -40°C to +85°C

♦ Battery Backup Input for Continuous

Timekeeping

♦ Operating Temperature Ranges

Commercial: 0°C to +70°C

Industrial: -40°C to +85°C

♦ Low-Power Consumption

♦ Real-Time Clock Counts Seconds, Minutes,

Hours, Day, Date, Month, and Year with Leap Year

Compensation Valid Up to 2100

The RTC maintains 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 an AM/PM indicator. Two programmable time-of-

day alarms and a programmable square-wave output

are provided. Address and data are transferred serially

♦ Two Time-of-Day Alarms

♦ Programmable Square-Wave Output

♦ Fast (400kHz) I C Interface

♦ 3.3V Operation

♦ Digital Temp Sensor Output: ± 3°C Accuracy

♦ Register for Aging Trim

♦ RST Output/Pushbutton Reset Debounce Input

through an I C bidirectional bus.

♦ Underwriters Laboratories (UL ) Recognized

A precision temperature-compensated voltage refer-

ence and comparator circuit monitors the status of V

to detect power failures, to provide a reset output, and

to automatically switch to the backup supply when nec-

essary. Additionally, the RST pin is monitored as a

pushbutton input for generating a µP reset.

Ordering Information

TOP

PART

TEMP RANGE PIN-PACKAGE

MARK

DS3231S

DS3231SN

DS3231S#

0°C to +70°C 16 SO

DS3231SN# -40°C to +85°C 16 SO

Applications

Utility Power Meters

# Denotes a RoHS-compliant device that may include lead that

is exempt under RoHS requirements. The lead finish is JESD97

category e3, and is compatible with both lead-based and lead-

free soldering processes. A "#" anywhere on the top mark

denotes a RoHS-compliant device.

Servers

Telematics

GPS

Pin Configuration appears at end of data sheet.

Typical Operating Circuit

= t /C

R B

SCL

SDA

INT/SQW

32kHz

SCL

SDA

μP

BAT

RST

DS3231

PUSHBUTTON

RESET

N.C.

GND

UL is a registered trademark of Underwriters Laboratories, Inc.

______________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.