DS3231M_1112 datasheet, PDF - EEWORLD Datasheet

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DS3231M_1112: Description5ppm, I2C Real-Time Clock; File Size942KB，20 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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DS3231M_1112 Overview

5ppm, I2C Real-Time Clock

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19-5312; Rev 3; 12/11

±5ppm, I

C Real-Time Clock

General Description

The DS3231M is a low-cost, extremely accurate, I

real-time clock (RTC). The device incorporates a battery

input and maintains accurate timekeeping when main

power to the device is interrupted. The integration of

the microelectromechanical systems (MEMS) resona-

tor enhances the long-term accuracy of the device and

reduces the piece-part count in a manufacturing line.

The DS3231M is available in the same footprint as the

popular DS3231 RTC.

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 1Hz output are provided. Address and

data are transferred serially through an I

C bidirectional

bus. A precision temperature-compensated voltage

reference and comparator circuit monitors the status of

to detect power failures, to provide a reset output,

and to automatically switch to the backup supply when

necessary. Additionally, the

RST

pin is monitored as a

pushbutton input for generating a microprocessor reset.

See the

Block Diagram

for more details.

Features

S Timekeeping_Accuracy_Q5ppm_(Q0.432_Second/

Day)_from_-40NC_to_+85NC

S Battery_Backup_for_Continuous_Timekeeping

S Low_Power_Consumption

S Footprint_and_Functionally_Compatible_to_DS3231

S Complete_Clock_Calendar_Functionality_Including_

Seconds,_Minutes,_Hours,_Day,_Date,_Month,_and_

Year_with_Leap_Year_Compensation_Up_to_Year_

2100

S Two_Time-of-Day_Alarms

S 1Hz_and_32.768kHz_Outputs

S Reset_Output_and_Pushbutton_Input_with_

Debounce

S Fast_(400kHz)_I

C-Compatible_Serial_Bus

S +2.3V_to_+5.5V_Supply_Voltage

S Digital_Temp_Sensor_with_Q3NC_Accuracy

S -40NC_to_+85NC_Temperature_Range

S 8-Pin_or_16-Pin_SO_Packages

S Underwriters_Laboratories_(UL)_Recognized

DS3231M

Applications

Power Meters

Industrial Applications

+3.3V

Typical Operating Circuit

+3.3V

Ordering Information

PART

DS3231MZ+

DS3231MZ/V+

DS3231M+

TEMP_RANGE

-40NC to +85NC

PIN-PACKAGE

8 SO

16 SO

INTERRUPTS

CPU

I/O PORT

SCL

SDA

32KHZ

INT/SQW

RST

DS3231M

BAT

+Denotes

a lead(Pb)-free/RoHS-compliant package.

/V denotes an automotive qualified part.

Note:

Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

may be simultaneously available through various sales channels. For information about device errata, go to:

www.maxim-ic.com/errata.

________________________________________________________________ _Maxim

Integrated Products_

_ 1

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.

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