DS3231S- MAXIM [Maxim Integrated Products], DS3231S- Datasheet

DS3231S-

Manufacturer Part Number

DS3231S-

Description

Extremely Accurate I2C-Integrated

Manufacturer

MAXIM [Maxim Integrated Products]

Datasheet

1.DS3231S-.pdf (20 pages)

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The DS3231 is a low-cost, extremely accurate I

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.

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

through an I

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.

19-5170; Rev 7; 3/10

Pin Configuration appears at end of data sheet.

UL is a registered trademark of Underwriters Laboratories, Inc.

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.

Servers

Telematics

C bidirectional bus.

μP

SDA

SCL

RST

General Description

PUSHBUTTON

Utility Power Meters

GPS

RESET

Extremely Accurate I

= t

Applications

______________________________________________ Maxim Integrated Products

C real-

N.C.

SCL

SDA

RST

N.C.

♦ Accuracy ±2ppm from 0°C to +40°C

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

♦ Battery Backup Input for Continuous

♦ Operating Temperature Ranges

♦ Low-Power Consumption

♦ Real-Time Clock Counts Seconds, Minutes,

♦ Two Time-of-Day Alarms

♦ Programmable Square-Wave Output

♦ Fast (400kHz) I

♦ 3.3V Operation

♦ Digital Temp Sensor Output: ±3°C Accuracy

♦ Register for Aging Trim

♦ RST Output/Pushbutton Reset Debounce Input

♦ Underwriters Laboratories (UL

DS3231

#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.

DS3231S#

DS3231SN#

GND

Timekeeping

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

Compensation Valid Up to 2100

PART

Commercial: 0°C to +70°C

Industrial: -40°C to +85°C

INT/SQW

32kHz

N.C.

RTC/TCXO/Crystal

BAT

-40°C to +85°C 16 SO

TEMP RANGE PIN-PACKAGE

Typical Operating Circuit

0°C to +70°C 16 SO

C Interface

Ordering Information

C-Integrated

) Recognized

Features

DS3231N

DS3231

MARK

TOP

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