Image DS3231
型号: DS3231
厂商: Maxim Integrated Maxim Integrated
标准:
分类: 半导体
描述: extremely accurate i2c-integrated
PDF: 预览
报错 收藏

Datasheet下载地址

本地下载 >>

DS3231的详细信息

  • 亲,您要的详细信息都在下载文档里了!

    本地下载

Rev 6; 10/08  
2
Extremely Accurate I C-Integrated  
RTC/TCXO/Crystal  
DS231  
General Description  
Features  
2
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  
2
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  
2
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  
CC  
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  
V
CC  
V
CC  
R
PU  
= t /C  
R B  
V
CC  
R
R
PU  
PU  
V
CC  
SCL  
SDA  
INT/SQW  
32kHz  
SCL  
SDA  
μP  
V
BAT  
RST  
RST  
DS3231  
PUSHBUTTON  
RESET  
N.C.  
N.C.  
N.C.  
N.C.  
N.C.  
N.C.  
N.C.  
N.C.  
GND  
UL is a registered trademark of Underwriters Laboratories, Inc.  
______________________________________________ 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.