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DS3231S/T&R 其他数据使用手册 - Maxim Integrated（美信）
制造商:
Maxim Integrated（美信）
分类:
实时时钟芯片
封装:
SOIC-16
描述:
实时时钟 Integrated RTC/TCXO/Crystal
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DS3231S/T&R数据手册
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DS3231
Extremely Accurate I
2
C-Integrated
RTC/TCXO/Crystal
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
General Description
The DS3231 is a low-cost, extremely accurate I
2
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.
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
2
C bidirectional bus.
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.
Applications
Servers Utility Power Meters
Telematics GPS
Features
o Accuracy ±2ppm from 0°C to +40°C
o Accuracy ±3.5ppm from -40°C to +85°C
o Battery Backup Input for Continuous
Timekeeping
o Operating Temperature Ranges
Commercial: 0°C to +70°C
Industrial: -40°C to +85°C
o Low-Power Consumption
o Real-Time Clock Counts Seconds, Minutes,
Hours, Day, Date, Month, and Year with Leap Year
Compensation Valid Up to 2100
o Two Time-of-Day Alarms
o Programmable Square-Wave Output
o Fast (400kHz) I
2
C Interface
o 3.3V Operation
o Digital Temp Sensor Output: ±3°C Accuracy
o Register for Aging Trim
o RST Output/Pushbutton Reset Debounce Input
o Underwriters Laboratories (UL) Recognized
19-5170; Rev 9; 1/13
Ordering Information
PART TEMP RANGE PIN-PACKAGE
DS3231S# 0°C to +70°C 16 SO
DS3231SN# -40°C to +85°C 16 SO
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
#Denotes an RoHS-compliant device that may include lead
(Pb) 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 an RoHS-compliant device.
DS3231
V
CC
SCL
R
PU
R
PU
= t
R
/C
B
R
PU
INT/SQW
32kHz
V
BAT
PUSHBUTTON
RESET
SDA
RST
N.C.
N.C.
N.C.
N.C.
V
CC
V
CC
GND
V
CC
µP
N.C.
N.C.
N.C.
N.C.
SCL
SDA
RST
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