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DS3231MZ/V+ 数据手册 - Maxim Integrated（美信）
制造商:
Maxim Integrated（美信）
分类:
实时时钟芯片
封装:
SOIC-8
描述:
为± 5ppm的， I2C实时时钟 ±5ppm, I2C Real-Time Clock
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DS3231MZ/V+数据手册
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若手册格式错乱，请下载阅览PDF原文件
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Typical Operating Circuit
General Description
The DS3231M is a low-cost, extremely accurate, I
2
C 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 microelec-
tromechanical systems (MEMS) resonator enhances the
long-term accuracy of the device and reduces the piece-
part count in a manufacturing line. The DS3231M is avail-
able 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
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 neces-
sary. Additionally, the RST pin is monitored as a pushbutton
input for generating a microprocessor reset. See the
Block Diagram for more details.
Applications
Power Meters
Industrial Applications
Ordering Information
Benets and Features
● Highly Accurate RTC With Integrated MEMS
Resonator Completely Manages All Timekeeping
Functions
• Complete Clock Calendar Functionality Including
Seconds, Minutes, Hours, Day, Date, Month, and
Year, with Leap-Year Compensation Up to Year
2100
• Timekeeping Accuracy ±5ppm (±0.432 Second/Day)
from -45°C to +85°C
• Footprint and Functionally Compatible to DS3231
• Two Time-of-Day Alarms
• 1Hz and 32.768kHz Outputs
• Reset Output and Pushbutton Input with Debounce
• Digital Temp Sensor with ±3°C Accuracy
• +2.3V to +5.5V Supply Voltage
● Simple Serial Interface Connects to Most
Microcontrollers
• Fast (400kHz) I
2
C Interface
● Battery-Backup Input for Continuous Timekeeping
• Low Power Operation Extends Battery-Backup
Run Time
● Operating Temperature Range: -40°C to +85°C
● 8-Pin or 16-Pin SO Packages
● Underwriters Laboratories
®
(UL) Recognized
19-5312; Rev 7; 3/15
Underwriters Laboratories is a registered certification mark of
Underwriters Laboratories Inc.
DS3231M
SCL
SDA
32KHZ V
BAT
INT/SQW
RST
+3.3V+3.3V
CPU
I/O PORT
INTERRUPTS
PART TEMP RANGE PIN-PACKAGE
DS3231MZ+
-45NC to +85NC
8 SO
DS3231MZ/V+
-45NC to +85NC
8 SO
DS3231M+
-45NC to +85NC
16 SO
DS3231M ±5ppm, I
2
C Real-Time Clock
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