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General Description
The DS1375 digital real-time clock (RTC) is a low-power
clock/calendar that does not require a crystal. The
device operates from a digital clock input pin at one of
four frequencies: 32.768kHz, 8.192kHz, 60Hz, or 50Hz.
It 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/date
alarms, a programmable square-wave output, and 16
bytes of SRAM are provided. Address and data are
transferred serially through an I2C bidirectional bus.
Applications
RTC Complement to the DS32kHz TCXO
Utility Meters
Appliances
Consumer Electronics
Automotive
Features
RTC Counts Seconds, Minutes, Hours, Day, Date,
Month, and Year with Leap-Year Compensation
Valid Up to 2100
Two Programmable Alarms
Programmable Square-Wave Output
Operates from a 32.768kHz, 8.192kHz, 60Hz, or
50Hz Digital Clock Signal
16 Bytes of SRAM
Fast (400kHz) I2C Interface
1.7V to 5.5V Operation
DS1375
I2C Digital Input RTC with Alarm
______________________________________________
Maxim Integrated Products
1
16
CLK
VCC
25
SQW/INT
SCL
34
GND
SDA
TDFN
(3mm
× 3mm)
TOP VIEW
+
DS1375
*EP
*EXPOSED PAD
Pin Configuration
Ordering Information
DS1375
VCC
SCL
CLK
SCA
GND
CPU
+3V
RPU
RPU = tr/CB
INT
DS32kHz
VBAT
VCC
GND
SQWINT
Typical Operating Circuit
Rev 2; 9/08
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.
PART
TEMP RANGE
PIN-PACKAGE
TOP MARK
DS1375T+
-40°C to +85°C
6 TDFN-EP*
DS1375
+
Denotes a lead-free/RoHS-compliant package.
*
EP = Exposed pad.
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