DS1375 Datasheet, PDF (1/11 Pages) Dallas Semiconductor – 2-Wire Digital Input RTC with Alarm

Rev 1; 1/04
2-Wire Digital Input RTC with Alarm
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 a 2-wire bidirectional bus.
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) 2-Wire Interface
♦ 1.7V to 5.5V Operation
Applications
RTC Complement to the DS32kHz TCXO
Utility Meters
Appliances
Consumer Electronics
Automotive
Ordering Information
PART
DS1375
TEMP RANGE PIN-PACKAGE TOP MARK
-40°C to +85°C 6 TDFN
DS1375
Typical Operating Circuit
+3V
RPU = tr/CB
RPU RPU
CPU
INT
VCC
SCL
CLK
SCA
DS1375
SQWINT
GND
VBAT
VCC
DS32kHz
GND
TOP VIEW
Pin Configuration
CLK 1
6 V_CC
SQW/INT 2
GND 3
DS1375
5 SCL
4 SDA
TDFN, EXPOSED PAD
3mm x 3mm x 0.8mm
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