Rainbow Electronics DS1375 - Manual

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.
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) 2-Wire Interface
♦ 1.7V to 5.5V Operation
DS1375
2-Wire Digital Input RTC with Alarm
______________________________________________ Maxim Integrated Products 1
TOP VIEW
DS1375
SQW/INT
SDA GND
1 6 V CC
5 SCL
CLK
THIN QFN
2
3 4
Pin Configuration
Ordering Information
DS1375
V CC
SCL CLK
SCA
GND
CPU
+3V
RPU RPU
RPU = t r /C B
INT
DS32kHz
V BAT
V CC
GND
SQWINT
Typical Operating Circuit
Rev 0; 4/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART TEMP RANGE PIN-PACKAGE TOP MARK
DS1375 -40°C to +85°C 6 Thin QFN DS1375