Part Number : DS1340
Function : 2-Wire RTC with trickle charger
Manufacturer : Dallas Semiconductor -> Maxim Integrated
Pinout :
Description
General Description
The DS1340 is a real-time clock (RTC)/calendar that is
pin compatible and functionally equivalent to the ST
M41T00, including the software clock calibration. The
device additionally provides trickle-charge capability
on the VBACKUPpin, a lower timekeeping voltage, and
an oscillator STOP flag. Block access of the register
map is identical to the ST device. Two additional regis
ters, which are accessed individually, are required for
the trickle charger and flag. The clock/calendar pro
vides seconds, minutes, hours, day, date, month, and
year information. A built-in power-sense circuit detects
power failures and automatically switches to the back
up supply. Reads and writes are inhibited while the
clock continues to run. The device is programmed seri
ally through an I2C bidirectional bus.
Features
♦Enhanced Second Source for the ST M41T00
♦Available in a Surface-Mount Package with an
Integrated Crystal (DS1340C)
♦Fast (400kHz) I2C Interface
♦Software Clock Calibration
♦RTC Counts Seconds, Minutes, Hours, Day, Date,
Month, and Year
♦Automatic Power-Fail Detect and Switch Circuitry
♦Trickle-Charge Capability
♦Low Timekeeping Voltage Down to 1.3V
♦Three Operating Voltage Ranges (1.8V, 3V, and 3.3V)
♦Oscillator Stop Flag
♦Available in 8-Pin µSOP or SO Packages
♦Underwriters Laboratories (UL) Recognized
Datasheet PDF Download
Other datasheets in the file :
DS1340,DS1340C-18#,DS1340C-3#,DS1340C-33#,DS1340U-18+