DS1340Z-33+;DS1340U-33+;DS1340Z-3+;DS1340Z-18+;DS1340C-33#;中文规格资料,Datasheet资料.pdfVIP

19-5578; Rev 7; 8/11 2 I C RTC with Trickle Charger General Description Features D The DS1340 is a real-time clock (RTC)/calendar that is ♦ Enhanced Second Source for the ST M41T00 S pin compatible and functionally equivalent to the ST ♦ Available in a Surface-Mount Package with an 1 3 M41T00, including the software clock calibration. The Integrated Crystal (DS1340C) 4 device additionally provides trickle-charge capability ♦ Fast (400kHz) I2C Interface on the VBACKUP pin, a lower timekeeping voltage, and an oscillator STOP flag. Block access of the register ♦ Software Clock Calibration 0 map is identical to the ST device. Two additional regis- ♦ RTC Counts Seconds, Minutes, Hours, Day, Date, ters, which are accessed individually, are required for Month, and Year the trickle charger and flag. The clock/calendar pro- ♦ Automatic Power-Fail Detect and Switch Circuitry vides seconds, minutes, hours, day, date, month, and ♦ Trickle-Charge Capability year information. A built-in power-sense circuit detects ♦ Low Timekeeping Voltage Down to 1.3V power failures and automatic