Description
19-5801; Rev 0; 3/11 Low-Current SPI/3-Wire RTCs General .
The DS1343/DS1344 low-current real-time clocks (RTCs) are timekeeping devices that provide an extremely low standby current, permitting longer life fr.
Features
* S Low Timekeeping Current of 250nA (typ) S Compatible with Crystal ESR Up to 100kI S Versions Available to Support Either 6pF or 12.5pF Crystals S RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Valid Through 2099 S Power-Fail and Switch Circuitry S T
Applications
* Medical Handheld Devices
www. DataSheet4U. net
Typical Operating Circuit
VCC
Telematics Embedded Timestamping
RPU
VCC INT0 PF INT1 CE SCLK SDI SDO X1 DS1343 DS1344
INT RST μP 3-WIRE PORT
X2 VBAT
Ordering Information appears at end of data sheet. SERMODE GND
NOTE: SHOWN IN 3-WIRE I/O CONFIGURAT