The low-voltage serial-peripheral interface (SPI™) DS1390/DS1391 and the low-voltage 3-wire DS1392/DS1393 real-time clocks (RTCs) are clocks/calendars that provide hundredths of a second, seconds, minutes, hours, day, date, month, and year information.
Features
♦Reset Output/Debounced Input (DS1391/DS1393)
♦Separate SQW and INT Output (DS1392)
♦Trickle-Charge Capability
♦SPI Supports Modes 0 and 2 (DS1394)
♦SPI Supports Modes 1 and 3 (DS1390/DS1391)
♦3-Wire Interface (DS1392/DS1393)
♦4MHz at 3.0V and 3.3V
♦1MHz at 1.8V
♦Three Operating Voltages: 1.8V ±5%, 3.0V ±10%, and 2.97 to 5.5V (DS1394: 3.3V ±10%)