Description
Maxim DS1391U-33+ Real Time Clock — Battery Backup, Calendar, NV SRAM 10-Pin μSOP
Specifications
Functions Battery Backup, Calendar, NV SRAM
Date Format DW:DM:M:Y
Time Format HH:MM:SS
Bus Type Serial-SPI
Mounting Type Surface Mount
Package Type µSOP
Pin Count 10
Dimensions 3.05 x 3.05 x 0.95mm
Length 3.05mm
Width 3.05mm
Height 0.95mm
Maximum Operating Supply Voltage 5.5 V
Maximum Operating Temperature +85 °C
Minimum Operating Supply Voltage 2.97 V
Minimum Operating Temperature -40 °C
The low-voltage serial-peripheral interface (SPI™) DS1390/DS1391/DS1394 and the low-voltage 3-wire DS1392/DS1393 real-time clocks (RTCs) are clocks/cal- endars that provide hundredths of a second, 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. One programmable time-of-day alarm is provided. A temperature-compensated voltage reference monitors the status of V CC and automatically disables the bus interface and switches to the backup supply if a power failure is detected. On the DS1390, a single open-drain output provides a CPU interrupt or a square wave at one of four selectable frequencies. The DS1391 replaces the SQW/ INT pin with a RST output/ debounced input.
Manufacturer:Maxim
Datasheet:Maxim/DS1390-DS1394datasheet.pdf
