Document
Rev.1.2
REAL-TIME CLOCK
S-3511A
S-3511A is a CMOS real-time clock IC, which is designed to transfer or set each data of a clock and calender as requested by a CPU. It provides connection with a CPU via three wires and has an interrupt/alarm feature, allowing the alleviation of software treatment on the side of a host. It also works on lower power with the oscillating circuit operated at a constant voltage. The shipping form is either a die or an 8-pin SSOP ultra compact package.
! Features
!
• Low power consumption
: 0.7 µA typ. (VDD=3.0 V)
• Wide area of operating voltage : 1.7 to 5.5 V
• BCD input/output of year, month, day,
day of a week, hour, minute and second
• CPU interface via three wires •
• Auto calender till the year of 2,099
(automatic leap year arithmetic feature included)
• Built-in power voltage detecting circuit
• Built-in constant voltage circuit
• Built-in flag generating circuit on power on/off
• Built-in alarm interrupter
• St.