SM8578BV
OVERVIEW
The SM8578BV is a serial interface, real-time clock IC that uses a 32.768 k Hz crystal oscillator for its reference timing. It prises second-counter to year-counter clock and calendar circuits that feature automatic leap-year adjustment, alarm and timer interrupt functions, as well as oscillator stop, timer reloading, and other detection functions. Data is transferred to and from an external controller using a 3-wire serial interface. It is available in pact 8-pin VSOP packages, making it ideal for use in all types of portable, hand-held equipment.
FEATURES
PINOUT
(Top view)
1.6 to 5.5V wide operating voltage range 0.5µA (typ.) current consumption (VDD = 3.0V, CE = Low) 3-wire serial interface control Day, day-of-week, hour, and minute alarm interrupt function 1/4096 seconds to 255 minutes presettable interval timer interrupt function Time update detection function Abnormal oscillation detection function Automatic leap-year adjustment function...
