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NPC Real Time Clock RTC products address basic timekeeping for analog display watches and clocks, and also with industrial control applications mating with microcontrollers. NPC oscillator technology provides excellent accuracy

*Clocks *Watches *Portables (PDA iPOD) *Industrial Control *White Goods

Real Time Clock
Device	Features		Supply Voltage (V)	Package	Pins	file (kb)
NR8576 series	Real-time clock module. Crystal oscillator element built-in for adjustment free use, serial interface, 32.768kHz and 1Hz output selectable. Several accuracy versions		2.5 to 5.5	SOP	14 18	86
SM8577B	Real-time clock IC. Serial interface, 32.768KHz and 1Hz output selectable		2.5 to 5.5	SOP	8	78
SM8578BV	Real-time clock IC. Serial interface, 2.768KHz and 1Hz output selectable, Day (day of the month), weekday (Sunday to Saturday), hour & minute alarm interrupt function, Low current consumption		1.6 to 5.5	VSOP	8	78
SM8580	Real-time clock IC. High speed 4-bit parallel interface, Day (day of the month), weekday (Sunday to Saturday), hour & minute alarm interrupt		1.6 to 5.5	SSOP	24	162
Y2100K	Year 2100 "Y2100K" Notice regarding Real Time Clock products
Timepiece / Radio Controlled Clock Receiver
Device	Features		Supply Voltage (V)	Package	Pins	file (kb)
SM9501A SM9501B	BiCMOS radio controlled clock receiver IC. Includes analog switch for tuning antenna with capacitors.		2.4 to 3.6 (A version)	VSOP chip	16
SM9501A SM9501B			4.5 to 5.5 (B version)	VSOP chip	16
SM9502A	BiCMOS radio controlled clock receiver IC. Includes analog switch for tuning antenna with capacitors.		1.2 to 2.8	SSOP chip	16
Time piece / Clock
Device	Features		Supply Voltage (V)	Package	Pins	file (kb)
CF5705	Analog Watch IC CMOS	-1.2 to -2.0 Volt operation. Low Current consumption (150nA typ)	1.2 to 2.8	chip
CF5760		-1.2 to -2.0 Volt operation. various alarm & motor outputs	1.2 to 2.8	chip
CF5761		-1.2 to -3.6 Volt operation. Alarm and Snooze function	1.2 to 2.8	chip

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