Time exists everywhere around your life, not only in watches and clocks but also in large systems, all of which require both high precision and low power consumption. Seiko NPC has long cultivated IC technologies that fully satify such requirements.

Timepiece Products

Radio Controlled Clock

Device
Features
Supply voltage
[V]
Current consumption
[µA]
Package
Detasheet
SM9501A Include analog switch for antennatuning capacitors change 2.4 to 3.6 55(3V) VSOP-16-051044-1
Chip form
PDF

Real Time Clock

*Link to real time clock ICs ( for Crystal oscillator products)

Device
Features
Supply voltage
[V]
Current consumption
[µA]
Package
Detasheet
NR8576 Series Crystal oscillator element built-in
Serial interface
2.5 to 5.5*1 1.0 typ*2 SOP-14-101050-1 PDF
SM8578B 3-wire serial interface
Alarm and timer interrupt functions
1.6 to 5.5*1 0.5 typ*2 VSOP-8-031044-1 PDF
SM8580A Temperature sensor built-in
4-bit parallel interface
Alarm interrupt function
1.6 to 5.5*1 0.6 typ*2 SSOP-24-100054-1 PDF

Clock / Watch

Device
Features
Supply voltage
[V]
Current consumption
[µA]
Package
Detasheet
CF5705 Series Analog watch IC -1.2 to -3.6 0.25(-1.55V)
1.0(-2.8V)
Chip form PDF
CF5760 Series Analog clock IC
Alarm function
1.2 to 2.0 1.2(1.5V) Chip form PDF
CF5761 Series Analog clock IC
Alarm function
Snooze function
1.2 to 3.6 0.9(1.5V)
1.3(3.0V)
Chip form PDF

 

*1: It is specified only for clock and calendar operating voltage. Operating voltage for CPU access is specified by the other specification.
*2: It is specified for only when clock and calendar circuit operating. In this case accessing to CPU is not possible.

Custom IC Development