OUTLINE

The RS5C372A is a CMOS type real-time clock which is connected to the CPU via 2-wires and capable of serial transmission of clock and calendar data to the CPU.

FEATURES

• Time keeping voltage: 1.45V to 6.0V

• Lowest supply current: 0.5µA TYP. (0.9µA MAX.) : 3V (25˚C)

(1.0µA MAX.) : 3V (–40 to +85˚C)

• Connected to the CPU via only 2-wires

(I2C bus Interface, MAX.400kHz, address 7bit)

• A clock counter (counting hours, minutes, and seconds)

and a calendar counter

(counting leap years, years,

months, days, and days of the week) in BCD codes

• Interrupt to the CPU (period of one month to one second,

interrupt flag, interrupt halt function) (INTRA, INTRB)

• Two systems of alarm functions

(days of the week, hours, and minutes) (INTRA, INTRB)

• Oscillation halt sensing to judge internal data validity

• Clock output of 32.768kHz (32.000kHz)

(output controllable via a register) ... (Nch. open drain output)

• Second digit adjustment by ±30 seconds

• Automatic leap year recognition up to the year 2099

• 12-hour or 24-hour time display selectable

• Oscillation stabilizing capacity (CG, CD) incorporated

• High precision time trimming circuit

• Oscillator of 32.768kHz or 32.000kHz may be used

• CMOS logic

• Package: 8pin SSOP

APPLICATIONS

• Communication devices (multi function phone, portable phone, PHS or pager)

• OA devices (fax, portable fax)

• Computer (desk-top and mobile PC,

portable word-processor, PDA, electric note or video game)

• AV components (portable audio unit, video camera,camera,

digital camera or remote controller)

• Home appliances (rice cooker, electric oven)

• Other (car navigation system, multi-function watch)