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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: 0.5?A TYP. (0.9?A MAX.) : 3V (25?C)

(1.0?A 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)