RS5C372A

Product Summary

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. The RS5C372A can generate various periodic interrupt clock pulses lasting for long period (one month), and alarm interrupt can be made by days of the week, hours, and minutes by two incorporated systems. The applications of the RS5C372A are 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).

Parametrics

RS5C372A absolute maximum ratings: (1)Supply Voltage:–0.3 to +7.0V; (2)Input Voltage:–0.3 to +7.0V; (3)Output Voltage:–0.3 to +7.0V; (4)Output Voltage:–0.3 to +12V; (5)Power Dissipation:300 mW; (6)Operating Temperature:–40 to +85℃; (7)Storage Temperature:–55 to +125℃.

Features

RS5C372A features: (1)Connected to the CPU via only 2-wires (I2C bus Interface, MAX.400kHz, address 7bit); (2)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 ; (3)Interrupt to the CPU (period of one month to one second, interrupt flag, interrupt halt function) (INTRA, INTRB); (4)Two systems of alarm functions (days of the week, hours, and minutes) (INTRA, INTRB); (5)Oscillation halt sensing to judge internal data validity; (6)Clock output of 32.768kHz (32.000kHz) (output controllable via a register)(Nch. open drain output); (7)Second digit adjustment by ±30 seconds; (8)Automatic leap year recognition up to the year 2099; (9)12-hour or 24-hour time display selectable; (10)Oscillation stabilizing capacity (CG, CD) incorporated; (11)High precision time trimming circuit; (12)Oscillator of 32.768kHz or 32.000kHz may be used; (13)CMOS logic; (14)Package: 8pin SSOP.

Diagrams