RS5C373A

The RS5C373A has the following features including A clock counter (hours, minutes, and seconds) and a calendar counter (leap years, years, months days, and days of the week) in BCD codes;Interrupt to the CPU (period of one month to half second, with interrupt flag, interrupt halt function) (/INTRA, /INTRB) ;Two systems of alarm functions (days of the week, hours, and minutes) (/INTRA, /INTRB);Supply voltage detector with selectable thresholds, 2.1 V or 1.6V;Oscillation halt sensing to judge internal data validity;Clock output of 32.768kHz(32.OOOkHz)(output controllable via a register).

The RS5C373A is a CMOS type real-time clock which is connected to the CPU via 2-wire and capable of serial transmission of clock and calendar data to the CPU. The RS5C373A 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.  Since an oscillation circuit is driven at a constant voltage, it undergoes fluctuations of few voltage and consequently offers low current consumption (0.7pA at 3V).  It also provides an oscillator halt sensing function applicable for data validation at power-on and other occasions and 32kHz clock output for an external micro computer.  The product also incorporates a time trimming circuit that adjusts the clock with higher precision by adjusting any errors in crystal oscillator frequencies based on signals from the CPU.  The RS5C373A also incorporates an internal supply voltage detector with high detector threshold accuracy. The threshold voltage level of it can be selected from the two voltage level (2.1 V, 1.6V). The crystal oscillator may be selected between 32.768kHz or 32.OOOkHz types.  Integrated into an ultra compact and ultra thin 8 pin SSOP package, the RS5C373A is the optimum choice for equipment requiring small sized and low power consuming products.

The products listed in this document are intended and designed for use as general electronic components in standard applications (office equipment, computer equipment, measuring instruments, consumer electronic products, amusement equipment etc.). Those customers intending to use a product in an application requiring extreme quality and reliability, for example, in a highly specific application where the failure or misoperation of the product could result in human injury or death (aircraft, spacevehicle, nuclear reactor control system, traffic control system, automotive and transportation equipment, combustion equipment, safety devices, life support system etc.) should first contact us.