ULTRA-COMPACT SERIAL ALARM REAL TIME CLOCK ICs
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The RS5C316A/B are CMOS type real-time clock ICs which are connected to the CPU via
three signal lines and capable of serial transmission of clock and calendar data to the CPU.
The RS5C316A/B can generate various periodic interrupt clock pulses lasting for long period (one month), further
alarm interrupt can be made by days of the week, hours, and minutes. Driving an oscillation circuit at constant
voltage, the circuit undergoes few voltage fluctuations and consequently realizes low current consumption (0.6µA
at 3V). It also provides an oscillator halt sensing function for application to data validity at power-on and
other occasions. Integrated into an ultra compact and ultra thin 8pin
SSOP (0.65mm pitch), the RS5C316A/B are the optimum choice for equipment
requiring small size and low power consumption.
The RS5C316A and the RS5C316B reads/writes data at falling and rising edge of serial clock respectively. |
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 Time
keeping voltage |
1.6V to 6.0V |
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| Lowest
supply current |
0.6µA TYP. (1.5µA MAX.) at 3V |
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Connection
to the CPU via only three pins: CE, SCLK/SCLK and SIO for addressing and data read/write |
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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 code |
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Periodic
interrupt pulses to the CPU with cycles ranging from one month to 1/1024Hz, with interrupt flags and interrupt
halt |
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| Alarm
interrupt (days of the week, hours, minutes) |
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| Oscillator
halt sensing to judge internal data validity |
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| Second
digit adjustment by ±30 seconds |
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| 12-hour
or 24-hour time display selectable |
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| Automatic
leap year recognition up to the year 2099 |
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| CMOS
logic |
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| Package |
8pin
SSOP (0.65mm pitch) |
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Communication equipment (Multi-function telephone, portable
telephone, PHS, pager) |
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Business machines (Facsimile, portable facsimile) |
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Personal computer (Desktop type, notebook type, word processor, PDA, electronic
notebook, TV games) |
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Audio visual equipment (Portable audio equipment, video camera, camera, digital
camera, remote control equipment) |
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Home use (Rice cooker, microwave range) |
Data Sheet
(PDF) |
Package Info.
(PDF) |
Mark Info.
(PDF) |
Quality Assurance Data
(PDF) |
 RS5C316A/B
EA-035-0208 (297KB) |
SSOP-8 |
to be prepared |
Reliability |
to be prepared |
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| * All PDF files are less than 1MB unless otherwise stated. |
| * If you don't have Adobe Reader, you can download free. |
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Product Catalog
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| Selection guide is available for download in PDF format. |
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Non-promotion / Discontinued Products
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