ULTRA-COMPACT HIGH PERFORMANCE SERIAL REAL-TIME CLOCK ICs
Outline
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[This product was discontinued at the end of Jul. 2009.] |
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The RS5C317A/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 RS5C317A/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. The function
of 32kHz clock output and timer counter for watch-dog-timer are also include. 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 a compact and thin 14pin
SSOP (0.65mm pitch), the RS5C317A/B are the optimum choice for equipment
requiring small size and low power consumption.
The RS5C317A and the RS5C317B reads/writes data at falling and rising edge of serial
clock respectively. |
Features
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[This product was discontinued at the end of Jul. 2009.]
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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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| Counter
for timer with internal clock |
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| Oscillator
halt sensing to judge internal data validity |
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| 32kHz
clock output with enable switch |
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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 |
14pin
SSOP (0.65mm pitch) |
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Applications
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[This product was discontinued at the end of Jul. 2009.] |
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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 equip-ment)
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Home use (Rice cooker, microwave range) |
Documents Download
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[This product was discontinued at the end of Jul. 2009.] |
Data Sheet
(PDF) |
Package Info.
(PDF) |
Mark Info.
(PDF) |
Quality Assurance Data
(PDF) |
 RS5C317A/B
EA-036-0208 (318KB) |
SSOP-14 |
to be prepared |
Reliability |
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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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