RS4C411 Real Time Clock With 56-Byte NVRAM
■The RS4C411 is a low-power serial real-time clock (RTC) with 56 bytes of NVRAM. A built-in 32.768 kHz oscillator (external crystal controlled) and the first 8 bytes of the RAM are used for the clock/calendar function and are configured in binary-coded decimal (BCD) format. Addresses and data are transferred serially via a two-line bidirectional bus. The built-in address register is incremented automatically after each write or read data byte.
■The RS4C411 clock has a built-in power sense circuit which detects power failures and automatically switches to the battery supply during power failures. The energy needed to sustain the RAM and clock operations can be supplied from a small lithium coin cell.
■Typical data retention time is in excess of 5 years with a 50 mA/h, 3 V lithium cell.
●Features
■Counters for seconds, minutes, hours, day, date, month, years and century
■32 kHz crystal oscillator integrating load capacitance (12.5 pF) providing exceptional oscillator stability and high crystal series
■Serial interface supports I2C bus (400 kHz protocol)
■Ultra-low battery supply current of 0.4 μA (typ. at 3 V)
■2.0 to 5.5 V clock operating voltage
■Automatic switchover and deselect circuitry
■56 bytes of general purpose RAM
■Software clock calibration to compensate crystal deviation due to temperature
■Automatic leap year compensation
■Operating temperature of –40 to 85°C
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RS4C411 、 RS4C411WE 、 RS4C411UE 、 RS4C411ZAE 、 RS4C411SE |
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Real Time Clock 、 low-power serial real-time clock 、 low-power serial RTC 、 clock |
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Datasheet |
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Please see the document for details |
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SOP14;SOP8;MSOP8;DNF8;TDNF-8;SOP-8;MSOP-8;SOP-14;DFN2X2-8L |
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English Chinese Chinese and English Japanese |
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2023/7/28 |
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V2.2 |
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RSM-DS-R-0045 |
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1.6 MB |
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