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V3021 - Ultra Low Power 1-Bit 32-kHz RTC

General Description

The V3021 is a low power CMOS real time clock.

Data is transmitted serially as 4 address bits and 8 data bits, over one line of a standard parallel data bus.

Key Features

  •  Supply current typically 800 nA at 3V  50 ns access time with 50 pF load capacitance  Fully operational from 2.0V to 5.5V  No busy states or danger of a clock update while accessing  Serial communication on one line of a standard parallel data bus or over a conventional 3 wire serial interface  Interface compatible with both Intel and Motorola  Seconds, minutes, hours, day of month, month, year, week day and week number in BCD format  Leap year and week number correction  Time set lock.

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Other Datasheets by EM Microelectronic (Swatch Group)

Part Number Description
V3020 Ultra Low Power 1-Bit 32-kHz RTC
V3023 Very Low Power 8-Bit 32-kHz RTC Module
V3025 Very Low Power 8-Bit 32-kHz RTC

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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DATASHEET Ɩ EM3021 Ultra Low Power 1-Bit 32 kHz RTC Description The V3021 is a low power CMOS real time clock. Data is transmitted serially as 4 address bits and 8 data bits, over one line of a standard parallel data bus. The device is accessed by chip select ( CS ) with read and write control timing provided by either RD and WR pulse (Intel CPU) or DS with advanced R/ W (Motorola CPU). Data can also be transmitted over a conventional 3 wire serial interface having CLK, data I/O and strobe. The V3021 has no busy states and there is no danger of a clock update while accessing. Supply current is typically 800 nA at VDD = 3.0V. Battery operation is supported by complete functionality down to 2.0V. The oscillator is typically 0.3 ppm/V.