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S35390A - 2-Wire Real Time Clock

Download the S35390A datasheet PDF. This datasheet also covers the S35-390 variant, as both devices belong to the same 2-wire real time clock family and are provided as variant models within a single manufacturer datasheet.

Description

Table 1 Pin No.

Symbol Description Interrupt 1 signal output pin Depending on the mode set by INT1 register_1 and the status register, it outputs low or a clock when the time is reached.

It is disabled by rewriting the status register.

Features

  • Low current consumption: 0.25 µA typ. (VDD = 3.0 V, Ta = 25°C) Wide operating voltage range: 1.3 to 5.5 V Minimum time keeping operation voltage: 1.1 V Built-in clock adjustment function Built-in free user register 2-wire (I2C-BUS).
  • 1 CPU interface Built-in alarm interrupter Built-in flag generator at power down or power on Auto calendar up to the year 2099, automatic leap.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (S35-390-A.pdf) that lists specifications for multiple related part numbers.

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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.

View original datasheet text
Rev.1.2_00 2-WIRE REAL-TIME CLOCK S-35390A The S-35390A is a low-current-consumption 2-wire CMOS real-time clock IC that features a wide operating voltage range (1.3 V to 5.5 V) and can be driven on a variety of supply voltages, from a main supply to a backup supply. The time keeping current consumption of 0.25 µA and minimum time keeping operation voltage of 1.1 V enable greatly increased battery duration. In a system that operates on a backup battery, the free register incorporated in the real-time clock can be used for the user backup memory function. The user register can hold data on a supply voltage as low as 1.2 V (min.), so the data stored in the register before the main power supply was cut can be called any time after the voltage is restored.
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