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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.

General 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.

Key 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.

Full PDF Text Transcription for S35390A (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for S35390A. For precise diagrams, and layout, please refer to the original PDF.

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...

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l-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 tim

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