S35390A Datasheet PDF - Seiko Instruments 2-Wire Real Time Clock Specs

S35390A - 2-Wire Real Time Clock

This page provides the datasheet information for the S35390A, a member of the S35-390 2-Wire Real Time Clock family.

Datasheet Summary

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.

Datasheet Details

Part number	S35390A
Manufacturer	Seiko Instruments
File Size	519.86 KB
Description	2-Wire Real Time Clock
Datasheet	S35390A Datasheet
Additional preview pages of the S35390A datasheet.

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Full PDF Text Transcription

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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.

Published: Apr 4, 2006 |