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S-35392A Dataheets PDF



Part Number S-35392A
Manufacturers Seiko
Logo Seiko
Description 2-WIRE REAL-TIME CLOCK
Datasheet S-35392A DatasheetS-35392A Datasheet (PDF)

S-35392A www.sii-ic.com © SII Semiconductor Corporation, 2006-2016 2-WIRE REAL-TIME CLOCK Rev.3.2_02 The S-35392A is a CMOS 2-wire real-time clock IC which operates with the very low current consumption in the wide range of operation voltage. The operation voltage is 1.3 V to 5.5 V so that the S-35392A can be used for various power supplies from main supply to backup battery. Due to the 0.45 μA current consumption and wide range of power supply voltage at time keeping, the S-35392A makes the .

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S-35392A www.sii-ic.com © SII Semiconductor Corporation, 2006-2016 2-WIRE REAL-TIME CLOCK Rev.3.2_02 The S-35392A is a CMOS 2-wire real-time clock IC which operates with the very low current consumption in the wide range of operation voltage. The operation voltage is 1.3 V to 5.5 V so that the S-35392A can be used for various power supplies from main supply to backup battery. Due to the 0.45 μA current consumption and wide range of power supply voltage at time keeping, the S-35392A makes the battery life longer. In the system which operates with a backup battery, the included free registers can be used as the function for user's backup memory. Users always can take back the information in the registers which is stored before power-off the main power supply, after the voltage is restored. The S-35392A has the function to correct advance / delay of the clock data speed, in the wide range, which is caused by the crystal oscillation circuit's frequency deviation. Correcting according to the temperature change by combining this function and a temperature sensor, it is possible to make a high precise clock function which is not affected by the ambient temperature.  Features • Low current consumption: 0.45 μA typ. (VDD = 3.0 V, Ta = +25°C) • Constant output of 32.768 kHz clock pulse (Nch open-drain output) • Wide range of operating voltage: 1.3 V to 5.5 V • Built-in clock correction function • Built-in free user register • 2-wire (I2C-bus) CPU interface • Built-in alarm interrupter • Built-in flag generator during detection of low power voltage or at power-on • Auto calendar up to the year 2099, automatic leap year calculation function • Built-in constant voltage circuit • Built-in 32.768 kHz crystal oscillator (built-in Cd, external Cg) • Lead-free (Sn 100%), halogen-free  Applications • Mobile game device • Mobile AV device • Digital still camera • Digital video camera • Electronic power meter • DVD recorder • TV, VCR • Mobile phone, PHS  Package • SNT-8A 1 2-WIRE REAL-TIME CLOCK S-35392A  Block Diagram Rev.3.2_02 XIN XOUT Oscillation circuit Divider, timing generator VDD VSS Clock correction register Status register 1 Status register 2 Free register Low power supply voltage detector Power-on detection circuit Constantvoltage circuit INT1 register INT1 controller Comparator 1 Real-time data register Second Minute Hour Day of the week Day Month Year Comparator 2 INT2 register Shift register INT2 controller Serial interface 32KO INT2 SDA SCL Figure 1 2 Rev.3.2_02 2-WIRE REAL-TIME CLOCK S-35392A  Product Name Structure 1. Product name S-35392A - I8T1 U Environmental code U: Lead-free (Sn 100%), halogen-free Package name (abbreviation) and IC packing specification*1 I8T1: SNT-8A, Tape Product name *1. Refer to the tape drawing. 2. Package Package Name SNT-8A Table 1 Package Drawing Codes Dimension PH008-A-P-SD Tape PH008-A-C-SD Reel PH008-A-R-SD Land PH008-A-L-SD 3 2-WIRE REAL-TIME CLOCK S-35392A Rev.3.2_02  Pin Configuration 1. SNT-8A Top view 18 27 36 45 Figure 2 S-35392A-I8T1U Table 2 List of Pins Pin No. Symbol Description I/O Configuration Pin for constant 1 32KO output of 32.768 Output kHz Nch open-drain output (no protective diode at VDD) 2 XOUT Connection pins 3 XIN for crystal oscillator − − 4 VSS GND pin − − 5 INT2 Output pin for interrupt signal 2 Output Nch open-drain output (no protective diode at VDD) 6 SCL Input pin for serial clock Input CMOS input (no protective diode at VDD) 7 SDA I/O pin for serial data Nch open-drain output Bi-directional (no protective diode at VDD) CMOS input 8 VDD Pin for positive power supply − − 4 Rev.3.2_02 2-WIRE REAL-TIME CLOCK S-35392A  Pin Functions 1. SDA (I/O for serial data) pin This pin is a data input / output pin of I2C-bus interface. This pin inputs / outputs data by synchronizing with a clock pulse from the SCL pin. This pin has CMOS input and Nch open drain output. Generally in use, pull up this pin to the VDD potential via a resistor, and connect it to any other device having open drain or open collector output with wired-OR connection. 2. SCL (input for serial clock) pin This pin is to input a clock pulse for I2C-bus interface. The SDA pin inputs / outputs data by synchronizing with the clock pulse. 3. XIN, XOUT (crystal oscillator connect) pins Connect a crystal oscillator between XIN and XOUT. 4. 32KO (output of 32.768 kHz) pin This is an output pin for 32.768 kHz. This pin constantly outputs a clock pulse after power-on. 5. INT2 (output for interrupt signal 2) pin This pin outputs a signal of interrupt, or a clock pulse. By using the status register 2, users can select either of; alarm interrupt, output of user-set frequency, or minute-periodical interrupt 1. This pin has Nch open drain output. 6. VDD (positive power supply) pin Connect this VDD pin with a positive power supply. Regarding the values of voltage to be applied, refer to " Recommended Operation Co.


CS-800 S-35392A S-35399A02


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