PT7C43390ZEE datasheet, PDF - EEWORLD Datasheet

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PT7C43390ZEE: DescriptionReal-time Clock Module; File Size2MB，38 Pages; ManufacturerPericom Semiconductor Corporation (Diodes Incorporated); Websitehttps://www.diodes.com/

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PT7C43390ZEE Overview

Real-time Clock Module

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PT7C43390/43390C

Real-time Clock Module

Features



Low current consumption: 0.3µ typ. (V

=3.0V,

= 25°



Wide operating voltage range: 1.35 to 5.5 V



Minimum time keeping operation voltage: 1.25 V



Built-in clock adjustment function



Built-in free user register



2-wire (I

C-bus)

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

year calculation function



Built-in constant voltage circuit



Built-in 32 kHz crystal oscillator circuit



Built-in 32 kHz crystal for PT7C43390C



Package: SOIC-8L, TSSOP-8L, and TDFN2x3-8L

for PT7C43390; TDFN4x4-8L for PT7C43390C

Description

The PT7C43390 is a CMOS I

C-bus real-time clock IC,

which operates with the very low current consumption

and in the wide range of operation voltage. The

operation voltage is 1.35 V to 5.5 V so that the RTC can

be used for various power supplies from main supply to

backup battery. 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 IC has the function to correct advance / delay of the

clock data speed, in the wide range, which is caused by

the 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.

Applications



Mobile game device, mobile phone

Industrial control

Electronic power meter

DVD recorder

Car navigation

IP Camera, DVR, NVR

Function Table

Item

Oscillator

Time

Interrupt

Function

Source

Time display

Alarm interrupt pin output

Timer interrupt output

Crystal

12-hour

24-hour

PT7C43390

External crystal



2



1Hz,2Hz,4Hz

8Hz,16Hz

32kHz



PT0280-8

PT7C43390C

Integral crystal



2



1Hz,2Hz,4Hz

8Hz,16Hz

32kHz



12/11/15

Programmable square wave output (Hz)

2-wire I

C bus

Burst mode

IC test mode

Power-on detector

Power supply voltage detector

Communication

Control

Clock calibration

Free register access

2015-12-0001

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