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PT7C43190LEX

Description
Real-time Clock Module
File Size2MB,32 Pages
ManufacturerPericom Semiconductor Corporation (Diodes Incorporated)
Websitehttps://www.diodes.com/
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PT7C43190LEX Overview

Real-time Clock Module

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PT7C43190
Real-time Clock Module
Features
Low current consumption: 0.3µ typ. (V
DD
=3.0V,
A
T
A
= 25°
C)
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
3-wire (micro wire) 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
Package: SOIC-8L, TSSOP-8L, and TDFN2x3-8L
Description
The PT7C43190 is a CMOS 3-wire 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
Function Table
Item
1
2
3
Function
Oscillator Source
Time
Interrup
t
Time
display
Crystal
*
12-hour
24-hour
PT7C43190
2
1Hz,2Hz,4Hz
8Hz,16Hz
32kHz
3
2
Alarm interrupt pin output
Timer interrupt output
Mobile game device
Digital still camera
Digital video camera
Electronic power meter
DVD recorder
TV, VCR
Mobile phone, PHS
4
Programmable square wave output
(Hz)
Commu
nication
3-wire bus
Burst mode
IC test mode
Power-on detector
Power supply voltage
detector
Pin Configuration
PT7C43190
1
5
INT
XOUT
XIN
VDD
8
SIO
7
6
Control
4
SCK
CS
6
7
80
Clock calibration
Free register access
VSS
5
SOIC-8
TSSOP-8
DFN2*3
2015-09-0015
1
PT0274-7
10/16/15
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