PT7C43190 Datasheet, PDF (1/32 Pages) Pericom Semiconductor Corporation – Real-time Clock Module

PT7C43190
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Real-time Clock Module
Features
 Low current consumption: 0.3µA typ. (V_DD=3.0V,
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.
Function Table
Item
Function
1 Oscillator Source
Crystal^*
2 Time
Time
display
12-hour
24-hour
Interrup Alarm interrupt pin output
3
t
Timer interrupt output
Programmable square wave output
4
(Hz)
Commu 3-wire bus
5
nication Burst mode
IC test mode
6 Control ^{Power-on detector}
Power supply voltage
detector
7 Clock calibration
80 Free register access
PT7C43190
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2
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1Hz,2Hz,4Hz
8Hz,16Hz
32kHz
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Applications
 Mobile game device
 Digital still camera
 Digital video camera
 Electronic power meter
 DVD recorder
 TV, VCR
 Mobile phone, PHS
Pin Configuration
PT7C43190
1 _INT
VDD 8
2 XOUT
SIO 7
3 XIN
SCK ⁶
4 _VSS
CS ⁵
SOIC-8
TSSOP-8
DFN2*3
2015-09-0015
PT0274-7 10/16/15
1