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PT7C43390WEX Datasheet(PDF) 1 Page - Pericom Semiconductor Corporation

Part # PT7C43390WEX
Description  Real-time Clock Module
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Manufacturer  PERICOM [Pericom Semiconductor Corporation]
Direct Link  http://www.pericom.com
Logo PERICOM - Pericom Semiconductor Corporation

PT7C43390WEX Datasheet(HTML) 1 Page - Pericom Semiconductor Corporation

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Real-time Clock Module
2015-12-0001
PT0280-8
12/11/15
1
PT7C43390/43390C
Features
 Low current consumption: 0.3µA typ. (V
DD=3.0V,
TA = 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
 2-wire (I2C-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
Applications
 Mobile game device, mobile phone
 Industrial control
 Electronic power meter
 DVD recorder
 Car navigation
 IP Camera, DVR, NVR
Description
The PT7C43390 is a CMOS I
2C-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.
Function Table
Item
Function
PT7C43390
PT7C43390C
1
Oscillator
Source
Crystal
*
External crystal
Integral crystal
2
Time
Time display
12-hour
24-hour
3
Interrupt
Alarm interrupt pin output
2
2
Timer interrupt output
4
Programmable square wave output (Hz)
1Hz,2Hz,4Hz
8Hz,16Hz
32kHz
1Hz,2Hz,4Hz
8Hz,16Hz
32kHz
5
Communication
2-wire I
2C bus
Burst mode
6
Control
IC test mode
Power-on detector
Power supply voltage detector
7
Clock calibration
80
Free register access


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