PT7C4311

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Real-time Clock Module (I2C Bus) Features

Description



Support I2C-Bus (High speed mode 400kHz)

The PT7C4311 serial real-time clock is a low-power



Includes time (Hour/Minute/Second) and calendar

clock/calendar with a programmable square-wave output.

(Century/Year/Month/Date/Day) counter functions

Address and data are transferred serially via a 2-wire



Year 2000 compliant

bidirectional bus. The clock/calendar provides seconds,



Automatic switch-over and deselect circuitry

minutes, hours, day, date, month, and year information.



Time keeping voltage: 1.2V to 5.5V

The date at the end of the month is automatically



Software clock calibration

adjusted for months with fewer than 31 days, including



56 bytes of general purpose RAM



Ultra-low battery supply current of 0.3A



Low operating current of 70A



Battery or super cap back-up



Operating temperature: -40°C to 85°C



Automatic leap year compensation



Special software programmable output

corrections for leap year. The clock operates in the 24hour format indicator. Table 1 shows the basic functions of PT7C4311. More details are shown in section: overview of functions.

Pin Configuration

Pin Description Pin no.

Pin

Type

Description Oscillator Circuit Input. Together with X1, 32.768kHz crystal is connected between them. Or 1 X1 I external clock input. 2 X2 O Oscillator Circuit Output. Together with X1, 32.768kHz crystal is connected between them. Battery Supply Voltage. When VCC>VSO1, VCC will power the IC. While VCCVSO1, VCC will power the IC. While VCC