PT7C4563 2 Real-time Clock Module (I C Bus) Features Description The PT7C4563 serial real-time clock is a low-power Using external 32.768kHz quartz crystal 2 clock/calendar with a programmable square-wave output. Supports I C-Bus s high speed mode (400 kHz) Includes time (Hour/Minute/Second) and calendar Address and data are transferred serially via a 2-wire (Year/Month/Date/Day) counter functions (BCD bidirectional bus. The clock/calendar provides seconds, code) minutes, hours, day, date, month, and year information. Programmable square wave output signal The date at the end of the month is automatically Oscillator stop flag adjusted for months with fewer than 31 days, including Low backup current: typ. 400nA at V =3.0V and DD corrections for leap year. The clock operates in the 24- T =25C A hour format indicator. Operating range: 1.3V to 5.5V Table 1 shows the basic functions of PT7C4563. More details are shown in section: overview of functions. Table 1. Basic functions of PT7C4563 Item Function PT7C4563 Source: Crystal: 32.768kHz 1 Oscillator Oscillator enable/disable - Oscillator fail detect 12-hour - Time display 24-hour 2 Time Century bit Time count chain enable/disable - 3 Interrupt Alarm interrupt 4 Programmable square wave output (Hz) 1, 32, 1.024k, 32.768k 2 Communicati 2-wire I C bus 5 on Burst mode - All trademarks are property of their respective owners. www.diodes.com 11/10/2016 2016-10-0003 PT0333-5 1 PT7C4563 Pin Configuration PT7C4363 8 1 X1 VCC 2 X2 SQW 7 6 3 INT SCL 5 4 GND SDA DIP-8 SOIC-8, MSOP-8, TSSOP-8, TDFN-8 SOIC-8 TSSOP-8 Pin Description Pin no. Pin Type Description 1 X1 I Oscillator Circuit Input. Together with X2, 32.768kHz crystal is connected between them. 2 X2 O Oscillator Circuit Output. Together with X1, 32.768kHz crystal is connected between them. INT 3 O Interrupt Output. Open drain, active low. 4 GND P Ground. Serial Data Input/Output. SDA is the input/output pin for the 2-wire serial interface. The SDA 5 SDA I/O pin is open-drain output and requires an external pull-up resistor. 2 6 SCL I Serial Clock Input. SCL is used to synchronize data movement on the I C serial interface. Clock Output. Open drain. Four frequencies selectable: 32.768k, 1.024k, 32, 1Hz when SQWE 7 SQW O bit is set to 1. 8 VCC P Power. All trademarks are property of their respective owners. www.diodes.com 11/10/2016 2016-10-0003 PT0333-5 2