PT7C4363B 2 Real-time Clock Module (I C Bus) Features Description Drop-In Replacement for PT7C4363 The PT7C4363B serial real-time clock is a low-power Supports High-ESR Crystals Up To 100k clock/calendar with a programmable square-wave output. Using external 32.768kHz quartz crystal 2 Supports I C-Bus s high speed mode (400 kHz) Address and data are transferred serially via a 2-wire Includes time (Hour/Minute/Second) and calendar bidirectional bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. (Year/Month/Date/Day) counter functions (BCD code) Programmable square wave output signal The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for Oscillator stop flag leap year. The clock operates in the 24-hour format indicator. Low backup current: typ. 400nA at V =3.0V and DD T =25C A Table 1 shows the basic functions of PT7C4363B. More Operating range: 1.3V to 5.5V details are shown in section: overview of functions. Table 1. Basic functions of PT7C4363B Item Function PT7C4363B 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 Alarm interrupt 3 Interrupt Timer interrupt output 4 Programmable square wave output (Hz) 1, 32, 1.024k, 32.768k 2 2-wire I C bus Communicati 5 3-wire bus - on Burst mode - Write protection - 6 Control External clock test mode Power-on reset override PT7C4363B www.diodes.com January 2018 Document Number DS39946 Rev 2-1 Diodes Incorporated 1 PT7C4363B Pin Configuration PT7C4363B 1 X1 VCC 8 2 X2 SQW 7 3 INT SCL 6 4 5 GND SDA SOIC-8, TDFN-8 Pin Description Pin 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. PT7C4363B www.diodes.com January 2018 Document Number DS39946 Rev 2-1 Diodes Incorporated 2