PT7C4307 2 Real-time Clock Module (I C Bus) Features Description Table 1. Basic functions of PT7C4307 Item Function PT7C4307 Source: Crystal: 32.768kHz 1 Oscillator Oscillator enable/disable Oscillator fail detect - 12-hour Time display 2 Time 24-hour Century bit - 3 Alarm interrupt - 4 Programmable square wave output (Hz) 1, 4.096k, 8.192k, 32.768k 5 RAM 56 8 6 Battery backup Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See PT7C4307 Pin Configuration PT7C4307 1 X1 VCC 8 7 2 X2 SQW/OUT 3 SCL 6 VBAT 4 5 GND SDA DIP-8 SOIC-8 Pin Description Pin no. Pin Type Description 1 X1 I Oscillator Circuit Input. Together with X2, 32.768kHz crystal is connected between them. Oscillator Circuit Output. Together with X1, 32.768kHz crystal is connected between them. 2 X2 O When 32.768kHz external input, X2 must be float. 2 6 SCL I Serial Clock Input. SCL is used to synchronize data movement on the I C serial interface. Serial Data Input/Output. SDA is the input/output pin for the 2-wire serial interface. The 5 SDA I/O SDA pin is open-drain output and requires an external pull-up resistor. Square Wave/Output Driver. Open drain. Four frequencies selectable: 32.768k, 8.192k, 7 SQW/OUT O 4.096k, 1Hz when SQWE bit is set to 1. 8 VCC P Power. Primary power for PT7C4307. 3 VBAT P +3V Battery Power. 4 GND P Ground. PT7C4307 www.diodes.com August 2020 Document Number DS43088 Rev 1-2 2 Diodes Incorporated