PT7C4337A/4337AC 2 Real-time Clock Module (I C Bus) Features Description Table 1. Basic functions of PT7C4337A/4337AC Item Function PT7C4337A PT7C4337AC Source Crystal(32.768KHz) External crystal Integrated Crystal 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 output 2 2 4 Programmable square wave output (Hz) 1, 4.096k, 8.192k, 32.768k 1, 4.096k, 8.192k, 32.768k 2 5 Communication 2-wire I C bus 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 PT7C4337A/4337AC Pin Configuration PT7C4337A PT7C4337AC 1 X1 VCC 8 1 SCL SDA 16 2 X2 SQW/INTB 7 2 SQW/INTB GND 15 6 14 3 INTA SCL 3 VCC INTA 5 13 4 4 SDA NC GND NC 5 NC NC 12 SOIC-8, MSOP-8, TDFN-8, TSSOP-8 11 6 NC NC 7 NC 10 NC 8 9 NC NC SOIC-16 Pin Description 4337AC 4337A SOIC Pin Type Description Pin Pin Oscillator Circuit Input. Together with X1, 32.768kHz crystal is connected 1 / X1 I between them. Or external clock input. Oscillator Circuit Output. Together with X1, 32.768kHz crystal is connected 2 / X2 O between them. When 32.768kHz external input, X2 must be float. 2 Serial Clock Input. SCL is used to synchronize data movement on the I C 6 1 SCL I serial interface. Serial Data Input/Output. SDA is the input/output pin for the 2-wire serial 5 16 SDA I/O interface. The SDA pin is open-drain output and requires an external pull-up resistor. Interrupt Output. When enabled, INTA is asserted low when the time INTA matches the values set in the alarm registers. This pin is an open-drain output 3 14 O and requires an external pull up resistor. Square-Wave/Interrupt Output. Programmable square-wave or interrupt SQW/INTB 7 2 O output signal. It is an open-drain output and requires an external pull up resistor. 8 3 VCC P Power. Primary power for PT7C4337A. 4 15 GND P Ground. No Connect. These pins are not connected internally, but must be grounded for / 5-13 NC proper operation. PT7C4337A/4337AC www.diodes.com August 2020 Document Number DS43090 Rev 1-2 2 Diodes Incorporated