DS1374U-33+ datasheet by Maxim Integrated Products

DS1374U-33+ Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the DS1374U-33+?
  The recommended power-up sequence is to apply VCC first, followed by VBAT. This ensures that the internal registers are properly initialized.
• How do I ensure that the oscillator starts reliably?
  To ensure reliable oscillator startup, a 1-10 kΩ resistor should be connected between the X1 pin and ground, and a 10-22 pF capacitor should be connected between the X2 pin and ground.
• What is the purpose of the RST pin, and how should it be used?
  The RST pin is an active-low reset input that resets the device when pulled low. It should be connected to a 1-10 kΩ pull-up resistor to VCC, and can be driven low by an external reset signal or a power-on reset circuit.
• How do I configure the SQW/OUT pin for a 1 Hz or 4 kHz output?
  To configure the SQW/OUT pin for a 1 Hz or 4 kHz output, set the SQWE bit in the Control Register (address 0Eh) to 1. Then, set the RS0 and RS1 bits in the Control Register to select the desired frequency.
• What is the maximum capacitance that can be connected to the X1 and X2 pins?
  The maximum capacitance that can be connected to the X1 and X2 pins is 22 pF. Exceeding this value may affect the oscillator's reliability and accuracy.