A good PCB layout practice is to keep the analog and digital grounds separate, use a solid ground plane, and keep the power and ground traces as short as possible. Additionally, use a common mode choke or ferrite bead to filter the power supply lines.
The TRSF3232EIPW requires a power-on reset (POR) signal to ensure proper initialization. A capacitor can be connected between the POR pin and VCC to create a power-on reset circuit. The device also requires a clock signal to be applied to the CLK pin before the POR signal is released.
The TRSF3232EIPW can operate with a clock frequency up to 32 kHz. However, the recommended clock frequency is 32.768 kHz, which is a standard crystal oscillator frequency.
The TRSF3232EIPW has a power-down mode that can be enabled by setting the PD pin low. In this mode, the device consumes very low power. However, the device's registers are not retained during power-down mode, so the device must be re-initialized after power-up.
The TRSF3232EIPW is rated for operation over the industrial temperature range of -40°C to 85°C. However, the device's accuracy and stability may be affected at extreme temperatures.
TRSF3232EIPW datasheet
by Texas Instruments
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