ZHCSL89B may 2020 – november 2020 TPS3703
PRODUCTION DATA
The CT pin provides the user the functionality of both high-precision, factory-programmed, reset delay timing options and user-programmable, reset delay timing. The CT pin can be pulled up to VDD through a resistor, have an external capacitor to ground, or can be left unconnected. The configuration of the CT pin is re-evaluated by the device every time the voltage on the SENSE line enters the valid window (VIT-(UV) < VSENSE < VIT+(OV)). The pin evaluation is controlled by an internal state machine that determines which option is connected to the CT pin. The sequence of events takes 450 μs to determine if the CT pin is left unconnected, pulled up through a resistor, or connected to a capacitor. If the CT pin is being pulled up to VDD, then a pull-up resistor is required, 10 kΩ is recommended.