10/14/2023 0 Comments What is usb serial controller dNormally, the maximum slew rate allowed is 30V/µsec. The RS232 standard maintains a minimum slew rate with slow rise and fall time to reduce the cross-talk between neighbouring signals. The change of input voltage determines the rate at which the RS232 driver responds. The voltage from -3V to +3V is considered as an indeterminate state. Whereas the control voltage signals use negative logic, i.e., logic ‘1’ indicates -3 to -25 volts and logic ‘0’ indicates +3V to +25V. The signal voltage between +3V to +25V represents logic ‘1’ and the signal voltages between -3V to -25V represents logic ‘0’.
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