By admin | Published: 11/20/2009
TTL RS232 driver circuit.
TTL driver circuit consists of 2 transistors and a few other passive components, a negative voltage for RS232 logic generated by the capacitor C7.
TTL to RS232 driver circuit and a variable voltage output driver has a parallel termination impedance to match cable and TTL driver circuit, and provides the best waveform.
When driving [...]
TTL RS232 driver circuit and Protect the PC from direct connection to hazardous voltages