Logic Circuit Equivalent Of 555 S-R Latch (NE555)

This circuit is equivalent to the circuit "555 Timer Set-Reset Latch" when the mode/configuration switch (Smode/Scfg) is open and the model used for the component 555 Timer behaves like Signetics' NE555 (NE555, et. al.). For Free Subscription version of Multisim Live, the only available model is IDEAL_TIMER which behaves like NS LM555. The circuit's input and output pins are: nRSTMCLR = Active low Master CLEAR, 555 Timer RESET input. THRESET = Active high RESET, 555 Timer THRESHOLD input. nTRSET = Active low SET, 555 Timer TRIGGER input. Qout = Latch push-pull output, 555 Timer main OUTPUT. Qdchg = Latch open-collector output, 555 Timer DISCHARGE output. Qout (555 Timer OUTPUT) is derived by complementing the output of the NAND gate using an inverter. Qdchg (555 Timer DISCHARGE) is derived by complementing the output of the NAND gate using a BJT inverter.