A bistable flip-flop circuit for use preferably in monolithic semiconductor integrated circuits having a master flip-flop at the circuit input and a slave output at the circuit output with coupling transistors between the two master and slave flip-flops. The emitters of the transistors coupled through a resistor to the clock pulse input so that the master flip-flop changes state responsive to the rise time of the clock pulse and the slave flip-flop changes state during the fall time of the clock pulse throughout an extended temperature range.