Repeat Problem 8-42 with the following changes in the circuit:

■ Each TTL IC is replaced with its 74LS equivalent.

■ The 4001B is replaced with a 74HCT02.

Data from Problem 8-42

Figure 8-66 is a logic circuit that was poorly designed. It contains at least eight instances where the characteristics of the ICs have not been properly taken into account. Find as many of these as you can.

Figure 8-66

Transcribed Image Text:

nnn +5V J FCCLK CLR From 74S1 12 outputs Not used 74S112 A ▶B -A₂ OS LODA₁ Q tp = 1 ms. 4001B J B CLK KCLR +5 V Power supply +5 V 150 mA μF 10 HE HI 74121 To A B 90 ww F 74S112 C >CLK KCLR 7486 D LOCLK KCLR 7400 74S112 J >CLK CLR E 7400 J -OCLK F KCLR PAA