Refer to the IC counter circuit in Figure 7-107(a).

(a) Draw the timing diagram for outputs QD QC QB QA.

(b) What is the counter’s modulus?

(c) What is the count sequence? Does it count up or down?

(d) Can we produce the same modulus with a 74HC190? Can we produce the same count sequence with a 74HC190

Figure 7-107

Transcribed Image Text:

CLK 0 1 того 0 1 74HC191 CLK CTEN D/U LOAD DCBA (a) RCO Max Min QD QC QB QA QD QC QB QA CLK 0 START 0 0 0 0 74HC190 CLK CTEN D/Ū LOAD DCBA (b) RCO Max /Min QD QC QB QA QD QC QB QA