Please show work and explain, thank you! (VDD=5.00 Volts) unit 74S 74LS74AS74ALS
ID: 2248297 • Letter: P
Question
Please show work and explain, thank you!
(VDD=5.00 Volts) unit 74S 74LS74AS74ALS 74F HC HCTAHCAHCT VIL V 2.00 2.00 2.00 2.00 2.00 3.85 2.00 3.85 200 VOL(max) CMOS load | V10.50 | 0.50| 0.50 | 0.50 | 0.50| 01 10.10 VOH(min CMOS load V min) TTL load V2.70 2.70 2.70 2.70 2.70 3.84 3.84 3.80 3.80 IOLImax) CMOS load MA 5. Estimate the "on" resistances of the p-channel and n-chamel output transistors of the 74AHCT00. Rn(on) loL(maxTTL) 6. Determine the RC time constant for each of the following resistor-capacitor combinations: (a) R = 100 , C = 50 pF (c) R-47 , C=47 pF (b) R-4-7k2, C-150 pF (d) R=1k2. C-100 pF 7. Which would you expect to have a bigger effect on the power consumption of a CMOS circuit, a 10% increase in power-supply voltage (VDD) or a 20% increase in internal and load capacitance, C.? Note: the dominant power dissipation (Po) in a CMOS circuit is given as Where, f is the frequency of operation.Explanation / Answer
This is quite a decent question. Although we can solve question easily by data sheet provided.
Question 6
I t is given that:
Vdd=5Volts
Rp(on)=(Vdd-Voh(min TTL))/Ioh(max TTL)
Rn(on )=Vol(max TTL)/Iol(max TTL)
From given data sheet
Voh(min TTL) for AHCT
=3.8V
Ioh(maax TTL)=-8.00mA for AHCT
Putting in above formula we get =(5-3.8)/(8x10-3)
=150 ohms
Now , Rn(on )=Vol(max TTL)/Iol(max TTL)
frm given Sheet for AHCT
Vol(max TTL)=0.44V
Iol(max TTL)=8mA
Putting in above formula ,
Rn(on)=0.44/8x10-3.
=55ohms.
Question 7
Now We know for RC time constant is given as :
T=RC.
Hence ,
a) T=RC
1pF=10-12 F
=(100x50)x10-12 seconds
=5nano-seconds
b)T=(4.7x103)(150x10-12)
=705nano-seconds
c)T=47x47x10-12
=2.209 nano -seconds
d)T=103x100x10-12
=0.1 micro-seconds
Please rate my answer if you like it , If you need any further help I will help you in comment section . But this is the proper solution.