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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
While examining the schematic for a piece of equipment, a technician or an engineer will often come across an IC that is unfamiliar. In such cases, it is often necessary to consult the manufacturer’s data sheets for specifications on the device. Research the data sheet for the 74AS194 bidirectional universal shift register to answer the following questions:
(a) Is theÂ
 input asynchronous or synchronous?
(b) True or false: When CLK is LOW, the S0and S1inputs have no effect on the register.
(c) Assume the following conditions:
QA QB QC QD = 1 0 1 1
A B C D = 0 1 1 0
= 1
SR SER = 0
SL SER = 1
If S0= 0 and S1= 1, determine the register outputs after one CLK pulse. After two CLK pulses. After three. After four.
(d) Use the same conditions except S0=1 and S1=0 and repeat part (c).
(e) Repeat part (c) with S0= 1 and S1= 1.
(f) Repeat part (c) with S0= 0 and S1= 0.
(g) Use the same conditions as in part (c), except assume that QAis connected to SL SER. What will be the register outputs after four CLK pulses?
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