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 the C̅L̅R̅ input asynchronous or synchronous?

(b) True or false: When CLK is LOW, the S₀ and S₁ inputs have no effect on the register.

(c) Assume the following conditions:

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 Q_A is connected to SL SER. What will be the register outputs after four CLK pulses?

Transcribed Image Text:

QA QB Qc QD = 1 0 1 1 A B C D 0 1 1 0 CLR = 1 SR SER=0 SL SER=1