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74HC166 Datasheet(PDF) 4 Page - NXP Semiconductors |
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74HC166 Datasheet(HTML) 4 Page - NXP Semiconductors |
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December 1990 4 Philips Semiconductors Product specification 8-bit parallel-in/serial-out shift register 74HC/HCT166 FUNCTION TABLE Notes 1. H = HIGH voltage level h = HIGH voltage level one set-up time prior to the LOW-to-HIGH CP transition L = LOW voltage level I = LOW voltage level one set-up time prior to the LOW-to-HIGH CP transition q = lower case letters indicate the state of the referenced output one set-up time prior to the LOW-to-HIGH CP transition X = don’t care ↑ = LOW-to-HIGH CP transition OPERATING MODES INPUTS Qn REGISTER OUTPUT PE CE CP DS D0-D7 Q0 Q1-Q6 Q7 parallel load I I I I ↑ ↑ X X I- I h - h L H L - L H - H L H serial shift h h I I ↑ ↑ I h X - X X-X L H q0 - q5 q0 - q5 q6 q6 hold “do nothing” X h X X X - X q0 q1 - q6 q7 Fig.4 Functional diagram. |
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