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74AC74 Datasheet(PDF) 2 Page - STMicroelectronics |
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74AC74 Datasheet(HTML) 2 Page - STMicroelectronics |
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INPUT AND OUTPUT EQUIVALENT CIRCUIT LOGIC DIAGRAMS PIN DESCRIPTION PIN No SYMBOL NAME AND F UNCTIO N 1, 13 1CLR, 2CLR Asyncronous Reset - Direct Input 2, 12 1D, 2D Data Inputs 3, 11 1CK, 2CK Clock Input (LOW-to-HIGH, Edge- Triggered) 4, 10 1PR, 2PR Asyncronous Set - Direct Input 5, 9 1Q, 2Q True Flip-Flop Outputs 6, 8 1Q, 2Q Complement Flip-Flop Outputs 7 GND Ground (0V) 14 VCC Positive Supply Voltage TRUTH TABLE INPUTS OUT PUT S F UNCT IO N CLR PRDCK Q Q L H X X L H CLEAR H L X X H L PRESET LL X X H H HH L L H HH H H L HHX Qn Qn NO CHANGE X: Don’t Care This logic diagram has not be used to estimate propagation delays 74AC74 2/11 |
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