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74ACT574MTC Datasheet(PDF) 2 Page - Fairchild Semiconductor |
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74ACT574MTC Datasheet(HTML) 2 Page - Fairchild Semiconductor |
2 / 9 page www.fairchildsemi.com 2 Logic Symbols IEEE/IEC Connection Diagram Pin Descriptions Function Table H HIGH Voltage Level L LOW Voltage Level X Immaterial Z High Impedance LOW-to-HIGH Transition NC No Change Functional Description The AC/ACT574 consists of eight edge-triggered flip-flops with individual D-type inputs and 3-STATE true outputs. The buffered clock and buffered Output Enable are com- mon to all flip-flops. The eight flip-flops will store the state of their individual D-type inputs that meet the setup and hold time requirements on the LOW-to-HIGH Clock (CP) transition. With the Output Enable (OE) LOW, the contents of the eight flip-flops are available at the outputs. When OE is HIGH, the outputs go to the high impedance state. Oper- ation of the OE input does not affect the state of the flip- flops. Logic Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. Pin Names Description D0–D7 Data Inputs CP Clock Pulse Input OE 3-STATE Output Enable Input O0–O7 3-STATE Outputs Inputs Internal Outputs Function OE CP D Q ON HH L NC Z Hold H H H NC Z Hold H L L Z Load H H H Z Load L L L L Data Available L H H H Data Available L H L NC NC No Change in Data L H H NC NC No Change in Data |
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