器件名称:
MC74ACT378D
功能描述:
PARALLEL D REGISTER WITH ENABLE
文件大小:
186.31KB 共7页
简 介:
MC74AC378 MC74ACT378 Parallel D Register with Enable The MC74AC378/74ACT378 is a 6-bit register with a buffered common Enable. This device is similar to the MC74AC174/74ACT174, but with common Enable rather than common Master Reset. 6-Bit High-Speed Parallel Register Positive Edge-Triggered D-Type Inputs Fully Buffered Common Clock and Enable Inputs Outputs Source/Sink 24 mA ′ACT378 Has TTL Compatible Inputs PARALLEL D REGISTER WITH ENABLE VCC 16 Q5 15 D5 14 D4 13 Q4 12 D3 11 Q3 10 CP 9 N SUFFIX CASE 648-08 PLASTIC PIN NAMES E D0–D5 CP Q0–Q5 Enable Input Data Inputs Clock Pulse Input Outputs D SUFFIX CASE 751B-05 PLASTIC 1 E 2 Q0 3 D0 4 D1 5 Q1 6 D2 7 Q2 8 GND TRUTH TABLE Inputs E H L L CP Dn X H L Outputs Qn No Change H L LOGIC SYMBOL E D0 D1 D2 D3 D4 D5 CP Q0 Q1 Q2 Q3 Q4 Q5 H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial = LOW-to-HIGH Transition FACT DATA 5-1 MC74AC378 MC74ACT378 FUNCTIONAL DESCRIPTION The MC74AC378/74ACT378 consists of six edgetriggered D-type flip-flops with individual D inputs and Q outputs. The Clock (CP) and Enable (E) inputs are common to all flip-flops. When the E input is LOW, new data is entered into the register on the LOW-to-HIGH transition of the CP input. When the E input is HIGH, the register will retain the present data independent of the CP input. LOGIC DIAGRAM D0 CP D1 D2 D3 D4 D5 CP E D E Q CP D E Q CP D E Q CP D E Q CP D E Q CP D Q E Q0 Q1 Q2 Q3 Q4 Q5 Please note that this diagram i……
