поискавой системы для электроныых деталей |
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SN74LS395J датащи(PDF) 2 Page - Motorola, Inc |
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SN74LS395J датащи(HTML) 2 Page - Motorola, Inc |
2 / 6 page 5-552 FAST AND LS TTL DATA SN74LS395 LOGIC DIAGRAM S Ds CP MR OE P0 P1 P2 P3 O0 O1 O2 O3 Q3 CP D CD Q CP D CD Q CP D CD Q CP D CD Q FUNCTION DESCRIPTION The SN74LS395 contains four D-type edge-triggered flip-flops and auxiliary gating to select a D input either from a Parallel (Pn) input or from the preceding stage. When the Select input is HIGH, the Pn inputs are enabled. A LOW signal on the S input enables the serial inputs for shift-right opera- tions, as indicated in the Truth Table. State changes are initiated by HIGH-to-LOW transitions on the Clock Pulse (CP) input. Signals on the Pn, Ds and S inputs can change when the Clock is in either state, provided that the recommended set-up and hold times are observed. When the S input is LOW, a CP HIGH-LOW transition transfers data in Q0 to Q1, Q1 to Q2, and Q2 to Q3. A left-shift is accomplished by connecting the outputs back to the Pn inputs, but offset one place to the left, i.e., O3 to P2, O2 to P1 and O1 to P0, with P3 acting as the linking input from another package. When the OE input is HIGH, the output buffers are disabled and the Q0–Q3 outputs are in a high impedance condition. The shifting, parallel loading or resetting operations can still be accomplished, however. MODE SELECT — TRUTH TABLE Inputs @ tn Outputs @ tn+1 Operating Mode MR CP S Ds Pn O0 O1 O2 O3 Asynchronous Reset L X X X X L L L L Shift, SET First Stage H L H X H O0n O1n O2n Shift, RESET First Stage H L L X L O0n O1n O2n Parallel Load H H X Pn P0 P1 P2 P3 H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial tn, n + 1 = time before and after CP HIGH-to-LOW transition NOTE: When OE is HIGH, outputs O0 – O3 are in the high impedance state; however, this does not affect other operations or the Q3 output. GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 4.75 5.0 5.25 V TA Operating Ambient Temperature Range 0 25 70 °C IOH Output Current — High – 0.4 mA IOL Output Current — Low 8.0 mA |
Аналогичный номер детали - SN74LS395J |
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Аналогичное описание - SN74LS395J |
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