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CD40108BMS датащи(PDF) 7 Page - Intersil Corporation |
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CD40108BMS датащи(HTML) 7 Page - Intersil Corporation |
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7 / 11 page ![]() 7-31 CD40108BMS Block Diagram FIGURE 1. TRUTH TABLE CLOCK WRITE ENABLE WRITE 1 WRITE 0 READ 1A READ 0A READ 1B READ 0B ENABLE A ENABLE B DN QnA QnB 1 S1 S2 S1S2S1S2 1 1 1 1 1 1 S1 S2 S1S2S1S2 1 1 0 0 0 X X X X XXXX 0 0 X Z Z 1 0 0 0110 1 1 Dn to word 0 Word 1 out Word 2 out 0 0 0 0110 1 1 Word 0 not altered Word 1 out Word 2 out X X X X 1001 1 1 X Word 2 out Word 1 out X X X XXXX 1 1 X NC NC 1 = High Level 0 = Low Level X = Don’t Care Z = High Impedance S! and S2 refer to input states of either 1 or 0 Typical Performance Characteristics FIGURE 2. TYPICAL OUTPUT LOW (SINK) CURRENT CHARACTERISTICS FIGURE 3. MIMIMUM OUTPUT LOW (SINK) CURRENT CHARACTERISTICS Q0 A Q1 A Q2 A Q3 A W0 W1 R0A R1A R0B R1B DEC DEC DEC WORD A OUTPUT ENABLE A Q0 B Q1 B Q2 B Q3 B WORD B OUTPUT ENABLE B D0 D1 D2 D3 DATA INPUT CL WE 4 X 4 MEMORY 10V 5V AMBIENT TEMPERATURE (TA) = +25 oC GATE-TO-SOURCE VOLTAGE (VGS) = 15V 0 5 10 15 15 10 5 20 25 30 DRAIN-TO-SOURCE VOLTAGE (VDS) (V) 10V 5V AMBIENT TEMPERATURE (TA) = +25 oC GATE-TO-SOURCE VOLTAGE (VGS) = 15V 0 5 10 15 7.5 5.0 2.5 10.0 12.5 15.0 DRAIN-TO-SOURCE VOLTAGE (VDS) (V) |
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