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MC10H179 Folha de dados(PDF) 3 Page - ON Semiconductor |
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MC10H179 Folha de dados(HTML) 3 Page - ON Semiconductor |
3 / 6 page MC10H179 http://onsemi.com 3 PG = P0 + P1 + P2 + P3 GG = (G0 + P1 + P2 + P3) (G1 + P2 + P3) (G2 + P3) G3 CN+2 =(CN + P0 + P1) (G0 + P1) G1 CN+4 =(CN + P0 + P1 + P2 + P3) (G0 + P1 + P2 + P3) (G1 + P2 + P3) (G2 + P3) G3 VCC1 = PIN 1 VCC2 = PIN 16 VEE = PIN 8 G3 5 P3 13 G2 9 P2 12 CN 11 G1 7 P1 10 G0 4 P0 14 3 CN+4 2 GG 15 PG 6 CN+2 LOGIC DIAGRAM TYPICAL APPLICATIONS The MC10H179 is a high−speed, low−power, standard MECL complex function that is designed to perform the look−ahead carry function. This device can be used with the MC10H181 4−bit ALU directly, or with the MC10H180 dual arithmetic unit in any computer, instrumentation or digital communication application requiring high speed arithmetic operation on long words. When used with the MC10H181, the MC10H179 performs a second order or higher look−ahead. Figure 2 shows a 16−bit look−ahead carry arithmetic unit. Second order carry is valuable for longer binary words. As an example, addition of two 32−bit words is improved from 30 nanoseconds with ripple−carry techniques. A block diagram of a 32−bit ALU is shown in Figure 1. The MC10H179 may also be used in many other applications. It can, for example, reduce system package count when used to generate functions of several variables. Cin Cout Add Time = 18 ns typ Cn+2 MC10H179 Cn+2 MC10H179 Cn Cn+4 Cn Cn+4 ALU PG Cn Cn+4 ALU PG Cn Cn+4 ALU PG Cn Cn+4 ALU PG Cn Cn+4 ALU PG Cn ALU PG Cn ALU PG Cn ALU PG Cn FIGURE 1 − 32−BIT ALU WITH CARRY LOOK−AHEAD |
Nº de peça semelhante - MC10H179 |
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Descrição semelhante - MC10H179 |
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