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MC10166 Arkusz danych(PDF) 4 Page - ON Semiconductor |
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MC10166 Arkusz danych(HTML) 4 Page - ON Semiconductor |
4 / 6 page MC10166 http://onsemi.com 4 APPLICATION INFORMATION FIGURE 1 — 9−BIT MAGNITUDE COMPARATOR A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7 A8 B8 A0 A1 A2 A3 A4 B0 B1 B2 B3 B4 MC10166 A > BA < B A0 A1 A2 A3 A4 B0 B1 B2 B3 B4 A > B A < B A<B For 9−Bit Word A = B A>B A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 B0 A1 B1 A2 B2 A3 B3 A4 B4 A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 A < B A > B A < B A > B A < B A > B A = B A < B A > B B4 A4 B3 A3 B2 A2 B1 A1 B0 A0 A < B A > B B24 A24 B23 A23 B22 A22 B21 A21 B20 A20 B19 A19 B18 A18 B17 A17 B16 A16 B15 A15 B14 A14 B13 A13 B12 A12 B11 A11 B10 A10 B9 A9 B8 A8 B7 A7 B6 A6 B5 A5 B4 A4 B3 A3 B2 A2 B1 A1 B0 A0 B4 A4 B3 A3 B2 A2 B1 A1 B0 A0 A < B A > B A0 B4 A4 B3 A3 B2 A2 B1 A1 B0 A0 A < B A > B FIGURE 2 — 25−BIT MAGNITUDE COMPARATOR The MC10166 compares the magnitude of two 5−bit words. Two outputs are provided which give a high lev- el for A > B and A < B. The A = B function can be ob- tained by wire−ORing these outputs (a low level indi- cates A = B) or by NORing the outputs (a high level indi- cates A = B). For longer word lengths, the MC10166 can be seri- ally expanded or cascaded. Figure 1 shows two devices in a serial expansion for a 9−bit word length. The A > B and A < B outputs are fed to the A0 and B0 inputs re- spectively of the next device. The connection for an A = B output is also shown. The worst case delay time of serial expansion is equal to the number of comparators times the data−to−output delay. For shorter delay times than possible with serial ex- pansion, devices can be cascaded. Figure 2 shows a 25−bit cascaded comparator whose worst case delay is two data−to−output delays. The cascaded scheme can be extended to longer word lengths. MC10166 |
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