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NBC12439AFAR2G Datasheet(PDF) 2 Page - ON Semiconductor |
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NBC12439AFAR2G Datasheet(HTML) 2 Page - ON Semiconductor |
2 / 20 page NBC12439, NBC12439A http://onsemi.com 2 Figure 1. Block Diagram (28--Lead PLCC) 7--BIT ÷ M COUNTER ÷ 2 7--BIT SR 2--BIT SR 3--BIT SR ÷ 2 10--20MHz S_LOAD P_LOAD S_DATA S_CLOCK XTAL1 XTAL2 OSC 4 5 PHASE DETECTOR 28 7 LATCH VCO ÷ N (1,2,4,8) LATCH 400--800 MHz FOUT FOUT +3.3 or 5.0 V 21, 25 24 23 VCC LATCH TEST 20 +3.3 or 5.0 V PLL_VCC FREF 01 27 26 01 M[6:0] 7 8 14 N[1:0] 2 17, 18 22, 19 OE 6 FREF_EXT 3 XTAL_SEL 15 1 PWR_DOWN 2 POWER DOWN Table 1. Output Division N [1:0] Output Division 00 01 10 11 2 4 8 1 Table 2. XTAL_SEL And OE Input 0 1 PWR_DOWN XTAL_SEL OE FOUT FREF_EXT Outputs Disabled FOUT ÷ 16 XTAL Outputs Enabled |
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