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74HC4046 Datasheet(PDF) 14 Page - ON Semiconductor |
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74HC4046 Datasheet(HTML) 14 Page - ON Semiconductor |
14 / 16 page MC74HC4046A http://onsemi.com 14 APPLICATION INFORMATION The following information is a guide for approximate values of R1, R2, and C1. Figures 19, 20, and 21 should be used as references as indicated below, also the values of R1, R2, and C1 should not violate the Maximum values indicated in the DC ELECTRICAL CHARACTERISTICS tables. Phase Comparator 1 Phase Comparator 2 Phase Comparator 3 R2 = ∞ R2 0 R R2 = ∞ R2 0 R R2 = ∞ R2 0 R • Given f0 • Use f0 with Figure 19 to determine R1 and C1. (see Figure 23 for characteristics of the VCO operation) • Given f0 and fL • Calculate fmin fmin = f0–fL • Determine values of C1 and R2 from Figure 20. • Determine R1–C1 from Figure 21. • Calculate value of R1 from the value of C1 and the product of R1C1 from Figure 21. (see Figure 24 for characteristics of the VCO operation) • Given fmax and f0 • Determine the value of R1 and C1 using Figure 19 and use Figure 21 to obtain 2fL and then use this to calculate fmin. • Given f0 and fL • Calculate fmin fmin = f0–fL • Determine values of C1 and R2 from Figure 20. • Determine R1–C1 from Figure 21. • Calculate value of R1 from the value of C1 and the product of R1C1 from Figure 21. (see Figure 24 for characteristics of the VCO operation) • Given fmax and f0 • Determine the value of R1 and C1 using Figure 19 and Figure 21 to obtain 2fL and then use this to calculate fmin. • Given f0 and fL • Calculate fmin: fmin = f0–fL • Determine values of C1 and R2 from Figure 20. • Determine R1–C1 from Figure 21. • Calculate value of R1 from the value of C1 and the product of R1C1 from Figure 21. (see Figure 24 for characteristics of the VCO operation) PACKAGE DIMENSIONS PDIP–16 N SUFFIX CASE 648–08 ISSUE R MIN MIN MAX MAX INCHES MILLIMETERS DIM A B C D F G H J K L M S 18.80 6.35 3.69 0.39 1.02 0.21 2.80 7.50 0 ° 0.51 19.55 6.85 4.44 0.53 1.77 0.38 3.30 7.74 10 ° 1.01 0.740 0.250 0.145 0.015 0.040 0.008 0.110 0.295 0 ° 0.020 0.770 0.270 0.175 0.021 0.070 0.015 0.130 0.305 10 ° 0.040 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. 2.54 BSC 1.27 BSC 0.100 BSC 0.050 BSC –A – B 18 9 16 F H G D 16 PL S C –T – SEATING PLANE K J M L TA 0.25 (0.010) M M |
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