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M1025-1Z-167.3316 Datasheet(PDF) 3 Page - Integrated Circuit Systems |
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M1025-1Z-167.3316 Datasheet(HTML) 3 Page - Integrated Circuit Systems |
3 / 14 page M1025/26 Datasheet Rev 1.0 3 of 14 Revised 28Jul2004 Integr ated Circuit Systems , Inc. ● Netw o r ki ng & C o mmun ica t io ns ● ww w. icst.com ● tel (5 08) 85 2-54 00 M1025/26 VCSO BASED CLOCK PLL WITH AUTOSWITCH Prod uct Data Sh eet Integrated Circuit Systems, Inc. DETAILED BLOCK DIAGRAM Figure 3: Detailed Block Diagram DIVIDER SELECTION TABLES M and R Divider Look-Up Tables (LUT) The MR_SEL3:0 pins select the feedback and reference divider values M and R to enable adjustment of loop bandwidth and jitter tolerance. The look-up tables vary by device variant. M1025 and M1026 are defined in Tables 3 and 4 respectively. M1025 M/R Divider LUT ables 3 and 4 provide example Fin and phase detector frequencies with 155.52MHz VCSO devices (M1025-11-155.5200 and M1026-11-155.5200). See “Ordering Information” on pg. 14 . M1026 M/R Divider LUT Phase Locked Loop (PLL) M 1025/26 SAW Delay Line Phase Shifter VCSO C PO ST C PO ST VC nVC R POST nO P_O UT OP_OUT R POST R LOOP R LOOP C LO OP C LO OP OP_IN nOP_IN PLL Phase Detector Loop Filter Am plifier External Loop Filter Components M R_SEL3:0 R Div MUX 0 R EF_SEL DIF_R EF0 nDIF_R EF0 1 M Divider NBW R IN R IN M / R Divider LUT DIF_R EF1 nDIF_R EF1 Auto Ref Sel 0 1 LO L Phase Detector REF_AC K AUTO LO L FO UT nFO UT P_SEL1:0 P Divider LUT P Divider (1, 2, or TriState) 4 2 TriState Hitless Switching (HS) Opt. HS with Phase Build-out Opt. MR_SEL3:0 M Div R Div Total PLL Ratio Fin for 155.52MHz VCSO (MHz) Phase Det. Freq. for 155.52MHz VCSO (MHz) 0 0 0 0 8 1 8 19.44 19.44 0 0 0 1 32 4 8 19.44 4.86 0 0 1 0 128 16 8 19.44 1.215 0 0 1 1 512 64 8 19.44 0.30375 0 1 0 0 2 1 2 77.76 77.76 0 1 0 1 8 4 2 77.76 19.44 0 1 1 0 32 16 2 77.76 4.86 0 1 1 1 128 64 2 77.76 1.215 1 0 0 0 1 1 1 155.52 155.52 1 0 0 1 4 4 1 155.52 38.88 1 0 1 0 16 16 1 155.52 9.72 1 0 1 1 64 64 1 155.52 2.43 1 1 0 0 Test Mode1 Note 1: Factory test mode; do not use. N/A N/A N/A 1 1 0 1 1 4 0.25 622.08 155.52 1 1 1 0 4 16 0.25 622.08 38.88 1 1 1 1 16 64 0.25 622.08 9.72 Table 3: M1025 M/R Divider LUT MR_SEL3:0 M Div R Div Total PLL Ratio Fin for 155.52MHz VCSO (MHz) Phase Det. Freq. for 155.52MHz VCSO (MHz) 0 0 0 0 4 1 4 38.88 38.88 0 0 0 1 16 4 4 38.88 9.72 0 0 1 0 64 16 4 38.88 2.43 0 0 1 1 256 64 4 38.88 0.6075 0 1 0 0 2 1 2 77.76 77.76 0 1 0 1 8 4 2 77.76 19.44 0 1 1 0 32 16 2 77.76 4.86 0 1 1 1 128 64 2 77.76 1.215 1 0 0 0 1 1 1 155.52 155.52 1 0 0 1 4 4 1 155.52 38.88 1 0 1 0 16 16 1 155.52 9.72 1 0 1 1 64 64 1 155.52 2.43 1 1 0 0 Test Mode1 Note 1: Factory test mode; do not use. N/A N/A N/A 1 1 0 1 1 4 0.25 622.08 155.52 1 1 1 0 4 16 0.25 622.08 38.88 1 1 1 1 16 64 0.25 622.08 9.72 Table 4: M1026 M/R Divider LUT |
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