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8T49N028 Datasheet(PDF) 4 Page - Integrated Device Technology |
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8T49N028 Datasheet(HTML) 4 Page - Integrated Device Technology |
4 / 36 page REVISION 1 10/16/14 4 FEMTOCLOCK® NG CRYSTAL-TO-3.3V, 2.5V MULTIPLE FREQUENCY CLOCK GENERATOR W/FANOUT BUFFER 8T49N028 DATA SHEET Table 2. Pin Characteristics Frequency Configuration Table 3A. Frequency Configuration Examples NOTE: Each device supports four output frequencies (with related input or crystal value) as selected from this Register Settings Table. NOTE: XTAL operation: Using divA fOUT = fREF * PS * [M / (NA x PNA)]. Using divB fOUT = fREF / P * PS * [M / (NA x PNA)]. Using divB fOUT = fREF / P * PS * M / NB. Symbol Parameter Test Conditions Minimum Typical Maximum Units CIN Input Capacitance 3.5 pF RPULLDOWN Input Pulldown Resistor 51 k RPULLUP Input Pullup Resistor 51 k ROUT Output Impedance LOCK VCCO_A = VCCO_B = VCCO_C = VCCO_D = 3.465V 22 VCCO_A = VCCO_B = VCCO_C = VCCO_D = 2.625V 27 divA Frequency (MHz) divB Frequency (MHz) Input Frequency (MHz) Input Clock Divider P Input Clock Prescaler PS Feedback Divider M Output Divider A PNA x NA Output Divider B NB VCO Frequency (MHz) 100.00 120.00 25.00 1 x2 48 24 20 2400.00 100.00 125.00 25.00 1 x2 50 25 20 2500.00 100.00 156.25 25.00 1 x2 50 25 16 2500.00 100.00 150.00 25.00 1 x2 48 24 16 2400.00 100.00 250.00 25.00 1 x2 50 25 10 2500.00 100.00 312.50 25.00 1 x2 50 25 8 2500.00 100.00 400.00 25.00 1 x2 48 24 6 2400.00 100.00 500.00 25.00 1 x2 50 25 5 2500.00 100.00 625.00 25.00 1 x2 50 25 4 2500.00 125.00 75.00 25.00 1 x1 90 18 30 2250.00 125.00 156.25 25.00 1 x2 50 20 16 2500.00 125.00 187.50 25.00 1 x1 90 18 12 2250.00 125.00 200.00 25.00 1 x2 40 16 10 2000.00 125.00 250.00 25.00 1 x2 40 16 8 2000.00 125.00 312.50 25.00 1 x2 50 20 8 2500.00 125.00 400.00 25.00 1 x2 40 16 5 2000.00 125.00 500.00 25.00 1 x2 50 20 5 2500.00 125.00 625.00 25.00 1 x2 50 20 4 2500.00 30.72 122.88 19.20 1 x2 64 80 20 2457.60 30.72 153.60 19.20 1 x2 64 80 16 2457.60 122.88 153.60 19.20 1 x2 64 20 16 2457.60 122.88 491.52 19.20 1 x2 64 20 5 2457.60 153.60 491.52 19.20 1 x2 64 16 5 2457.60 155.52 622.08 19.44 1 x2 64 16 4 2488.32 19.20 153.60 30.72 1 x2 40 128 16 2457.60 153.60 491.52 30.72 1 x2 40 16 5 2457.60 |
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