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MAX3622 Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX3622 Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 9 page Layout Considerations The inputs and outputs are critical paths for the MAX3622, and care should be taken to minimize dis- continuities on these transmission lines. Here are some suggestions for maximizing the MAX3622’s perfor- mance: • An uninterrupted ground plane should be posi- tioned beneath the clock I/Os. • Supply and ground pin vias should be placed close to the IC and the input/output interfaces to allow a return current path to the MAX3622 and the receive devices. • Supply decoupling capacitors should be placed close to the MAX3622 supply pins. • Maintain 100 Ω differential (or 50Ω single-ended) transmission line impedance out of the MAX3622. • Use good high-frequency layout techniques and a multilayer board with an uninterrupted ground plane to minimize EMI and crosstalk. Refer to the MAX3622 Evaluation Kit for more information. Low-Jitter, Precision Clock Generator with Two Outputs 8 _______________________________________________________________________________________ MAX3622 VCCA QAC_OE QB_OE QA_C X_OUT X_IN GNDO_A GND VCC VCCO_B VDDO_A 10.5 Ω 0.01 μF 0.1 μF VCC 36 Ω Z0 = 50 Ω ASIC 125MHz QB 50 Ω Z0 = 50 Ω QB Z0 = 50 Ω ASIC 50 Ω 156.25MHz (VCC - 2V) 10 μF 0.1 μF 25MHz (CL = 18pF) 33pF 27pF 0.01 μF 0.1 μF +3.3V ±5% VCC Typical Application Circuit |
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