DS100KR401_13 Datasheet, PDF (28/38 Pages) Texas Instruments – Ultra Low Power, 4 Lane (8-channel, bi-directional) Repeater for Data-rates up to 10.3 Gbps

DS100KR401
SNLS395B – JANUARY 2012 – REVISED MARCH 2012
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POWER SUPPLY BYPASSING
Two approaches are recommended to ensure that the DS100KR401 is provided with an adequate power supply.
First, the supply (VDD) and ground (GND) pins should be connected to power planes routed on adjacent layers
of the printed circuit board. The layer thickness of the dielectric should be minimized so that the V_DD and GND
planes create a low inductance supply with distributed capacitance. Second, careful attention to supply
bypassing through the proper use of bypass capacitors is required. A 0.1 μF bypass capacitor should be
connected to each V_DD pin such that the capacitor is placed as close as possible to the DS100KR401. Smaller
body size capacitors can help facilitate proper component placement. In the case of 3.3V mode operation with
the internal LDO regulator, recommend using capacitors with capacitance in the range of 1.0 μF to 10 μF should
be incorporated in the power supply bypassing design for the VIN pin. These capacitors should be ultra-low ESR
ceramic.
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