UPD720133 查看數據表（PDF） - NEC => Renesas Technology

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UPD720133

USB2.0 to IDE Bridge

NEC => Renesas Technology 

µPD720133

Two Power Supply Rails Limitation

The µPD720133 has two power supply rails (2.5 V, 3.3 V). The system will require the power supply rail to be

stable at VDD level by a specified time. However, there are difference between the time of VDD25 and VDD33 becoming

stable. The µPD720133 requires that VDD25 becomes stable before VDD33. Also, it is necessary that VDD33 be powered

within 100 ms after VDD25 became stable. In any case, the system must ensure that the absolute maximum ratings for

VI / VO are not exceeded. System reset signaling must be asserted after the specified time of which both VDD25 and

VDD33 become stable.

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Preliminary Data Sheet S17100EJ2V0DS

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