Tool/software:
Hi
We have an old design where with SN74LV273A on our PCBA. To further reduce powerr consumption in SHUTDOWN and idle mode we want to turn this IC off and put the pins into high impdeance
We already use TPS22930 load switch in our design and I want to add one extra to control VCC on/off, but in the SN74LV237A datasheet it says:
8.3.3 Partial Power Down (Ioff) This device includes circuitry to disable all outputs when the supply pin is held at 0 V. When disabled, the outputs will neither source nor sink current, regardless of the input voltages applied. The amount of leakage current at each output is defined by the Ioff specification in the Electrical Characteristics table.
if we use TPS22930 it will not hold the supply pin at 0V, but it will be floating. Is that OK, or will I have to add a weak pull down on the VCC input pin?
kind regards
Øystein
