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Question on SN74CBTLV3384 OE# control

Anonymous
Anonymous
Other Parts Discussed in Thread: SN74CBTLV3384

Hi All,

 

I would like to ask some questions on SN74CBTLV3384 switch.

 

 

 

 

I have found that on sheet 15- EMIF Muxing page of the schematics of EVM6437 (made by Spectrum for DM6437 DSP),  the OE# pins are controlled through an OR gate, rather than directly.

 

The first question is what should be the voltage for OE# signal? Does SCDS059G’s VIH and VIL include OE# signals, or only for input port A1 and A2 signals?

 

The second question is that why the OR gate is used?

 

 

 

 

Thanks,

Zheng