SN74AVC2T45-Q1

Meng jeffrey

Expert 2760 points

Other Parts Discussed in Thread: SN74AVC2T45-Q1, SN74AXC8T245-Q1, SN74LVC1T45-Q1

Is SPI SN74AVC2T45-Q1 level conversion OK?

over 5 years ago

0 ShreyasRao over 5 years ago

TI__Guru 57370 points

Hi Meng,

What are the voltage levels?
You can also consider using the SN74AXC8T245-Q1 which will support SPI in a single device.
The AVC2T45-Q1 can be used but would need 1 of this and 2 of SN74LVC1T45-Q1 to achieve this.

0 Meng jeffrey over 5 years ago in reply to ShreyasRao

Expert 2760 points

Consider the size of the level shifter,CAVC2T45TDCURQ1 is smaller,and 2 lines level shifter is more flexible for use.

I still want use 3 CAVC2T45TDCURQ1 in the 6 lines SPI, 4 signal line direction A to B and 2 signal lines B to A.(A=1.8V,B=3.3V).

Please help confirm if I have make the right use of the CAVC2T45TDCURQ1 in the SPI level shifter circuit?

0 ShreyasRao over 5 years ago in reply to Meng jeffrey

TI__Guru 57370 points

Hi Meng,

I see all the DIR pins are tied to VccA level? would the U46 DIR pin need to be low for the MISO signal?
You could also consider using the SN74AVC4T245Q1 device and another SN74AVC2T45q1 device for the 6 channel device.

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SN74AVC2T45-Q1