Other Parts Discussed in Thread: SN74LXC8T245, TMUX1574, SN74LV4066A
Hello,
I need to interface my 3.3V MCU IO ports to a connector that will be connected to either a 5V or a 3.3V system.
I learned about the SN74LVC4245A, an 8-bit bus transceiver with two separate supply rails VCCA(5V) and VCCB(3.3V). but the datasheet states that the control circuitry (DIR, OE) is powered by VCCA (i.e. 5V).
My question is, can I connect (DIR, OE) to my 3.3V MCU pins since the MCU is the source of the I/O signals? I am afraid that if I connect them, it will shorten the 5V and 3.3V rails.!!
And if there are any other similar chips that translate 3.3V I/O to both 3.3V/5V systems?
Thank you,