SN74CBTLV16212: I/Os

Damien_Effi

Intellectual 555 points

Part Number: SN74CBTLV16212

Tool/software:

Hi all,

I would like to use this component between a NOR flash and a FPGA.

About the I/O, are they directional: A1 to B1 , B1 to A1, A1 to B2, B2 to A1 ?

Is there any needed to have pullup resistors on the I/Os?

Thanks

Damien

9 months ago

+1 Clemens Ladisch 9 months ago

Guru 317260 points

Analog switches are bidirectional; a closed switch behaves like a 3 Ω resistor.

0 Damien_Effi 9 months ago in reply to Clemens Ladisch

Intellectual 555 points

Thanks

So , no pullup needed on the inputs and/or outputs? Because sometimes it is needed.

+1 Clemens Ladisch 9 months ago in reply to Damien_Effi

Guru 317260 points

Pull-ups would be needed for switches implemented with only N-channel MOSFETs, which cannot pass voltages near V_CC. But CBTLV devices use transmission gates.

You might want to add pull-up or -down resistors to keep disconnected lines at a defined voltage.

+1 Kameron Hill 9 months ago in reply to Clemens Ladisch

TI__Mastermind 24440 points

Hi Damien,

In addition to what clemens said you could have pull up or pull down resistors in your design with this device to keep disconnected lines from floating if that is a concern in your system

Finally just to for you understanding here is a FAQ that explains that cbtlv device have a tgate architecture that allows them to pass signals rail to rail.

Please let me know if you have any additional questions

Regards,

Kameron

Switches & multiplexers

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SN74CBTLV16212: I/Os