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TXS0104E-Q1: Propagation delay time (high to low), from B (input) to A (output) Open-drain driving

Shiraz Macuff
Prodigy 70 points
Part Number: TXS0104E-Q1
Other Parts Discussed in Thread: TXU0104-Q1

The datasheet is specified at 97 ns propagation delay time (high to low), from B (input) to A (output) Open-drain driving.

My configuration is as follows:

I have and open collector driving input B for an incremental encoder. No additional pullup is being used.

output A is connected directly to the DSP.

1) Will this configuration have a max prop delay of 97 ns?

2) Will the prop delay be equal on all channels or would the output signals be skewed from one channel to the other channels?

If so, can you recommend a faster chip for this configuration? I need -40 to 125C

Thanks

  • 0
    TI__Mastermind 42600 points

    Hey Shiraz,

    That prop delay is given with certain supply configurations and capacitive loading (CL) which are variables that impact that parameter. If your device has similar configuration in the system then yes you can expect to have a max of 97 ns. The actual prop delay should be the same for each channel, but again the loading plays a big part so it one channel has heavier loading, it will be slower.

    For a faster prop delay, I would recommend a buffered device like the TXU0104-Q1. It has a similar pinout to the TXS0104E-Q1.

  • 0 in reply to Dylan Hubbard
    Prodigy 70 points

    Thanks Dylan,

    Will have a look at the other chip