Hi
We use TL7705A ( replace M51954A) for a dedicated CCLINK Protocol chip.
The CCLINK protocol chip is effective at high level, and the delay time is 3.3ms at Min, TL7705 can satisfy this application condition from datasheet. But there is a problem when we measure,the reset threshold voltage not correct at 4.55V, but only 4V. AND after connecting our protocol chip, it is directly raised to 5V, always 5V.
If we chande the resisror smaller from 10K to 1K, the Protocol chip can work, but the low level is 0.9V, not 0V.
Schematic diagram and test waveform as below:
when we change the reset chip, the Protocol chip can work normally.
Is it OK to simply connect the Pull-down 10K Resistor directly to the RESET pin as shown in the picture, while the other pins remain the same?
the timing diagram shows that the two RESET phase is oppposite,
but when I follow this above circuit, the wave form od R\E\S\E\T\ pin is correct, but the RESTE pin is not right, not the opposite.
Please help advise this application, thanks!
