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SN74LVC1G07-Q1: Inconsistent issues with power-on spikes and low temperatures.

Part Number: SN74LVC1G07-Q1
Other Parts Discussed in Thread: SN74LVC1G125-Q1, SN74LVC1G126-Q1

Hi team,

There are two problems in customers using SN74LVC1G07-Q1 as reset driver device for EMMC. The front stage is a pin of the SOC chip, and the latter stage is the RST pin of the EMMC

Question1:For the SN74LVC1G07-Q1 chip, the input signal is always low level, but when the logic device is powered on, the output pin will have a high peak.
What caused this output to be uncontrollable for a while? Can it be avoided or optimized? For screenshots, refer to the RST waveform marked in red in the figure below.

Question 2:The output of the above logic device has a peak. They tested this batch of devices, and the amplitude at room temperature is basically the same, around 600mv;
But the amplitude at low temperature is inconsistent, some are still 600mv unchanged, some become about 800mV, you can refer to the following RST waveform:
What is the reason for this difference? Which parameter of the device is determined?

Looking forward to your reply!

  • Below the minimum recommended supply voltage of 1.65 V, correct operation is not guaranteed. In particular, the output will not be able to drive low as long as the gate threshold voltage of the internal MOSFETs has not yet been reached.

    Devices with /OE or OE input (e.g., SN74LVC1G125-Q1/SN74LVC1G126-Q1) guarantee that the output is disabled during power up if /OE is pulled low or OE high.