SN74LVC1G07: Max Frequency

Fernando Diaz

Prodigy 30 points

Part Number: SN74LVC1G07
Other Parts Discussed in Thread: TXU0101, SN74LVC1G34

Tool/software:

What is the maximum frequency you can push through this device (SN74LVC1G07)?

6 months ago

0 Clemens Ladisch 6 months ago

Guru 303770 points

This device has an open-drain output, so the speed of rising edges is limited by the pull-up resistor and the load capacitance.

If you need a high output frequency, use a buffer with push/pull output like the SN74LVC1G34/17. For level shifting, use something like the TXU0101.

+1 Fernando Diaz 6 months ago in reply to Clemens Ladisch

Prodigy 30 points

Thanks for you reply. Assuming load capacitance is non existing and having a pull up of 2.5k. What would be again the max frequency? I need an open drain/collector buffer

0 Clemens Ladisch 6 months ago in reply to Fernando Diaz

Guru 303770 points

A CMOS input has a capacitance of < 10 pF; traces have a capacitance of roughly 1 pF/cm. R and C form a low-pass filter.

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SN74LVC1G07: Max Frequency