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SN74LVC1G123: SN74LVC1G123

Ali Masoudi
Prodigy 20 points
Part Number: SN74LVC1G123

Hello everyone,

I was looking for a high-speed pulse generator when I come across Single Retriggerable Monostable Multivibrator from TI (SN74LVC1G123): www.ti.com/.../datasheet

On the TI website, the frequency of this IC is given as 150MHz. But in the datasheet, the timing diagrams (diagrams of page 14 for instance) are all cut off. Does anyone know what is the shortest pulse-width that can be achieved using this IC?

Thanks,

Ali

  • 0
    TI__Guru* 96862 points
    As with many of our devices, the capabilties of the part exceed the datasheet guaranteed specs. The plots on the datasheet show the output pulse minimum to be around 100ns, and the datasheet plots are the values we recommend using the device for.

    Referring to Figure 5, using the curve for a 1 kohm resistor: a 10pF capacitor yields ~90ns pulse width.

    It is theoretically possible to connect an even smaller capacitor with an even smaller resistor to get a shorter pulse width. I have connected this device with no capacitor at all on a board with fairly high trace capacitances (~30pF) and seen it operate. I'm afraid I don't recall the exact pulse width, but I remember that I was impressed that it could still work with such a small capacitance.

    The best advice I can give would be to get some samples and test your desired RC values.
  • 0 in reply to Emrys Maier
    Prodigy 20 points
    Hi Emrys,

    Thanks for your help, really appreciate it.

    Best regards,
    Ali