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LSF0204: LSF0204

Vladimir Pichenko
Prodigy 40 points
Part Number: LSF0204
Other Parts Discussed in Thread: LSF0108,

I used LSF0204 and LSF0108 in VQFN package type with pull-up resistor in Vref chain and not use it for data channel. I used B side 3.3V and A side 5V.

0108 chip worked OK in both side. But 0204 have on the side B  3.3V and on A side 2.4V. And should have 3.3V as in 0108.

My question is :

- what is difference between these chips ?

- why 0108 work and 0204 not ?

  • 0
    TI__Guru* 96977 points
    Hi Vladimir,

    These devices operate essentially the same, however the LSF0204 incorporates the 200kohm resistor required for the bias circuit into its internal structure. It also adds some circuitry to allow for a simpler external enable pin.

    Can you provide a schematic showing how these are connected in your circuit? They should operate identically as far as the I/O signals are concerned, but the application circuit is a bit different for each.