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CC2541: DC characteristics as a function of supply voltage

David M. Alter
Guru 61235 points
Other Parts Discussed in Thread: CC2541

CC2541 Team,

The CC2541 datasheet, swrs110d, p.4, specifies allowed operating supply voltage of 2.0 and 3.6 V.  However, pretty much all of the specs are provided only at 3V, in particular the D.C. specifications on p.16.

In most other devices I've seen, the GPIO specs are provided as a function of Vdd.

What are the D.C. specifications as a function of Vdd?  Specifically, 2.0 <= Vdd <= 2.1 V if you want a specific supply range.

This question was asked in the past:

https://e2e.ti.com/support/wireless_connectivity/bluetooth_low_energy/f/538/t/354662

https://e2e.ti.com/support/wireless_connectivity/bluetooth_low_energy/f/538/t/248821

The second thread above says one can use 0.8*Vdd as the MIN Logic-1 input voltage.  This is just the scaling value for the 3V spec (i.e., 2.4 = 0.8*3V).

Is it safe to assume that all the voltage specs above scale the same way?  What about the current specs?

Thank you,

David

  • 0
    TI__Guru 55305 points
    Hi David,

    Yes, the scaling applies across the operating VDD range typically.
  • 0 in reply to Christin Lee
    TI__Guru 61235 points

    Christin,

    Thank you for your response.

    Christin Lee said:


    Yes, the scaling applies across the operating VDD range typically.

    That covers the Logic-0 and Logic-1 input voltages.  What about the rest of the values in the DC Characteristics table?  I made modifications in red to the table below.  Are these all correct?  I think they are.  Not sure about the two current specs and the resistance spec of 20 kOhm however.  I did not change these.  I think the 20 kOhm is probably constant across VDD.  The two current specs may also be OK provided they are just covering "Across the operating range" of VDD=2 to 3.6V.  Not sure.
    Thank you,
    David