Sorry to have to bring this up again but the last two replies don't seem to tie up, at leat in my interpreatation.
Madworm says its the voltage drop measured at pin, which, as I interpret it is: 4V supply - 3.4V Vf on LED = 0.6 VOut
jluciani says its 4V, which I think he means is either max Vf for the LEDs or supply voltage .. ?
Problem with this value is that the calculation at 4V supply, with 30 milliamps (dot correction and pwm at 100%) looks like this:
P = (Vcc x Icc) + (Vout * Imax * (DCn)/63 * Dpwm * N)
P = (5 x 0.130) + (4 * 0.025 * 1 * 1 * 16)
p = 0.65 + 1.92 = 2.57W
The package rating is 2.4W (at 25C)
Does this mean that the recommended constant output current for all outputs at 60 milliamps in the datasheet is unachievable, insofar the DIP package is concerned?