I had not looking for this device long time now, and you are right. It is obsolete now and Vishay does not list any other 455KHz alternative. That is bizzare...

I am sorry for a mistake on the above post, my 120 meter application uses the TSOP1738/31338 device and with a carrier of 38KHz. The pulse train is 15 bursts of 26,3 usec every 400 or 800 usec (2 channels selected by jumper).

The version of TSOP7000 is for a low power IR beam setup and may cover up to 40 meters maximum. It sends 16 pulses of 400ns every 2.2 usec with a period of 17,5msec of pause.

An example of 455KHz carrier would be (on a 12F635):

Code:
For i=0 to 15
    @ bsf gpio,1
    pauseus 390    'this number may be lower or higher depending on internal clock freq
    @ bcf gpio,1
    pause 2200
Next i
I cannot post the full code of my application because it is a commercial one.

Ioannis