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==165-2089-xx Pinout== | ==165-2089-xx Pinout== | ||
In the 11A32, 11A34, and 11A52, pairs of 165-2089-xx IC are placed on the board so that their output are facing each other, | |||
allowing their outputs to be wired in parallel. | |||
To minimize board complexity and keep the layout symmetrical, the purpose of the output channels varies: | |||
* Output 1 (pins 25 and 26) is either AUX SIG (aka AUX TRIGGER) or DISPLAY, depending on the position of the IC on the board. | |||
* Output 2 (pins 22 and 23) of all 165-2089-xx ICs are the TRIGGER signal. | |||
* Output 3 (pins 19 and 20) is either AUX SIG (aka AUX TRIGGER) or DISPLAY, depending on the position of the IC on the board. | |||
Note that in the 11A32 and 11A34, the HF ADJUST control voltages are not set identically for the three outputs. | Note that in the 11A32 and 11A34, the HF ADJUST control voltages are not set identically for the three outputs. | ||
The reason for this is that the DISPLAY and TRIGGER outputs are in parallel with the corresponding output from another | The reason for this is that the DISPLAY and TRIGGER outputs are in parallel with the corresponding output from another | ||