The 155-0088-00 is a Tek-made custom "Legend Generator C2" IC. It comes in a 20-pin plastic DIP.
Used in
- readout system of the 7D15 counter plug-in
- readout system of the 7L13 spectrum analyzer plug-in (U2065)
- readout system of the 7L14 spectrum analyzer plug-in (A66U2065)
Datasheet