155-0024-00
The Tektronix 155-0024-00 is a custom chip for the 7000 series readout system, packaged in a 16-pin plastic DIP.
It is an analog read-only memory used as a Character Generator for code row 2, 10 special symbols (↓ < I / + - + C Δ >)
The chip was designed by Barrie Gilbert.