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The Tektronix M165 (P/N 155-0086-00) is a custom legend generator monolithic integrated circuit in a 20-pin DIP, designed by Roger McCoy and Mike Metcalf.
It contains a 12×10×4 read-only memory coupled to a 4-bit D/A converter with internal current sources that can directly interface with the row and column current inputs of the 7000 series readout system.
The 155-0086/0087/0088/0104/0105/0135-00 (M165, M166, M167, M169, M170, M171) share the same silicon and differ only in the metallization layers.
- Readout interface of the 7D15 counter plug-in