155-0019-00
The Tektronix 155-0019-00 (M027) is a Tek-made decimal point and spacing control chip in a 16-pin DIP, designed by Les Larson.
It consists of a decade counter, digital-to-analog converter, and input logic, and is used in the 7000 series readout system to produce a positioning signal (10-level staircase), and also to position the decimal point.