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The Tektronix M187  (P/N 155-0185-00) is a four-digit Counter, latch and D/A converter/DVM monolithic integrated circuit in a 20 pin DIP, designed by Don Larson.

The M187 contains a 4-decade BCD counter, latches, a multiplexer and a D/A converter that outputs a 10-level current interfacing directly with the 7000 series readout system.

When used with an integrator, comparator, and switchable current source, it forms a complete digital voltmeter.


Used in

Some instruments using part 155-0185-00

Instrument Manufacturer Class Model Description Introduced
7B15 Tektronix Plug-in 7B15 1 GHz delaying timebase 1978
7B85 Tektronix Plug-in 7B85 400 MHz delaying timebase 1976
7B87 Tektronix Plug-in 7B87 400 MHz time base for 7854 1981