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Boolean Logic

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The CGS405 comprises four boolean logic elements:-

  • NOT - this is a basic inverter. If you apply a LOW (e.g. a gate output in its OFF state) it will give a HIGH (gate ON) output, and vice versa.
  • The OR gate has two inputs, and gives a HIGH whenever one or both inputs are HIGH.
  • The AND gate has two inputs, and gives a HIGH only when both inputs are HIGH.
  • The Exclusive OR gate (XOR), gives a LOW when both inputs are within 1.2 volts of each other, and a HIGH when they are not.

The OR, AND and XOR also offer inverted outputs, giving the option of using them as NOR, NAND and XNOR gates. Unlike the Analog Logic module, these are for processing gate, trigger and clock signals, although the XOR gate can accept linear inputs as well.

In builds where you are replacing the CGS36 and do not have an additional 1" slot, the CGS405 can be stacked ontop of the CGS336.


PCB Dimensions: 1" x 6" with 3.2mm fixing points 0.15" from the edges
Power Consumption: +12V @ -12V @
Email:  elby-designs@bigpond.com
© Copyright 2000. All rights reserved.     Revised: March 20, 2021