256 Channel Multiplexer for Sunworm
The 256 channel multiplexer we are using is based on a design given to us
by Analyx Systems Inc. It was designed to interface directly with their
A/D card and use the clocking signals from it. We have built two units,
using wire-wrap due to the cost of developing a PCB for only two units.
The following drawings are available and I hope they are legible since
they are edited scans of copies.
- 256 ch Multiplexer, 1 of 2(53K)
- 256 ch Multiplexer, 2 of 2(48K)
All ICs labeled 74Fxx must be the 'F' series as some of the clocking and
reset signals are very fast (40ns) and the mux will lose sync if not.
The number of channels select switch is a hex switch, so the number of
channels selected are in sets of 16. (16,32,48...etc..256)
