Printer port activates CMOS switches

Posted on Aug 24, 2012

The cost-effective design in Figure 1 provides control for CMOS switches without the need for an external power supply. Analog switches such as those in the MAX4663 are ideal for use in low-distortion applications. They are preferable to electromechanical relays in automatic test equipment or other applications in which you need current switching. The CMOS switches use lower power, consume less board space, and are more reliable than electromechanical relays.

The MAX4663 quad switch features 2.5 maximum on-resistance, 5-nA maximum leakage current at 85°C, and 56-dB off-state isolation at 1 MHz. They also offer break-before-make switching. The switches operate from a 4.5 to 36V supply or fr

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