Analog switch is over-voltage tolerant for USB switching
19 November 2003
Analogue, Mixed Signal, LSI
ON Semiconductor has broken new ground by introducing its NLAS2066 - an ultra small analog switch that it claims is the industry's first over-voltage tolerant switch. This innovative device permits input lines, output lines and USB lines to be shared on the same connector pins, thus reducing the size and lowering the costs for handheld products.
The NLAS2066 is a dual single pole single throw (SPST) switch. Its over-voltage tolerance and low Ron resistance enable it to be used to isolate USB lines - permitting the sharing of these lines with standard I/O lines. Because the device can withstand the USB requirement of up to 5,5 V for 24 hours - regardless of operating voltage - the device meets the full USB specification.
The NLAS2066 may be operated at a low voltage, eliminating the need for an otherwise redundant 5,0 V power supply. The reduction in the required number of pins connected to the outside world and the number of power supplies required reduces the cost of manufacturing a USB-enabled system.
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