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RS-232 transceiver for portable applications

Based on a Labs project | October 2011 | Find it here
RS-232 transceiver for portable applications
The ADM101E is a single-channel RS-232 driver and receiver in the Analog Devices Craft Port™ series, designed to operate from a single +5 V supply. A highly efficient charge-pump voltage inverter generates an on-chip –5 V supply, which eliminates the need for a negative power supply for the driver, and permits RS-232 compatible output levels to be developed using chargepump capacitors as small as 0.1 µF.
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