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AAT4298 Datasheet(PDF) 9 Page - Advanced Analogic Technologies |
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AAT4298 Datasheet(HTML) 9 Page - Advanced Analogic Technologies |
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9 / 17 page  AAT4296/98 Five/Six Channel Push/Pull I/O Expander 4296.2006.02.1.1 9 Functional Description The AAT4296/98 is comprised of five/six push/pull output slew rate limited load switches primarily tar- geted for microcontroller general purpose input/output (I/O) expansion applications. Each push/pull output is supplied by the common V CC input and is controlled via the digital EN/SET input pin. When a given output is enabled, the voltage source applied to the VCC pin is then switched to the respective output. The high-side P-channel MOSFET transistor has a typical on resistance (R DS(ON)) of 3Ω when operating from a 3.6V supply. When a respective output is disabled or turned off, the given output pin is then connected to ground through a low side N-channel MOSFET with a typi- cal on resistance (R DS(ON)) of 2Ω. This circuit archi- tecture affects a simple logic control with the high level based on the applied V CC. For the AAT4296, this creates a 1-to-5 I/O expander, and for the AAT4298 this creates a 1-to-6 I/O expander. Both the AAT4296 and AAT4298 have been designed to operate with an input voltage range of 1.8V to 5.5V, making them ideal for battery-powered applications. Functional Block Diagram V CC GND OUT1 AAT4298 OUT2 OUT3 OUT4 OUT5 EN/SET S2Cwire Serial Interface OUT6 |
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