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RS-232发射机/接收机ISL83220E
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The Intersil ISL83220E is a 3.0V to 5.5V powered RS-232 transmitter/receiver which meets ElA/TIA-232 and V.28/V.24 specifications， even at VCC = 3.0V. Additionally， it provides ±15kV ESD protection （IEC61000-4-2 Air Gap and Human Body Model） on transmitter outputs and receiver inputs （RS-232 pins）。 Targeted applications are PDAs， Palmtops， and notebook and laptop computers where the low operational， and even lower standby， power consumption is critical. Efficient on-chip charge pumps， coupled with a manual powerdown function， reduce the standby supply current to a 1μA trickle. Small footprint packaging， and the use of small， low value capacitors ensure board space savings as well. Data rates greater than 250kbps are guaranteed at worst case load conditions. This family is fully compatible with 3.3V only systems， mixed 3.3V and 5.0V systems， and 5.0V only systems. Table 1 summarizes the features of the ISL83320E， while Application Note AN9863 summarizes the features of each device comprising the ICL32XXE 3V family.
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