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MAX3223ECTP+ Datasheet(PDF) 10 Page - Maxim Integrated Products |
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MAX3223ECTP+ Datasheet(HTML) 10 Page - Maxim Integrated Products |
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10 / 19 page  ESD protection can be tested in various ways; the trans- mitter outputs and receiver inputs of this product family are characterized for protection to the following limits: 1) ±15kV using the Human Body Model 2) ±8kV using the Contact Discharge Method specified in IEC1000-4-2 3) ±15kV using IEC1000-4-2’s Air-Gap Method E ES SD D T Te es stt C Co on nd diittiio on ns s ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results. H Hu um ma an n B Bo od dy y M Mo od de ell Figure 6a shows the Human Body Model, and Figure 6b shows the current waveform it generates when dis- charged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5k Ω resistor. IEC1000-4-2 The IEC1000-4-2 standard covers ESD testing and per- formance of finished equipment; it does not specifically refer to integrated circuits. The MAX3221E/ MAX3223E/ MAX3243E help you design equipment that meets V- VCC 0 V+ 0 VCC tINVL tWU INVALID REGION RECEIVER INPUT VOLTAGE (V) INVALID OUTPUT (V) tINVH TRANSMITTERS ENABLED, INVALID HIGH AUTOSHUTDOWN, TRANSMITTERS DISABLED, 1 µA SUPPLY CURRENT, INVALID LOW TRANSMITTERS ENABLED, INVALID HIGH -2.7V -0.3V +2.7V +0.3V 0 INDETERMINATE INDETERMINATE b) a) Figure 5. AutoShutdown Trip Levels FORCEON MASTER SHDN LINE 0.1 µF1MΩ FORCEOFF MAX3221E MAX3223E MAX3243E POWER- MANAGEMENT UNIT Figure 4. AutoShutdown with Initial Turn-On to Wake Up a Mouse or Another System FORCEOFF POWER DOWN INVALID FORCEON INVALID IS AN INTERNALLY GENERATED SIGNAL THAT IS USED BY THE AUTOSHUTDOWN LOGIC AND APPEARS AS AN OUTPUT OF THE DEVICE. POWER DOWN IS ONLY AN INTERNAL SIGNAL. IT CONTROLS THE OPERATIONAL STATUS OF THE TRANSMITTERS AND THE POWER SUPPLIES. Figure 3c. MAX32_ _E AutoShutdown Logic Table 2. INVALID Truth Table Low No High Yes INVALID OUTPUT RS-232 SIGNAL PRESENT AT ANY RECEIVER INPUT ±15kV ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps, RS-232 Transceivers with AutoShutdown 10 Maxim Integrated MAX3221E/MAX3223E/MAX3243E |
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