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MAX232EIDWRG4 Folha de dados(PDF) 9 Page - Texas Instruments |
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MAX232EIDWRG4 Folha de dados(HTML) 9 Page - Texas Instruments |
9 / 27 page RX TX POWER 5 V DIN ROUT DOUT RS-232 RIN RS-232 2 2 250 kb/s IEC61000-4-2 2 2 Copyright © 2016, Texas Instruments Incorporated 9 MAX232E www.ti.com SLLS723C – APRIL 2006 – REVISED AUGUST 2016 Product Folder Links: MAX232E Submit Documentation Feedback Copyright © 2006–2016, Texas Instruments Incorporated 8 Detailed Description 8.1 Overview The MAX232E device is a dual driver and receiver that includes a capacitive voltage generator using four capacitors to supply TIA/EIA-232-F voltage levels from a single 5-V supply. All RS-232 pins have 15-kV HBM and IEC61000-4-2 Air-Gap discharge protection. RS-232 pins also have 8-kV IEC61000-4-2 contact discharge protection. Each receiver converts TIA/EIA-232-F inputs to 5-V TTL/CMOS levels. These receivers have shorted and open fail safe. The receiver can accept up to ±30-V inputs and decode inputs as low as ±3 V. Each driver converts TTL/CMOS input levels into TIA/EIA-232-F levels. Outputs are protected against shorts to ground. 8.2 Functional Block Diagram Figure 8. Logic Diagram (Positive Logic) 8.3 Feature Description 8.3.1 Power The power block increases and inverts the 5-V supply for the RS-232 driver using a charge pump that requires four 1-µF external capacitors. 8.3.2 RS-232 Driver Two drivers interface standard logic level to RS-232 levels. Internal pullup resistors on DIN inputs ensures a high input when the line is high impedance. 8.3.3 RS-232 Receiver Two receivers interface RS-232 levels to standard logic levels. An open or shorted to ground input results in a high output on ROUT. |
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Descrição semelhante - MAX232EIDWRG4 |
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