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MAX232EEWE 데이터시트(PDF) 8 Page - Maxim Integrated Products |
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MAX232EEWE 데이터시트(HTML) 8 Page - Maxim Integrated Products |
8 / 25 page 8 _______________________________________________________________________________________ ±15kV ESD-Protected, +5V RS-232 Transceivers V+ GND MAX206E MAX211E MAX213E MAX241E 0.1 µF* VCC 0.1 µF* R1 TO R5 T1 TO T5 0.1 µF* C1+ C1- C2+ C2- VCC +5.5V T_OUT R_OUT 400k Ω 5k Ω ISHDN 0V OR +5.5V DRIVE 0.1 µF* 0.1 µF* 3k Ω +5.5V R_IN T_IN CAPACITORS MAY BE POLARIZED OR UNPOLARIZED ( ) ARE FOR MAX213E * 1µF FOR MAX241E EN (EN) SHDN (SHDN) +5.5V (0V) V- +5.5V Figure 1. Shutdown-Current Test Circuit (MAX206E, MAX211E/MAX213E/MAX241E) +3.5V EN INPUT OUTPUT ENABLE TIME +2.5V RECEIVER OUTPUT CL = 150pF RECEIVER OUTPUTS OUTPUT DISABLE TIME VOH - 0.1V VOH VOL VOL + 0.1V RL = 1k Ω NOTE: POLARITY OF EN IS REVERSED FOR THE MAX213E +0.8V 0V +3V +3V EN INPUT 0V Figure 2. Receiver Output Enable and Disable Timing (MAX205E/MAX206E/MAX211E/MAX213E/MAX241E) 17 NAME FUNCTION V- T_OUT RS-232 Driver Outputs -2VCC Voltage Generated by the Charge Pump R_IN RS-232 Receiver Inputs 24 R_OUT TTL/CMOS Receiver Outputs. For the MAX213E, receivers R4 and R5 are active in shutdown mode when EN = 1. For the MAX211E and MAX241E, all receivers are inactive in shutdown. PIN 1, 2, 3, 28 4, 9, 18, 23, 27 EN T_IN TTL/CMOS Driver Inputs. Only the MAX211E, MAX213E, and MAX241E have internal pullups to VCC. Receiver Enable—Active High (MAX213E) GND Ground 25 VCC +4.5V to +5.5V Supply Voltage SHDN C1+, C1- Terminals for Positive Charge-Pump Capacitor 5, 8, 19, 22, 26 6, 7, 20, 21 10 Shutdown Control—Active Low (MAX213E) V+ +2VCC Voltage Generated by the Charge Pump C2+, C2- Terminals for Negative Charge-Pump Capacitor 11 12, 14 13 15, 16 EN Receiver Enable—Active Low (MAX211E, MAX241E) SHDN Shutdown Control—Active High (MAX211E, MAX241E) ________________________________________________Pin Descriptions (continued) MAX211E/MAX213E/MAX241E |
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