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MAX3238CAI-T Fiches technique(PDF) 4 Page - Maxim Integrated Products |
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MAX3238CAI-T Fiches technique(HTML) 4 Page - Maxim Integrated Products |
4 / 12 page ______________________________________________________________Pin Description 7.5 -5.0 -7.5 0 1000 3000 5000 TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE -2.5 5.0 LOAD CAPACITANCE (pF) 2000 4000 2.5 0 VOUT+ VOUT– FOR DATA RATES UP TO 250kbps 1 TRANSMITTER 250kbps 4 TRANSMITTERS 15.6kbps LOADED 3k Ω + CL 14 4 2 0 0 1000 3000 5000 SLEW RATE vs. LOAD CAPACITANCE 6 12 LOAD CAPACITANCE (pF) 2000 4000 10 8 +SLEW –SLEW 1 TRANSMITTER 250kbps 4 TRANSMITTERS 15.6kbps LOADED 3k Ω + CL 70 20 10 0 0 1000 3000 5000 SUPPLY CURRENT vs. LOAD CAPACITANCE WHEN TRANSMITTING DATA 30 60 LOAD CAPACITANCE (pF) 2000 4000 50 40 250kbps 120kbps 20kbps __________________________________________Typical Operating Characteristics (VCC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3k Ω, TA = +25°C, unless otherwise noted.) +3.0V to +5.5V, 1µA, up to 250kbps, True RS-232 Transceiver with AutoShutdown Plus 4 _______________________________________________________________________________________ Positive Terminal of Voltage-Doubler Charge-Pump Capacitor C1+ 28 +5.5V Generated by the Charge Pump V+ 27 +3.0V to +5.5V Supply Voltage VCC 26 NAME FUNCTION 1 C2+ Positive Terminal of Inverting Charge-Pump Capacitor 2 GND Ground PIN 3 C2- Negative Terminal of Inverting Charge-Pump Capacitor 4 V- -5.5V Generated by the Charge Pump 14 FORCEOFF Force-Off Input. Drive low to shut down transmitters, receivers (except R1OUTB), and on- board supply. This overrides AutoShutdown Plus and FORCEON (Table 1). 13 FORCEON Force-Off Input. Drive high to override AutoShutdown Plus, keeping transmitters and receivers on (FORCEOFF must be high) (Table 1). 8, 9, 11 R_IN RS-232 Receiver Inputs (R1IN–R3IN) 5, 6, 7, 10, 12 T_OUT RS-232 Transmitter Outputs (T1OUT–T5OUT) 25 C1- Negative Terminal of Voltage-Doubler Charge-Pump Capacitor 18, 20, 21 R_OUT TTL/CMOS Receiver Outputs (R3OUT–R1OUT) 17, 19, 22, 23, 24 T_IN TTL/CMOS Transmitter Inputs (T5IN–T1IN) 16 R1OUTB Noninverting Complementary Receiver Output. Always active. 15 INVALID Output of the Valid Signal Detector. A logic “1” indicates if a valid RS-232 level is present on receiver inputs. |
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Description similaire - MAX3238CAI-T |
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