MAX3485 Maxim Integrated Products, MAX3485 Datasheet
MAX3485
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MAX3485 Summary of contents
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... EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The par- tially slew-rate-limited MAX3486 transmits up to 2.5Mbps. The MAX3485, MAX3490, and MAX3491 transmit 10Mbps. Drivers are short-circuit current limited and are protect- ed against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state ...
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Slew-Rate-Limited True RS-485/RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) ...............................................................7V CC Control Input Voltage (RE, DE) ...................................-0. Driver Input Voltage (DI) .............................................-0. Driver Output Voltage ( Z)..........................-7.5V to 12.5V ...
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... Driver Propagation Delay Skew (Note 2) PLH PHL DRIVER OUTPUT ENABLE/DISABLE TIMES (MAX3485/MAX3491 only) Driver Output Enable Time to Low Level Driver Output Enable Time to High Level Driver Output Disable Time from High Level Driver Output Disable Time from Low Level Driver Output Enable Time from Shutdown to Low Level Driver Output Enable Time from Shutdown to High Level DRIVER SWITCHING CHARACTERISTICS— ...
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... Figure 12, L MAX3483/MAX3485/MAX3486/MAX3491 only C = 15pF, Figure 12, L MAX3483/MAX3485/MAX3486/MAX3491 only C = 15pF, Figure 12, L MAX3483/MAX3485/MAX3486/MAX3491 only C = 15pF, Figure 12, L MAX3483/MAX3485/MAX3486/MAX3491 only C = 15pF, Figure 12, L MAX3483/MAX3485/MAX3486/MAX3491 only C = 15pF, Figure 12, L MAX3483/MAX3485/MAX3486/MAX3491 only and V , respectively, when the DI input changes state and t ( (Z) PLH PHL ...
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Slew-Rate-Limited __________________________________________Typical Operating Characteristics (V = 3.3V +25°C, unless otherwise noted OUTPUT CURRENT vs. RECEIVER OUTPUT LOW VOLTAGE 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT LOW ...
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... Slew-Rate-Limited True RS-485/RS-422 Transceivers _____________________________Typical Operating Characteristics (continued) SUPPLY CURRENT vs. TEMPERATURE 1.2 1.1 1 0.9 0.8 0.7 -40 - TEMPERATURE (°C) ______________________________________________________________Pin Description PIN MAX3483/ MAX3488/ MAX3485/ MAX3491 MAX3490 MAX3486 — — — — ...
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... Slew-Rate-Limited TOP VIEW GND DIP/SO Figure 1. MAX3483/MAX3485/MAX3486 Pin Configuration and Typical Operating Circuit TOP VIEW GND 4 D DIP/SO Figure 2. MAX3488/MAX3490 Pin Configuration and Typical Operating Circuit TOP VIEW N ...
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Slew-Rate-Limited True RS-485/RS-422 Transceivers Figure 4. Driver V and (+) Figure 6. Receiver V and GENERATOR ...
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Slew-Rate-Limited D GENERATOR (NOTE Figure 8. Driver Propagation Times 50pF L (NOTE 5) GENERATOR (NOTE Figure ...
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Slew-Rate-Limited True RS-485/RS-422 Transceivers GENERATOR (NOTE 4) 50 1.5V 0V Figure 11. Receiver Propagation Delay S3 1.5V -1.5V GENERATOR (NOTE 4) IN 1.5V t PRZH t PRSH OUT 1.5V IN 1.5V t PRHZ OUT ...
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... Inputs Open 10dB/div 0Hz 500kHz/div Figure 13. Driver Output Waveform and FFT Plot of MAX3485/ MAX3490/MAX3491 Transmitting a 125kHz Signal ______________________________________________________________________________________ True RS-485/RS-422 Transceivers __________Applications Information The MAX3483/MAX3485/MAX3486/MAX3488/MAX3490/ MAX3491 are low-power transceivers for RS-485 and RS-422 communications. The MAX3483 and MAX3488 can transmit and receive at data rates up to 250kbps, the MAX3486 ...
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... Slew-Rate-Limited True RS-485/RS-422 Transceivers DI 2V/div Z 1V/div Y 1V/div 20ns/div Figure 15. MAX3485/MAX3490/MAX3491 Driver Propagation Delay DI 2V/div Z 1V/div Y 1V/div 1 s/div Figure 17. MAX3483/MAX3488 Driver Propagation Delay DI 5V/div 2V/div RO 5V/div 2 s/div Figure 19. MAX3483/MAX3488 System Differential Voltage at 125kHz Driving 4000 ft of Cable ...
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... The receiver skew time PRLH (20ns for the MAX3483/MAX3488). The driver skew times are 8ns for the MAX3485/MAX3490/MAX3491, 11ns for the MAX3486, and typically under 100ns for the MAX3483/MAX3488. ______________________________________________________________________________________ True RS-485/RS-422 Transceivers ...
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Slew-Rate-Limited True RS-485/RS-422 Transceivers A 120 120 NOTE: RE AND DE ON MAX3491 ONLY. Figure 22. MAX3488/MAX3490/MAX3491 Full-Duplex RS-485 Network A RO 120 ...
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Slew-Rate-Limited _Ordering Information (continued) PART TEMP. RANGE MAX3486CPA 0°C to +70°C MAX3486CSA 0°C to +70°C MAX3486C/D 0°C to +70°C MAX3486EPA -40°C to +85°C MAX3486ESA -40°C to +85°C MAX3488CPA 0°C to +70°C MAX3488CSA 0°C to +70°C MAX3488C/D 0°C ...
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... Maxim reserves the right to change the circuitry and specifications without notice at any time. implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 16 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 16 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © ...