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MAX485

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MAX485 的货源和报价
MAX485 的相关技术信息
   相关型号 MAX481ESA MAX483 MAX483CPA MAX483EPA MAX485CPA MAX485CPA+ MAX485CSA MAX485CSA+
Description
 
 

 

 

 

 

 

The MAX481, MAX483, MAX485, MAX487-MAX491, and MAX1487 are low-power transceivers for RS-485 and RS- 422 communication. Each part contains one driver and one receiver. The MAX483, MAX487, MAX488, and MAX489 feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX481, MAX485, MAX490, MAX491, and MAX1487 are not limited, allowing them to transmit up to 2.5Mbps.

These transceivers draw between 120µA and 500µA of supply current when unloaded or fully loaded with disabled drivers. Additionally, the MAX481, MAX483, and MAX487 have a low-current shutdown mode in which they consume only 0.1µA. All parts operate from a single 5V supply.

Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit.

The MAX487 and MAX1487 feature quarter-unit-load receiver input impedance, allowing up to 128 MAX487/ MAX1487 transceivers on the bus. Full-duplex communications are obtained using the MAX488-MAX491, while the MAX481, MAX483, MAX485, MAX487, and MAX1487 are designed for half-duplex applications.

Key Features   Applications
  • For Fault-Tolerant Applications MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4 Unit Load, +3.3V, RS-485 Transceiver MAX3440E-MAX3444E: ±15kV ESD-Protected, ±60V Fault-Protected, 10Mbps, Fail-Safe, RS-485/J1708 Transceivers
  • For Space-Constrained Applications MAX3460-MAX3464: +5V, Fail-Safe, 20Mbps, Profibus RS-485/RS-422 Transceivers MAX3362: +3.3V, High-Speed, RS-485/RS-422 Transceiver in a SOT23 Package MAX3280E-MAX3284E: ±15kV ESD-Protected, 52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422, True Fail-Safe Receivers MAX3293/MAX3294/MAX3295: 20Mbps, +3.3V, SOT23, RS-855/RS-422 Transmitters
  • For Multiple Transceiver Applications MAX3030E-MAX3033E: ±15kV ESD-Protected, +3.3V, Quad RS-422 Transmitters
  • For Fail-Safe Applications MAX3080-MAX3089: Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers
  • For Low-Voltage Applications MAX3483E/MAX3485E/MAX3486E/MAX3488E/ MAX3490E/MAX3491E: +3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited, True RS-485/RS-422 Transceivers

 
  		• Industrial-Control Local Area Networks
  		•  Level Translators
  		•  Low-Power RS-422 Transceivers
  		•  Low-Power RS-485 Transceivers
  		•  Transceivers for EMI-Sensitive Applications

    Key Specifications:   RS-422/485 Line Driver/Receivers
    Part Number Number of Tx/Rx Duplex Typ. ICC (mA) Data Rate (kbps) Tx EN Rx EN Typ. Shutdown ICC (µA) Number of Rx/Tx on Bus Rx Failsafe with Inputs: Features Supply Voltage (V) Slew Rate Limited Package Operating Temp. Range (°C) RoHS Available Price
    MAX1487  1Tx + 1Rx Half 0.3 2,500 Yes Yes  -  128 Open  -  5 No 8/PDIP
    8/SOIC
    8/uMAX     		0 to +70 -40 to +85 -55 to +125 Yes $1.25 @ 1k
    MAX481  Half 0.5 2,500 Yes Yes 0.1 32
    • Low Power Shutdown
    		 8/PDIP
    8/SOIC
    8/uMAX     		$1.25 @ 1k
    MAX483  Half 0.35 250 Yes Yes 0.1 32
    • Low Power Shutdown
    		 8/PDIP
    8/SOIC
    8/uMAX     		$1.50 @ 1k
    MAX485  Half 0.5 2,500 Yes Yes  -  32  -  8/PDIP
    8/SOIC
    8/uMAX     		$1.25 @ 1k
    MAX487  Half 0.25 250 Yes Yes 0.1 128
    • Low Power Shutdown
    		 8/PDIP
    8/SOIC
    8/uMAX     		$1.25 @ 1k
    MAX488  Full 0.12 250 No No  -  32  -  8/PDIP
    8/SOIC
    8/uMAX     		$1.25 @ 1k
    MAX489  Full 0.12 250 Yes Yes  -  32  -  14/PDIP
    14/SOIC     		$1.25 @ 1k
    MAX490  Full 0.3 2,500 No No  -  32  -  8/PDIP
    8/SOIC
    8/uMAX     		$1.25 @ 1k
    MAX491  Full 0.3 2,500 Yes Yes  -  32  -  14/PDIP
    14/SOIC     		$1.25 @ 1k

    Application Notes
  		• App Note 367: Explanation of Maxim RS-485 Features - MAX1487, MAX481, MAX485, MAX489
  		• App Note 723: Selecting and Using RS-232, RS-422, and RS-485 Serial Data Standards - MAX485
  		• App Note 2116: RS-485 Data Interface Gives Isolated, Full-Duplex Operation - MAX483, MAX485

    Notes and Comments
  		• MAX485 plus 1µA shutdown mode (MAX481)
  		• Slew-rate limiting reduces EMI and reflections (MAX483)
  		• Direct LTC485 replacement (MAX485)
  		• MAX483 plus 1/4-unit load (MAX487)
  		• Slew-rate limiting reduces EMI and reflections (MAX488)
  		• MAX488 plus driver/receiver enable (MAX489)
  		• Direct LTC490 replacement (MAX490)
  		• Direct LTC491 replacement (MAX491)

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