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Maxim > Products > [Interface and Interconnect] 
MAX1481, MAX1484, MAX1485, MAX1486
Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 392kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX1481/MAX1484/MAX1485/MAX1486 provide software-selectable, half-/full-duplex, low-power, slew-rate- limited, and high-speed (12Mbps) RS-485/RS-422 operation in a 10-pin µMAX® package—the smallest 10-pin package available.

The software-selectable, half-/full-duplex MAX1485/MAX1486 make obsolete the normally larger and more expensive solutions required for selectable half-/full-duplex RS-485/RS-422 operation: 1) a 14-pin, full-duplex transceiver configured via jumpers between receiver and transmitter lines, or 2) two 8-pin, half-duplex transceivers, which require an additional inverter logic gate for software selectability.

The MAX1481/MAX1484 are functionally equivalent to the industry-standard MAX491 and 75180, and are designed for space-constrained, full-duplex RS-422 applications.

All parts contain one driver and one receiver and feature a 1/8-unit-load receiver input impedance, allowing up to 256 transceivers on the bus. The MAX1481/MAX1485 feature reduced-slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. The MAX1484/MAX1486 driver slew rates are not limited, allowing them to transmit up to 12Mbps.

The MAX1481/MAX1484/MAX1485/MAX1486 draw only 300µA of supply current. The MAX1481 has a low-power shutdown mode that reduces supply current to only 0.1µA. All devices operate from a single 5V supply.

Drivers are output 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.

Key Features   Applications/Uses
  • 10-Pin µMAX Package: Smallest 10-Pin Package
  • Software-Selectable Half-/Full-Duplex Operation (MAX1485/MAX1486)
  • 0.1µA Low-Current Shutdown Mode (MAX1481)
  • Slew-Rate Limiting Allows Error-Free Data Transmission (MAX1481/MAX1485)
  • 12Mbps High-Speed Operation (MAX1484/MAX1486)
  • Allow up to 256 Transceivers on the Bus

 
  		• Battery-Powered Applications
  		• Handheld Equipment
  		• Industrial Control Local Area Networks
  		• Level Translators
  		• Low-Power RS-422/RS-485 Communications
  		• Transceivers for EMI-Sensitive Applications

    Diagram
    MAX1481, MAX1484: Pin Configuration
    Pin Configuration

    MAX1485, MAX1486: Pin Configuration
    Pin Configuration

    Application Notes
  		• Application Note 367: Explanation of Maxim RS-485 Features - MAX1485, MAX1486

    Design Guides
  		• Interface (PDF)

    Reliability Reports
  		• Reliability Report: MAX1481.pdf MAX1484.pdf MAX1485.pdf MAX1486.pdf
  		• Show FIT data for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-32 of 32

    MAX1481 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1481CUB    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1481CUB-T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1481CUB+  
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1481CUB+T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1481EUB    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1481EUB-T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1481EUB+  
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1481EUB+T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1484 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1484CUB    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1484CUB-T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1484CUB+  
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1484CUB+T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1484EUB    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1484EUB-T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1484EUB+  
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1484EUB+T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1485 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1485CUB    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1485CUB-T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1485CUB+  
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1485CUB+T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1485EUB    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1485EUB-T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1485EUB+  
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1485EUB+T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1486 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1486CUB    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1486CUB-T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1486CUB+  
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1486CUB+T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1486EUB    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1486EUB-T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1486EUB+T    
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1486EUB+  
    		Active µMAX;10 pin;15 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Notes and Comments
    • Slew-rate limiting reduces EMI and reflections (MAX1481)
    • 12Mbps, 1/8 unit loads (MAX1484)
    • Sofware-selectable Half/Full Duplex (MAX1485)
    • 12Mbps, sofware-selectable Half/Full Duplex (MAX1486)

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    Document Ref.: 19-1312; Rev 1; 2006-12-20
    This page last modified: 2009-11-05


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