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Maxim > Products > [Interface and Interconnect]  [Protection and Isolation] 
MAX1480A, MAX1480B, MAX1480C, MAX1490A, MAX1490B
Complete, Isolated RS-485/RS-422 Data Interface


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 2.1MB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX1480A/MAX1480B/MAX1480C/MAX1490A/ MAX1490B are complete, electrically isolated, RS-485/ RS-422 data-communications interface solutions in a hybrid microcircuit. Transceivers, optocouplers, and a transformer provide a complete interface in a standard DIP package. A single +5V supply on the logic side powers both sides of the interface.

The MAX1480B/MAX1480C/MAX1490B feature reducedslew- rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The MAX1480A/MAX1490A driver slew rate is not limited, allowing transmission rates up to 2.5Mbps. The MAX1480A/B/C are designed for half-duplex communication, while the MAX1490A/B feature full-duplex communication.

Drivers are short-circuit current limited and protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a highimpedance state. The receiver input has a fail-safe feature that guarantees a known output (RO-bar low for the MAX1480A/B/C, RO high for the MAX1490A/B/C) if the input is open circuit.

The MAX1480A/MAX1480B/MAX1480C/MAX1490A/ MAX1490B typically withstand 1600VRMS (1 minute) or 2000VRMS (1 second). Their isolated outputs meet all RS-485/RS-422 specifications. The MAX1480A/B/C are available in a 28-pin DIP package, and the MAX1490A/B are available in a 24-pin DIP package.

Key Features   Applications/Uses
  • For Integrated ESD Protection MAX1480E/MAX1490E: ±15kV ESD-Protected, Isolated RS-485/RS-422 Data Interfaces
  • For Space-Constrained Applications MAX3157: High CMRR, RS-485 Transceiver with ±50V Isolation

 
  		• Automated Test Equipment (ATE)
  		• HVAC/Building Control Networks
  		• Industrial-Control Local Area Networks
  		• Isolated RS-485/RS-422 Data Interface
  		• Transceivers for EMI-Sensitive Applications

    Key Specifications:  RS-422/485 Line Driver/Receivers
    Part Number Tx/Rx Duplex VSUPPLY
    (V)    		 Galvanic Isolation
    (±V)    		 ICC
    (mA)    		 Data Rate
    (kbps)    		 Tx EN Rx EN ICC (Shutdn.)
    (µA)    		 Rx/Tx on Bus Package/Pins Price
    typ min typ See Notes
    MAX1480A  1Tx + 1Rx Half 5 1000 60 2500 Yes No 0.2 128
    PDIP(W)/28
    		 $10.98 @1k
    MAX1480B  Half 35 250 Yes 128
    PDIP(W)/28
    		 $10.50 @1k
    MAX1480C  Half 35 250 Yes 128
    PDIP(W)/28
    		 $11.00 @1k
    MAX1490A  Full 100 2500 No 32
    PDIP(W)/24
    		 $10.98 @1k
    MAX1490B  Full 65 250 No 32
    PDIP(W)/24
    		 $10.50 @1k
    See All RS-422/485 Line Driver/Receivers (159)

    Diagram
    MAX1490A, MAX1490B: Pin Configuration
    Pin Configuration

    MAX1480A, MAX1480B, MAX1480C: Pin Configuration
    Pin Configuration

    Application Notes
  		• Application Note 2116: RS-485 Data Interface Gives Isolated, Full-Duplex Operation - MAX1480A, MAX1480B

    Design Guides
  		• Interface (PDF)

    Reliability Reports
  		• Reliability Report: MAX1490A.pdf
  		• Show FIT data for:
  		• Request Reliability Report 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: 1-20 of 20

    MAX1480A Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1480ACPI    
    		Active PDIP(W);28 pin;592.6 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28M-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1480ACPI+  
    		Active PDIP(W);28 pin;592.6 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28M+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1480AEPI    
    		Active PDIP(W);28 pin;592.6 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28M-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1480AEPI+  
    		Active PDIP(W);28 pin;592.6 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28M+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1480B Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1480BCPI    
    		Active PDIP(W);28 pin;592.6 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28M-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1480BCPI+  
    		Active PDIP(W);28 pin;592.6 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28M+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1480BEPI    
    		Active PDIP(W);28 pin;592.6 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28M-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1480BEPI+  
    		Active PDIP(W);28 pin;592.6 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28M+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1480C Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1480CCPI    
    		Active PDIP(W);28 pin;592.6 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28M-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1480CCPI+  
    		Active PDIP(W);28 pin;592.6 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28M+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1480CEPI    
    		Active PDIP(W);28 pin;592.6 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28M-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1480CEPI+  
    		Active PDIP(W);28 pin;592.6 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28M+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1490A Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1490ACPG    
    		Active PDIP(W);24 pin;512 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P24M-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1490ACPG+  
    		Active PDIP(W);24 pin;512 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P24M+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1490AEPG    
    		Active PDIP(W);24 pin;512 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P24M-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1490AEPG+  
    		Active PDIP(W);24 pin;512 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P24M+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1490B Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1490BCPG    
    		Active PDIP(W);24 pin;512 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P24M-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1490BCPG+  
    		Active PDIP(W);24 pin;512 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P24M+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1490BEPG    
    		Active PDIP(W);24 pin;512 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P24M-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1490BEPG+  
    		Active PDIP(W);24 pin;512 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P24M+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Notes and Comments
  		• Complete isolated RS-485 in one package

    More Information
  		• RS-485 Resources

    Related Products
    MAX1480E, MAX1490E ±15kV ESD-Protected, Isolated RS-485/RS-422 Data Interfaces

    More Like This: View Product Families for Similar Products

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    Document Ref.: 19-0259; Rev 5; 2005-06-08
    This page last modified: 2009-11-10


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