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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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Data Sheet
FULL DATA SHEET (PDF, 2.1MB)
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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 Number of Tx/Rx Duplex Supply Voltage (V) Galvanic Isolation (±V) Typ. ICC (mA) Data Rate (kbps) Tx EN Rx EN Typ. Shutdown ICC (µA) Number of Rx/Tx on Bus Package Price**
    MAX1480A  1Tx + 1Rx Half 5 1,000 60 2,500 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 2,500 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)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

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

    Evaluation Kits
    none

    Design Guides
  		• Interface (PDF)

    Reliability Reports
  		• 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
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1480ACPI    
    		PDIP(W);28 pin;593 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+  
    		PDIP(W);28 pin;593 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+  
    		PDIP(W);28 pin;593 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
    MAX1480AEPI    
    		PDIP(W);28 pin;593 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
    MAX1480B Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1480BCPI+  
    		PDIP(W);28 pin;593 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
    MAX1480BCPI    
    		PDIP(W);28 pin;593 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
    MAX1480BEPI+  
    		PDIP(W);28 pin;593 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
    MAX1480BEPI    
    		PDIP(W);28 pin;593 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
    MAX1480C Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1480CCPI+  
    		PDIP(W);28 pin;593 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
    MAX1480CCPI    
    		PDIP(W);28 pin;593 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
    MAX1480CEPI+  
    		PDIP(W);28 pin;593 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
    MAX1480CEPI    
    		PDIP(W);28 pin;593 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
    MAX1490A Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1490ACPG+  
    		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
    MAX1490ACPG    
    		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
    MAX1490AEPG    
    		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+  
    		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
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1490BCPG    
    		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+  
    		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    
    		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+  
    		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

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     Description 
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    Document Ref.: 19-0259; Rev 5; 2005-06-08
    This page last modified: 2007-05-29


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