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


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 1.7MB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX1480EA/MAX1480EC/MAX1490EA/MAX1490EB are complete, electrically isolated, RS-485/RS-422 data communications interface solutions in a hybrid microcircuit. The RS-485/RS-422 I/O pins are protected against ±15kV electrostatic discharge (ESD) shocks, without latchup. 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 MAX1480EC/MAX1490EB feature reduced-slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 160kbps. The MAX1480EA/MAX1490EA driver slew rate is not limited, allowing transmission rates up to 2.5Mbps. The MAX1480EA/MAX1480EC are designed for half-duplex communication, while the MAX1490EA/MAX1490EB 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 high-impedance state. The receiver input has a fail-safe feature that guarantees a known output (RO low for the MAX1480EA/MAX1480EC, active-low RO high for the MAX1490EA/ MAX1490EB) if the input is open circuit.

The MAX1480EA/MAX1480EC/MAX1490EA/MAX1490EB withstand 1260VRMS (1min) or 1520VRMS (1s). Their isolated outputs meet all RS-485/RS-422 specifications. The MAX1480EA/MAX1480EC are available in a 28-pin DIP package, and the MAX1490EA/MAX1490EB are available in a 24-pin DIP package.

Key Features   Applications/Uses
  • Isolated Data Interface, Guaranteed to 1260VRMS (1min)
  • +15kV ESD Protection on I/O Pins
  • Slew-Rate Limited for Errorless Data Transmission (MAX1480EC/MAX1490EB)
  • High-Speed, Isolated, 2.5Mbps RS-485/RS-422 Interface (MAX1480EA/MAX1490EA)
  • Full-Duplex Data Communication
    • (MAX1490EA/MAX1490EB)
  • Single +5V Supply
  • Current Limiting and Thermal Shutdown for Driver Overload Protection
  • Standard 0.6in DIP Packages
    • 28-Pin DIP (MAX1480EA/MAX1480EC)
    • 24-Pin DIP (MAX1490EA/MAX1490EB)

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

    Diagram
    MAX1480E: Pin Configuration
    Pin Configuration

    MAX1490E: Pin Configuration
    Pin Configuration

    Application Notes
  		• Application Note 639: Maxim Leads the Way in ESD Protection - MAX1480E, MAX1490E
  		• Application Note 651: ESD Protection for I/O Ports - MAX1480E, MAX1490E
  		• Application Note 736: RS-485 (EIA/TIA-485) Differential Data Transmission System Basics - MAX1480E, MAX1490E
  		• Application Note 763: Guidelines for Proper Wiring of an RS-485 (TIA/EIA-485-A) Network - MAX1480E, MAX1490E
  		• Application Note 2045: Understanding Common-Mode Signals - MAX1480E
  		• Application Note 2116: RS-485 Data Interface Gives Isolated, Full-Duplex Operation - MAX1480E, MAX1480E

    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: 1-16 of 16

    MAX1480E Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1480EACPI    
    		Active 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
    MAX1480ECCPI    
    		Active 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
    MAX1480EACPI+  
    		Active 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
    MAX1480ECCPI+  
    		Active 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
    MAX1480EAEPI    
    		Active 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
    MAX1480ECEPI    
    		Active 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
    MAX1480EAEPI+  
    		Active 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
    MAX1480ECEPI+  
    		Active 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
    MAX1490E Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1490EACPG    
    		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
    MAX1490EBCPG    
    		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
    MAX1490EACPG+  
    		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
    MAX1490EBCPG+  
    		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
    MAX1490EAEPG    
    		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
    MAX1490EBEPG    
    		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
    MAX1490EAEPG+  
    		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
    MAX1490EBEPG+  
    		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

    More Information
  		• New Product Press Release 2001-11-06 

    Related Products
    MAX1480A, MAX1480B, MAX1480C, MAX1490A, MAX1490B Complete, Isolated RS-485/RS-422 Data Interface

    More Like This: View Product Families for Similar Products

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    Document Ref.: 19-1940; Rev 0; 2001-10-31
    This page last modified: 2009-10-15


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