MAX1480E, MAX1490E

±15kV ESD-Protected, Isolated RS-485/RS-422 Data Interfaces
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Status Explanations for product status codes

Active: In Production.

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.
 

Data Sheet

Download this datasheet in PDF formatDownload Rev 0 (PDF, 1.7MB)
Send this datasheet to any email addressE-Mail

Key Features

  • 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)
 

Applications/Uses

  • 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
   

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 Budgetary Price
typ min typ See Notes
MAX1480EA  1Tx + 1Rx Half 5 1000 85 2500 Yes No 0.2 128
PDIP(W)/28
 $11.23 @1k
MAX1480EC  Half 55 160 Yes 128
PDIP(W)/28
 $11.23 @1k
MAX1490EA  Full 130 2500 No 32
PDIP(W)/24
 $11.23 @1k
MAX1490EB  Full 65 160 No 32
PDIP(W)/24
 $11.23 @1k
See All RS-422/485 Line Driver/Receivers (165)
Pricing 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.


Diagram

MAX1480E: Pin Configuration
Pin Configuration

MAX1490E: Pin Configuration
Pin Configuration

Application Notes

Application Note 639   Maxim Leads the Way in ESD Protection
Application Note 651   ESD Protection for I/O Ports
Tutorial 736   RS-485 (EIA/TIA-485) Differential Data Transmission System Basics
Tutorial 763   Guidelines for Proper Wiring of an RS-485 (TIA/EIA-485-A) Network
Tutorial 2045   Understanding Common-Mode Signals
Application Note 2116   RS-485 Data Interface Gives Isolated, Full-Duplex Operation
Tutorial 4991   Oops...Practical ESD Protection vs. Foolhardy Placebos
Tutorial 4993   Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface

Product Guides

Interface (PDF)

Reliability Reports

Reliability Report: MAX1480E.pdf
Show FIT data for:
Request Reliability Report for:

Software/Models

none

Ordering Information

Filters: Part Number: Package: Temperature: Tape and Reel Sample
Part Number Free
Sample		 Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/Lead-Free?
Materials Analysis
MAX1480EACPI    
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
MAX1480EACPI+  
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
MAX1480EAEPI    
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
MAX1480EAEPI+  
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
MAX1480ECCPI    
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
MAX1480ECCPI+  
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
MAX1480ECEPI    
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
MAX1480ECEPI+  
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
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
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 See data sheet
Part Number Free
Sample		 Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/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
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 See data sheet
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
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 See data sheet
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
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 See data sheet

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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

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MAX1480A, MAX1480B, MAX1480C, ... Complete, Isolated RS-485/RS-422 Data Interface
See All RS-422/485 Line Driver/Receivers (165 Products)

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ESD Protection > RS-485/RS-422 Transceivers

Products with Similar Part Numbers

MAX1480A, MAX1480B, MAX1480C, ... Complete, Isolated RS-485/RS-422 Data Interface

More Information

New Product Press Release [ 2001-11-06 ]


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

 


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