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MAX250, MAX251
5V, Isolated, RS-232 Driver Receiver


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Data Sheet
FULL DATA SHEET (PDF, 428kB)
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Description
The MAX250 and MAX251 chip set form the heart of a complete, electronically isolated, RS-232 dual transmitter/receiver. By combining many functions on two chips, the cost and complexity required for an isolated digital interface is greatly reduced. Four low cost optocouplers, four capacitors, a diode and a small pot-core type transformer are all that are required to complete a 19.2k baud transceiver. Faster data rates are possible by using high speed optocouplers. In addition to the driving and receiving circuitry for the optocouplers, the chip set includes a push-pull transformer driver to supply power to the interface's isolated side.

Other convenient features include single +5V operation, a low power shutdown mode, and output enable control for three-state operation. The MAX250 and MAX251 are supplied in 14 lead DIP, 14 lead small outline and 20 leadless chip carrier packages.

The MAX252 has all the required components for RS-232 communication in a single package.

Key Features   Applications/Uses
  • Isolated Data Interface
  • Single +5V Supply
  • Uses Low Cost Optocouplers
  • 5µW Power Shutdown
  • 2 Transmitters and 2 Receivers

 
  • Bridge Ground Differentials
  • Data Links To Analog Circuits
  • High Noise Data Communications
  • Industrial Communications

    Key Specifications:   RS-232 Line Driver/Receivers
    Part Number Supply Voltage (V) Number of Tx Number of Rx Data Rate (kbps) Typ. ICC Current (mA) Internal Charge Pump Package Price**
    MAX250  5 2 2 116 0.1 Yes Ceramic DIP/14
    PDIP/14
    SOIC/14
    $3.20 @ 1k
    MAX251  $3.20 @ 1k
    See All RS-232 Line Driver/Receivers (144)
    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.

    Evaluation Kits
    none

    Design Guides
  • INTERFACE (PDF)

    Reliability Reports
  • Show FIT data for:
  • Reliability Report: MAX250xxD.pdf MAX251xxD.pdf

    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: 1-28 of 28

    MAX250 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX250EJD  
    Ceramic DIP;14 pin;
    Dwg: 21-0045 (PDF)
    Use pkgcode/variation: J14-3*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX250C/D  
    DICE SALES;

    Use pkgcode/variation: DICE*
    See data sheet
    MAX250EPD+  
    PDIP;10 pin;
    Dwg: 21-0043 (PDF)
    Use pkgcode/variation: P14+3*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX250CPD+  
    PDIP;10 pin;
    Dwg: 21-0043 (PDF)
    Use pkgcode/variation: P14+3*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX250CPD  
    PDIP;14 pin;
    Dwg: 21-0043 (PDF)
    Use pkgcode/variation: P14-3*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX250EPD  
    PDIP;14 pin;
    Dwg: 21-0043 (PDF)
    Use pkgcode/variation: P14-3*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX250CSD+  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX250CSD+T  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX250CSD-T  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14-2*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX250CSD  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14-1*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX250ESD-T  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX250ESD+T  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX250ESD+  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX250ESD  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX251 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX251EJD  
    Ceramic DIP;14 pin;
    Dwg: 21-0045 (PDF)
    Use pkgcode/variation: J14-3*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX251C/D  
    DICE SALES;

    Use pkgcode/variation: DICE*
    See data sheet
    MAX251EPD+  
    PDIP;10 pin;
    Dwg: 21-0043 (PDF)
    Use pkgcode/variation: P14+3*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX251CPD+  
    PDIP;10 pin;
    Dwg: 21-0043 (PDF)
    Use pkgcode/variation: P14+3*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX251CPD  
    PDIP;14 pin;
    Dwg: 21-0043 (PDF)
    Use pkgcode/variation: P14-3*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX251EPD  
    PDIP;14 pin;
    Dwg: 21-0043 (PDF)
    Use pkgcode/variation: P14-3*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX251CSD+T  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX251CSD-T  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14-2*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX251CSD  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14-2*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX251CSD+  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX251ESD+T  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX251ESD+  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX251ESD-T  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX251ESD  
    SOIC;14 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S14-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

    Notes and Comments
  • Isolated RS-232 chipset

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    Document Ref.: 19-1275; Rev 0; 1989-07-01
    This page last modified: 2007-06-01



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