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MAX232

MAX232, MAX232A

+5V-Powered, Multichannel RS-232 Drivers/Receivers

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Overview

Description

The MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communications interfaces, particularly applications where ±12V is not available..

The MAX225, MAX233, MAX235, and MAX245/MAX246/MAX247 use no external components and are recommended for applications where printed circuit board space is critical.

The MAX220–MAX249 are offered in 26 different packages with temperatures from 0 to +70°C up to -55°C to +125°C. See ordering information table at the end of the data sheet for all package and temperature options.

MAX220, MAX232, MAX232A: Pin Configuration and Typical Operating Circuit MAX220, MAX232, MAX232A: Pin Configuration and Typical Operating Circuit Enlarge+

Key Features

  • Saves Board Space
  • Integrated Charge Pump Circuitry
    • Eliminates the Need for a Bipolar ±12V Supply
    • Enables Single Supply Operation from +5V Supply
  • Integrated Capacitors (MAX223, MAX233, MAX235, MAX245–MAX247)
  • Saves Power for Reduced Power Requirements
  • 5µW Shutdown Mode

Applications/Uses

  • Interface Translation
  • Multidrop RS-232 Networks
  • Portable Diagnostics Equipment

Parametric Specs

See parametric specs for RS-232 Line Driver/Receivers (136)


Part NumberVSUPPLY
(V)		TxRxData Rate
(kbps)		ICC
(mA)		Internal Charge PumpExternal CapsCap. Value
(µF)		Rx Active in ShutdnPackage/PinsBudgetary
Price
mintypnomSee Notes
MAX220 5221200.5Yes40.1-
CDIP/16
PDIP/16
SOIC (N)/16
SOIC (W)/16
$3.63 @1k
MAX222 5222004Yes40.10
CDIP/18
DICE SALES/N
LCC/20
PDIP/18
SOIC (W)/18
$2.66 @1k
MAX223 5451207Yes412
SOIC (W)/28
SSOP/28
$2.93 @1k
MAX230 5501207Yes41-
CDIP/20
PDIP/20
SOIC (W)/20
$4.62 @1k
MAX231 
5
12
221200.4No21-
CDIP/14
PDIP/14
SOIC (W)/16
$2.72 @1k
MAX232 5221205Yes41-
CDIP/16
DICE SALES/N
FPCK/16
LCC/20
PDIP/16
SOIC (N)/16
SOIC (W)/16
TSSOP/16
$2.04 @1k
MAX232A 5222004Yes40.1-
SOIC(N)/8
$3.01 @1k
MAX233 5221205Yes0--
PDIP HYBRID/20
$4.85 @1k
MAX233A 5222004Yes0--
PDIP HYBRID/20
SOIC HYBRID (W)/20
$6.61 @1k
MAX234 5401207Yes41-
CDIP/16
DICE SALES/N
PDIP/16
SOIC (W)/16
$2.72 @1k
MAX236 5431207Yes41-
CDIP/24
PDIP/24
SOIC (W)/24
$4.77 @1k
MAX237 5531207Yes41-
CDIP/24
PDIP/24
SOIC (W)/24
$4.95 @1k
MAX238 5441207Yes41-
CDIP/24
DICE SALES/N
PDIP/24
SOIC (W)/24
$2.43 @1k
MAX239 
5
12
351200.4No21-
PDIP/24
SOIC (W)/24
$2.43 @1k
MAX240 5551207Yes41-
MQFP/44
$5.78 @1k
MAX241 5451207Yes41-
SOIC (W)/28
SSOP/28
$2.93 @1k
MAX242 5222004Yes40.12
CDIP/18
DICE SALES/N
PDIP/18
SOIC (W)/18
SSOP/20
$2.66 @1k
MAX243 5222004Yes40.1-
CDIP/16
PDIP/16
SOIC (N)/16
SOIC (W)/16
$3.63 @1k
MAX244 581012011Yes41-
DICE SALES/N
PLCC/44
$9.43 @1k
MAX248 58812011Yes418
DICE SALES/N
PLCC/44
$21.67 @1k
MAX249 561012011Yes4110
PLCC/44
$8.25 @1k

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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

Technical Documents

App Note 4223 The Evolution of the RS-232 Transceivers
App Note 3580 Redundant-Transceiver RS-232 Link Has ±40V Overvoltage Protection
App Note 3024 IrDA and RS-232: A Match Made in Silicon
Tutorial 2141 Determining Clock Accuracy Requirements for UART Communications
Tutorial 2020 Choosing the Right RS-232 Transceiver
Tutorial 1834 Lower the Supply Current in Your RS-232 System
Tutorial 723 Selecting and Using RS-232, RS-422, and RS-485 Serial Data Standards

Additional Resources

RS-232 Resources ›

Tools & Models

  • MAX16155 IBIS Model
  • MAX232 IBIS Model

    •

    Quality And Environmental

    Product Reliability Reports: MAX232A.pdf  MAX232.pdf 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

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