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Maxim > Products > [Interface and Interconnect]  [Protection and Isolation] 
MAX3233E, MAX3235E
±15kV ESD-Protected, 1µA, 250kbps, 3.3V/5V, Dual RS-232 Transceivers with Internal Capacitors


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 184kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX3233E/MAX3235E are EIA/TIA-232 and V.28/V.24 communications interfaces with automatic shutdown/wake-up features, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 Air-Gap Discharge, to ±8kV using IEC 1000-4-2 Contact Discharge, and to ±15kV using the Human Body Model. The MAX3233E operates from a +3.3V supply; the MAX3235E operates from +5.0V.

All devices achieve a 1µA supply current using Maxim's revolutionary AutoShutdown Plus™ feature. These devices automatically enter a low-power shutdown mode when the following two conditions occur: either the RS-232 cable is disconnected or the transmitters of the connected peripherals are inactive, and the UART driving the transmitter inputs is inactive for more than 30 seconds. They turn on again when they sense a valid transition at any transmitter or receiver input. AutoShutdown Plus saves power without changes to the existing BIOS or operating system.

The MAX3233E/MAX3235E have internal dual charge pumps requiring no external capacitors. Both transceivers have a proprietary low-dropout transmitter output stage that enables true RS-232 performance from a +3.0V to +3.6V supply for the MAX3233E or a +4.5V to +5.5V supply for the MAX3235E. These devices are guaranteed to operate up to 250kbps. Both are available in space-saving 20-pin wide SO or plastic DIP packages.

Key Features   Applications/Uses
  • ESD Protection for RS-232 I/O Pins
    • ±15kV—Human Body Model
    • ±8kV—IEC 1000-4-2, Contact Discharge
    • ±15kV—IEC 1000-4-2, Air-Gap Discharge
  • Latchup Free
  • 1µA Supply Current
  • AutoShutdown Plus-1997 EDN Magazine Innovation of the Year
  • Single-Supply Operation
    • +3.0V to +3.6V (MAX3233E)
    • +4.5V to +5.5V (MAX3235E)
  • 250kbps Guaranteed Data Rate
  • 6V/µs Guaranteed Slew Rate
  • Meets EIA/TIA-232 Specifications Down to 3.0V (MAX3233E)
  • Internal Charge-Pump Capacitors

 
  		• Battery-Powered Applications
  		• Cell Phones
  		• Embedded Systems
  		• Handheld Equipment
  		• Peripherals
  		• Subnotebook and Palmtop Computers

    Key Specifications:  RS-232 Line Driver/Receivers
    Part Number VSUPPLY
    (V)    		 Tx Rx Data Rate
    (kbps)    		 ICC
    (mA)    		 Internal Charge Pump Ext. Caps ESD Protect.
    (±kV)    		 Rx Active in Shutdn Package/Pins Price
    min typ See Notes
    MAX3233E  3.3 2 2 250 0.3 Yes 0 15 2
    PDIP(N)/20
    SOIC(W)/20
    		 $3.89 @1k
    MAX3235E  5
    PDIP(N)/20
    SOIC(W)/20
    		 $3.59 @1k
    See All RS-232 Line Driver/Receivers (152)

    Diagram
    MAX3233E, MAX3235E: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 739: Design Considerations for Data-Lump Cables - MAX3233E, MAX3235E
  		• Application Note 2141: Determining Clock Accuracy Requirements for UART Communications - MAX3233E, MAX3235E

    Design Guides
  		• Interface (PDF)

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
  		• MAX3233E IBIS Model
  		• MAX3235E IBIS Model

    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: 1-24 of 24

    MAX3233E Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX3233ECPP+G36  
    		Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20M+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3233EEPP+G36  
    		Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20M+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3233ECPP    
    		Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20M-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3233EEPP    
    		Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20M-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3233ECWP+TG36    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3233EEWP+TG36    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3233ECWP+G36    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3233EEWP+G36    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3233ECWP    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3233ECWP-T    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3233EEWP    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3233EEWP-T    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3235E Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX3235ECPP+G36  
    		Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20M+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3235EEPP+G36  
    		Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20M+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3235ECPP    
    		Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20M-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3235EEPP    
    		Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20M-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3235ECWP+TG36    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3235EEWP+TG36    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3235ECWP+G36  
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3235EEWP+G36    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3235ECWP    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3235ECWP-T    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3235EEWP    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3235EEWP-T    
    		Active SOIC(W);20 pin;138 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20M-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

    Notes and Comments
  		• ESD protection for RS-232 I/O pins, latchup free, AutoShutdown Plus, internal charge-pump capacitors
  		• Maximum reflow temperature is +225°C

    More Information
  		• New Product Press Release 1999-05-11 

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    Document Ref.: 19-1473; Rev 2; 2004-09-01
    This page last modified: 2007-07-20


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