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Maxim > Products > [Interface and Interconnect]  [Protection and Isolation] 
MAX3185
±15kV ESD-Protected, EMC Compliant, 230kbps RS-232 Serial Port for Motherboards/Desktop PCs


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 65kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX3185 is a complete DTE RS-232 serial port designed to meet the stringent ESD requirements of the European community. All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge, and ±15kV using the Human Body Model.

The MAX3185 has three RS-232 transmitters, five RS-232 receivers, and no charge pump, optimizing it for operation in desktop PC and motherboard applications. It is guaranteed to run at data rates up to 230kbps, providing compatibility with popular software for communicating with personal computers. Power-supply current is less than 300µA for IDD and ISS, and less than 1mA for ICC.

The MAX3185 is pin and functionally compatible with the industry-standard 75185, so existing designs can instantly become EMC compliant. The MAX3185 is available in an SO package and in the tiny SSOP that further reduces board space.

Key Features   Applications/Uses
  • Enhanced ESD Protection:
    • ±15kV—Human Body Model
    • ±8kV—IEC 1000-4-2, Contact Discharge
    • ±15kV—IEC 1000-4-2, Air-Gap Discharge
  • Latchup Free During an ESD Event
  • 20-Pin SSOP and SO Packages
  • Guaranteed 230kbps Data Rate
  • Flow-Through Pinout
  • Pin Compatible with SN75C185
  • Complete DTE Serial Port

 
  		• Computers: Desktop, Workstation, Server
  		• Equipment Meeting IEC 1000-4-2
  		• Instruments
  		• Motherboards

    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)    		 Package/Pins Price
    min typ See Notes
    MAX3185 
    5
    12
    		 3 5 230 0.38 No 0 15
    SOIC(W)/20
    SSOP/20
    		 $1.23 @1k
    See All RS-232 Line Driver/Receivers (152)

    Diagram
    MAX3185: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 836: Selecting and using RS-232 Interface Parts for Your Power Supply Voltages - MAX3185, MAX3185

    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: 1-14 of 14

    MAX3185 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX3185CWP    
    		Active SOIC(W);20 pin;137 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3185CWP-T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX3185CWP+  
    		Active SOIC(W);20 pin;137 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3185CWP+T    
    		Active SOIC(W);20 pin;137 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3185EWP    
    		Active SOIC(W);20 pin;137 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0108 (PDF)
    Use pkgcode/variation: W20-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3185EWP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX3185CAP    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3185CAP-T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX3185CAP+  
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3185CAP+T    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3185EAP    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3185EAP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX3185EAP+  
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3185EAP+T    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Notes and Comments
    • Ideal for desktop PCs and motherboards

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    Document Ref.: 19-1076; Rev 0; 1996-09-01
    This page last modified: 2009-07-28


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