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Maxim > Products > [Interface and Interconnect]  [Protection and Isolation] 
MAX221E
±15kV ESD-Protected, +5V, 1µA, Single RS-232 Transceiver with AutoShutdown

Industry's Smallest, Low-Power, Single RS-232 Transceiver Featuring ±15kV ESD Protection


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 192kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX221E is a +5V powered, single transmit/receive RS-232 and V.28 communications interface with automatic shutdown/wake-up features and high data rate capabilities.

The MAX221E features enhanced electrostatic discharge (ESD) protection. Both the transmitter output and receiver input are protected to ±15kV using the IEC 1000-4-2 Air-Gap Discharge Method, to ±8kV using the IEC 1000-4-2 Contact Discharge Method, and to ±15kV using the Human Body Model.

The MAX221E achieves a low 1µA supply current with Maxim's revolutionary AutoShutdown™ feature. AutoShutdown saves power without changes to the existing BIOS or operating system by entering low-power shutdown mode when the RS-232 cable is disconnected or when the transmitter of the connected peripheral is off. The MAX221E wakes up and drives the active-low INVALID pin high when an active RS-232 cable is connected, signaling the host that a peripheral is connected to the communications port.

The MAX221E is available in a 16-pin SSOP package as well as a 16-pin TSSOP that uses 50% less board space than a 16-pin SO.

Key Features   Applications/Uses
  • Single RS-232 Transceiver in a Small 16-Pin TSSOP
  • 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 Saves Power without Changes to BIOS
  • Guaranteed 250kbps Data Rate

 
  		• Industrial Systems
  		• Maintenance/Diagnostic Ports
  		• Set-Top Boxes
  		• Telecommunications

    Key Specifications:  RS-232 Line Driver/Receivers
    Part Number VSUPPLY
    (V)    		 Tx Rx Data Rate
    (kbps)    		 ICC
    (mA)    		 Internal Charge Pump Ext. Caps Cap. Value
    (µF)    		 ESD Protect.
    (±kV)    		 Rx Active in Shutdn Package/Pins Price
    min typ nom See Notes
    MAX221E  5 1 1 250 5 Yes 4 0.1 15 1
    SSOP/16
    TSSOP/16
    		 $0.93 @1k
    See All RS-232 Line Driver/Receivers (152)

    Diagram
    MAX221E: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 739: Design Considerations for Data-Lump Cables - MAX221E
  		• Application Note 836: Selecting and using RS-232 Interface Parts for Your Power Supply Voltages - MAX221E
  		• Application Note 882: RS-232 Features Explained - MAX221E
  		• Application Note 2141: Determining Clock Accuracy Requirements for UART Communications - MAX221E

    Design Guides
  		• Interface (PDF)

    Reliability Reports
  		• Reliability Report: MAX221E.pdf
  		• Show FIT data 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: 1-16 of 16

    MAX221E Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX221ECAE    
    		Active SSOP;16 pin;50 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0106 (PDF)
    Use pkgcode/variation: A16-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX221ECAE-T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX221ECAE+  
    		Active SSOP;16 pin;50 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0106 (PDF)
    Use pkgcode/variation: A16+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX221ECAE+T    
    		Active SSOP;16 pin;50 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0106 (PDF)
    Use pkgcode/variation: A16+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX221EEAE    
    		Active SSOP;16 pin;50 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0106 (PDF)
    Use pkgcode/variation: A16-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX221EEAE-T    
    		Active SSOP;16 pin;50 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0106 (PDF)
    Use pkgcode/variation: A16-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX221EEAE+  
    		Active SSOP;16 pin;50 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0106 (PDF)
    Use pkgcode/variation: A16+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX221EEAE+T    
    		Active SSOP;16 pin;50 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0106 (PDF)
    Use pkgcode/variation: A16+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX221ECUE    
    		Active TSSOP;16 pin;33 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0117 (PDF)
    Use pkgcode/variation: U16-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX221ECUE-T    
    		Active TSSOP;16 pin;33 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0117 (PDF)
    Use pkgcode/variation: U16-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX221ECUE+  
    		Active TSSOP;16 pin;33 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0117 (PDF)
    Use pkgcode/variation: U16+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX221ECUE+T    
    		Active TSSOP;16 pin;33 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0117 (PDF)
    Use pkgcode/variation: U16+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX221EEUE    
    		Active TSSOP;16 pin;33 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0117 (PDF)
    Use pkgcode/variation: U16-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX221EEUE-T    
    		Active TSSOP;16 pin;33 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0117 (PDF)
    Use pkgcode/variation: U16-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX221EEUE+  
    		Active TSSOP;16 pin;33 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0117 (PDF)
    Use pkgcode/variation: U16+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX221EEUE+T    
    		Active TSSOP;16 pin;33 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0117 (PDF)
    Use pkgcode/variation: U16+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Notes and Comments
  		• Available in a 16-pin TSSOP package

    More Information
  		• New Product Press Release 1999-07-30 

    Related Products
    MAX221 +5V, 1µA, Single RS-232 Transceiver with AutoShutdown
    MAX3221, MAX3223, MAX3243 1µA Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown
    MAX3221E, MAX3223E, MAX3243E ±15kV ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps, RS-232 Transceivers with AutoShutdown
    MAX3224, MAX3225, MAX3226, MAX3227, MAX3244, MAX3245 1µA Supply Current, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus
    MAX3224E, MAX3225E, MAX3226E, MAX3227E, MAX3244E, MAX3245E ±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus

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    Document Ref.: 19-1527; Rev 0; 1999-08-01
    This page last modified: 2007-07-23


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