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Maxim > Products > [Interface and Interconnect] 
MAX221
+5V, 1µA, Single RS-232 Transceiver with AutoShutdown

Industry's Smallest, Low-Power Single RS-232 Transceiver


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 120kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX221 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 MAX221 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 MAX221 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 MAX221 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. For an equivalent RS-232 transceiver with enhanced ±15kV ESD protection, refer to the MAX221E data sheet.

Key Features   Applications/Uses
  • Single RS-232 Transceiver in a Small 16-Pin TSSOP Package
  • 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)    		 Rx Active in Shutdn Package/Pins Price
    min typ nom See Notes
    MAX221  5 1 1 250 5 Yes 4 0.1 1
    SSOP/16
    TSSOP/16
    		 $0.85 @1k
    See All RS-232 Line Driver/Receivers (152)

    Diagram
    MAX221: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 2141: Determining Clock Accuracy Requirements for UART Communications - MAX221

    Design Guides
  		• Interface (PDF)

    Reliability Reports
  		• Reliability Report: MAX221.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

    MAX221 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX221CAE    
    		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
    MAX221CAE-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: No
    Materials Analysis
    MAX221CAE+  
    		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
    MAX221CAE+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
    MAX221EAE    
    		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
    MAX221EAE-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX221EAE+  
    		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
    MAX221EAE+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX221EUE+  
    		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
    MAX221EUE+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
    MAX221CUE    
    		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
    MAX221CUE-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
    MAX221CUE+  
    		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
    MAX221CUE+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
    MAX221EUE    
    		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
    MAX221EUE-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

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

    Related Products
    MAX221E ±15kV ESD-Protected, +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.: 19-4323; Rev 0; 2000-05-01
    This page last modified: 2007-06-04


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