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Maxim > Products > [Interface and Interconnect] 
MAX3322E, MAX3323E
±15kV ESD-Protected, RS-232 Transceivers for Multidrop Applications

±15kV ESD-Protected, RS-232 Transceivers for Multidrop Applications


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 336kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX3322E/MAX3323E 3.0V to 5.5V powered EIA/TIA-232 and V.28/V.24 communications interfaces are designed for multidrop applications with low power requirements, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection. All RS-232 inputs and outputs are protected to ±15kV using the IEC 1000-4-2 Air-Gap Discharge method, ±8kV using the IEC 1000-4-2 Contact Discharge method, and ±15kV using the Human Body Model.

The MAX3322E/MAX3323E have pin-selectable 5kΩ /high-impedance RS-232 receivers. These devices are capable of receiving data in high-impedance mode. In multidrop applications, one receiver has a 5kΩ input resistance, while the other receivers are high impedance to ensure the RS-232 standard is observed. Logic control permits selection of the functional mode: high impedance or RS-232 standard load. The transmitters are enabled by logic control to allow the multiplexing of the inputs to a single UART.

A proprietary low-dropout transmitter output stage enables true RS-232 performance from a 3.0V to 5.5V supply with a dual charge pump. The charge pump requires only four small 0.1µF capacitors for operation from a 3.3V supply. The MAX3322E/MAX3323E are capable of running at data rates up to 250kbps while maintaining RS-232-compliant output levels. The MAX3322E/MAX3323E have a unique VL pin that allows operation in mixed-logic voltage systems. Both input and output logic levels are pin programmable through the VL pin.

The MAX3322E is a 2Tx/2Rx device for hardware handshaking in standard RS-232 mode, and the MAX3323E is a 1Tx/1Rx, required in most multidrop applications.

The MAX3322E is offered in a space-saving TSSOP package. The MAX3323E is offered in 16-pin DIP and space-saving TSSOP packages.

Key Features   Applications/Uses
  • Pin-Selectable 5kΩ/High-Impedance Receivers
  • Transmitter Outputs Three-Stated by Logic Control
  • VL Pin for Compatibility with Mixed Voltage Systems
  • 1Tx/1Rx (MAX3323E) or 2Tx/2Rx (MAX3322E) Versions
  • 250kbps Data Rate
  • 1µA Low-Power Shutdown
  • High 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

 
  		• Bar-Code Scanners
  		• Data Splitters
  		• Industrial Data Acquisition
  		• Video Security

    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
    MAX3322E 
    3
    3.3
    5
    		 2 2 250 1 Yes 5 0.1 15 0
    TSSOP/20
    		 $2.90 @1k
    MAX3323E  1 1
    PDIP(N)/16
    TSSOP/16
    		 $2.07 @1k
    See All RS-232 Line Driver/Receivers (152)

    Diagram
    MAX3322E, MAX3323E: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 4562: FAQs about Interface, RS-232, and RS-485 Circuits - MAX3323E

    Design Guides
  		• Interface (PDF)

    Reliability Reports
  		• Reliability Report: MAX3322E.pdf MAX3323E.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: 1-10 of 10

    MAX3322E Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX3322EEUP    
    		Active TSSOP;20 pin;45 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3322EEUP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX3322EEUP+  
    		Active TSSOP;20 pin;45 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3322EEUP+T    
    		Active TSSOP;20 pin;45 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3323E Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX3323EEPE    
    		Active PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3323EEPE+  
    		Active PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3323EEUE    
    		Active TSSOP;16 pin;33 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0117 (PDF)
    Use pkgcode/variation: U16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3323EEUE-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX3323EEUE+  
    		Active TSSOP;16 pin;33 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0117 (PDF)
    Use pkgcode/variation: U16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3323EEUE+T    
    		Active TSSOP;16 pin;33 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0117 (PDF)
    Use pkgcode/variation: U16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• New Product Press Release 2002-11-19 

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    Document Ref.: 19-2667; Rev 1; 2003-01-31
    This page last modified: 2007-07-31


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