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Maxim > Products > [Interface and Interconnect] 
MAX3320A, MAX3320B, MAX3320L, MAX3320T
3V to 5.5V, Up to 250kbps True RS-232 Transceiver with 4µA AutoShutdown Plus and Power On Reset


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 128kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX3320 combines a microprocessor (µP) supervisory circuit with an RS-232 transceiver. The power-on reset performs a single function: it asserts a reset signal whenever the VCC supply voltage declines below a preset threshold, staying asserted for at least 100ms after VCC rises above the reset threshold. The MAX3320 has an active-low RESET output, which is guaranteed to be in the correct state for VCC down to 1V. The reset comparator is designed to ignore fast transients on VCC. Reset thresholds suitable for operation with a variety of supply voltages are available.

The MAX3320 transceivers have a proprietary low-dropout transmitter output stage, enabling true RS-232 performance with a dual charge pump powered from a +3V to +5.5V supply. The device requires only four small 0.1µF external charge-pump capacitors, and is guaranteed to run at data rates of up to 250kbps. It comes in the space-saving 20-pin SSOP package.

Key Features   Applications/Uses
  • Precise Monitoring of 5V and 3.3V Power-Supply Voltages:
    • 100ms (min) Power-On active-low RESET Pulse Width
    • Power-Supply Transient Immunity
    • Guaranteed active-low RESET Valid to VCC = 1V
  • 4µA Supply Current Achieved with AutoShutdown Plus™
  • Receivers Always Active
  • Power-On Reset Always Active
  • 4µA Low-Power Shutdown
  • 250kbps Guaranteed Data Rate

 
  		• Handheld Equipment
  		• Palmtop Computers
  		• Peripherals
  		• Portable Battery-Powered Equipment
  		• Printers

    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
    MAX3320 
    3.3
    5
    		 2 2 250 0.45 Yes 4 0.1 2
    SSOP/20
    		 $1.85 @1k
    See All RS-232 Line Driver/Receivers (152)

    Diagram
    MAX3320A, MAX3320B, MAX3320L, MAX3320T: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 761: Automatic Test Equipment on a Budget - MAX3320

    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: 1-28 of 28

    MAX3320A Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX3320ACAP    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3320ACAP-T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX3320ACAP+  
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3320ACAP+T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX3320AEAP    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3320AEAP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX3320AEAP+  
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3320AEAP+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX3320B Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX3320BCAP+  
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3320BCAP+T    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3320BEAP+  
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3320BEAP+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX3320BCAP    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3320BCAP-T    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3320BEAP    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3320BEAP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX3320L Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX3320LCAP    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3320LCAP-T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX3320LEAP    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3320LEAP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX3320T Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX3320TEAP+  
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3320TEAP+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX3320TCAP    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3320TCAP-T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX3320TCAP+  
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3320TCAP+T    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3320TEAP    
    		Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3320TEAP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet

    Notes and Comments
    • AutoShutdown Plus, On-Board Reset Voltage Monitor

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    Document Ref.: 19-1253; Rev 0; 1997-08-01
    This page last modified: 2007-07-19


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