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Maxim > Products > [LED Lighting and LCD Display ICs]  [Automotive] 
MAX6921, MAX6931
20-Output, 76V, Serial-Interfaced VFD Tube Drivers


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 280kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX6921/MAX6931 are 20-output, 76V, vacuum-fluorescent display (VFD) tube drivers that interface a multiplexed VFD tube to a VFD controller, such as the MAX6850-MAX6853, or to a microcontroller. The MAX6921/MAX6931 are also ideal for driving static VFD tubes or telecom relays.

Data is input using an industry standard 4-wire serial interface (CLOCK, DATA, LOAD, BLANK), compatibile with either Maxim's or industry-standard VFD driver and controller.

For easy display control, the active-high BLANK input forces all driver outputs low, turning the display off, and automatically puts the MAX6921/MAX6931 into shutdown mode. Display intensity may also be controlled by directly pulse-width modulating the BLANK input.

The MAX6921 has a serial interface data output, DOUT, allowing any number of devices to be cascaded on the same serial interface.

The MAX6931 has a negative supply voltage input, VSS, allowing the drivers' output swing to be made bipolar to simplify filament biasing in many applications.

The MAX6921 is available in 28-pin TSSOP, SO, and PLCC packages. The MAX6931 is available in a 28-pin TSSOP package.

Maxim also offers 12-output VFD drivers (MAX6920) and 32-output VFD drivers (MAX6922/MAX6932).

Key Features   Applications/Uses
  • 5MHz Industry-Standard 4-Wire Serial Interface
  • 3V to 5.5V Logic Supply Range
  • 8V to 76V Grid/Anode Supply Range
  • -11V to 0V Filament Bias Supply (MAX6931 Only)
  • Push-Pull CMOS High-Voltage Outputs
  • Outputs can Source 40mA, Sink 4mA Continuously
  • Outputs can Source 75mA Repetitive Pulses
  • Outputs can be Paralleled for Higher Current Drive
  • Any Output can be Used as a Grid or an Anode Driver
  • Blank Input Simplifies PWM Intensity Control
  • Small 28-Pin TSSOP Package
  • -40°C to +125°C Temperature Range
  • Underwriters Laboratories (UL®) Recognized

  
  		• Automotive
  		• Avionics
  		• Gaming Machines
  		• Industrial Control
  		• Industrial Weighing
  		• Instrumentation
  		• Security
  		• Telecom
  		• VFD Modules
  		• White Goods

    Key Specifications:  VFD Display Drivers
    Part Number Features Controller/ Drvr. Display Type Interface Cursor Control Blink Cntrl. VSUPPLY
    (V)    		 Price
    See Notes
    MAX6921 
    Cascadeable
    Outputs may be paralleled
    Push-pull 40mA CMOS outputs
    		 Driver Any type Serial 4-Wire No No 8.0 to 76.0 $2.90 @1k
    MAX6931 
    Negative supply option
    Outputs may be paralleled
    Push-pull 40mA CMOS outputs
    		 $2.90 @1k
    See All VFD Display Drivers (7)

    Diagram
    MAX6921, MAX6931: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 1154: Vacuum-Fluorescent-Display (VFD) Tube Manufacturers' Web Sites - MAX6921, MAX6931

    Design Guides
  		• Displays (PDF)

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:
  		• Underwriters Laboratories (UL®) Recognized

    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

    MAX6921 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX6921AQI  
    		Active PLCC;28 pin;158 mm²
    Outline Drawing: 21-0049 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: Q28-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6921AQI-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +125°C See data sheet
    MAX6921AQI+  
    		Active PLCC;28 pin;158 mm²
    Outline Drawing: 21-0049 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: Q28+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6921AQI+T    
    		Active PLCC;28 pin;158 mm²
    Outline Drawing: 21-0049 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: Q28+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6921AWI  
    		Active SOIC(W);28 pin;193 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0109 (PDF)
    Use pkgcode/variation: W28-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6921AWI-T    
    		Active SOIC(W);28 pin;193 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0109 (PDF)
    Use pkgcode/variation: W28-1*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6921AWI+  
    		Active SOIC(W);28 pin;193 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0109 (PDF)
    Use pkgcode/variation: W28+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6921AWI+T    
    		Active SOIC(W);28 pin;193 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0109 (PDF)
    Use pkgcode/variation: W28+1*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6921AUI  
    		Active TSSOP;28 pin;65 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0171 (PDF)
    Use pkgcode/variation: U28-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6921AUI-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +125°C See data sheet
    MAX6921AUI+  
    		Active TSSOP;28 pin;65 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0171 (PDF)
    Use pkgcode/variation: U28+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6921AUI+T    
    		Active TSSOP;28 pin;65 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0171 (PDF)
    Use pkgcode/variation: U28+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6931 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX6931AUI+    
    		Active TSSOP;28 pin;65 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0171 (PDF)
    Use pkgcode/variation: U28+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6931AUI+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +125°C See data sheet
    MAX6931AUI  
    		Active TSSOP;28 pin;65 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0171 (PDF)
    Use pkgcode/variation: U28-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6931AUI-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +125°C See data sheet

    Related Products
    MAX6920 12-Output, 76V, Serial-Interfaced VFD Tube Driver
    MAX6922, MAX6932, MAX6933, MAX6934 27-, 28-, and 32-Output, 76V, Serial-Interfaced VFD Tube Drivers

    More Like This: View Product Families for Similar Products

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    Document Ref.: 19-3020; Rev 0; 2003-11-14
    This page last modified: 2008-06-03


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