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12-Output, 76V, Serial-Interfaced VFD Tube Driver

76V, 12- and 20-Output, Serial-Interfaced VFD Drivers Continuously Source 40mA with Slew-Rate Limiting to Reduce EMI

Product Details

Key Features

Parametric specs for VFD Display Drivers
Controller/ Driver Driver
Display Type Any type
Interface Serial 4-Wire
Cursor Control No
Blink Cntrl. No
VSUPPLY (V) 8.0 to 76.0
Package/Pins SOIC (W)/20
Budgetary
Price (See Notes)
2.96
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Simplified Block Diagram

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Parameters

Parametric specs for VFD Display Drivers
Controller/ Driver Driver
Display Type Any type
Interface Serial 4-Wire
Cursor Control No
Blink Cntrl. No
VSUPPLY (V) 8.0 to 76.0
Package/Pins SOIC (W)/20
Budgetary
Price (See Notes)
2.96

Key Features

  • 5MHz Industry-Standard 4-Wire Serial Interface
  • 3V to 5.5V Logic Supply Range
  • 8V to 76V Grid/Anode Supply Range
  • 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 20-Pin SO Package
  • -40°C to +125°C Temperature Range

Applications/Uses

  • Avionics
  • Gaming Machines
  • Industrial Weighing
  • Security
  • Telecom
  • White Goods

Description

The MAX6920 is a 12-output, 76V, vacuum fluorescent display (VFD) tube driver that interfaces a multiplexed VFD tube to a VFD controller such as the MAX6850-MAX6853 or to a microcontroller. The MAX6920 is also ideal for driving either static VFD tubes or telecom relays.

Data is inputted using an industry-standard 4-wire serial interface (CLOCK, DATA, LOAD, BLANK) for compatibility with both industry-standard drivers and Maxim's VFD controllers.

For easy display control, the active-high BLANK input forces all driver outputs low, turning the display off, and automatically puts the MAX6920 into shutdown mode. Display intensity may also be controlled by pulse-width modulating the BLANK input.

The MAX6920 has a serial interface data output pin, DOUT, allowing any number of devices to be cascaded on the same serial interface.

The MAX6920 is available in a 20-pin SO package. Maxim also offers VFD drivers with either 20 (MAX6921/MAX6931) or 32 outputs (MAX6922 and MAX6932).

Simplified Block Diagram

MAX6920: Typical Operating Circuit MAX6920: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.