MAX6920

PRODUCTION

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

Data Sheet (Rev. 1) Product Selection Table
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Overview

  • 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

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).

Applications

  • Avionics
  • Gaming Machines
  • Industrial Weighing
  • Security
  • Telecom
  • White Goods
MAX6920
12-Output, 76V, Serial-Interfaced VFD Tube Driver
MAX6920: Typical Operating Circuit
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Documentation

Data Sheet 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Lamp & Tube Drivers 2
MAX6921
PRODUCTION 20-Output, 76V, Serial-Interfaced VFD Tube Drivers
MAX6931
20-Output, 76V, Serial-Interfaced VFD Tube Drivers
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