MAX6922:27-, 28-, and 32-Output, 76V, Serial-Interfaced VFD Tube Drivers

76V, 27-, 28-, and 32-Output, Serial-Interfaced VFD Drivers Continuously Source 40mA with Slew-Rate limiting to Reduce EMI

The MAX6922/MAX6932/MAX6933/MAX6934 multi-output, 76V, vacuum-fluorescent display (VFD) tube drivers that interface a VFD tube to a microcontroller or a VFD controller, such as the MAX6850–MAX6853. The MAX6922/MAX6934 have 32 outputs, while the MAX6932 has 27 outputs, and the MAX6933 has 28 outputs. All devices are also suitable for driving telecom relays. Data is input using standard 4-wire serial interface (CLOCK, DATA, LOAD, BLANK) compatible with other VFD drivers and controllers. For easy display control, the active-high BLANK input forces all driver outputs low, turning the display off, and automatically puts the IC into shutdown mode. Display intensity may also be controlled by directly pulse-width modulating the BLANK input. The MAX6922/MAX6932/MAX6934 have a serial interface data output, DOUT, allowing any number of devices to be cascaded on the same serial interface. The MAX6932/MAX6933/MAX6934 have a negative supply voltage input, VSS, allowing the drivers' output swing to be made bipolar to simplify filament biasing in many applications. The MAX6922 is available in a 44-pin PLCC package, the MAX6932 and MAX6933 are available in 36-pin SSOP packages, and the MAX6934 is available in 44-pin PLCC and TQFN packages. Maxim also offers a 12-output VFD driver (MAX6920) and 20-output VFD drivers (MAX6921/MAX6931).

Key Features
  • 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 (MAX6932/MAX6933/MAX6934 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
  • -40°C to +125°C Temperature Range as Standard
MAX6922, MAX6932, MAX6933, MAX6934: Typical Operating Circuit
MAX6922, MAX6932, MAX6933, MAX6934: Typical Operating Circuit
  • Avionics
  • Gaming Machines
  • Industrial Control
  • Industrial Weighing
  • Instrumentation
  • Security
  • Telecom
  • VFD Modules
  • White Goods
titleDownload file
MAX6922-MAX6934 Data SheetMAX6922-MAX6934.pdf
Part NumberController/ Drvr.Display TypeInterfaceVSUPPLY
See Notes
MAX6934---3.5 to 5.5
8.0 to 76.0
$5.25 @1k
MAX6922DriverVFD Tube - 32 PortsSerial 4-WirePLCC/44$4.49 @1k
Quality and Environmental Data
Related Products
  • MAX6920:12-Output, 76V, Serial-Interfaced VFD Tube Driver
  • MAX6931:20-Output, 76V, Serial-Interfaced VFD Tube Drivers
  • MAX6921:20-Output, 76V, Serial-Interfaced VFD Tube Drivers
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6922AQH+DActivePLCC,;44 pin;311.5 mm²-40°C to +85°CLead Free
MAX6922AQH+TDActivePLCC,;44 pin;311.5 mm²-40°C to +85°CLead Free
MAX6922AQH-DNo Longer AvailableMAX6922AQH+DPLCC,;44 pin;311.5 mm²-40°C to +85°CNo
MAX6922AQH-TDNo Longer AvailableMAX6922AQH+TDPLCC,;44 pin;311.5 mm²-40°C to +85°CNo
MAX6922-MAX6934.pdf MAX6934
MAX6922.pdf MAX6922
MAX6922-MAX6934.pdf MAX6922