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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 Applications/Uses Avionics Gaming Machines Industrial Control Industrial Weighing Instrumentation Security Telecom VFD Modules White Goods

DataSheet

Parametrics

Quality and Environmental Data

• MAX6922.pdf

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

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