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MAX6921 - (MAX6921 / MAX6931) Serial-Interfaced VFD Tube Drivers

General Description

The MAX6921/MAX6931 are 20-output, 76V, vacuumfluorescent 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.

Key Features

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

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Other Datasheets by Maxim Integrated (Analog Devices)

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MAX6920 Serial-Interfaced VFD Tube Driver
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MAX6931 (MAX6921 / MAX6931) Serial-Interfaced VFD Tube Drivers
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-3020; Rev 0; 10/03 20-Output, 76V, Serial-Interfaced VFD Tube Drivers General Description The MAX6921/MAX6931 are 20-output, 76V, vacuumfluorescent 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.