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MAX6920：12-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

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).

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

MAX6920: Typical Operating Circuit Applications/Uses Avionics Gaming Machines Industrial Weighing Security Telecom White Goods

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Related Products

• MAX6931：20-Output, 76V, Serial-Interfaced VFD Tube Drivers
• MAX6921：20-Output, 76V, Serial-Interfaced VFD Tube Drivers

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