MAX6921AUI+ Description

The MAX6921AUI+ is a 20-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 MAX6921AUI+ is 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), compatible with either Maxim’s or industry-standard VFD driver and controller.

MAX6921AUI+ 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 (MAX6931 Only)

Push-Pull CMOS High-Voltage Outputs

Outputs can Source 40mA, Sink 4mA Continuously

Outputs can Source 75mA Repetitive Pulses

MAX6921AUI+ Applications

White Goods 

Industrial Weighing

Gaming Machines 

Security

Automotive 

Telecom

Avionics 

VFD Modules

Instrumentation 

Industrial Control