MAX6934 Maxim Integrated Products, MAX6934 Datasheet

MAX6934

Manufacturer Part Number

MAX6934

Description

Serial-Interfaced VFD Tube Drivers

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX6934.pdf (16 pages)

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The MAX6922/MAX6932/MAX6933/MAX6934 multi-out-

put, 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 inter-

face 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, V

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 thin QFN packages.

Maxim also offers a 12-output VFD driver (MAX6920)

and 20-output VFD drivers (MAX6921/MAX6931).

19-3224; Rev 0; 1/04

Pin Configurations appear at end of data sheet.

For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX6922

MAX6932

MAX6933

MAX6934

PART

White Goods

Gaming Machines

Automotive

Avionics

Instrumentation

OUTPUTS

NO. OF

________________________________________________________________ Maxim Integrated Products

General Description

, allowing the drivers’ output

Industrial Weighing

Security

Telecom

VFD Modules

Industrial Control

BIPOLAR

OUTPUT

Selector Guide

SWING

Serial-Interfaced VFD Tube Drivers

Yes

Applications

CASCADING

DOUT FOR

Yes

27-, 28-, and 32-Output, 76V,

MAX6922AQH

MAX6932AAX

MAX6933AAX

MAX6934AQH

MAX6934ATH

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

PART

µC

VFBLANK

VFDOUT

VFLOAD

VFCLK

Typical Operating Circuit

100nF

-40°C to +125°C

Ordering Information

TEMP RANGE

-7V

+5V

DIN

CLK

LOAD

BLANK

THIN QFN

MAX6934

OUT0–OUT31

GND

+60V

PIN-PACKAGE

44 PLCC

36 SSOP

44 PLCC

44 Thin QFN

www.DataSheet4U.com

Features

100nF

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