Rainbow-electronics MAX6934 Bedienungsanleitung PDF herunterladen

MAX6922/MAX6932/MAX6933/MAX6934

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

Serial-Interfaced VFD Tube Drivers

________________________________________________________________ Maxim Integrated Products 1

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.

General Description

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

, 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 thin QFN packages.

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

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

Applications

White Goods Industrial Weighing

Gaming Machines Security

Automotive Telecom

Avionics VFD Modules

Instrumentation Industrial Control

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

Ordering Information

19-3224; Rev 0; 1/04

PART TEMP RANGE PIN-PACKAGE

MAX6922AQH

-40°C to +125°C

44 PLCC

MAX6932AAX

-40°C to +125°C

36 SSOP

MAX6933AAX

-40°C to +125°C

36 SSOP

MAX6934AQH

-40°C to +125°C

44 PLCC

MAX6934ATH

-40°C to +125°C

44 Thin QFN

MAX6934

DIN

CLK

LOAD

BLANK

VFDOUT

VFCLK

VFLOAD

VFBLANK

VFD TUBE

12 16

THIN QFN

GND

-7V

µC

100nF

+5V

100nF

+60V

OUT0–OUT31

Typical Operating Circuit

Pin Configurations appear at end of data sheet.

Selector Guide

PART

NO. OF

OUTPUTS

BIPOLAR

OUTPUT

SWING

DOUT FOR

CASCADING

MAX6922 32 No Yes

MAX6932 27 Yes Yes

MAX6933 28 Yes No

MAX6934 32 Yes Yes

1 2 3 4 5 6 ... 15 16

27-, 28-, and 32-Output, 76V 1