Rainbow-electronics MAX6934 Bedienungsanleitung PDF herunterladen (Seite 7)

MAX6922/MAX6932/MAX6933/MAX6934

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

Serial-Interfaced VFD Tube Drivers

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Detailed Description

The MAX6922/MAX6932/MAX6933/MAX6934 are VFD

tube drivers comprising a 4-wire serial interface driving

high-voltage Rail-to-Rail



output ports. The driver is suit-

able for both static and multiplexed displays.

The output ports feature high current-sourcing capabili-

ty to drive current into grids and anodes of static or

multiplex VFDs. The ports also have active current sink-

ing for fast discharge of capacitive display electrodes

in multiplexing applications.

The 4-wire serial interface comprises a shift register

and transparent latch with 32 bits for the MAX6922/

MAX6934, 28 bits for the MAX6933, and 27 bits for the

MAX6932. The shift register is written through a clock

input CLK and a data input DIN. For the MAX6922/

MAX6932/MAX6934, the data propagates to a data out-

put DOUT. The data output allows multiple drivers to be

cascaded and operated together. The output latch is

transparent to the shift register outputs when LOAD is

high, and latches the current state on the falling edge

of LOAD.

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

SERIAL-TO-PARALLEL SHIFT REGISTER

LATCHES

CLK

DIN

LOAD

BLANK

OUT0 OUT1 OUT2

OUTn

WHERE n =

27 FOR MAX6932

28 FOR MAX6933

32 FOR MAX6922/MAX6934

DOUT

MAX6922/MAX6932/

MAX6934 ONLY

MAX6922

MAX6932

MAX6933

MAX6934

Figure 1. MAX6922/MAX6932/MAX6933/MAX6934 Functional Diagram

SLEW-RATE

CONTROL

OUT_

40Ω

TYPICAL

750Ω

TYPICAL

SLEW-RATE

CONTROL

OUT_

40Ω

TYPICAL

750Ω

TYPICAL

Figure 2. MAX6922 CMOS Output Driver Structure Figure 3. MAX6932/MAX6933/MAX6934 CMOS Output Driver

Structure

1 2 3 4 5 6 7 8 9 10 11 12 ... 15 16

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

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