BU2872AK Просмотр технического описания (PDF) - ROHM Semiconductor

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BU2872AK

FL tube driver

ROHM Semiconductor 

Standard ICs

FL tube driver

BU2872AK

The BU2872AK is a driver IC for the FL display unit. It has a total of 22 high withstanding voltage output pins, and

supports displays ranging from 11-segment 11-character displays to 16-segment 4-character displays. A key scan

function, LED drive output, and a general-purpose input pin make this IC ideal for use in the front panels of VTRs

and other equipment. A serial interface enables control of all functions through a microcomputer.

•Applications

VCRs

•Features

1) High withstanding voltage output.

2) Display modes: 11S × 11G ~16S × 4G

3) Variable display luminance (7 steps).

4) 3-wire serial interface.

5) Key scanning function (6 × 4).

6) Internal pull-down resistance (high withstanding volt-

age output).

7) QFP 44-pin package.

•Block diagram

L4

8bit shift - REG.

OSC

L1

SW4

SW1

K4

K1

16bit latch

CONTROL

LOGIC

G1

16bit × 11word

Display DATA RAM

KEY DATA

latch

(4 × 6)

G6

SEGMENT Driver

S / G Driver

1

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