BU2872AK Datasheet, PDF (1/4 Pages) Rohm – FL tube driver

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