BU2872AK-E2 Rohm Semiconductor, BU2872AK-E2 Datasheet

IC DRIVER FL TUBE 5V QFP44 TR

BU2872AK-E2

Manufacturer Part Number
BU2872AK-E2
Description
IC DRIVER FL TUBE 5V QFP44 TR
Manufacturer
Rohm Semiconductor
Datasheet

Specifications of BU2872AK-E2

Display Type
Vacuum Fluorescent (VF)
Configuration
16 Segments
Interface
3-Wire Serial
Digits Or Characters
4 Characters
Current - Supply
5mA
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-25°C ~ 75°C
Mounting Type
Surface Mount
Package / Case
44-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Manufacturer
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Part Number:
BU2872AK-E2
Manufacturer:
Rohm
Quantity:
3 509
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.
VCRs
1) High withstanding voltage output.
2) Display modes: 11S
3) Variable display luminance (7 steps).
4) 3-wire serial interface.
Applications
Features
Block diagram
FL tube driver
BU2872AK
Standard ICs
SW4
SW1
K4
K1
L4
L1
11G ~16S
KEY DATA
latch
(4
6)
SEGMENT Driver
4G
8bit shift - REG.
Display DATA RAM
16bit
16bit latch
11word
5) Key scanning function (6
6) Internal pull-down resistance (high withstanding volt-
7) QFP 44-pin package.
age output).
S / G Driver
CONTROL
OSC
LOGIC
4).
G1
G6
1

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BU2872AK-E2 Summary of contents

Page 1

... 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. • ...

Page 2

... – – BU2872AK Function Connected to the power supply of the system Connected to the oscillation capacitor Connected to the ground of the system Serial data input starting from MSB Serial data output starting from MSB Serial data read at rising edge Serial initialization at "L", effective at "H" ...

Page 3

... Input clock cycle at minimum value Fig Monitor V SS Fig.5 BU2872AK = 5V 0V 30V Conditions = V – – – 1mA O = – 10mA O — — — — Test pin Fig.3 Measurement circuit Fig ...

Page 4

... External dimensions (Units: mm) 14.0 0.3 10.0 0 0.8 0.35 0.1 QFP44 – TEMPERATURE : Fig.7 “H” grid output current temperature characteristics 0.15 0.1 0.15 BU2872AK 13 12.8 12.6 12.4 12.2 12 11.8 11.6 11.4 11.2 11 – TEMPERATURE : Fig.8 “H” segment output current temperature characteristics 75 ...

Page 5

Appendix No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product ...

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