BU2879AKVP

更新时间： 2024-01-09 08:28:28

品牌	Logo	应用领域
罗姆 - ROHM		显示驱动器驱动程序和接口接口集成电路
页数	文件大小	规格书
5页	53K
描述
Vacuum Fluorescent Driver, 26-Segment, PQFP44

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技术参数
数据手册

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BU2879AKVP 技术参数

生命周期：	Obsolete	包装说明：	QFP,
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.76
数据输入模式：	SERIAL	显示模式：	DOT MATRIX
输入特性：	STANDARD	接口集成电路类型：	VACUUM FLUORESCENT DISPLAY DRIVER
JESD-30 代码：	S-PQFP-G44	复用显示功能：	NO
功能数量：	1	区段数：	26
端子数量：	44	封装主体材料：	PLASTIC/EPOXY
封装代码：	QFP	封装形状：	SQUARE
封装形式：	FLATPACK	认证状态：	Not Qualified
标称供电电压：	5 V	表面贴装：	YES
端子形式：	GULL WING	端子位置：	QUAD
Base Number Matches：	1

BU2879AKVP 数据手册

Standard ICs

BU2879AK

Pins descriptions

•

Pin No.

14, 38

Name

Power supply pin 1

Oscillation pin

Ground pin

I / O

Function

Connected to system power supply.

Capacitor connection pin for oscillation

Connected to system ground.

Input

OSC

Input

output

7, 43

Input

Serial data input

Serial data input starting from MSB

Serial data output starting from MSB;

output is Nch open drain.

Serial data output

Output

SCK

Serial clock input

Serial chip select

Input

Serial data read at rising edge.

Serial initialization when LOW, valid at HIGH.

High-voltage withstand

output pin for segment

Output pin for segment; output is

Pch open drain + pull-down resistance.

S11

Output

Input

VEE

Power supply pin 2

Pull-down resistance connection for FLP driver output.

39,

High-voltage withstand

output pin for grid

Output pin for grid; output is Pch

open drain + pull-down resistance.

G10

Output

S12

S16

G15

G11

26,

High-voltage withstand

output pin for segment / grid

Used to switch output between segment and grid;

output is Pch open drain + pull-down resistance.

Output

Input

Data input pin for key scanning.

Key data input pin

General-purpose input pin; input data can be

transmitted serially to microcomputer.

SW1

SW4 General-purpose input pin

Input

Electrical characteristics (unless otherwise noted, Ta = 25°C, VDD = 5V, VSS = 0V, VDD – VEE = 35V)

•

Measurement

circuit

Parameter

Supply current

Symbol Min.

Typ.

—

Max.

Unit

Conditions

—

OSC

44-pin attachment, at 1000pF oscillation

Pins 1 to 4, 6, 8, 9 to 13

Fig.1

Fig.4

Fig.2

Fig.3

Fig.2

Fig.3

—

Input threshold voltage

Input current

1.5

—

3.5

—

µA

Pins 1 to 4, 6, 8, 9 to 13

OSC oscillation frequency

Segment output current

Grid output current

130

200

—

300

—

kHz

44-pin attachment, at 1000pF oscillation

seg

grd

Pins 15 to 26, 28 to 31, V_O

V_DD

–

V_DD

V_EE

—

Pins 26, 28 to 37, 39 to 42, V_O

–

—

Leakage current when OFF

Output pull-down resistance

Maximum operating frequency

Serial transmission

OFF

140

µA

Pins 15 to 26, 28 to 37, V_O

Pins 15 to 26, 28 to 37

V_DD

–

—

kΩ

MAX

MHz Design guarantee value

—

Input data hold

0.16

—

Input data setup

Output data delay

0.3

—

Input clock cycle

SCYC

0.5

Input clock "H" width

At minimum input clock cycle

For the high voltage withstand output pins for the segment / grid of pins 26 and 28 to 31, when segment output is specified, segment output current is output, and

when grid output is specified, grid current is output.

1 234 5

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