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参数资料
| 型号： | ICM7218AIJIR5254 |
| 厂商： | Intersil |
| 文件页数： | 6/11页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER DECODER 8DIG 28-CERDIP |
| 标准包装： | 143 |
| 显示器类型： | LED |
| 配置： | 7 段显示 |
| 数字或字符： | 8 位数字 |
| 电流 - 电源： | 2.5mA |
| 电源电压： | 4 V ~ 6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 28-CDIP（0.600"，15.24mm） |
| 供应商设备封装： | 28-CDIP 熔接密封，带窗口 |
| 包装： | 管件 |
ICM7218
Inter Digit Blanking
A blanking time of approximately 10 μ s occurs between digit
strobes. This ensures that the segment information is correct
before the next digit drive, thereby avoiding display ghosting.
Driving Larger Displays
If a higher average drive current per digit is required, it is
possible to connect digit drive outputs together. For example,
by paralleling pairs of digit drivers together to drive a 4 digit
display, 5mA average segment drive current can be obtained.
Power Dissipation Considerations
Assuming common anode drive at V DD = 5V and all digits on
with an average of 5 segments driven per digit, the average
current would be approximately 200mA. Assuming a 1.8V
drop across the LED display, there will be a 3.2V drop across
the ICM7218. The device power dissipation will therefore be
640mW, rising to about 900mW, for all ‘8’ ‘s displayed.
Caution: Position device in system such that air can
flow freely to provide maximum cooling. The common
cathode dissipation is approximately one-half that of the
common anode dissipation.
Sequential Addressing Considerations
(lCM7218A/B)
lines and are - DECODE/no Decode, type of Decode (if
desired), SHUTDOWN/no Shutdown and DATA COMlNG/not
Coming. After the control word has been written (with the Data
Coming instruction), display data can be written into memory
with each successive negative going WRITE pulse. After all
8-digit memory locations have been written to, additional
transitions of the WRITE input are ignored until a new control
word is written. It is not possible to change one individual digit
without refreshing the data for all the other digits.
Random Access Input Drive Considerations
(ICM7218C/D)
Control instructions are provided to the ICM7218C/D by a
single three level input terminal (Pin 9), which operates
independently of the WRITE pulse.
Data can be written into memory on the lCM7218C/D by
setting up a 3 bit binary code (one of eight) on the digit
address inputs and applying a low level to the WRITE pin.
For example, it is possible to change only digit 7 without
altering the data for the other digits. (See Figure 6).
Supply Capacitor
A 0.1 μ F plus a 47 μ F capacitor is recommended between
V DD and V SS to bypass display multiplexed noise.
The control instructions are read from the input bus lines if
MODE is high and WRITE low. The instructions occur on 4
FIGURE 4. TIMING DIAGRAM FOR ICM7218A/B
FIGURE 5. LOAD SEQUENCE ICM7218A/B
6
FN3159.2
February 15, 2007
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| ICM7218AIJIZ | 制造商:Intersil Corporation 功能描述: |
| ICM7218AIPI | 功能描述:LED显示驱动器 8-Digit MUXd Decoder/Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| ICM7218AIPI+ | 功能描述:LED显示驱动器 8-Digit MUXd Decoder/Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| ICM7218AIPI-2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:LED Display Driver |
| ICM7218AIQI | 功能描述:LED显示驱动器 8-DIGIT MULTIPLEXED LED DECODER DRVR RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
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