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参数资料
| 型号： | ICM7228BIBIZ |
| 厂商： | Intersil |
| 文件页数： | 15/18页 |
| 文件大小： | 0K |
| 描述： | IC LED DISPLAY DRVR 8DGT 28-SOIC |
| 标准包装： | 260 |
| 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： | 250µA |
| 电源电压： | 4 V ~ 6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC W |
| 包装： | 管件 |
ICM7228
Power Supply Bypassing
V DD
V DD
1K
V DD
1.4A PEAK
2N6034
Connect a minimum of 47 μ F in parallel with 0.1 μ F capacitors
between V DD and V SS of ICM7228. These capacitors
should be placed in close proximity to the device to reduce
the power supply ripple caused by the multiplexed LED
100 ?
ICM7228B
SEGMENT
OUTPUT
display drive current pulses.
V DD
DIGIT
300 ?
1K
25 ?
V SS
OUTPUT
N
≈ 15 ?
1K
V SS
(100mA PEAK )
2N2219
FIGURE 16. DRIVING HIGH CURRENT DISPLAY, COMMON
CATHODE ICM7228B TO COMMON ANODE
DISPLAY
Three Level Input, ICM7228C
As mentioned before, pin 9 is a three level input and controls
three functions: Hexadecimal display decoding, Code B
display decoding and shutdown mode. In many applications,
pin 9 will be left open or permanently wired to one state. When
pin 9 can not be permanently left in one state, the circuits
illustrated in Figure 17 can be used to drive this three level
input.
HIGH = HEX
LOW = SHUTDOWN
HIGH = HEX OR SHUTDOWN
LOW = CODE B
74C126 THREE-STATE BUFFER
PIN 9
CD4016
HIGH = HEX
LOW = SHUTDOWN
HIGH = HEX OR SHUTDOWN
LOW = CODE B
CD4066
CONTROL
PIN 9
HIGH = CODE B
LOW = HEX
HIGH = SHUTDOWN
LOW = CODE B
HIGH = SHUTDOWN
LOW = HEX
CD4069
CD4069
CD4069
1N4148
1N4148
PIN 9
PIN 9
PIN 9
OPEN DRAIN OR OPEN
HIGH = SHUTDOWN
LOW = CODE B
COLLECTOR OUTPUT
PIN 9
FIGURE 17. ICM7228C PIN 9 DRIVE CIRCUITS
15
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