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参数资料
| 型号： | AS1108WL-T |
| 厂商： | ams |
| 文件页数： | 17/21页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER LED 4-DIGIT 20-SOIC |
| 标准包装： | 1,500 |
| 显示器类型： | LED |
| 配置： | 7 段 + DP |
| 接口： | 串行 |
| 数字或字符： | 4 位数字 |
| 电流 - 电源： | 330mA |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC |
| 包装： | 带卷 (TR) |
AS1108
Datasheet - Ty p i c a l A p p l i c a t i o n
4x8 LED Dot Matrix Driver
The application example in Figure 12 shows the AS1108 as a 4x8 LED dot matrix driver.
The LED columns have common cathodes and are connected to the DIG0:3 outputs. The rows are connected to the
segment drivers. Each of the 32 LEDs can be addressed separately. The columns are selected via the digits as listed
The Decode Enable Register (see page 10) must be set to ‘00000000’ as described in Table 9 on page 10. Single
LEDs in a column can be addressed as described in Table 12 on page 11, where bit D0 corresponds to segment G and
bit D7 corresponds to segment DP.
Note: For a multiple-digit dot matrix, multiple AS1108 devices must be cascaded.
Figure 12. Application Example as LED Dot Matrix Driver
4x8 LED
Dot Matrix
4x8 LED
Dot Matrix
Diode Arrangement
SEG G
SEG F
SEG E
SEG D
SEG C
SEG B
SEG A
SEG DP
SEG A:G DIG0:3
SEG G
SEG F
SEG E
SEG D
SEG C
SEG B
SEG A
SEG DP
SEG A:G DIG0:3
SEG DP
DOUT
SEG DP
AS1108
AS1108
Micro-
Processor
DIN
LOAD/CSN
CLK
VDD
V BAT
9.53k ?
DIN
LOAD/CSN
CLK
VDD
V BAT
9.53k ?
GND
GND
ISET
GND
GND
ISET
Cascading Drivers
If more than 4 digits or 32 LEDs are needed, it is recommended to use the AS1106/AS1107, although several AS1108
devices can be cascaded.
The example in Figure 4 drives 2 dot matrix digits using a 4-wire microprocessor interface. All Scan-Limit Registers
should be set to the same value so that one display will not appear brighter than the other.
For example, to display 6 digits, set both Scan-Limit Registers to display 3 digits so that both displays have a 1/3 duty
cycle per digit. If 5 digits are needed, set both Scan-Limit Registers to display 3 digits and leave one digit unconnected.
Otherwise, if one driver is set to display 3 digits and the other to display 2 digits one display will appear brighter
because its duty cycle per digit will be 1/2 and the other display’s duty cycle will be 1/3.
Note: Refer to No-Op Register (0xX0) on page 13 for additional information.
Revision 2.13
16 - 20
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1108WL-T-Z | 制造商:AMS 功能描述:0 |
| AS1108-XXX-I-A1-D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
| AS1108-XXX-I-A1-S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
| AS1108-XXX-I-A2-D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
| AS1108-XXX-I-A2-S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
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