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参数资料
| 型号： | LC75412WS |
| 元件分类： | 音频控制 |
| 英文描述： | VOLUME CONTROL CIRCUIT, PQFP64 |
| 封装： | 10 X 10 MM, SQFP-64 |
| 文件页数： | 10/19页 |
| 文件大小： | 179K |
| 代理商： | LC75412WS |
LC75412WS
No.A1354-18/19
(5) Cautions related to serial data transfer
1) To ensure that the high-frequency digital signals transferred to the CL, DI, and CE pins do not spill over to the
analog signal block, either guard these signal lines with a ground pattern, or perform transmission using shielded
wires.
2) The data format of the LC75412WS uses 8-bit addresses and 44-bit data. When sending data using multiples of 8
(when sending 48 bits), use the method described in Figure 1.
Method for Receiving Data Using Multiple of 8 of LC75412WS
Figure 1
(6) Note on usage of external muting
See Figure 2, to control muting with an external switch. If a microcontroller is used for the control, it is likely that an
overvoltage is applied to the microcontroller via the MUTE pin because the MUTE pin is connected internally to
VDD. To avoid such problems, add the resister R2 as shown in Figure 3 to resistor-divide the voltage at the MUTE
pin.
Figure 2
Figure 3
As an example, the relationship between the voltages at the MUTE pin and the values of R2 when VDD is 9 volts is
shown below. The characteristic curve shown in the figure is a standard one.
*VIH (High detection voltage) at the MUTE pin must always be 4V or higher regardless of the supply voltage to be
used.
D43
D42
D41
D40
D39
D38
D37
D36
D3
D2
D1
D0
X
Test mode control
Input switching control
Dummy data
X: don’t care
Switch
MUTE
VDD
R1
MUTE
Microcontroller
R2
VDD
R1
50
0
100
150
200
2
0
4
6
8
10
MUTE
pin
voltage
-
V
R2 - k
Ω
Ta=25
°C
Relationship between R2 values and
MUTE pin voltages when VDD is 9 volt
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LC75412WS-UF-E | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LC75421 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Electronic Volume Controller for Cars |
| LC75421M | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Electronic Volume Controller for Cars |
| LC75421M-MPB-E | 制造商:ON Semiconductor 功能描述:ELECTRONIC VOLUME - Ammo Pack |
| LC75421M-TLM-E | 制造商:ON Semiconductor 功能描述:ELECTRONIC VOLUME - Tape and Reel |
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