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FDA803D 数据表(PDF) 33 Page - STMicroelectronics |
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FDA803D 数据表(HTML) 33 Page - STMicroelectronics |
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33 / 78 page  DocID031487 Rev 2 33/78 FDA803D Hardware mute pin 77 9 Hardware mute pin The pin "HWMute" (pin 30) acts as mute command for the channel. The device is muted when this pin is low, while it is in play when this pin is high (low/high threshold in Table 5: Electrical characteristics). Inside the device, connected to this pin a pull-up current generator puts the device in play if left floating. An internal clamp limits the Mute pin voltage. If not used, this pin should remain floating. To drive the Mute pin to get a hardware mute an external pull-down open drain is needed. (See Figure 44), RMute must be < 60 kΩ Figure 44. HWMute pin schematic |
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