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FDA903D-EHT 数据表(PDF) 33 Page - STMicroelectronics |
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FDA903D-EHT 数据表(HTML) 33 Page - STMicroelectronics |
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33 / 82 page  DocID031502 Rev 2 33/82 FDA903D Hardware mute pin 81 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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