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GS2974ACTE3 датащи(PDF) 11 Page - Gennum Corporation |
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GS2974ACTE3 датащи(HTML) 11 Page - Gennum Corporation |
11 / 16 page GS2974A HD-LINX™ III Adaptive Cable Equalizer Data Sheet 42216 - 3 January 2009 11 of 16 does not solve this problem, since the signal to noise ratio on the circuit board could be significantly less than the default signal detection level set by the on chip reference. NOTE: MCLADJ is only recommended for data rates up to 360Mb/s. For data rates above this, MCLADJ should be left floating. 4.4 Mute and Carrier Detect The GS2974A includes a MUTE input pin that allows the application interface to mute the serial digital output at any time. Set the MUTE pin HIGH to mute SDO and SDO. In this case, the outputs will mute regardless of the setting of the BYPASS pin. A Carrier Detect output pin (CD) indicates the presence of a valid signal at the input of the GS2974A. When CD is LOW, the device has detected a valid input on SDI and SDI. When CD is HIGH, the device has not detected a valid input. NOTE: This pin may be connected directly to the CD pin to allow mute on loss of carrier. NOTE: CD will only detect loss of carrier for data rates greater than 19Mb/s. The CD output pin may be connected directly to the MUTE input pin to enable automatic muting of the GS2974A when no valid input signal has been detected. NOTE: If the maximum cable length is exceeded and the device is not in bypass mode the GS2974A will not assert the CD pin even if a carrier is present. Table 4-1: Mute Input Table Mute Function 0 SDO and SDO operate normally 1 SDO and SDO are forced to a steady state Table 4-2: CD Output Table CD Input Status 0 Valid Input on SDI, SDI pins 1 Input is not valid |
Аналогичный номер детали - GS2974ACTE3 |
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Аналогичное описание - GS2974ACTE3 |
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