GS9075B View Datasheet(PDF) - Semtech Corporation
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GS9075B Datasheet PDF : 28 Pages
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4.11 Output Drivers and Serial Clock Outputs
The device’s serial digital data outputs (DDO/DDO) have a nominal voltage of 800mv
single ended or 1600mV differential when terminated into a 50Ω load.
The GS1575B/9075B may also be configured to output a serial clock at the data output
rate. The internal serial clock output block is powered via the SCO_ENABLE pin. When
SCO_ENABLE is connected to VCC, a differential serial clock output will be present on
SCO/SCO. Otherwise, when SCO_ENABLE is connected to GND, the clock output block
will be powered down and the device will have reduced power consumption.
NOTE: The SCO_ENABLE signal should have a 1.5mA drive strength to maintain a
supply voltage of 3.3 +/- 0.165V.
Clock and data alignment is shown in Figure 4-5.
DATA
SCLK
For HD-SDI: tCD = 32ps (typ.), 36ps (max.)
For SD-SDI: t CD = 30ps (typ.), 38ps (max.)
tCD
Figure 4-5: Clock and Data Alignment
4.12 Output Mute
The DDO_MUTE pin is provided to allow muting of the re-timed output.
When the PLL is locked and the device is reclocking, setting DDO_MUTE = LOW will
force the serial digital outputs DDO/DDO to mute. However, if the GS1575B/9075B is in
Bypass mode, (AUTOBYPASS = HIGH and/or BYPASS = HIGH), DDO_MUTE will have no
effect on the output.
GS1575B / GS9075B HD-LINX® II Multi-Rate SDI
Automatic Reclocker
Data Sheet
40063 - 1
June 2009
22 of 28
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