lmh0346mh National Semiconductor Corporation, lmh0346mh Datasheet - Page 10

• Manufacturer Part Number: lmh0346mh
• Description: 3gbps Hd/sd Sdi Reclocker With Dual Differential Outputs
• Manufacturer: National Semiconductor Corporation

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SCO_EN
Input SCO_EN enables the SCO/SDO2 differential output to
function either as a serial clock or second serial data output.
SCO/SDO2 functions as a serial clock when SCO_EN is high.
This pin has an internal pull-down device. The default state
(low) enables the SCO/SDO2 output as a second serial data
output.
FIGURE 3. SDI, Lock Detect, and SD/HD Timing
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CRYSTAL OR EXTERNAL CLOCK REFERENCE
The LMH0346 uses a 27 MHz crystal or external clock signal
as a timing reference input. A 27 MHz parallel resonant crystal
and load network may be connected to the XTAL IN/EXT CLK
and XTAL OUT pins. Alternatively, a 27 MHz LVCMOS com-
patible clock signal may be input to XTAL IN/EXT CLK. Pa-
rameters for a suitable crystal are given in Table 3.
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