LMH0056SQ/NOPB National Semiconductor, LMH0056SQ/NOPB Datasheet - Page 13

• Manufacturer Part Number: LMH0056SQ/NOPB
• Description: IC RECLOCKER HD/SD SDI 48-LLP
• Manufacturer: National Semiconductor
• Type: Reclockerr

Specifications of LMH0056SQ/NOPB

• Applications: SDTV/HDTV
• Mounting Type: Surface Mount
• Package / Case: 48-LLP
• For Use With: SD056EVK - BOARD EVALUATION LMH0056
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMH0056SQ; LMH0056SQTR

SCO_EN
Input SCO_EN enables the SCO/SDO2 differential output to
function either as a serial data-rate clock or second serial data
output. SCO/SDO2 functions as a serial data-rate 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.
CRYSTAL OR EXTERNAL CLOCK REFERENCE
The LMH0056 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 4.
Frequency
Frequency Stability
Parameter
TABLE 4. Crystal Parameters
27 MHz
±50 ppm @ recommended
drive level
Value
13
Operating Mode
Load Capacitance
Shunt Capacitance
Series Resistance
Recommended Drive Level
Maximum Drive Level
Operating Temperature
Range
Parameter
Fundamental mode, Parallel
Resonant
20 pF
7 pF
40Ω max.
100 µW
500 µW
−10°C to +60°C
Value
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