LMH0346 Datasheet, PDF (13/23 Pages) Texas Instruments – HD/SD SDI Reclocker with Dual Differential Outputs

LMH0346
www.ti.com
SNLS248J – APRIL 2007 – REVISED APRIL 2013
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 compatible clock signal may be input to XTAL IN/EXT CLK. Parameters for a
suitable crystal are given in Table 3.
Table 3. Crystal Parameters
Parameter
Frequency
Frequency Stability
Operating Mode
Load Capacitance
Shunt Capacitance
Series Resistance
Recommended Drive Level
Maximum Drive Level
Operating Temperature Range
Value
27 MHz
±50 ppm @ recommended drive level
Fundamental mode, Parallel Resonant
18–20 pF
7 pF
40Ω max.
100 µW
500 µW
−10°C to +60°C
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