LMH0036SQX/NOPB National Semiconductor, LMH0036SQX/NOPB Datasheet - Page 9

IC RECLOCKER SD 4:1 MUX 48LLP

LMH0036SQX/NOPB

Manufacturer Part Number
LMH0036SQX/NOPB
Description
IC RECLOCKER SD 4:1 MUX 48LLP
Manufacturer
National Semiconductor
Type
Reclockerr
Datasheet

Specifications of LMH0036SQX/NOPB

Applications
SDTV/HDTV
Mounting Type
Surface Mount
Package / Case
48-LLP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LMH0036SQX
LOCK DETECT
SD
The SD output indicates that the LMH0036 is locked and pro-
cessing SD data rates. It may be used to control another
device such as the LMH0002 cable driver. When this output
is high it indicates that the data rate is 270 Mbps. The SD
output is a registered function and is only valid when the PLL
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 LMH0036 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.
Frequency
Frequency Stability
X
0
1
0
1
Parameter
TABLE 3. Crystal Parameters
OUTPUT MUTE
LOCK DETECT
LOCK DETECT
1
1
0
27 MHz
±100 ppm @ recommended
drive level
BYPASS/AUTO BYPASS
FIGURE 3. SDI, Lock Detect, and SD Timing
Value
TABLE 2. Control Functionality
X
X
X
0
0
9
PLL unlocked, reclocker bypassed
PLL locked to supported data rate, reclocker not bypassed
Outputs muted
Outputs muted
PLL locked to supported data rate, reclocker not bypassed
is locked and the Lock Detect output is high. The SD output
is undefined for a short time after lock detect assertion or de-
assertion due to a data change on the SDI input. See Figure
3 for a timing diagram showing the relationship between SDI,
Lock Detect, and SD.
Operating Mode
Load Capacitance
Shunt Capacitance
Series Resistance
Recommended Drive Level
Maximum Drive Level
Operating Temperature
Range
Parameter
DEVICE STATUS
Fundamental mode, Parallel
Resonant
20 pF
7 pF
40Ω max.
100 µW
500 µW
−10°C to +60°C
Value
30003105
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