SD384EVK National Semiconductor, SD384EVK Datasheet - Page 2

• Manufacturer Part Number: SD384EVK
• Description: BOARD EVAL CABLE EQ HD/SD SDI
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of SD384EVK

• Main Purpose: Interface, Cable Equalizer
• Embedded: No
• Utilized Ic / Part: LMH0384
• Primary Attributes: 3 Gbps HD/SD SDI
• Secondary Attributes: 3.135 V ~ 3.465 V Supply
• Silicon Manufacturer: National
• Silicon Core Number: LMH0384
• Kit Application Type: Interface
• Application Sub Type: Cable Equalizer
• Kit Contents: Board Docs
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

SDI Input and SDO Output
The SDI input connector (J1) is a 75Ω BNC connector. The SDI input should conform to the SMPTE 424M,
SMPTE 292M, or SMPTE 259M standards.
The SDO output connectors (J2 and J3) are 50Ω SMA connectors. When using only one side of the output pair,
the other side should be terminated with a 50Ω SMA termination. For example, when only using the SDO output,
¯¯¯¯ should be terminated with a 50Ω SMA termination.
SDO
DC Power Connectors
The VCC and GND power connectors should be powered with a DC input voltage of 3.3V ± 5% (3.6V maximum).
SPI Mode / Pin Mode Select (JP1 – JP4)
JP1, JP2, JP3, and JP4 are used to select between SPI Mode or Pin mode. To select Pin Mode, set four jumpers
as shown in Figure 2, and to select SPI Mode, set four jumpers as shown in Figure 3. Either Pin Mode or SPI
mode must be selected for proper operation; do not leave JP1-JP4 open.
Figure 2. Pin Mode Select
Figure 3. SPI Mode Select
MUTE
(JP5)
REF
JP5 allows control of the MUTE
function and may be used in either Pin Mode or SPI Mode. MUTE
is an input
REF
REF
¯¯¯ . The MUTE
voltage used to set the threshold for CD
DC input voltage should be between 0V and 3.3V. Refer
REF
to the LMH0384 datasheet for details. Leave JP5 unconnected for normal operation.
Pin Mode Controls (JP6 – JP8)
JP6, JP7, and JP8 are used to control LMH0384 features while the device is configured for Pin Mode. Jumpers
should not be placed on JP6, JP7, or JP8 while the device is configured for SPI Mode.
¯¯¯ and MUTE (JP6)
CD
¯¯¯ ) monitoring and MUTE control. CD
¯¯¯ is high when no input signal is present. MUTE
JP6 allows Carrier Detect (CD
¯¯¯ to allow automatic mute operation based on the input
may be used to force the outputs on or off, or tied to CD
signal. To activate mute and force the outputs into a muted condition, set the jumper to pull MUTE to VCC. To turn
off mute so that the outputs will never mute, set the jumper to tie MUTE to GND. For normal operation, set the
¯¯¯ to MUTE for automatic mute control. The LMH0384 MUTE pin has an internal pulldown (to
jumper to tie CD
disable mute), so JP6 may be left unconnected and the LMH0384 will never mute.
SD384 EVK User Guide
2 of 5
Rev 1.2
© 2009, National Semiconductor Corp.