MAX7474EVKIT+ Maxim Integrated Products, MAX7474EVKIT+ Datasheet - Page 3

• Manufacturer Part Number: MAX7474EVKIT+
• Description: KIT EVAL FOR MAX7474
• Manufacturer: Maxim Integrated Products

Specifications of MAX7474EVKIT+

• Main Purpose: Video, Video Decoder
• Utilized Ic / Part: MAX7474
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The MAX7474 EV kit provides an option to set the
back-porch DC level for the video output signal.
Jumper JU3 selects the voltage source that sets the
back-porch DC level for the MAX7474 BPLVL pin. See
Table 2 for shunt positions.
Table 2. JU3 Jumper Selection (BPLVL)
* Default position.
The MAX7474 EV kit provides an option to select the
output coupling of the video output signal on the
MAX7474 EV kit for AC- or DC-coupling. Jumper JU4
selects the output coupling for the MAX7474 output.
See Table 3 for shunt positions.
Table 3. JU4 Jumper Selection (VOUT)
* Default position.
POSITION
SHUNT
1-2*
2-3
SHUNT POSITION
Not installed*
Installed
Connected to U2, pin 5
(through potentiometer
MAX7474 BPLVL PIN
Connected to BP_LVL
R4; 1.4V default)
BNC connector
_______________________________________________________________________________________
Back-Porch DC Level (BPLVL)
Output Coupling (VOUT)
MAX7474 OUTPUT
BACK-PORCH DC
DC-coupled
External reference
AC-coupled
potentiometer R4)
0 to 2.5V (set by
LEVEL
source
MAX7474 Evaluation Kit
The MAX7474 EV kit provides an RJ-45 connector to
accept a differential video input signal at the VIN RJ-
45 connector. Table 4 lists the RJ-45 connector pin
configuration.
The MAX7474 EV kit provides a 3-pin header to access
the LOB and LOS status output signals and GND. The
LOB outputs a logic-high when the color burst portion
of the video signal is not detected at the input.
Similarly, the LOS outputs a logic-high when the sync
signal of the video signal is not detected at the input.
Table 5 lists the header J1 pinout.
Table 4. RJ-45 Connector Pin
Configuration (VIN)
Table 5. Header J1 Pinout (LOB, LOS,
GND)
HEADER
J1 PIN
1
2
3
RJ-45 (VIN) PIN
RJ-45 Connector Pin Configuration (VIN)
1–6
7
8
SIGNAL LEVEL
LOB = high
LOS = high
LOB = low
LOS = low
GND
Header J1 (LOB, LOS)
No connection
Sync signal detected
Color burst detected
SIGNAL
No sync signal
No color burst
V_INN
V_INP
FUNCTION
GND
3