19-3955; Rev 4; 4/12
27-Bit, 2.5MHz-to-42MHz
DC-Balanced LVDS Serializer
MAX9247
General Description
Features
o Preemphasis Improves Eye Diagram and Signal
The MAX9247 digital video parallel-to-serial converter
serializes 27 bits of parallel data into a serial-data stream.
Eighteen bits of video data and 9 bits of control data are
encoded and multiplexed onto the serial interface, reduc-
ing the serial-data rate. The data-enable input determines
when the video or control data is serialized.
Integrity at the Output
o Proprietary Data Encoding for DC Balance and
Reduced EMI
o Control Data Sent During Video Blanking
o Five Control Data Inputs are Single-Bit-Error
Tolerant
The MAX9247 pairs with the MAX9248/MAX9250 dese-
rializers to form a complete digital video serial link.
Interconnect can be controlled-impedance PCB traces or
twisted-pair cable. Proprietary data encoding reduces
EMI and provides DC balance. DC balance allows AC-
coupling, providing isolation between the transmitting
and receiving ends of the interface. The LVDS output is
internally terminated with 100Ω. For operating frequen-
cies less than 35MHz, the MAX9247 can also pair with
the MAX9218 deserializer.
o Programmable Phase-Shifted LVDS Signaling
Reduces EMI
o Output Common-Mode Filter Reduces EMI
o Greater Than 10m STP Cable Drive
o Wide ±±2 Reference Clock Tolerance
o ISO 10605 and IEC 61000-4-± Level 4
ESD Protection
o Separate Input Supply Allows Interface to 1.8V
to 3.3V Logic
ESD tolerance is specified for ISO 10605 with 10kV
Contact Discharge and 30kV Air-ꢀap Discharge.
o +3.3V Core Supply
o Space-Saving LQFP Package
The MAX9247 operates from a +3.3V core supply and
features a separate input supply for interfacing to 1.8V
to 3.3V logic levels. This device is available in a 48-lead
LQFP package and is specified from -40°C to +85°C or
-40°C to +105°C.
o -40°C to +85°C and -40°C to +105°C Operating
Temperature Ranges
Ordering Information
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +105°C
-40°C to +105°C
PIN-PACKAGE
48 LQFP
Applications
MAX9247ECM+
MAX9247ECM/V+
MAX9247ꢀCM+
MAX9247ꢀCM/V+
Navigation System Displays
In-Vehicle Entertainment Systems
Video Cameras
48 LQFP
48 LQFP
48 LQFP
LCDs
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Pin Configuration
TOP VIEW
+
GND
1
2
3
4
5
6
7
8
9
36 RNG0
35 RNG1
V
CCIN
RGB_IN10
34
V
CCLVDS
RGB_IN11
RGB_IN12
RGB_IN13
RGB_IN14
RGB_IN15
RGB_IN16
33 OUT+
32 OUT-
31 LVDSGND
30 LVDSGND
29 CMF
MAX9247
28 PWRDWN
RGB_IN17 10
27
26
25
V
CCPLL
CNTL_IN0
CNTL_IN1
PLLGND
PRE
11
12
LQFP
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-6±9-464±,
or visit Maxim’s website at www.maxim-ic.com.