19-5138; Rev 3; 1/11
Gigabit Multimedia Serial Link
Serializer with LVDS System Interface
General Description
Features
S Pairs with Any GMSL Deserializer
The MAX9249 serializer with LVDS system interface
utilizes Maxim’s Gigabit multimedia serial link (GMSL)
technology. The MAX9249 serializer pairs with any
GMSL deserializer to form a complete digital serial link
for joint transmission of high-speed video, audio, and
control data.
S 2.5Gbps Payload Rate AC-Coupled Serial Link
with 8B/10B Line Coding
S Supports Up to WXGA (1280 x 800) with 24-Bit
Color
S 8.33MHz to 104MHz (3-Channel LVDS) or 6.25MHz
to 78MHz (4-Channel LVDS) Input Clock
S 4-Bit to 32-Bit Word Length, 8kHz to 192kHz I2S
The MAX9249 allows a maximum serial payload data rate
of 2.5Gbps for a 15m shielded twisted-pair (STP) cable.
The serializer operates up to a maximum clock rate of
104MHz (3-channel LVDS) or 78MHz (4-channel LVDS).
This serial link supports display panels from QVGA (320
x 240) to WXGA (1280 x 800) and higher with 24-bit color.
Audio Channel Supports High-Definition Audio
S Embedded Half-/Full-Duplex Bidirectional Control
Channel (100kbps to 1Mbps)
S Interrupt Supports Touch-Screen Functions for
Display Panels
S Remote-End I2C Master for Peripherals
The 3-channel mode handles three lanes of LVDS data
(21 bits), UART control signals, and three audio signals.
The 4-channel mode handles four lanes of LVDS data
(28 bits), UART control signals, three audio signals,
and/or up to three auxiliary parallel inputs. The three
audio inputs form a standard I2S interface, supporting
sample rates from 8kHz to 192kHz and audio word
lengths of 4 to 32 bits. The embedded control chan-
nel forms a full-duplex, differential, 100kbps to 1Mbps
UART link between the serializer and deserializer. The
electronic control unit (ECU), or microcontroller (FC), can
be located on the MAX9249 side of the link (typical for
video display), on the deserializer side of the link (typi-
cal for image sensing), or on both sides. In addition, the
control channel enables ECU/FC control of peripherals
on the remote side, such as backlight control, grayscale
Gamma correction, camera module, and touch screen.
Base-mode communication with peripherals uses either
I2C or the GMSL UART format. A bypass mode enables
full-duplex communication using custom UART formats.
S Preemphasis Line Driver
S Programmable Spread Spectrum on the Serial
Outputs for Reduced EMI
S Automatic Data-Rate Detection Allows “On-the-
Fly” Data-Rate Change
S Input Clock PLL Jitter Attenuator
S Built-In PRBS Generator for BER Testing of the
Serial Link
S Line-Fault Detector Detects Serial Link Shorts to
Ground, Battery, or Open Link
S ISO 10605 and IEC 61000-4-2 ESD Protection
S -40NC to +105NC Operating Temperature Range
S 1.8V to 3.3V I/O, 1.8V Core, and 3.3V LVDS
Supplies
S Patent Pending
The MAX9249 serializer driver preemphasis, along with
the channel equalizer on the GMSL deserializer, extends
the link length and enhances the link reliability. Spread
spectrum is available on the MAX9249 to reduce EMI on
the serial link and the parallel output of the GMSL dese-
rializer. The serial output complies with ISO 10605 and
IEC 61000-4-2 ESD protection standards.
Applications
High-Resolution Automotive Navigation
Rear-Seat Infotainment
Megapixel Camera Systems
Ordering Information
The core supply for the MAX9249 is 1.8V. The I/O supply
ranges from 1.8V to 3.3V. The MAX9249 is available in
a 48-pin TQFP package (7mm x 7mm) with an exposed
pad. Electrical performance is guaranteed over the
-40NC to +105NC automotive temperature range.
PART
TEMP RANGE
PIN-PACKAGE
MAX9249GCM/V+
MAX9249GCM/V+T
-40NC to +105NC 48 TQFP-EP*
-40NC to +105NC 48 TQFP-EP*
/V denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
T = Tape and reel.
_______________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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