19-5138; Rev 3; 1/11
TION KIT
EVALUA BLE
AVAILA
Gigabit Multimedia Serial Link
Serializer with LVDS System Interface
General Description
Features
S
Pairs with Any GMSL Deserializer
S
2.5Gbps Payload Rate AC-Coupled Serial Link
MAX9249
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.
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.
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 I
2
S 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
I
2
C or the GMSL UART format. A bypass mode enables
full-duplex communication using custom UART formats.
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.
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.
with 8B/10B Line Coding
Color
S
Supports Up to WXGA (1280 x 800) with 24-Bit
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 I
2
S
Audio Channel Supports High-Definition Audio
Channel (100kbps to 1Mbps)
Display Panels
S
Embedded Half-/Full-Duplex Bidirectional Control
S
Interrupt Supports Touch-Screen Functions for
S
Remote-End I
2
C Master for Peripherals
S
Preemphasis Line Driver
S
Programmable Spread Spectrum on the Serial
Outputs for Reduced EMI
Fly” Data-Rate Change
S
Automatic Data-Rate Detection Allows “On-the-
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
Applications
High-Resolution Automotive Navigation
Rear-Seat Infotainment
Megapixel Camera Systems
Ordering Information
PART
MAX9249GCM/V+
MAX9249GCM/V+T
TEMP RANGE
-40NC to +105NC
-40NC to +105NC
PIN-PACKAGE
48 TQFP-EP*
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.
Gigabit Multimedia Serial Link
Serializer with LVDS System Interface
MAX9249
ABSOLUTE MAXIMUM RATINGS
AVDD to AGND ....................................................-0.5V to +1.9V
LVDSVDD to AGND..............................................-0.5V to +3.9V
DVDD to GND ......................................................-0.5V to +1.9V
IOVDD to GND .....................................................-0.5V to +3.9V
Any Ground to Any Ground .................................-0.5V to +0.5V
RXIN_ _, RXCLKIN_ to AGND ..............................-0.5V to +3.9V
OUT+, OUT- to AGND .........................................-0.5V to +1.9V
LMN_ to GND (15mA current limit) ......................-0.5V to +3.9V
All Other Pins to Any Ground .............. -0.5V to (V
IOVDD
+ 0.5V)
OUT+, OUT- Short Circuit to Ground or Supply .......Continuous
Continuous Power Dissipation (
TA
= +70NC)
48-Pin TQFP (derate 36.2mW/NC above +70NC)....2898.6mW
ESD Protection
Human Body Model (R
D
= 1.5kω, C
S
= 100pF)
(RXIN_ _, RXCLKIN_, OUT+, OUT-) to GND...................±8kV
All Other Pins to GND......................................................±3kV
IEC 61000-4-2 (R
D
= 330ω, C
S
= 150pF)
Contact Discharge
(RXIN_ _, RXCLKIN_) to GND .........................................±4kV
(OUT+, OUT-) to GND ...................................................±10kV
Air Discharge
(RXIN_ _, RXCLKIN_) to GND .........................................±8kV
(OUT+, OUT-) to GND ...................................................±12kV
ISO 10605 (R
D
= 2kω, C
S
= 330pF)
Contact Discharge
(RXIN_ _, RXCLKIN_) to GND .........................................±6kV
(OUT+, OUT-) to GND ...................................................±10kV
Air Discharge
(RXIN_ _, RXCLKIN_) to GND .......................................±20kV
(OUT+, OUT-) to GND ...................................................±30kV
Operating Temperature Range ........................ -40NC to +105NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
PACKAGE THERMAL CHARACTERISTICS (Note 1)
48 TQFP-EP
Junction-to-Ambient Thermal Resistance (θ
JA
) .......27.6NC/W
Junction-to-Case Thermal Resistance (θ
JC
).................2NC/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to
www.maxim-ic.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(V
DVDD
= V
AVDD
= 1.7V to 1.9V, V
LVDSVDD
= 3.0V to 3.6V, V
IOVDD
= 1.7V to 3.6V, R
L
= 100I ±1% (differential), T
A
= -40NC to
+105NC, unless otherwise noted. Differential input voltage |V
ID
| = 0.1V to 1.2V, input common-mode voltage V
CM
= |V
ID
/2| to 2.4V
- |V
ID
/2|. Typical values are at V
DVDD
= V
AVDD
= V
IOVDD
= 1.8V, V
LVDSVDD
= 3.3V, T
A
= +25NC.)
PARAMETER
SYMBOL
CONDITIONS
MIN
0.65 x
V
IOVDD
0.7 x
V
IOVDD
0.35 x
V
IOVDD
V
IN
= 0 to V
IOVDD
I
CL
= -18mA
V
IOVDD
-
0.2
0.2
V
IOVDD
= 3.0V to 3.6V
V
IOVDD
= 1.7V to 1.9V
16
3
35
12
64
21
-10
+10
-1.5
TYP
MAX
UNITS
SINGLE-ENDED INPUTS (PWDN, SSEN, BWS, DRS, MS, CDS,
AUTOS,
SD/CNTL0, SCK, WS, CNTL_)
PWDN,
SSEN, BWS, DRS, MS, CDS,
AUTOS
High-Level Input Voltage
V
IH1
SD/CNTL0, SCK, WS, CNTL_
Low-Level Input Voltage
Input Current
Input Clamp Voltage
SINGLE-ENDED OUTPUT (INT)
High-Level Output Voltage
Low-Level Output Voltage
Output Short-Circuit Current
V
OH1
V
OL1
I
OS
I
OH
= -2mA
I
OL
= 2mA
V
O
= 0V
V
V
mA
V
IL1
I
IN1
V
CL
V
V
FA
V
2
______________________________________________________________________________________
Gigabit Multimedia Serial Link
Serializer with LVDS System Interface
DC ELECTRICAL CHARACTERISTICS (continued)
(V
DVDD
= V
AVDD
= 1.7V to 1.9V, V
LVDSVDD
= 3.0V to 3.6V, V
IOVDD
= 1.7V to 3.6V, R
L
= 100I ±1% (differential), T
A
= -40NC to
+105NC, unless otherwise noted. Differential input voltage |V
ID
| = 0.1V to 1.2V, input common-mode voltage V
CM
= |V
ID
/2| to 2.4V
- |V
ID
/2|. Typical values are at V
DVDD
= V
AVDD
= V
IOVDD
= 1.8V, V
LVDSVDD
= 3.3V, T
A
= +25NC.)
PARAMETER
SYMBOL
CONDITIONS
MIN
0.7 x
V
IOVDD
0.3 x
V
IOVDD
V
IN
= 0 to V
IOVDD
(Note 2)
I
OL
= 3mA
V
IOVDD
= 1.7V to 1.9V
V
IOVDD
= 3.0V to 3.6V
300
350
240
400
-110
+5
0.4
0.3
500
610
425
15
Preemphasis off
1.1
1.4
1.56
15
V
OUT+
or V
OUT-
= 0V
V
OUT+
or V
OUT-
= 1.9V
V
OD
= 0V
From OUT+, OUT- to V
AVDD
45
54
-60
25
25
63
mV
V
mV
mA
mA
I
mV
TYP
MAX
UNITS
I
2
C AND UART I/O, OPEN-DRAIN OUTPUT (RX/SDA, TX/SCL,
LFLT)
High-Level Input Voltage
Low-Level Input Voltage
Input Current
Low-Level Open-Drain Output
Voltage
V
IH2
V
IL2
I
IN2
V
OL2
V
V
FA
V
MAX9249
DIFFERENTIAL OUTPUT (OUT+, OUT-)
Preemphasis off (Figure 1)
Differential Output Voltage
V
OD
3.3dB preemphasis setting, V
OD(P)
(Figure 2)
3.3dB deemphasis setting, V
OD(D)
(Figure 2)
Change in V
OD
Between
Complementary Output States
Output Offset Voltage
(V
OUT+
+ V
OUT-
)/2 = V
OS
Change in V
OS
Between
Complementary Output States
Output Short-Circuit Current
Magnitude of Differential Output
Short-Circuit Current
Output Termination Resistance
(Internal)
High Switching Threshold
Low Switching Threshold
Short-to-GND Threshold
Normal Thresholds
Open Thresholds
Open Input Voltage
Short-to-Battery Threshold
LVDS INPUTS (RXIN_ _, RXCLKIN_)
Differential Input High Threshold
Differential Input Low Threshold
V
TH
V
TL
-50
50
mV
mV
DV
OD
V
OS
DV
OS
I
OS
I
OSD
R
O
REVERSE CONTROL-CHANNEL RECEIVER (OUT+, OUT-)
V
CHR
V
CLR
V
TG
V
TN
V
TO
V
IO
V
TE
Figure 3
Figure 3
Figure 3
Figure 3
Figure 3
0.57
1.45
1.47
2.47
-27
0.3
1.07
V
IO
+
60mV
1.75
27
mV
mV
V
V
V
V
LINE-FAULT DETECTION INPUT (LMN_)
_______________________________________________________________________________________
3
Gigabit Multimedia Serial Link
Serializer with LVDS System Interface
MAX9249
DC ELECTRICAL CHARACTERISTICS (continued)
(V
DVDD
= V
AVDD
= 1.7V to 1.9V, V
LVDSVDD
= 3.0V to 3.6V, V
IOVDD
= 1.7V to 3.6V, R
L
= 100I ±1% (differential), T
A
= -40NC to
+105NC, unless otherwise noted. Differential input voltage |V
ID
| = 0.1V to 1.2V, input common-mode voltage V
CM
= |V
ID
/2| to 2.4V
- |V
ID
/2|. Typical values are at V
DVDD
= V
AVDD
= V
IOVDD
= 1.8V, V
LVDSVDD
= 3.3V, T
A
= +25NC.)
PARAMETER
Input Differential Termination
Resistance
Input Current
Power-Off Input Current
POWER SUPPLY
f
RXCLKIN_
= 16.6MHz
Worst-Case Supply Current
(Figure 4)
Sleep-Mode Supply Current
Power-Down Supply Current
I
WCS
BWS = GND
f
RXCLKIN_
= 33.3MHz
f
RXCLKIN_
= 66.6MHz
f
RXCLKIN_
= 104MHz
I
CCS
I
CCZ
LVDS inputs are not driven
PWDN
= GND, LVDS inputs are not driven
125
135
150
175
45
5
165
175
190
220
125
80
FA
FA
mA
SYMBOL
R
TERM
PWDN
= high or low, IN+ and IN- are shorted
I
IN0+
, I
IN0-
V
AVDD
= V
DVDD
= V
IOVDD
= 0V
I
IN+
, I
IN-
CONDITIONS
MIN
85
-25
-40
TYP
110
MAX
135
+25
+40
UNITS
I
FA
FA
AC ELECTRICAL CHARACTERISTICS
(V
DVDD
= V
AVDD
= 1.7V to 1.9V, V
IOVDD
= 1.7V to 3.6V, R
L
= 100I ±1% (differential), T
A
= -40NC to +105NC, unless otherwise
noted. Differential input voltage |V
ID
| = 0.15V to 1.2V, input common-mode voltage V
CM
= |V
ID
/2| to 2.4V - |V
ID
/2|. Typical values are
at V
DVDD
= V
AVDD
= V
IOVDD
= 1.8V, V
LVDSVDD
= 3.3V, T
A
= +25NC.)
PARAMETER
CLOCK INPUT (RXCLKIN_)
BWS = GND, V
DRS
= V
IOVDD
BWS = GND, DRS = GND
V
BWS
= V
IOVDD
, V
DRS
= V
IOVDD
V
BWS
= V
IOVDD
, DRS = GND
30% to 70%, C
L
= 10pF to 100pF,
1kI pullup to IOVDD
70% to 30%, C
L
= 10pF to 100pF,
1kI pullup to IOVDD
I
2
C only (Figure 5)
I
2
C only (Figure 5)
20% to 80%, V
OD
≥ 400mV, R
L
= 100I,
serial-bit rate = 3.125Gbps (Note 3)
3.125Gbps PRBS signal, measured at V
OD
= 0V differential, preemphasis disabled
(Figure 6)
3.125Gbps PRBS signal
CNTL_ (Figure 7)
CNTL_ (Figure 7)
Figure 8
3
1.5
0.3
8.33
16.66
6.25
12.5
16.66
104
12.5
78
MHz
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Clock Frequency
f
RXCLKIN_
I
2
C/UART PORT TIMING (Note 3)
Output Rise Time
Output Fall Time
Input Setup Time
Input Hold Time
t
R
t
F
t
SET
t
HOLD
20
20
100
0
150
150
ns
ns
ns
ns
SWITCHING CHARACTERISTICS (Note 3)
Differential Output Rise/Fall Time
t
R
, t
F
90
150
ps
Total Serial Output Jitter
Deterministic Serial Output Jitter
CNTL_ Input Setup Time
CNTL_ Input Hold Time
RXIN_ _ Skew Margin
t
TSOJ1
t
DSOJ2
t
SET
t
HOLD
t
RSKM
0.25
0.15
UI
UI
ns
ns
UI
4
______________________________________________________________________________________
Gigabit Multimedia Serial Link
Serializer with LVDS System Interface
AC ELECTRICAL CHARACTERISTICS (continued)
(V
DVDD
= V
AVDD
= 1.7V to 1.9V, V
IOVDD
= 1.7V to 3.6V, R
L
= 100I ±1% (differential), T
A
= -40NC to +105NC, unless otherwise
noted. Differential input voltage |V
ID
| = 0.15V to 1.2V, input common-mode voltage V
CM
= |V
ID
/2| to 2.4V - |V
ID
/2|. Typical values are
at V
DVDD
= V
AVDD
= V
IOVDD
= 1.8V, V
LVDSVDD
= 3.3V, T
A
= +25NC.)
PARAMETER
Serializer Delay (Note 4)
Link Start Time
Power-Up Time
I
2
S INPUT TIMING
WS Frequency
Sample Word Length
SCK Frequency
SCK Clock High Time (Note 3)
SCK Clock Low Time (Note 3)
SD/CNTL0, WS Setup Time
SD/CNTL0, WS Hold Time
f
WS
n
WS
f
SCK
t
HC
t
LC
t
SET
t
HOLD
Table 3
Table 3
f
SCK
= f
WS
x n
WS
x 2
V
SCK
R
V
IH
, t
SCK
= 1/f
SCK
V
SCK
≤ V
IL
, t
SCK
= 1/f
SCK
Figure 12 (Note 3)
Figure 12 (Note 3)
8
4
(8 x 4)
x2
0.35 x
t
SCK
0.35 x
t
SCK
2
2
192
32
(192 x 32)
x2
kHz
Bits
kHz
ns
ns
ns
ns
SYMBOL
t
SD
t
LOCK
t
PU
Figure 9
Figure 10
Figure 11
CONDITIONS
Spread spectrum enabled
Spread spectrum disabled
MIN
TYP
MAX
2950
390
3.5
3.5
UNITS
Bits
ms
ms
MAX9249
Note 2:
Minimum I
IN
due to voltage drop across the internal pullup resistor.
Note 3:
Not production tested.
1
1
(BWS
=
0),
=
(BWS
=
V
IOVDD
)
Note 4:
Bit time
=
30
×
f
RXCLKIN_
40
×
f
RXCLKIN_
_______________________________________________________________________________________
5
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