19-3680; Rev 1; 12/07
KIT
ATION
EVALU
BLE
AVAILA
10-Bit, Low-Power, 10MHz-to-20MHz
Serializer and Deserializer Chipset
Features
♦
Ideal for Serializing Cell Phone Camera Parallel
Interface
♦
MAX9225 Serializes 8-Bit YUV, HSYNC, and VSYNC
♦
LCDS Rejects Common-Mode Noise
♦
Automatic Location of Word Boundary After
Signal Interruption
♦
Power-Down Control Through the Serial Link
♦
Power-Down Supply Current
0.5µA (max) for MAX9225
3.0µA (max) for MAX9226
♦
+2.375V to +3.465V Core Supply Voltage
♦
Parallel I/O Interfaces Directly to 1.8V to 3.3V Logic
♦
±15kV Human Body Model ESD Protection
♦
-40°C to +85°C Operating Temperature Range
General Description
The MAX9225/MAX9226 serializer/deserializer chipset
reduces wiring by serializing 10 bits onto a single differ-
ential pair. Ten bits are serialized in each cycle of the
parallel input clock resulting in a 100Mbps to 200Mbps
net serial-data rate. The MAX9225 serializes the 8-bit
YUV, HSYNC and VSYNC outputs from a camera mount-
ed in the flip part of the phone, reducing wiring through
the hinge to the baseband processor in the base of the
phone. The 2-wire serial interface uses low-current differ-
ential signaling (LCDS) for low EMI, high common-mode
noise immunity, and ground-shift tolerance. The
MAX9225/MAX9226 automatically identify the word
boundary in the serial data in case of signal interruption.
The MAX9226 power-down is controlled by the
MAX9225. The MAX9225/MAX9226 consume 3.5µA or
less in power-down mode.
The MAX9225 serializer operates from a single +2.375V
to +3.465V supply and accepts +1.71V to +3.465V
inputs. The MAX9226 deserializer operates from a
+2.375V to +3.465V core supply and has a separate
output buffer supply (V
DDO
), allowing +1.71V to
+3.465V output high levels.
The MAX9225/MAX9226 are specified over the -40°C to
+85°C extended temperature range and are available
in 16-pin TQFN (3mm x 3mm x 0.8mm) packages with
an exposed paddle.
MAX9225/MAX9226
Ordering Information
PART
MAX9225
ETE
MAX9226
ETE
TEMP
RANGE
PIN-
PACKAGE
PKG
TOP
CODE MARK
-40°C to +85°C 16 TQFN-EP* T1633-4 ADO
-40°C to +85°C 16 TQFN-EP* T1633-4 ADX
MAX9225ETE+ -40°C to +85°C 16 TQFN-EP* T1633-4 ADO
MAX9226ETE+ -40°C to +85°C 16 TQFN-EP* T1633-4 ADX
Applications
Cell Phone Cameras
Digital Cameras
+Denotes
lead-free package.
*EP
= Exposed paddle.
Pin Configurations appear at end of data sheet.
Typical Application Circuit
LCDS
PARALLEL
DATA IN
INPUT
LATCH
PARALLEL
TO
SERIAL
SERIAL
TO
PARALLEL
OUTPUT
LATCH
PARALLEL
DATA OUT
PIXEL
CLOCK IN
TIMING
AND
CONTROL
POWER-DOWN
CONTROL
TIMING AND CONTROL
DLL
PIXEL
CLOCK OUT
MAX9225
MAX9226
________________________________________________________________
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.
10-Bit, Low-Power, 10MHz-to-20MHz
Serializer and Deserializer Chipset
MAX9225/MAX9226
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND ...........................................................-0.5V to +4.0V
V
DDO
to GND.........................................................-0.5V to +4.0V
Serial Interface (SDO+, SDO-, SDI+,
SDI-) to GND .....................................................-0.5V to +4.0V
Single-Ended Inputs (DIN_, PCLKIN,
PWRDN)
to GND ....................................-0.5V to (V
DD
+ 0.5V)
Single-Ended Outputs (DOUT_,
PCLKOUT) to GND ..............................-0.5V to (V
DDO
+ 0.5V)
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TQFN (3mm x 3mm x 0.8mm)
Multilayer PCB (derate 20.8mW/°C
above +70°C).............................................................1667mW
Single-Layer PCB (derate 15.6mW/°C
above +70°C).............................................................1250mW
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
ESD Protection (Human Body Model)
SDO+, SDO-, SDI+, SDI- to GND ...............................> ±15kV
All Other Pins to GND ...................................................> ±2kV
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 (MAX9225)
(V
DD
= +2.375V to +3.465V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= +2.5V, T
A
= +25°C.) (Notes 1, 2)
PARAMETER
High-Level Input Voltage
Low-Level Input Voltage
Input Current
LCDS OUTPUT (SDO+, SDO-)
Differential Output Current
Output Short-Circuit Current
POWER SUPPLY
PCLKIN = 10MHz,
100Mbps
Supply Current
I
DD
V
DD
= 2.5V
PCLKIN = 20MHz,
200Mbps
PCLKIN = 10MHz,
100Mbps
PCLKIN = 20MHz,
200Mbps
4.7
6.2
4.7
6.2
8.2
mA
8.2
10.6
mA
10.6
0.5
µA
I
ODH
I
ODL
I
OS
High level
Low level
Shorted to 0V or V
DD
575
200
643
229
880
300
880
µA
µA
SYMBOL
V
IH
V
IL
V
IN
= 0V to V
DD
I
IN
-0.3V
≤
V
IN
<
0V
V
DD
<
V
IN
≤
(V
DD
+ 0.3V)
CONDITIONS
MIN
1.19
-0.3
-20
-100
TYP
MAX
V
DD
+ 0.3
+0.3
+20
+100
µA
UNITS
V
V
SINGLE-ENDED INPUTS (PCLKIN, DIN_,
PWRDN)
Worst-Case Pattern Supply Current
I
DDW
V
DD
= 2.5V,
Figure 1
All inputs = low
Power-Down Supply Current
I
DDZ
2
_______________________________________________________________________________________
10-Bit, Low-Power, 10MHz-to-20MHz
Serializer and Deserializer Chipset
DC ELECTRICAL CHARACTERISTICS (MAX9226)
(V
DD
= +2.375V to +3.465V, V
DDO
= +1.71V to +3.465V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
=
V
DDO
= +2.5V, T
A
= +25°C.) (Notes 1, 2)
PARAMETER
High-Level Output Voltage
Low-Level Output Voltage
Output Short-Circuit Current
LCDS INPUT (SDI+, SDI-)
Differential Input-Current Threshold
Common-Mode Input Current
I
ID
I
IC
I
IC
= 0µA, V
DD
= 3.3V ±5%
I
IC
= 0µA, V
DD
= 2.8V ±5%
Differential Input Impedance
Z
ID
I
IC
= 0µA, V
DD
= 2.5V ±5%
I
IC
= ±300µA, V
DD
= 3.3V ±5%
I
IC
= ±300µA, V
DD
= 2.8V ±5%
Common-Mode Input Impedance
Input Capacitance
POWER SUPPLY
V
DD
= V
DDO
= 2.5V
(Note 4)
PCLKOUT = 10MHz,
100Mbps
PCLKOUT = 20MHz,
200Mbps
PCLKOUT = 10MHz,
100Mbps
PCLKOUT = 20MHz,
200Mbps
-5
-0.2
8.4
9.1
9.7
11.6
0.3
12
mA
12
12
mA
13
3.0
+5
+0.2
µA
%
V
Z
IC
C
IN
I
IC
= ±300µA
SDI+ or SDI- to ground
-300
69
82
95
67
86
90
400
±400
90
108
125
91
108
167
2
+300
114
137
161
117
141
375
Ω
pF
Ω
µA
µA
SYMBOL
V
OH
V
OL
I
OS
CONDITIONS
V
DDO
= +2.375V to +3.465V, I
OH
= -1mA
V
DDO
= +2.375V to +3.465V, I
OL
= 1mA
Output shorted
to ground
V
DDO
= 2.375V
V
DDO
= 3.135V
V
DDO
= 3.465V
-2
-9
-25
mA
MIN
0.8 x V
DDO
0.2
TYP
MAX
UNITS
V
V
SINGLE-ENDED OUTPUTS (PCLKOUT, DOUT_)
MAX9225/MAX9226
Supply Current
I
TOT
Worst-Case Pattern
Supply Current
Power-Down Supply Current
Supply Difference
GROUND POTENTIAL
Ground Difference
I
TOTW
C
L
= 5pF, V
DD
=
V
DDO
= 2.5V,
Figure 2 (Note 4)
(Note 4)
I
TOTZ
V
SD
V
GD
MAX9225 V
DD
to MAX9226 V
DD
MAX9225 to MAX9226 ground difference
_______________________________________________________________________________________
3
10-Bit, Low-Power, 10MHz-to-20MHz
Serializer and Deserializer Chipset
MAX9225/MAX9226
AC ELECTRICAL CHARACTERISTICS (MAX9225)
(V
DD
= +2.375V to +3.465V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= +2.5V, T
A
= +25°C.) (Note 3)
PARAMETER
Input Rise Time
Input Fall Time
PCLKIN Period
High-Level Pulse Width
Low-Level Pulse Width
Setup Time
Hold Time
SYMBOL
t
R
t
F
t
P
t
PWH
t
PWL
t
S
t
H
50
0.3 x t
P
0.3 x t
P
3
1
CONDITIONS
MIN
TYP
MAX
2
2
100
0.7 x t
P
0.7 x t
P
UNITS
ns
ns
ns
ns
ns
ns
ns
PCLKIN INPUT REQUIREMENTS (Figure 3)
AC ELECTRICAL CHARACTERISTICS (MAX9226)
(V
DD
= V
DDO
= +2.375V to +3.465V, C
L
= 5pF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= V
DDO
=
+2.5V, T
A
= +25°C.) (Notes 3, 5)
PARAMETER
PCLKOUT Period
High-Level Pulse Width
Low-Level Pulse Width
Data Valid Before PCLKOUT
Data Valid After PCLKOUT
SERIALIZER AND DESERIALIZER LINK
t
PU1
Power-Up Time
t
PU2
Power-Down Time
t
PWRDN
From V
DD
= V
DDO
= 2.375V when supplies
are ramping up
From
PWRDN
low to high
From
PWRDN
high to low
2.8
11,264 x
t
P
4096 x
t
P
10
SYMBOL
t
P
t
PWH
t
PWL
t
VB
t
VA
Figure 4
Figure 4
Figure 4
Figure 4
Figure 4
CONDITIONS
MIN
50
0.4 x t
P
0.4 x t
P
5
5
TYP
MAX
100
0.6 x t
P
0.6 x t
P
UNITS
ns
ns
ns
ns
ns
ns
µs
Note 1:
Current into a pin is defined as positive. Current out of a pin is defined as negative. All voltages are referenced to ground.
Note 2:
Maximum and minimum limits over temperature are guaranteed by design and characterization. Devices are production
tested at T
A
= +85°C.
Note 3:
Parameters are guaranteed by design and characterization and are not production tested. Limits are set at ±6 sigma.
Note 4:
I
TOT
= I
DD
+ I
DDO
.
Note 5:
C
L
includes probe and test jig capacitance.
4
_______________________________________________________________________________________
10-Bit, Low-Power, 10MHz-to-20MHz
Serializer and Deserializer Chipset
MAX9225/MAX9226
Test Circuits/Timing Diagrams
ODD DIN_
EVEN DIN_
PCLKIN
ODD DOUT_
EVEN DOUT_
PCLKOUT
Figure 1. Serializer Worst-Case Switching Pattern
Figure 2. Deserializer Worst-Case Switching Pattern
t
P
t
PWL
V
IH
PCLKIN
t
F
t
PWH
V
IH
V
IH
V
IL
V
IL
t
R
t
S
t
H
V
IH
V
IL
DIN_
PWRDN
V
IH
V
IL
V
IH
IS THE MINIMUM HIGH-LEVEL INPUT, AND V
IL
IS THE MAXIMUM LOW-LEVEL INPUT (SEE THE
DC ELECTRICAL CHARACTERISTICS
TABLE)
Figure 3. Serializer Input Timing
t
P
t
PWL
V
OH
PCLKOUT
V
OL
V
OL
V
OH
t
PWH
V
OH
t
VB
DOUT_
V
OH
V
OL
t
VA
V
OH
V
OL
V
OH
IS THE MINIMUM HIGH-LEVEL OUTPUT, AND V
OL
IS THE MAXIMUM LOW-LEVEL OUTPUT (SEE THE
DC ELECTRICAL CHARACTERISTICS
TABLE)
Figure 4. Deserializer Output Timing
_______________________________________________________________________________________
5
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