MAXIM MAX9225, MAX9226 User Manual

General Description

The MAX9225/MAX9226 serializer/deserializer chipset
reduces wiring by serializing 10 bits onto a single differ­ential 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 mount­ed 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 differ­ential 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.

Applications

Cell Phone Cameras

Digital Cameras

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

MAX9225/MAX9226

10-Bit, Low-Power, 10MHz-to-20MHz

Serializer and Deserializer Chipset

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

19-3680; Rev 1; 12/07

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.

EVALUATION KIT

AVAILABLE

+

Denotes lead-free package.

*

EP = Exposed paddle.

Typical Application Circuit

Pin Configurations appear at end of data sheet.

PA R T

M A X9 2 2 5 E TE - 40°C to + 85° C 16 TQ FN - E P * T1633- 4AD O

M AX 9225E TE + - 40°C to + 85° C 16 TQ FN - E P * T1633- 4AD O

M A X9 2 2 6 E TE - 40°C to + 85° C 16 TQ FN - E P * T1633- 4AD X

M AX 9226E TE + - 40°C to + 85° C 16 TQ FN - E P * T1633- 4AD X

T EM P

R A N G E

PIN -

PA C K A G E

PK G

C O D E

T O P

M A R K

PARALLEL

DATA IN

PIXEL

CLOCK IN

INPUT

LATCH

MAX9225 MAX9226

PARALLEL

TO

SERIAL

TIMING

AND

CONTROL

DLL

LCDS

POWER-DOWN
CONTROL

SERIAL

TO

PARALLEL

TIMING AND CONTROL

OUTPUT

LATCH

PARALLEL
DATA OUT

PIXEL
CLOCK OUT

MAX9225/MAX9226

10-Bit, Low-Power, 10MHz-to-20MHz
Serializer and Deserializer Chipset

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS (MAX9225)

(VDD= +2.375V to +3.465V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VDD= +2.5V, TA= +25°C.) (Notes 1, 2)

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.

VDDto 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

SINGLE-ENDED INPUTS (PCLKIN, DIN_, PWRDN)

High-Level Input Voltage V

Low-Level Input Voltage V

LCDS OUTPUT (SDO+, SDO-)

Differential Output Current

Output Short-Circuit Current I

POWER SUPPLY

Supply Current I

Worst-Case Pattern Supply Current I

Power-Down Supply Current I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

IN

I

ODH

I

ODL

OS

DD

DDW

DDZ

IH

IL

VIN = 0V to V

-0.3V ≤ VIN < 0VInput Current I

VDD < VIN ≤ (VDD + 0.3V)

High level 575 643 880

Low level 200 229 300

Shorted to 0V or V

VDD = 2.5V

VDD = 2.5V,
Figure 1

All inputs = low 0.5 µA

DD

DD

PCLKIN = 10MHz,
100Mbps

PCLKIN = 20MHz,
200Mbps

PCLKIN = 10MHz,
100Mbps

PCLKIN = 20MHz,
200Mbps

1.19 V

-0.3 +0.3 V

-20 +20

-100 +100

4.7 8.2

6.2 8.2

4.7 10.6

6.2 10.6

+ 0.3 V

DD

880 µA

µA

µA

mA

mA

MAX9225/MAX9226

10-Bit, Low-Power, 10MHz-to-20MHz

Serializer and Deserializer Chipset

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (MAX9226)

(VDD= +2.375V to +3.465V, V

DDO

= +1.71V to +3.465V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VDD=

V

DDO

= +2.5V, TA= +25°C.) (Notes 1, 2)

SINGLE-ENDED OUTPUTS (PCLKOUT, DOUT_)

High-Level Output Voltage V

Low-Level Output Voltage V

Output Short-Circuit Current I

LCDS INPUT (SDI+, SDI-)

Differential Input-Current Threshold I

Common-Mode Input Current I

Differential Input Impedance Z

Common-Mode Input Impedance Z

Input Capacitance C

POWER SUPPLY

Supply Current I

Worst-Case Pattern
Supply Current

Power-Down Supply Current I

Supply Difference V

GROUND POTENTIAL

Ground Difference V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V

OH

OL

OS

ID

IC

TOT

I

TOTW

TOTZ

SD

GD

ID

IC

IN

= +2.375V to +3.465V, IOH = -1mA 0.8 x V

DDO

V

= +2.375V to +3.465V, IOL = 1mA 0.2 V

DDO

Output shorted
to ground

IIC = 0µA, VDD = 3.3V ±5% 69 90 114

IIC = 0µA, VDD = 2.8V ±5% 82 108 137

IIC = 0µA, VDD = 2.5V ±5% 95 125 161

IIC = ±300µA, VDD = 3.3V ±5% 67 91 117

IIC = ±300µA, VDD = 2.8V ±5% 86 108 141

IIC = ±300µA 90 167 375 Ω

SDI+ or SDI- to ground 2 pF

VDD = V
(Note 4)

CL = 5pF, VDD =
V

DDO

Figure 2 (Note 4)

(Note 4) 0.3 3.0 µA

MAX9225 VDD to MAX9226 V

MAX9225 to MAX9226 ground difference -0.2 +0.2 V

DDO

= 2.5V,

= 2.5V

DDO

V

= 2.375V -2

DDO

V

= 3.135V -9

DDO

V

= 3.465V -25

DDO

-300 ±400 +300 µA

PCLKOUT = 10MHz,
100Mbps

PCLKOUT = 20MHz,
200Mbps

PCLKOUT = 10MHz,
100Mbps

PCLKOUT = 20MHz,
200Mbps

DD

-5 +5 %

V

mA

400 µA

Ω

8.4 12

mA

9.1 12

9.7 12

mA

11.6 13

MAX9225/MAX9226

10-Bit, Low-Power, 10MHz-to-20MHz
Serializer and Deserializer Chipset

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (MAX9225)

(VDD= +2.375V to +3.465V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VDD= +2.5V, TA= +25°C.) (Note 3)

AC ELECTRICAL CHARACTERISTICS (MAX9226)

(VDD= V

DDO

= +2.375V to +3.465V, CL= 5pF, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VDD= V

DDO

=

+2.5V, T

A

= +25°C.) (Notes 3, 5)

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

= IDD+ I

DDO

.

Note 5: C

L

includes probe and test jig capacitance.

PCLKIN INPUT REQUIREMENTS (Figure 3)

Input Rise Time t

Input Fall Time t

PCLKIN Period t

High-Level Pulse Width t

Low-Level Pulse Width t

Setup Time t

Hold Time t

PCLKOUT Period t

High-Level Pulse Width t

Low-Level Pulse Width t

Data Valid Before PCLKOUT t

Data Valid After PCLKOUT t

SERIALIZER AND DESERIALIZER LINK

Power-Up Time

Power-Down Time t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

R

F

P

PWH

PWL

S

H

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Figure 4 50 100 ns

P

PWH

PWL

t

PU1

t

PU2

PWRDN

Figure 4 0.4 x t

Figure 4 0.4 x t

Figure 4 5 ns

VB

Figure 4 5 ns

VA

From V
are ramping up

From PWRDN low to high

From PWRDN high to low 2.8 10 µs

DD

= V

= 2.375V when supplies

DDO

50 100 ns

0.3 x t

P

0.3 x t

P

3ns

1ns

P

P

2ns

2ns

0.7 x t

0.7 x t

0.6 x t

0.6 x t

11,264 x

t

P

4096 x

t

ns

P

ns

P

ns

P

ns

P

ns

P

MAX9225/MAX9226

10-Bit, Low-Power, 10MHz-to-20MHz

Serializer and Deserializer Chipset

_______________________________________________________________________________________ 5

Test Circuits/Timing Diagrams

Figure 3. Serializer Input Timing

Figure 1. Serializer Worst-Case Switching Pattern

Figure 2. Deserializer Worst-Case Switching Pattern

Figure 4. Deserializer Output Timing

ODD DIN_

EVEN DIN_

PCLKIN

t

PWL

V

PCLKIN

DIN_

PWRDN

VIH IS THE MINIMUM HIGH-LEVEL INPUT, AND VIL IS THE MAXIMUM LOW-LEVEL INPUT (SEE THE

IH

V

IL

t

F

t

S

V

IH

V

IL

ODD DOUT_

EVEN DOUT_

PCLKOUT

t

P

t

PWH

V

IH

V

IL

t

R

DC ELECTRICAL CHARACTERISTICS

t

H

TABLE)

V

IH

V

IH

V

IL

V

OH

PCLKOUT

DOUT_

V

IS THE MINIMUM HIGH-LEVEL OUTPUT, AND VOL IS THE MAXIMUM LOW-LEVEL OUTPUT (SEE THE

OH

t

P

t

t

PWH

VA

V

OH

V

OH

V

OL

TABLE)

t

PWL

V

OH

V

OL

t

VB

V

OH

V

OL

V

OL

DC ELECTRICAL CHARACTERISTICS