MAX9238_12,MAX9238_12 pdf中文资料,MAX9238_12引脚图,MAX9238

MAX9234/MAX9236/

MAX9238

Hot-Swappable, 21-Bit, DC-Balanced LVDS

Deserializers

General Description

The MAX9234/MAX9236/MAX9238 deserialize three

LVDS serial-data inputs into 21 single-ended

LVCMOS/LVTTL outputs. A parallel-rate LVDS clock

received with the LVDS data streams provides timing for

deserialization. The outputs have a separate supply,

allowing 1.8V to 5V output logic levels. All these devices

are hot-swappable and allow “on-the-fly” frequency

programming.

The MAX9234/MAX9236/MAX9238 feature DC balance,

which allows isolation between a serializer and deseri-

alizer using AC-coupling. Each deserializer decodes

data transmitted by one of the MAX9209/MAX9211/

MAX9213/MAX9215 serializers.

The MAX9234 has a rising-edge output strobe. The

MAX9236/MAX9238 have a falling-edge output strobe.

The MAX9234/MAX9236/MAX9238 operate in DC-

balanced mode only.

The MAX9234/MAX9236 operate with a parallel input

clock of 8MHz to 34MHz, while the MAX9238 operates

from 16MHz to 66MHz. The transition time of the single-

ended outputs is increased on the low-frequency version

parts (MAX9234/MAX9236) for reduced EMI. The LVDS

inputs meet ISO 10605 ESD specification, ±25kV for Air-

Gap Discharge and ±8kV Contact Discharge.

The MAX9234/MAX9236/MAX9238 are available in 48-pin

TSSOP packages and operate over the -40°C to +85°C

temperature range.

Features

o

DC Balance Allows AC-Coupling for Wider Input

Common-Mode Voltage Range

o

On-the-Fly Frequency Programming

o

Operating Frequency Range

8MHz to 34MHz (MAX9234/MAX9236)

16MHz to 66MHz (MAX9238)

o

Falling-Edge Output Strobe (MAX9236/MAX9238)

o

Slower Output Transitions for Reduced EMI

(MAX9234/MAX9236)

o

High-Impedance Outputs when

PWRDWN

Is Low

Allow Output Busing

o

5V-Tolerant

PWRDWN

Input

o

PLL Requires No External Components

o

Up to 1.386Gbps Throughput

o

Separate Output Supply Pins Allow Interface to

1.8V, 2.5V, 3.3V, and 5V Logic

o

LVDS Inputs Meet ISO 10605 ESD Requirements

o

LVDS Inputs Conform to ANSI TIA/EIA-644 LVDS

Standard

o

Low-Profile, 48-Lead TSSOP Package

o

+3.3V Main Power Supply

o

-40°C to +85°C Operating Temperature Range

Applications

Automotive Navigation Systems

Automotive DVD Entertainment Systems

Digital Copiers

Laser Printers

MAX9234EUM+

MAX9234EUM/V+

MAX9236EUM+

MAX9238EUM+

-40°C to +85°C

PART

Ordering Information

TEMP RANGE

PIN-

PACKAGE

48 TSSOP

+Denotes

a lead(Pb)-free/RoHS-compliant package.

/V Denotes an automotive qualified part.

Note:

Devices are also available in a tape-and-reel packaging.

Specify tape and reel by adding “T” to the part number when

ordering.

Functional Diagram and Pin Configuration appear at end of

data sheet.

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

19-3641; Rev 2; 9/12

MAX9234/MAX9236/MAX9238

Hot-Swappable, 21-Bit, DC-Balanced LVDS

Deserializers

ABSOLUTE MAXIMUM RATINGS

V

CC

to GND ...........................................................-0.5V to +4.0V

V

CCO

to GND.........................................................-0.5V to +6.0V

RxIN_, RxCLK IN_ to GND ....................................-0.5V to +4.0V

PWRDWN

to GND....................................................-0.5V to 6.0V

RxOUT_, RxCLK OUT to GND ................-0.5V to (VCCO + 0.5V)

Continuous Power Dissipation (TA = +70°C)

48-Pin TSSOP (derate 16mW/°C above +70°C) ....... 1282mW

Storage Temperature Range .............................-65°C to +150°C

Junction Temperature ......................................................+150°C

ESD Protection

Human Body Model (RD = 1.5kΩ, CS = 100pF)

All Pins to GND ..................................………………….±5kV

IEC 61000-4-2 (RD = 330Ω, CS = 150pF)

Contact Discharge (RxIN_, RxCLK IN_) to GND .........±8kV

Air-Gap Discharge (RxIN_, RxCLK IN_) to GND .......±15kV

ISO 10605 (RD = 2kΩ, CS = 330pF)

Contact Discharge (RxIN_, RxCLK IN_) to GND ........±8kV

Air Discharge (RxIN_, RxCLK IN_) to GND ...............±25kV

Lead Temperature (soldering, 10s) .................................+300°C

Soldering Temperature (reflow) .......................................+260°C

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

CC

= +3.0V to +3.6V, V

CCO

= +3.0V to +5.5V,

PWRDWN

= high, differential input voltage

⏐V

ID

⏐

= 0.05V to 1.2V, input common-

mode voltage V

CM

=

⏐V

ID

/2⏐ to 2.4V -

⏐V

ID

/2⏐, T

A

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

CC

= V

CCO

=

+3.3V,

⏐V

ID

⏐

= 0.2V, V

CM

= 1.25V, T

A

= +25°C.) (Notes 1, 2)

PARAMETER

High-Level Input Voltage

Low-Level Input Voltage

Input Current

Input Clamp Voltage

SYMBOL

V

IH

V

IL

I

IN

V

CL

V

IN

= high or low

I

CL

= -18mA

V

CCO

-

0.1

RxCLK OUT

High-Level Output Voltage

V

OH

I

OH

= -2mA

MAX9238

I

OL

= 100µA

Low-Level Output Voltage

V

OL

I

OL

= 2mA

MAX9234/

MAX9236

MAX9238

High-Impedance Output Current

I

OZ

PWRDWN

= low,

V

OUT_

= -0.3V to V

CCO

+ 0.3V

MAX9234/

V

CCO

= 3.0V to MAX9236

3.6V, V

OUT

= 0V

MAX9238

V

CCO

= 4.5V to

5.5V, V

OUT

= 0V

MAX9234/

MAX9236

MAX9238

RxCLK OUT

RxOUT_

RxCLK OUT

RxOUT_

-20

-10

-5

-10

-28

-14

-28

RxCLK OUT

RxOUT_

MAX9234/

MAX9236

RxOUT_

V

CCO

-

0.25

V

CCO

-

0.40

V

CCO

-

0.25

0.1

0.2

0.26

0.2

+20

-40

-20

-40

-75

-37

-75

Maxim Integrated

CONDITIONS

MIN

2.0

-0.3

-70

TYP

MAX

5.5

+0.8

+70

-1.5

UNITS

V

µA

V

SINGLE-ENDED INPUT (PWRDWN)

SINGLE-ENDED OUTPUTS (RxOUT_, RxCLK OUT)

I

OH

= -100µA

V

µA

Output Short-Circuit Current

(Note: Short one output at a

time.)

I

OS

mA

2

MAX9234/MAX9236/MAX9238

Hot-Swappable, 21-Bit, DC-Balanced LVDS

Deserializers

DC ELECTRICAL CHARACTERISTICS (continued)

(V

CC

= +3.0V to +3.6V, V

CCO

= +3.0V to +5.5V,

PWRDWN

= high, differential input voltage

⏐V

ID

⏐

= 0.05V to 1.2V, input common-

mode voltage V

CM

=

⏐V

ID

/2⏐ to 2.4V -

⏐V

ID

/2⏐, T

A

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

CC

= V

CCO

=

+3.3V,

⏐V

ID

⏐

= 0.2V, V

CM

= 1.25V, T

A

= +25°C.) (Notes 1, 2)

PARAMETER

LVDS INPUTS

Differential Input-High Threshold

Differential Input-Low Threshold

Input Current

Power-Off Input Current

Input Resistor 1

POWER SUPPLY

8MHz

C

L

= 8pF,

worst-case

pattern; V

CC

=

V

CCO

= 3.0V to

3.6V, Figure 2

PWRDWN

= low

MAX9234/

MAX9236

16MHz

34MHz

16MHz

MAX9238

34MHz

66MHz

Power-Down Supply Current

I

CCZ

42

57

98

63

106

177

50

µA

mA

V

TH

V

TL

I

IN+,

I

IN-

I

INO+,

I

INO-

R

IN1

PWRDWN

= high or low

V

CC

= V

CCO

= 0V or open,

PWRDWN

= 0V or open

PWRDWN

= high or low (Figure 1)

V

CC

= V

CCO

= 0V or open (Figure 1)

-50

-25

-40

42

+25

+40

78

50

mV

µA

kΩ

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Worst-Case Supply Current

I

CCW

Maxim Integrated

3

MAX9234/MAX9236/MAX9238

Hot-Swappable, 21-Bit, DC-Balanced LVDS

Deserializers

AC ELECTRICAL CHARACTERISTICS

(V

CC

= V

CCO

= +3.0V to +3.6V, 100mV

P-P

at 200kHz supply noise, C

L

= 8pF,

PWRDWN

= high, 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⏐, T

A

= -40°C to +85°C, unless otherwise noted. Typical

values are at V

CC

= V

CCO

= +3.3V,

⏐V

ID

⏐

= 0.2V, V

CM

= 1.25V, T

A

= +25°C.) (Notes 3, 4, 5)

PARAMETER

Output Rise Time

SYMBOL

CLHT

0.1V

CCO

to

0.9V

CCO

,

Figure 3

0.9V

CCO

to

0.1V

CCO

,

Figure 3

CONDITIONS

MAX9234/

MAX9236

MAX9238

MAX9234/

MAX9236

MAX9238

8MHz

RxIN Skew Margin

RSKM

Figure 4

(Note 6)

MAX9238

RxCLK OUT High Time

RxCLK OUT Low Time

RxOUT Setup to RxCLK OUT

RxOUT Hold from RxCLK OUT

RxCLK IN to RxCLK OUT Delay

Deserializer Phase-Locked Loop

Set

Deserializer Power-Down Delay

RCOH

RCOL

RSRC

RHRC

RCCD

RPLLS

RPDD

Figures 5a, 5b

Figures 6a, 6b

Figure 7

Figure 8

16MHz

34MHz

66MHz

RxOUT

RxCLK OUT

RxOUT

RxCLK OUT

MIN

3.52

2.2

1.95

1.3

6600

2560

900

330

0.35 x

RCOP

0.35 x

RCOP

0.30 x

RCOP

0.45 x

RCOP

4.9

6.17

8.1

32800

x RCIP

100

TYP

5.04

3.15

3.18

2.12

7044

3137

1327

685

ns

ps

MAX

6.24

3.9

4.35

2.9

ns

UNITS

Output Fall Time

CHLT

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

except V

TH

and V

TL

.

Note 2:

Maximum and minimum limits overtemperature are guaranteed by design and characterization. Devices are production

tested at T

A

= +25°C.

Note 3:

AC parameters are guaranteed by design and characterization, and are not production tested. Limits are set at ±6 sigma.

Note 4:

C

L

includes probe and test jig capacitance.

Note 5:

RCIP is the period of RxCLK IN. RCOP is the period of RxCLK OUT. RCIP = RCOP.

Note 6:

RSKM measured with

≤

150ps cycle-to-cycle jitter on RxCLK IN.

4

Maxim Integrated

MAX9234/MAX9236/MAX9238

Hot-Swappable, 21-Bit, DC-Balanced LVDS

Deserializers

Typical Operating Characteristics

(V

CC

= V

CCO

= +3.3V, C

L

= 8pF,

PWRDWN

= high, differential input voltage

⏐V

ID

⏐

= 0.2V, input common-mode voltage V

CM

= 1.2V,

T

A

= +25°C, unless otherwise noted.)

MAX9234/MAX9236

WORST-CASE PATTERN AND PRBS

SUPPLY CURRENT vs. FREQUENCY

MAX9234/6/8 toc01

MAX9238

WORST-CASE PATTERN AND PRBS

SUPPLY CURRENT vs. FREQUENCY

MAX9234/6/8 toc02

100

90

SUPPLY CURRENT (mA)

80

WORST CASE

70

60

2

7

- 1 PRBS

50

40

30

5

10

15

20

25

30

35

180

160

SUPPLY CURRENT (mA)

140

120

100

80

60

40

2

7

- 1 PRBS

WORST CASE

40

10

20

30

40

50

60

70

FREQUENCY (MHz)

MAX9234/MAX9236

RxOUT TRANSITION TIME

vs. OUTPUT SUPPLY VOLTAGE (V

CCO

)

MAX9234/6/8 toc03

MAX9238

RxOUT TRANSITION TIME

vs. OUTPUT SUPPLY VOLTAGE (V

CCO

)

MAX9234/6/8 toc04

7

6

CLHT

5

4

CHLT

3

2

1

2.5

3.0

3.5

4.0

4.5

5

OUTPUT TRANSITION TIME (ns)

4

CLHT

3

2

CHLT

1

0

5.0

2.5

3.0

3.5

4.0

4.5

5.0

OUTPUT SUPPLY VOLTAGE (V)

Maxim Integrated

5

MAX9238_12

MAX9238_12概述

文档预览

MAX9238_12相似产品对比

推荐资源