19-5252; Rev 1; 6/11

High-Bandwidth, ±15kV ESD Protection

LVDS Switch

General Description

The MAX14979E is optimized for high-speed differential

switching applications. The device is ideal for low-volt-

age differential signal (LVDS) and low-voltage positive

emitter-coupled logic (LVPECL) switching applications.

The MAX14979E provides enhanced electrostatic dis-

charge (ESD) protection up to

Q15kV

and excellent high-

frequency response, making this device especially use-

ful for interfaces that must go to an outside connection.

The MAX14979E provides extremely low capacitance

(C

ON

) as well as low resistance (R

ON

) for low-insertion

loss and bandwidth up to 650MHz (1.3Gbps). In addi-

tion to the four pairs of double-pole/double-throw (DPDT)

switches, the MAX14979E provides low-frequency (up

to 50MHz) and AUX switching that can be used for LED

lighting or other applications.

The MAX14979E is available in a space-saving 36-pin

TQFN package and operates over the standard -40NC to

+85NC temperature range.

3015

S

Single +3.0V to +3.6V Power-Supply Voltage

S

Low On-Resistance (R

ON

): 4I (typ), 6.5I (max)

S

Low On-Capacitance (C

ON

): 8pF (typ)

S

-23dB Return Loss (100MHz)

S

-3dB Bandwidth: 650MHz

S

Built-In AUX Switches for Switching Indicators

S

Low 450µA (max) Quiescent Current

S

Bidirectional 8 to 16 Multiplexer/Demultiplexer

S

Space-Saving, Lead-Free, 36-Pin, 6mm x 6mm

Features

S

±15kV ESD Protected per MIL-STD-883, Method

MAX14979E

TQFN Package

Eye Diagram

Applications

Notebook Computers

Switch LVDS to Graphics Panels

LVDS and LVPECL Switching

100mV/div

Ordering Information

PART

MAX14979EETX+

TEMP RANGE

-40NC to +85NC

PIN-PACKAGE

36 TQFN-EP*

f = 300MHz

500ps/div

+Denotes

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

*EP

= Exposed pad.

Typical Operating Circuit appears at end of data sheet.

_______________________________________________________________

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.

High-Bandwidth, ±15kV ESD Protection

LVDS Switch

MAX14979E

ABSOLUTE MAXIMUM RATINGS

(Voltages referenced to GND.)

V+ .........................................................................-0.3V to +4.0V

All Other Pins...............................................-0.3V to (V+ + 0.3V)

Continuous Current (COM_ _ to NC_ _/NO_ _) ............

Q120mA

Continuous Current (AUX0_ to AUX1_/AUX2_)...............

Q40mA

Peak Current (COM_ _ to NC_ _/NO_ _)

(pulsed at 1ms, 10% duty cycle) ...............................

Q240mA

Current into Any Other Pin ..............................................

Q20mA

Continuous Power Dissipation (T

A

= +70NC)

36-Pin TQFN (derate 35.7mW/NC above +70NC) .......2.85mW

Operating Temperature Range ........................ -40NC to +85NC

Junction Temperature .................................................. +150NC

Storage Temperature Range ......................... -65NC to +150NC

Lead Temperature (soldering 10s) ................................+300NC

Soldering Temperature (reflow) ......................................+260NC

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.

PACKAGE THERMAL CHARACTERISTICS (Note 1)

TQFN

Junction-to-Ambient Thermal Resistance (B

JA

) ............8NC/W

Junction-to-Case Thermal Resistance (B

JC

) .................1NC/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.

ELECTRICAL CHARACTERISTICS

(V+ = +3.0V to +3.6V, T

A

= T

J

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V+ = +3.3V, T

A

= +25NC.) (Note 2)

PARAMETER

POWER SUPPLIES

Operating Power-Supply Range

ANALOG SWITCH

On-Resistance

On-Resistance AUX Switches

On-Resistance Match

Between Channels

On-Resistance Flatness

Off-Leakage Current

On-Leakage Current

SWITCH AC PERFORMANCE

Insertion Loss

Return Loss

Crosstalk

SWITCH AC CHARACTERISTICS

-3dB Bandwidth

Off-Capacitance

On-Capacitance

2

BW

C

OFF

C

ON

R

S

= R

L

= 50I, unbalanced

f = 1MHz, COM_ _

650

3.5

8

MHz

pF

I

LOS

R

LOS

V

CT1

V

CT2

R

S

= R

L

= 50I, unbalanced, f = 1MHz,

(Note 3)

f = 100MHz

Any switch to any switch;

R

S

= R

L

= 50I,

unbalanced, Figure 1

f = 25MHz

f = 125MHz

0.6

-23

-50

-26

dB

R

ON

R

ONAUX

DR

ON

R

FLAT(ON)

I

LCOM_

_(OFF)

SYMBOL

V+

CONDITIONS

MIN

+3.0

TYP

MAX

+3.6

UNITS

V

V+ = 3V, I

COM_ _

= -40mA,

V

COM_ _

= 0V, 1.5V, 3V

T

A

= +25NC

T

MIN

to T

MAX

4

5.5

6.5

40

I

V+ = 3V, I

AUX0_

= -40mA, V

AUX0_

= 0V,

1.5V, 3V

V+ = 3V, I

COM_ _

= -40mA,

V

COM_ _

= 0V, 3V (Note 3)

V+ = 3V, I

COM_ _

= -40mA,

V

COM_ _

= 0V, 1.5V

V+ = 3.6V, V

COM_ _

= 0.3V, 3.3V;

V

NC_ _

or V

NO_ _

= 3.3V, 0.3V

V+ = 3.6V, V

COM_ _

= 0.3V, 3.3V; V

NC_ _

or V

NO_ _

= 3.3V, 0.3V or unconnected

-1

T

A

= +25NC

T

MIN

to T

MAX

0.01

0.5

1.5

2

+1

FA

I

LCOM_

_(ON)

High-Bandwidth, ±15kV ESD Protection

LVDS Switch

ELECTRICAL CHARACTERISTICS (continued)

(V+ = +3.0V to +3.6V, T

A

= T

J

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V+ = +3.3V, T

A

= +25NC.) (Note 2)

PARAMETER

Turn-On Time

Turn-Off Time

Propagation Delay

Output Skew Between Ports

SWITCH LOGIC

Input-Voltage Low

Input-Voltage High

Input-Logic Hysteresis

Input Leakage Current

Quiescent Supply Current

ESD PROTECTION

ESD Protection

All Other Pins

COM_ _, NC_ _, NO_ _

HBM (spec MIL-STD-883, Method 3015)

Q15

Q2

kV

V

IL

V

IH

V

HYST

I

SEL

I+

V+ = 3.0V

V+ = 3.6V

V+ = 3.3V

V+ = 3.6V, V

SEL

= 0V or V+

V+ = 3.6V, V

SEL

= 0V or V+

-5

280

2.0

100

+5

450

0.8

V

mV

FA

SYMBOL

t

ON

t

OFF

t

PLH

, t

PHL

t

SK(o)

CONDITIONS

V

COM_ _

= 1V, R

L

= 100I, Figure 2

V

COM_ _

= 1V, R

L

= 100I, Figure 2

R

S

= R

L

= 50I, unbalanced, Figure 3

Skew between any two ports, Figure 4

0.1

0.01

MIN

TYP

MAX

50

UNITS

ns

MAX14979E

Note 2:

Specifications at TA = -40NC are guaranteed by design.

Note 3:

Guaranteed by design.

MAX14979E

SINGLE-ENDED BANDWIDTH

NETWORK

ANALYZER

50Ω TRACE

COM0+

36

NC0+

31

50Ω TRACE

NETWORK

ANALYZER

SINGLE-ENDED CROSSTALK

NETWORK

ANALYZER

50Ω TRACE

COM1+

2

NC1+

26

R13

49.9Ω

NETWORK

ANALYZER

50Ω TRACE

COM1-

3

NC1-

25

R14

49.9Ω

SINGLE-ENDED OFF-ISOLATION

NETWORK

ANALYZER

50Ω TRACE

R15

49.9Ω

COM2+

7

NC2+

22

50Ω TRACE

NETWORK

ANALYZER

Figure 1. Single-Ended Bandwidth, Crosstalk, and Off-Isolation

3

High-Bandwidth, ±15kV ESD Protection

LVDS Switch

MAX14979E

SEL

50%

V

IL

NC_ _

50%

t

OFF

t

ON

NO_ _

50%

0V

NC_ _

NO_ _

V

H

2.0V

V

L

COM_ _

V

IH

3.0V

2.0V

1.0V

t

ON

t

PLH

t

PHL

t

OFF

PULSE SKEW = t

SK(o)

= |t

PHL

- t

PLH

|

0V

THE MAX14979E SWITCHES ARE FULLY BIDIRECTIONAL.

Figure 2. Turn-On and Turn-Off Times

Figure 3. Propagation Delay Times

3.0V

2.0V

COM_ _

1.0V

t

PLH

t

PHL

V

OH

NC_ _

NO_ _

t

PLH

t

PHL

V

OH

NC_ _

NO_ _

2.0V

V

OL

2.0V

V

OL

OUTPUT SKEW = tSK(o) = |tPHL - tPHL|

THE MAX14979E SWITCHES ARE FULLY BIDIRECTIONAL.

Figure 4. Output Skew

4

High-Bandwidth, ±15kV ESD Protection

LVDS Switch

Typical Operating Characteristics

(V+ = 3.3V, T

A

= +25NC, unless otherwise noted.)

ON-RESISTANCE vs. V

COM_ _

MAX14979E toc01

MAX14979E

AUX_ ON-RESISTANCE vs. V

AUX_

MAX14979E toc02

LEAKAGE CURRENT vs. TEMPERATURE

36

32

LEAKAGE CURRENT (pA)

28

24

20

16

12

8

4

0

I

L(OFF)

I

L(ON)

MAX14979E toc03

6

5

4

R

ON

(

Ω

)

3

2

1

0

0.5

1.0

1.5

V

COM_ _

(V)

2.0

2.5

T

A

= +85°C

T

A

= +25°C

T

A

= -40°C

24

22

20

18

16

14

12

10

8

6

4

2

0

T

A

= -40°C

T

A

= +25°C

T

A

= +85°C

40

R

ONAUX

(Ω)

3.0

0

0.5

1.0

1.5

V

AUX_

(V)

2.0

2.5

3.0

-40

-15

10

35

60

85

TEMPERATURE (°C)

QUIESCENT SUPPLY CURRENT

vs. TEMPERATURE

340

QUIESCENT SUPPLY CURRENT (µA)

320

300

280

260

240

220

200

-40

-15

10

35

60

85

TEMPERATURE (°C)

V+ = 3.6V

MAX14979E toc04

SINGLE-ENDED INSERTION LOSS

vs. FREQUENCY

-1

INSERTION LOSS (dB)

-2

-3

-4

-5

-6

-7

-8

1

10

100

1000

FREQUENCY (MHz)

MAX14979E toc05

0

5

参数名称	属性值
Manufacture	Maxim Integrated
产品种类 Product Category	Analog Switch ICs
RoHS	Yes
系列 Packaging	Reel
工厂包装数量 Factory Pack Quantity	2500

	MAX14979EETX+TGH7	MAX14979EETX+GH7
描述	analog switch ics esd protection lvds switch	analog switch ics high BW lvds switch
Manufacture	Maxim Integrated	Maxim Integrated
产品种类 Product Category	Analog Switch ICs	Analog Switch ICs
RoHS	Yes	Yes
工厂包装数量 Factory Pack Quantity	2500	50

MAX14979EETX+TGH7

MAX14979EETX+TGH7概述

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