MAXIM MAX4906, MAX4606F, MAX4907, MAX4907F User Manual

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General Description

The MAX4906/MAX4906F/MAX4907/MAX4907F analog
switches combine the low on-capacitance (CON) and
low on-resistance (RON) necessary for high-perfor­mance switching applications. These devices are
designed for USB 2.0 high-speed applications at
480Mbps. These switches will also handle all the
requirements for USB low- and full-speed signaling.

The MAX4906/MAX4906F feature two single-pole/dou­ble-throw (SPDT) switches, and the MAX4907/
MAX4907F feature two single-pole/single-throw switches
(SPST). The MAX4907/MAX4907F have a low 7Ω (max)
on-resistance and 7pF (max) on-capacitance. These
devices are fully specified to operate from a single
+3.0V to +3.6V power supply and are protected against
a +5.5V short to COM1 and COM2. This feature makes
them fully compliant with the USB 2.0 specification of
+5.5V fault protection. These devices feature a low
threshold voltage and a +1.4V VIH, permitting them to
be used with low-voltage logic. The MAX4906/
MAX4906F/MAX4907/MAX4907F operate at 300µA
(max) quiescent current and feature a shutdown input
to reduce the quiescent current to less than 2µA (max).

The MAX4906/MAX4906F/MAX4907/MAX4907F are avail­able in space-saving, 2mm x 2mm µDFN packages and
operate over a -40°C to +85°C temperature range.

Applications

Features

♦ Fully Specified for a Single +3.0V to +3.6V

Power-Supply Voltage

♦ Low 4Ω (typ), 7Ω (max) On-Resistance (RON)
♦ MAX4907/MAX4907F Ultra-Low 4pF (typ),

7pF (max) On-Capacitance (C

ON

)

♦ -3dB Bandwidth: 1GHz (typ)
♦ Low Bit-to-Bit Skew ≤ 100ps
♦ Shutdown Input Reduces Power Consumption

to 2µA (max)

♦ 3.3V, 1.8V, and 1.4V Logic Compatible
♦ COM

_

Analog Inputs Fault Protected Against

Shorts to USB Supply Rail Up to +5.5V

♦ Space-Saving Packages

8-Pin and 10-Pin, 2mm x 2mm µDFN Packages

MAX4906/MAX4606F/MAX4907/MAX4907F

High-/Full-Speed USB 2.0 Switches

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3797; Rev 2; 1/07

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Note: All devices operate over the -40°C to +85°C operating

temperature range.

Selector Guide appears at end of data sheet.

PART PIN-PACKAGE PKG CODE

MAX4906ELB 10 µDFN L1022-1

MAX4906FELB 10 µDFN L1022-1

MAX4907ELA 8 µDFN L822-1

MAX4907FELA 8 µDFN L822-1

Cell Phones
PDAs
Digital Still Cameras
GPS
Notebook Computers
Relay Replacements

USB Switching
Ethernet Switching
Video Switching
Bus Switches
T3/E3 Switches for

Redundancy Protection

1

2

3

4

5

10

9

8

7

6

V+

NC1

NC2

NO1COM1

GND

SHDN/EN

IN

MAX4906

MAX4906F

μDFN

NO2COM2

TOP VIEW

Pin Configurations

EYE DIAGRAM

500ps/div

V+ =3.3V
I

BIAS = 9mA

f = 240MHz

USB 2.0

HIGH SPEED

TRANSMIT
TEMPLATE

V

NO1OUT

100mV/div

V

NO2OUT

Typical Operating Characteristics

Pin Configurations continued at end of data sheet.

High-/Full-Speed USB 2.0 Switches

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V+ = +3V to +3.6V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V+= 3.3V, TA= +25°C.) (Note 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.

Note 1: Signals on IN, SHDN or SHDN/EN exceeding V+ or GND are clamped by internal diodes. Limit forward-diode current to

maximum current rating.

Voltages Referenced to GND

V+ .............................................................................-0.3V to +4V

IN, SHDN, SHDN/EN (Note 1) ......................-0.3V to (V+ + 0.3V)

COM_, NO_, NC_ ..................................................-0.5V to +5.5V

Continuous Current (COM_ to NO_/NC_) ......................±120mA

Peak Current, (COM_ to NO_/NC_)

(pulsed at 1ms 10% duty cycle).................................±240mA

Continuous Power Dissipation (T

A

= +70°C)

8-Pin µDFN (derate 5.0mW/°C above +70°C) .............400mW

10-Pin µDFN (derate 5.3mW/°C above +70°C) ........423.7mW

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

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

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

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

MAX4906/MAX4606F/MAX4907/MAX4907F

PARAMETER

CONDITIONS

UNITS

ANALOG SWITCH

Analog Signal Range

V

NC _

SHDN or SHDN/EN = 0 (Note 3) 0 V+ V

Fault-Protection Trip Threshold V

FP

3.6 4.0 V

TA = +25°C 4 7

On-Resistance R

ON

I

COM_

= -40mA,

0V ≤ V

COM_

≤ V+,

8

Ω

TA = +25°C 4 10

On-Resistance During Shutdown

R

ONSH

I

C OM _

= - 40m A,

0V ≤ V

C OM _

≤ 1.5V ,

S H D N = V +

13

Ω

TA = +25°C 0.7 1.2

On-Resistance Match Between
Channels

ΔR

ON

V+ = 3.0V,
I

COM_

= -40mA,

1.5

Ω

On-Resistance Flatness

)

V+ = 3.0V, I

COM_

= -40mA,

V

COM_

= 1.5V, 3.0V (Note 5)

1.0 Ω

Off-Leakage Current

)

V+ = 3.6V, V

COM_

= 0.3V, 3.3V;

V

NO_

or V

NC_

= 3.3V, 0.3V

-1 +1 µA

On-Leakage Current

)

V+ = 3.6V, V

COM

= 0.3V, 3.3V;

V

NO_

or V

NC_

= 0.3V, 3.3V, or floating

-1 +1 µA

SWITCH AC PERFORMANCE

On-Channel -3dB Bandwidth BW RL = RS = 50Ω, signal = 0dBm, Figure 1

MHz

f = 10MHz; V

NO_

, V

NC_

= 1V

P-P

;

R

L

= RS = 50Ω, Figure 1

-60

f = 250MHz; V

NO_

, V

NC_

= 1V

P-P

;

R

L

= RS = 50Ω, Figure 1

-32

Off-Isolation V

ISO

f = 500MHz; V

NO_

, V

NC_

= 1V

P-P

;

R

L

= RS = 50Ω, Figure 1

-26

dB

SYMBOL

V

_,V

NO_

,

COM

MIN TYP MAX

R

FLAT (ON

I

COM_(OFF

I

COM_(ON

SHDN or SHDN/EN = 0

( M AX 4907/M AX 4907F)

V

= 1.5V (Note 4)

COM_

= T

T

A

T

A

T

A

to T

MIN

MAX

= T

to T

MIN

MAX

= T

to T

MIN

MAX

1000

MAX4906/MAX4606F/MAX4907/MAX4907F

High-/Full-Speed USB 2.0 Switches

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V+ = +3V to +3.6V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V+ = 3.3V, TA= +25°C.) (Note 2)

PARAMETER

CONDITIONS

UNITS

f = 10MHz; V

NO_

, V

NC_

= 1V

P-P

;

R

L

= RS = 50Ω, Figure 1

-59

f = 250MHz; V

NO_

, V

NC_

= 1V

P-P

;

R

L

= RS = 50Ω, Figure 1

-31

Crosstalk (Note 6) V

CT

f = 500MHz; V

NO_

, V

NC_

= 1V

P-P

;

R

L

= RS = 50Ω, Figure 1

-25

dB

SWITCH DYNAMICS

NO_, NC_ Off-Capacitance C

(OFF)

f = 1MHz, Figure 2 (Note 7) 2 4 pF

MAX4906ELB,
MAX4906FELB

69

Switch On-Capacitance C

(ON)

f = 1MHz, Figure 2
(Note 7)

MAX4907ELA,
MAX4907FELA

47

pF

MAX4906ELB,
MAX4906FELB

0.4

Switch On-Capacitance Matching

C

ONM

f = 1MHz (Note 7)

MAX4907ELA,
MAX4907FELA

0.3

pF

Turn-On Time t

ON

V

N O

_, V

N C

_ = 1.5V ; RL = 300Ω , C L = 35p F,

V

IH

= V + , V IL = 0V , S H D N or S H D N /EN = 0V ,

Fi g ur e 3

60 ns

Turn-Off Time t

OFF

VNO_, VNC_ = 1.5V; RL = 300Ω, CL = 35pF,

Figure 3; TA = +25°C

30 ns

Propagation Delay

RL = RS = 50Ω, Figure 4

ns

Fault-Protection Response Time t

FP

V

COM_

= 0 to 5V step,

R

L

= RS = 50Ω, Figure 5

3.0 µs

Fault-Protection Recovery Time t

FPR

V

COM_

= 5V to 3V step,

R

L

= RS = 50Ω, Figure 5

2µs

Output Skew Between Switches t

SK(o)

Skew between switch 1 and switch 2, RL =
R

S

= 50Ω, Figure 4 (Note 7)

50 100 ps

Output Skew Same Switch t

SK(p)

Skew between opposite transitions in same
switch, R

L

= RS = 50Ω, Figure 4 (Note 7)

50 100 ps

SYMBOL

MIN TYP MAX

VIH = V+, VIL = 0V, SHDN or SHDN/EN = 0V,

t

PLH_,tPHL

0.25

MAX4906/MAX4606F/MAX4907/MAX4907F

High-/Full-Speed USB 2.0 Switches

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V+ = +3V to +3.6V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V+ = 3.3V, TA= +25°C.) (Note 2)

PARAMETER

CONDITIONS

UNITS

Total Harmonic Distortion Plus
Noise

V

COM_

= 2V

P-P

, RL = 600Ω, f = 20Hz to

20kHz

%

Charge Injection Q

V

GEN

= 1.5V, R

GEN

= 0Ω, CL = 100pF,

Figure 6

5pC

SWITCH LOGIC

Logic-Input-Voltage Low V

IL

0.4 V

Logic-Input-Voltage High V

IH

1.1 V

Input-Logic Hysteresis V

HYST

mV

Input Leakage Current I

IN

V+ = 3.6V, VIN = 0 or V+ -1 +1 µA

Operating Supply-Voltage Range

V+ 3.0 3.6 V

Quiescent Supply Current I+

V+ = 3.6V, V

IN

= 0 or V+, SHDN or

SHDN/EN = 0

300 µA

Quiescent Supply Current During
Shutdown

I+

V+ = 3.6V, V

IN

= 0 or V+, SHDN or

SHDN/EN = V+

2µA

Note 2: All units are 100% production tested at TA= +25°C. Limits over the operating temperature range are guaranteed by design

and not production tested.

Note 3: The switch will turn off for voltages above (V

FP

); therefore, protecting downstream circuits in case of a fault condition

(MAX4906F/MAX4907F).

Note 4: ΔR

ON(MAX)

= | R

ON(CH1) – RON(CH2)

|

Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance, as measured over

specified analog signal ranges.

Note 6: Between any two switches.
Note 7: Switch off-capacitance, switch on-capacitance, output skew between switches, and output skew same-switch limits are not

production tested; design guaranteed by bench characterization.

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

0

1500

1000

500

2000

2500

3000

3500

4000

4500

5000

-40 10-15 35 60 85

LEAKAGE CURRENT vs. TEMPERATURE

MAX4906 toc03

TEMPERATURE (°C)

LEAKAGE CURRENT (pA)

COM ON-LEAKAGE

COM OFF-LEAKAGE

V+ = 3.6V

0

2

1

4

3

5

6

01.80.9 2.7 3.6

ON-RESISTANCE vs. V

COM

MAX4906 toc01

V

COM

(V)

R

ON

(Ω)

V+ = 3.3V

V+ = 3.0V

V+ = 3.6V

0

2

1

4

3

5

6

0 1.1 2.2 3.3

MAX4906 toc02

V

COM

(V)

ON-RESISTANCE vs. V

COM

R

ON

(Ω)

TA = +40°C

TA = +25°C

TA = +85°C

V+ = 3.3V

SYMBOL

MIN TYP MAX

THD+N

0.03

100

120

MAX4906/MAX4606F/MAX4907/MAX4907F

High-/Full-Speed USB 2.0 Switches

_______________________________________________________________________________________ 5

100

110

130

120

140

150

QUIESCENT SUPPLY CURRENT

vs. LOGIC LEVEL

MAX4906 toc06

LOGIC LEVEL (V)

QUIESCENT SUPPLY CURRENT (μA)

0 2.21.1 3.3

V+ = 3.3V

O

0.2

0.6

0.4

0.8

1

LOGIC THRESHOLD vs. SUPPLY VOLTAGE

MAX4906 toc07

SUPPLY VOLTAGE (V)

LOGIC THRESHOLD (V)

3.0 3.43.2 3.6

V

IH

V

IL

O

10

30

20

40

50

TURN-ON/OFF TIME

vs. SUPPLY VOLTAGE

MAX4906 toc08

SUPPLY VOLTAGE (V)

t

ON

/t

OFF

(ns)

3.0 3.43.2 3.6

t

ON

t

OFF

0

10

30

20

40

50

-40 10-15 35 60 85

TURN-ON/OFF TIME

vs. TEMPERATURE

MAX4906 toc09

TEMPERATURE (°C)

t

ON

/t

OFF

(ns)

t

ON

t

OFF

V+ = 3.3V

200

210

230

220

240

250

RISE/FALL-TIME PROPAGATION DELAY

vs. SUPPLY VOLTAGE

MAX4906 toc10

SUPPLY VOLTAGE (V)

OUTPUT RISE/FALL -TIME DELAY (ps)

33.43.2 3.6

..0

T

PLH

T

PHL

200

210

230

220

240

250

-40 10-15 35 60 85

RISE/FALL-TIME PROPAGATION DELAY

vs. TEMPERATURE

MAX4906 toc11

TEMPERATURE (°C)

OUTPUT RISE/FALL -TIME DELAY (ps)

V+ = 3V

T

PLH

T

PHL

0

10

5

-5

-10

3.0 3.43.2 3.6

SAME SWITCH OUTPUT SKEW

vs. SUPPLY VOLTAGE

XMAX4906 toc12

SUPPLY VOLTAGE (V)

OUTPUT SKEW (ps)

Typical Operating Characteristics (continued)

(TA = +25°C, unless otherwise noted.)

0

2

6

4

8

10

CHARGE INJECTION vs. V

COM

MAX4906 toc04

VCOM (V)

CHARGE INJECTION (pC)

02.21.1 3.3

CL = 100pF
V+ = 3.3V

0

20

40

60

80

100

120

140

160

-40 -15 10 35 60 85

QUIESCENT SUPPLY CURRENT

vs. TEMPERATURE

MAX4906 toc05

TEMPERATURE (°C)

QUIESCENT SUPPLY CURRENT (μA)

V+ = 3.6V

V+ = 3.0V