19-3797; Rev 2; 1/07
High-/Full-Speed USB 2.0 Switches
General Description
The MAX4906/MAX4906F/MAX4907/MAX4907F analog
switches combine the low on-capacitance (C
ON
) and
low on-resistance (R
ON
) necessary for high-perfor-
mance 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/dou-
ble-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 V
IH
, 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 avail-
able in space-saving, 2mm x 2mm µDFN packages and
operate over a -40°C to +85°C temperature range.
Features
♦
Fully Specified for a Single +3.0V to +3.6V
Power-Supply Voltage
♦
Low 4Ω (typ), 7Ω (max) On-Resistance (R
ON
)
♦
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
Ordering Information
PART
MAX4906ELB
MAX4906FELB
MAX4907ELA
MAX4907FELA
PIN-PACKAGE
10 µDFN
10 µDFN
8 µDFN
8 µDFN
PKG CODE
L1022-1
L1022-1
L822-1
L822-1
Applications
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
Note:
All devices operate over the -40°C to +85°C operating
temperature range.
Selector Guide appears at end of data sheet.
Typical Operating Characteristics
EYE DIAGRAM
V
NO1OUT
V+ =3.3V
I
BIAS
= 9mA
f = 240MHz
USB 2.0
HIGH SPEED
TRANSMIT
TEMPLATE
Pin Configurations
TOP VIEW
IN
SHDN/EN
GND
1
2
3
4
5
10
9
V+
NC1
NC2
NO1
NO2
100mV/div
COM1
COM2
MAX4906
MAX4906F
8
7
6
μDFN
V
NO2OUT
500ps/div
Pin Configurations continued at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
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.
High-/Full-Speed USB 2.0 Switches
MAX4906/MAX4606F/MAX4907/MAX4907F
ABSOLUTE MAXIMUM RATINGS
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
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.
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.
ELECTRICAL CHARACTERISTICS
(V+ = +3V to +3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V+= 3.3V, T
A
= +25°C.) (Note 2)
PARAMETER
ANALOG SWITCH
Analog Signal Range
Fault-Protection Trip Threshold
On-Resistance
V
COM
_,V
NO_
,
SHDN or SHDN/EN = 0 (Note 3)
V
NC_
V
FP
R
ON
I
COM_
= -40mA,
0V
≤
V
COM_
≤
V+,
SHDN or SHDN/EN = 0
I
COM_
= -40mA,
0V
≤
V
COM_
≤
1.5V,
SHDN = V+
(MAX4907/MAX4907F)
V+ = 3.0V,
I
COM_
= -40mA,
V
COM_
= 1.5V (Note 4)
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
1.0
-1
-1
+1
+1
0.7
4
0
3.6
4
V+
4.0
7
8
10
Ω
13
1.2
Ω
1.5
Ω
µA
µA
Ω
V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
On-Resistance During Shutdown
R
ONSH
On-Resistance Match Between
Channels
On-Resistance Flatness
Off-Leakage Current
On-Leakage Current
SWITCH AC PERFORMANCE
On-Channel -3dB Bandwidth
ΔR
ON
R
FLAT (ON)
I
COM_(OFF)
I
COM_(ON)
V+ = 3.0V, I
COM_
= -40mA,
V
COM_
= 1.5V, 3.0V (Note 5)
V+ = 3.6V, V
COM_
= 0.3V, 3.3V;
V
NO_
or V
NC_
= 3.3V, 0.3V
V+ = 3.6V, V
COM
= 0.3V, 3.3V;
V
NO_
or V
NC_
= 0.3V, 3.3V, or floating
R
L
= R
S
= 50Ω, signal = 0dBm, Figure 1
f = 10MHz; V
NO_
, V
NC_
= 1V
P-P
;
R
L
= R
S
= 50Ω, Figure 1
BW
1000
-60
-32
-26
MHz
Off-Isolation
V
ISO
f = 250MHz; V
NO_
, V
NC_
= 1V
P-P
;
R
L
= R
S
= 50Ω, Figure 1
f = 500MHz; V
NO_
, V
NC_
= 1V
P-P
;
R
L
= R
S
= 50Ω, Figure 1
dB
2
_______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +3V to +3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V+ = 3.3V, T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
f = 10MHz; V
NO_
, V
NC_
= 1V
P-P
;
R
L
= R
S
= 50Ω, Figure 1
Crosstalk (Note 6)
V
CT
f = 250MHz; V
NO_
, V
NC_
= 1V
P-P
;
R
L
= R
S
= 50Ω, Figure 1
f = 500MHz; V
NO_
, V
NC_
= 1V
P-P
;
R
L
= R
S
= 50Ω, Figure 1
SWITCH DYNAMICS
NO_, NC_ Off-Capacitance
C
(OFF)
f = 1MHz, Figure 2 (Note 7)
MAX4906ELB,
MAX4906FELB
MAX4907ELA,
MAX4907FELA
MAX4906ELB,
MAX4906FELB
Switch On-Capacitance Matching
C
ONM
f = 1MHz (Note 7)
MAX4907ELA,
MAX4907FELA
V
NO
_, V
NC
_ = 1.5V; R
L
= 300Ω, C
L
= 35pF,
V
IH
= V+, V
IL
= 0V, SHDN or SHDN/EN = 0V,
Figure 3
V
NO
_, V
NC
_ = 1.5V; R
L
= 300Ω, C
L
= 35pF,
V
IH
= V+, V
IL
= 0V, SHDN or SHDN/EN = 0V,
Figure 3; T
A
= +25°C
R
L
= R
S
= 50Ω, Figure 4
V
COM_
= 0 to 5V step,
R
L
= R
S
= 50Ω, Figure 5
V
COM_
= 5V to 3V step,
R
L
= R
S
= 50Ω, Figure 5
Skew between switch 1 and switch 2, R
L
=
R
S
= 50Ω, Figure 4 (Note 7)
Skew between opposite transitions in same
switch, R
L
= R
S
= 50Ω, Figure 4 (Note 7)
50
50
0.25
3.0
2
100
100
0.3
2
6
4
0.4
pF
4
9
pF
7
pF
MIN
TYP
-59
-31
-25
dB
MAX
UNITS
MAX4906/MAX4606F/MAX4907/MAX4907F
Switch On-Capacitance
C
(ON)
f = 1MHz, Figure 2
(Note 7)
Turn-On Time
t
ON
60
ns
Turn-Off Time
Propagation Delay
Fault-Protection Response Time
Fault-Protection Recovery Time
Output Skew Between Switches
Output Skew Same Switch
t
OFF
t
PLH_
,t
PHL
t
FP
t
FPR
t
SK(o)
t
SK(p)
30
ns
ns
µs
µs
ps
ps
_______________________________________________________________________________________
3
High-/Full-Speed USB 2.0 Switches
MAX4906/MAX4606F/MAX4907/MAX4907F
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +3V to +3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V+ = 3.3V, T
A
= +25°C.) (Note 2)
PARAMETER
Total Harmonic Distortion Plus
Noise
Charge Injection
SWITCH LOGIC
Logic-Input-Voltage Low
Logic-Input-Voltage High
Input-Logic Hysteresis
Input Leakage Current
Operating Supply-Voltage Range
Quiescent Supply Current
Quiescent Supply Current During
Shutdown
V
IL
V
IH
V
HYST
I
IN
V+
I+
I+
V+ = 3.6V, V
IN
= 0 or V+, SHDN or
SHDN/EN = 0
V+ = 3.6V, V
IN
= 0 or V+, SHDN or
SHDN/EN = V+
V+ = 3.6V, V
IN
= 0 or V+
-1
3.0
120
1.1
100
+1
3.6
300
2
0.4
V
V
mV
µA
V
µA
µA
SYMBOL
THD+N
Q
CONDITIONS
V
COM_
= 2V
P-P
, R
L
= 600Ω, f = 20Hz to
20kHz
V
GEN
= 1.5V, R
GEN
= 0Ω, C
L
= 100pF,
Figure 6
MIN
TYP
0.03
5
MAX
UNITS
%
pC
Note 2:
All units are 100% production tested at T
A
= +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) –
R
ON(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
(T
A
= +25°C, unless otherwise noted.)
ON-RESISTANCE vs. V
COM
MAX4906 toc01
ON-RESISTANCE vs. V
COM
MAX4906 toc02
LEAKAGE CURRENT vs. TEMPERATURE
4500
4000
LEAKAGE CURRENT (pA)
3500
3000
2500
2000
1500
1000
500
COM OFF-LEAKAGE
COM ON-LEAKAGE
V+ = 3.6V
MAX4906 toc03
6
V+ = 3.3V
5
4
R
ON
(Ω)
3
2
1
0
0
0.9
1.8
V
COM
(V)
2.7
V+ = 3.0V
6
V+ = 3.3V
5
4
R
ON
(Ω)
3
2
1
0
T
A
= +40°C
T
A
= +25°C
T
A
= +85°C
5000
V+ = 3.6V
0
0
1.1
V
COM
(V)
2.2
3.3
-40
-15
10
35
60
85
TEMPERATURE (°C)
3.6
4
_______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
CHARGE INJECTION vs. V
COM
MAX4906 toc04
MAX4906/MAX4606F/MAX4907/MAX4907F
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX4906 toc05
QUIESCENT SUPPLY CURRENT
vs. LOGIC LEVEL
V+ = 3.3V
140
MAX4906 toc06
10
C
L
= 100pF
V+ = 3.3V
CHARGE INJECTION (pC)
8
160
QUIESCENT SUPPLY CURRENT (μA)
140
120
100
80
60
40
20
V+ = 3.0V
V+ = 3.6V
150
QUIESCENT SUPPLY CURRENT (μA)
6
130
4
120
2
110
0
0
1.1
VCOM (V)
2.2
3.3
0
-40
-15
10
35
60
85
TEMPERATURE (°C)
100
0
1.1
2.2
3.3
LOGIC LEVEL (V)
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
MAX4906 toc07
TURN-ON/OFF TIME
vs. SUPPLY VOLTAGE
MAX4906 toc08
TURN-ON/OFF TIME
vs. TEMPERATURE
V+ = 3.3V
40
t
ON
t
ON
/t
OFF
(ns)
30
MAX4906 toc09
1
V
IH
50
50
0.8
LOGIC THRESHOLD (V)
40
t
ON
t
ON
/t
OFF
(ns)
0.6
V
IL
30
0.4
20
t
OFF
20
t
OFF
0.2
10
10
O
3.0
3.2
3.4
3.6
SUPPLY VOLTAGE (V)
O
3.0
3.2
3.4
3.6
SUPPLY VOLTAGE (V)
0
-40
-15
10
35
60
85
TEMPERATURE (°C)
RISE/FALL-TIME PROPAGATION DELAY
vs. SUPPLY VOLTAGE
MAX4906 toc10
RISE/FALL-TIME PROPAGATION DELAY
vs. TEMPERATURE
OUTPUT RISE/FALL -TIME DELAY (ps)
V+ = 3V
240
T
PLH
230
MAX4906 toc11
SAME SWITCH OUTPUT SKEW
vs. SUPPLY VOLTAGE
XMAX4906 toc12
250
OUTPUT RISE/FALL -TIME DELAY (ps)
250
10
240
T
PLH
230
5
OUTPUT SKEW (ps)
0
220
T
PHL
210
220
T
PHL
210
-5
200
3
..0
3.2
3.4
3.6
SUPPLY VOLTAGE (V)
200
-40
-15
10
35
60
85
TEMPERATURE (°C)
-10
3.0
3.2
3.4
3.6
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5
stm32/stm8
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
