MAX4907ETA+ [MAXIM]
SPST, 2 Func, 1 Channel, BICMOS, 3 X 3 MM, 0.8 MM HEIGHT, MO229, TDFN-10;
| 型号： | MAX4907ETA+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | SPST, 2 Func, 1 Channel, BICMOS, 3 X 3 MM, 0.8 MM HEIGHT, MO229, TDFN-10 开关 |
| 文件： | 总14页 (文件大小：221K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-3797; Rev 2; 1/07
High-/Full-Speed USB 2.0 Switches
General Description
Features
♦ Fully Specified for a Single +3.0V to +3.6V
The MAX4906/MAX4906F/MAX4907/MAX4907F analog
switches combine the low on-capacitance (C ) and
ON
Power-Supply Voltage
low on-resistance (R ) necessary for high-perfor-
ON
♦ Low 4Ω (typ), 7Ω (max) On-Resistance (R
♦ MAX4907/MAX4907F Ultra-Low 4pF (typ),
)
ON
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.
7pF (max) On-Capacitance (C
♦ -3dB Bandwidth: 1GHz (typ)
♦ Low Bit-to-Bit Skew ≤ 100ps
)
ON
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
♦ 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
threshold voltage and a +1.4V V , permitting them to
IH
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).
Ordering Information
PART
PIN-PACKAGE
10 µDFN
10 µDFN
8 µDFN
PKG CODE
L1022-1
L1022-1
L822-1
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.
MAX4906ELB
MAX4906FELB
MAX4907ELA
MAX4907FELA
Applications
8 µDFN
L822-1
Cell Phones
USB Switching
Note: All devices operate over the -40°C to +85°C operating
temperature range.
PDAs
Digital Still Cameras
GPS
Ethernet Switching
Video Switching
Bus Switches
Notebook Computers
Relay Replacements
T3/E3 Switches for
Redundancy Protection
Selector Guide appears at end of data sheet.
Typical Operating Characteristics
Pin Configurations
EYE DIAGRAM
TOP VIEW
VNO1OUT
V+ =3.3V
IBIAS = 9mA
f = 240MHz
IN
SHDN/EN
GND
1
2
3
4
5
10 V+
9
8
7
6
NC1
USB 2.0
HIGH SPEED
TRANSMIT
TEMPLATE
NC2
NO1
NO2
MAX4906
MAX4906F
100mV/div
COM1
COM2
μDFN
VNO2OUT
Pin Configurations continued at end of data sheet.
500ps/div
________________________________________________________________ Maxim Integrated Products
1
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
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND
Continuous Power Dissipation (T = +70°C)
A
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_)
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
(pulsed at 1ms 10% duty cycle)................................. 240mA
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 = T
A
to T
, unless otherwise noted. Typical values are at V+= 3.3V, T = +25°C.) (Note 2)
MAX A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ANALOG SWITCH
V
_,V
,
COM NO_
V
Analog Signal Range
SHDN or SHDN/EN = 0 (Note 3)
0
V+
V
V
NC_
Fault-Protection Trip Threshold
On-Resistance
V
3.6
4.0
7
FP
T
T
= +25°C
4
4
I
= -40mA,
A
COM_
0V ≤ V
SHDN or SHDN/EN = 0
≤ V+,
R
Ω
COM_
ON
= T
to T
8
A
MIN
MAX
I
= -40mA,
COM_
T
T
= +25°C
10
13
A
0V ≤ V
SHDN = V+
(MAX4907/MAX4907F)
≤ 1.5V,
COM_
On-Resistance During Shutdown
R
ONSH
Ω
= T
to T
A
MIN
MAX
V+ = 3.0V,
T
T
= +25°C
0.7
1.0
1.2
1.5
A
On-Resistance Match Between
Channels
ΔR
I
= -40mA,
Ω
ON
COM_
= T
to T
V
= 1.5V (Note 4)
A
MIN
MAX
COM_
V+ = 3.0V, I
= -40mA,
COM_
On-Resistance Flatness
Off-Leakage Current
On-Leakage Current
R
Ω
FLAT (ON)
V
= 1.5V, 3.0V (Note 5)
COM_
V+ = 3.6V, V
= 0.3V, 3.3V;
COM_
I
-1
-1
+1
+1
µA
µA
COM_(OFF)
V
or V
= 3.3V, 0.3V
NC_
NO_
V+ = 3.6V, V
= 0.3V, 3.3V;
COM
I
COM_(ON)
V
or V
= 0.3V, 3.3V, or floating
NC_
NO_
SWITCH AC PERFORMANCE
On-Channel -3dB Bandwidth
BW
R = R = 50Ω, signal = 0dBm, Figure 1
1000
-60
MHz
dB
L
S
f = 10MHz; V
, V
NO_ NC_
= 1V
;
P-P
R = R = 50Ω, Figure 1
L
S
f = 250MHz; V
, V
= 1V
;
;
NO_ NC_
P-P
P-P
Off-Isolation
V
-32
-26
ISO
R = R = 50Ω, Figure 1
L
S
f = 500MHz; V
, V
NO_ NC_
= 1V
R = R = 50Ω, Figure 1
L
S
2
_______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +3V to +3.6V, T = T
A
to T
, unless otherwise noted. Typical values are at V+ = 3.3V, T = +25°C.) (Note 2)
MAX A
MIN
PARAMETER
SYMBOL
CONDITIONS
, V = 1V
R = R = 50Ω, Figure 1
MIN
TYP
MAX
UNITS
f = 10MHz; V
;
P-P
NO_ NC_
-59
L
S
f = 250MHz; V
, V
= 1V
= 1V
;
;
NO_ NC_
P-P
P-P
Crosstalk (Note 6)
V
dB
-31
-25
CT
R = R = 50Ω, Figure 1
L
S
f = 500MHz; V
, V
NO_ NC_
R = R = 50Ω, Figure 1
L
S
SWITCH DYNAMICS
NO_, NC_ Off-Capacitance
C
f = 1MHz, Figure 2 (Note 7)
2
6
4
9
7
pF
pF
(OFF)
MAX4906ELB,
MAX4906FELB
f = 1MHz, Figure 2
(Note 7)
Switch On-Capacitance
C
(ON)
MAX4907ELA,
MAX4907FELA
4
MAX4906ELB,
MAX4906FELB
0.4
0.3
Switch On-Capacitance Matching
C
f = 1MHz (Note 7)
pF
ONM
MAX4907ELA,
MAX4907FELA
V
V
_, V _ = 1.5V; R = 300Ω, C = 35pF,
NC L L
NO
Turn-On Time
Turn-Off Time
t
= V+, V = 0V, SHDN or SHDN/EN = 0V,
60
30
ns
ns
ON
IH
IL
Figure 3
V
V
_, V _ = 1.5V; R = 300Ω, C = 35pF,
NC L L
NO
= V+, V = 0V, SHDN or SHDN/EN = 0V,
t
IH
IL
OFF
Figure 3; T = +25°C
A
Propagation Delay
t
,t
R = R = 50Ω, Figure 4
0.25
ns
µs
PLH_ PHL
L
S
V
= 0 to 5V step,
COM_
Fault-Protection Response Time
t
3.0
2
FP
R = R = 50Ω, Figure 5
L
S
V
= 5V to 3V step,
COM_
Fault-Protection Recovery Time
Output Skew Between Switches
Output Skew Same Switch
t
µs
ps
ps
FPR
R = R = 50Ω, Figure 5
L
S
Skew between switch 1 and switch 2, R =
R = 50Ω, Figure 4 (Note 7)
S
L
t
50
50
100
100
SK(o)
Skew between opposite transitions in same
t
SK(p)
switch, R = R = 50Ω, Figure 4 (Note 7)
L
S
_______________________________________________________________________________________
3
High-/Full-Speed USB 2.0 Switches
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +3V to +3.6V, T = T
A
to T
, unless otherwise noted. Typical values are at V+ = 3.3V, T = +25°C.) (Note 2)
MAX A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Total Harmonic Distortion Plus
Noise
V
= 2V , R = 600Ω, f = 20Hz to
COM_
P-P
L
THD+N
Q
0.03
%
20kHz
V
= 1.5V, R
= 0Ω, C = 100pF,
GEN L
GEN
Charge Injection
5
pC
Figure 6
SWITCH LOGIC
Logic-Input-Voltage Low
Logic-Input-Voltage High
Input-Logic Hysteresis
Input Leakage Current
V
0.4
V
V
IL
V
1.1
IH
V
100
120
mV
µA
V
HYST
I
V+ = 3.6V, V = 0 or V+
-1
+1
IN
IN
Operating Supply-Voltage Range
V+
3.0
3.6
V+ = 3.6V, V = 0 or V+, SHDN or
IN
SHDN/EN = 0
Quiescent Supply Current
I+
300
2
µA
µA
Quiescent Supply Current During
Shutdown
V+ = 3.6V, V = 0 or V+, SHDN or
IN
SHDN/EN = V+
I+
Note 2: All units are 100% production tested at T = +25°C. Limits over the operating temperature range are guaranteed by design
A
and not production tested.
Note 3: The switch will turn off for voltages above (V ); therefore, protecting downstream circuits in case of a fault condition
FP
(MAX4906F/MAX4907F).
Note 4: ΔR
= | R
R
|
ON(MAX)
ON(CH1) – 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 = +25°C, unless otherwise noted.)
A
ON-RESISTANCE vs. V
LEAKAGE CURRENT vs. TEMPERATURE
ON-RESISTANCE vs. V
COM
COM
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
6
5
4
3
2
1
0
6
5
4
3
2
1
0
V+ = 3.6V
V+ = 3.3V
= +85°C
V+ = 3.3V
V+ = 3.0V
T
A
COM ON-LEAKAGE
COM OFF-LEAKAGE
V+ = 3.6V
T
= +25°C
A
T
= +40°C
A
0
0
1.1
2.2
3.3
-40
-15
10
35
60
85
0
0.9
1.8
2.7
3.6
V
(V)
TEMPERATURE (°C)
V
(V)
COM
COM
4
_______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches
Typical Operating Characteristics (continued)
(T = +25°C, unless otherwise noted.)
A
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
QUIESCENT SUPPLY CURRENT
vs. LOGIC LEVEL
CHARGE INJECTION vs. V
COM
10
160
140
120
100
80
150
140
130
120
110
100
C = 100pF
L
V+ = 3.3V
V+ = 3.3V
V+ = 3.6V
8
6
4
2
0
V+ = 3.0V
60
40
20
0
0
1.1
2.2
3.3
-40
-15
10
35
60
85
0
1.1
2.2
3.3
VCOM (V)
TEMPERATURE (°C)
LOGIC LEVEL (V)
TURN-ON/OFF TIME
vs. SUPPLY VOLTAGE
TURN-ON/OFF TIME
vs. TEMPERATURE
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
50
40
30
20
10
O
50
40
30
20
10
0
1
V+ = 3.3V
V
IH
0.8
0.6
0.4
0.2
O
t
ON
t
ON
V
IL
t
OFF
t
OFF
3.0
3.2
3.4
3.6
3.0
3.2
3.4
3.6
-40
-15
10
35
60
85
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
RISE/FALL-TIME PROPAGATION DELAY
vs. SUPPLY VOLTAGE
SAME SWITCH OUTPUT SKEW
vs. SUPPLY VOLTAGE
RISE/FALL-TIME PROPAGATION DELAY
vs. TEMPERATURE
250
240
230
220
210
200
10
5
250
240
230
220
210
200
V+ = 3V
T
PLH
T
PLH
0
T
PHL
T
PHL
-5
-10
3
..0
3.2
3.4
3.6
3.0
3.2
3.4
3.6
-40
-15
10
35
60
85
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
_______________________________________________________________________________________
5
High-/Full-Speed USB 2.0 Switches
Typical Operating Characteristics (continued)
(T = +25°C, unless otherwise noted.)
A
OUTPUT SKEW BETWEEN SWITCHES
vs. SUPPLY VOLTAGE
FREQUENCY RESPONSE
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
10
5
ON-LOSS
CROSS-TALK
0
OFF-ISOLATION
100
-5
-10
1
10
1000
3.0
3.2
3.4
3.6
FREQUENCY (MHz)
SUPPLY VOLTAGE (V)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
1
V+ = 3.3V
R = 600Ω
L
0.1
0.01
10
100
1k
10k
100k
FREQUENCY (Hz)
6
_______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches
Pin Description
PIN
NAME
FUNCTION
MAX4906/ MAX4907/
MAX4906F MAX4907F
1
8
IN
Digital Control Input. IN controls switch 1 and switch 2.
Shutdown and Enable Input. Drive SHDN/EN high to consume minimum current and to put the
device in high-impedance mode. Drive the SHDN/EN low for normal operation.
2
—
SHDN/EN
GND
3
4
5
6
7
8
9
2
3
Ground
COM1 Analog Switch 1—Common Terminal
COM2 Analog Switch 2—Common Terminal
4
5
NO2
NO1
NC2
NC1
Analog Switch 2—Normally Open Terminal
Analog Switch 1—Normally Open Terminal
Analog Switch 2—Normally Closed Terminal
Analog Switch 1—Normally Closed Terminal
6
—
—
Positive-Supply Voltage Input. Connect V+ to a 3.0V to 3.6V supply voltage. Bypass V+ to
GND with a 0.1µF capacitor.
10
—
7
1
V+
Shutdown Input. Drive SHDN high to put the device into shutdown mode. For normal
operation, drive SHDN low.
SHDN
Test Circuits/Timing Diagrams
10nF
+3.3V
V+
V
V
OUT
OFF-ISOLATION = 20log
ON-LOSS = 20log
V
IN
NETWORK
ANALYZER
50Ω
50Ω
OUT
V
V
0V OR V+
IN
IN_
V
IN
COM1
V
OUT
MAX4906/MAX4906F
MAX4907/MAX4907F
CROSSTALK = 20log
NC1
V
IN
MEAS
REF
OUT
NO1*
50Ω
50Ω
50Ω
GND
*FOR CROSSTALK THIS PIN IS NO2.
NC2 AND COM2 ARE OPEN.
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" NO_ OR NC_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND "ON" NO_ OR NC_ TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
Figure 1. On-Loss, Off-Isolation, and Crosstalk
_______________________________________________________________________________________
7
High-/Full-Speed USB 2.0 Switches
Test Circuits/Timing Diagrams (continued)
V+
10nF
V+
COM_
MAX4906/MAX4906F
MAX4907/MAX4907F
IN
V
IL
OR V
IH
CAPACITANCE
METER
NC_ or
NO_
f = 1MHz
GND
Figure 2. Channel Off/On-Capacitance
MAX4906/MAX4906F
MAX4907/MAX4907F
V+
t < 5ns
t < 5ns
f
r
V
IH
LOGIC
INPUT
50%
V+
COM_
V
IL
NO_
V
N_
V
OUT
OR NC_
t
OFF
R
L
C
L
IN
V
OUT
0.9 x V
0.9 x V
OUT
0UT
GND
LOGIC
INPUT
SWITCH
OUTPUT
0V
t
ON
C INCLUDES FIXTURE AND STRAY CAPACITANCE.
L
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
R
L
V
OUT
= V
N_
(
)
ON
R + R
L
Figure 3. Switching Time
8
_______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches
Test Circuits/Timing Diagrams (continued)
MAX4906/MAX4906F
MAX4907/MAX4907F
NC1 OR
NO1
R
R
S
COM1
IN+
IN-
OUT+
OUT-
RISE-TIME PROPAGATION DELAY = t
OR t
PHLY
PHLX
FALL-TIME PROPAGATION DELAY = t
OR t
PHLY
PHLX
|
|
R
R
L
t
t
= |t
= |t
- t
| OR |t
| OR |t
- t
SK(O)
SK(P)
PHLX PHLY
PHLX PHLY
- t
- t
PHLX PHLX
PHLY PHLY
NC2 OR
NO2
S
COM2
L
IN IN
V
IL
TO V
IH
t
INFALL
t
INRISE
10%
V+
90%
90%
V
IN+
50%
50%
50%
10%
0V
V+
V
50%
IN-
0V
V+
t
t
OUTRISE
OUTFALL
10%
t
t
PLHX
PHLX
90%
90%
V
OUT+
50%
50%
10%
0V
V+
50%
50%
V
OUT-
0V
t
t
PHLY
PLHY
Figure 4. Output Signal Skew, Rise/Fall Time, Propagation Delay
_______________________________________________________________________________________
9
High-/Full-Speed USB 2.0 Switches
Test Circuits/Timing Diagrams (continued)
5V
3V
2.5V
VCOM_
0V
t
t
FPR
PF
V
PF
3V
0V
2.5V
VNO_
VNC_
1.5V
Figure 5. MAX4906F/MAX4907F Fault-Protection Response/Recovery Time
V+
MAX4906/MAX4906F
ΔV
OUT
MAX4907/MAX4907F
V+
V
OUT
R
GEN
COM_
NC_
V
OUT
IN
OR NO_
OFF
OFF
OFF
OFF
C
L
ON
V
GEN
GND
IN
ON
V
IL
TO V
IH
IN
Q = (ΔV )(C )
OUT
L
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 6. Charge Injection
The MAX4906/MAX4906F/MAX4907/MAX4907F are fully
specified to operate from a single +3.0V to +3.6V supply
and are available with +5.5V fault protection (MAX4906F/
MAX4907F). When operating from a +3.0V to +3.6V sup-
ply, the low threshold of these devices permits them to
be used with logic levels as low as 1.4V.The
MAX4906/MAX4906F/MAX4907/MAX4907F are based
on a charge-pump-assisted n-channel architecture and
thus operate at 300µA (max) quiescent current. These
devices all feature a shutdown input to reduce the quies-
cent current to less than 2µA (max).
Detailed Description
The MAX4906/MAX4906F/MAX4907/MAX4907F analog
switches are targeted for USB 2.0 high-speed
(480Mbps) switching applications. These devices still
meet USB low- and full-speed requirements and are
suitable for 10/100 Ethernet switching. The MAX4906/
MAX4906F feature two SPDT switches, while the
MAX4907/MAX4907F feature two SPST switches. The
MAX4907/MAX4907F switch configurations have a low
7Ω (max) on-resistance and 7pF (max) on-capacitance.
10 ______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches
Functional Diagram/Truth Table
V+
V+
SHDN
SHDN/EN
MAX4907/MAX4907F
MAX4906/MAX4906F
IN
IN
NO1
COM1
COM2
NO1
COM1
COM2
NC1
NO2
NO2
NC2
GND
GND
MAX4907/MAX4907F
MAX4906/MAX4906F
NO1
NO2
NC1
NC2
COM1- NO1
COM2- NO1
SHDN/EN
IN
SHDN
IN
0
0
1
x
OFF
ON
OFF
OFF
0
0
1
1
0
1
0
1
OFF
ON
ON
0
1
OFF
OFF
ON
Digital Control Input
Shutdown Mode
The MAX4906/MAX4906F feature a shutdown mode
that reduces the quiescent current supply to less than
2µA. Drive SHDN/EN high to place the devices in high-
impedance mode. When SHDN/EN is driven low, the
devices are normal in operation.
The MAX4906/MAX4906F/MAX4907/MAX4907F provide
a single-digit control logic input, IN. IN controls the
position of the switches as shown in the Functional
Diagram/Truth Table. Driving IN rail-to-rail minimizes
power consumption. With a +3.0V to +3.6V supply volt-
age range, these devices are +1.4V logic compatible.
The MAX4907/MAX4907F feature a SHDN input that
reduces the quiescent current supply to less than 2µA.
Drive SHDN high to place the devices in low current
mode. The devices can be used in low current mode, but
Analog Signal Levels
The on-resistance of the MAX4906/MAX4906F/
MAX4907/MAX4907F is very low and stable as the ana-
log input signals are swept from ground to V+ (see the
Typical Operating Characteristics). These switches are
bidirectional, allowing NO_, NC_, and COM_ to be con-
figured as either inputs or outputs.
with a reduced analog voltage range of 0 < V
<
ANALOG
1.5V and reduced performance. When SHDN is driven
low, the MAX4907/MAX4907F are in normal operation.
Applications Information
Overvoltage Fault Protection
The MAX4906F and MAX4907F feature +5.5V fault pro-
tection to COM1 and COM2. Fault protection prevents
these switches from being damaged due to shorts to
the USB bus voltage rail.
USB Switching
The MAX4906/MAX4906F/MAX4907/MAX4907F analog
switches are fully compliant with the USB 2.0 specifica-
tion. The low on-resistance and low on-capacitance of
these switches make them ideal for high-performance
switching applications. The MAX4906/MAX4906F are
______________________________________________________________________________________ 11
High-/Full-Speed USB 2.0 Switches
ASIC I
SHARED
DATA PINS
D+
MAX4907/
MAX4907F
V
BUS
USB
TRANSCEIVER
MAX4906/
MAX4906F
D-
NC1
NO1
COM1
NO1
NO2
DATA
COM1
D+
USB
TRANSCEIVER
SPI/GPIO
DEVICE
COM2
CLOCK
NC2
NO2
D-
COM2
TRI-STATE
ENABLE
ASIC II
EN
D+
D-
USB
TRANSCEIVER
Figure 9. MAX4907/MAX4907F USB/SPI/GPIO Switch
GND
Ethernet Switching
USB
CONNECTOR
The wide bandwidth of the MAX4906/MAX4906F/
MAX4907/MAX4907F meets the needs of 10/100 Ethernet
switching. These devices switch the signals from two
interface transformers and connect the signals to a single
10/100 Base-T Ethernet PHY, simplifying docking station
design and reducing manufacturing costs.
Figure 7. MAX4906/MAX4906F USB Data Routing
MAX4906/
MAX4906F
NC1
Power-Supply Sequencing
Caution: Do not exceed the absolute maximum rat-
ings because stresses beyond the listed ratings
may cause permanent damage to the device.
USB +
0
COM1
NO1
NC2
NO2
Proper power-supply sequencing is recommended for
all CMOS devices. Always apply V+ before applying
analog signals, especially if the analog signal is not
current limited.
USB +
1
USB
TRANSCEIVER
USB -
0
COM2
Layout
High-speed switches require proper layout and design
procedures for optimum performance. Keep design-
controlled-impedance PC board traces as short as pos-
sible. Ensure that bypass capacitors are as close to the
device as possible. Use large ground planes where
possible.
USB -
1
Figure 8. MAX4906/MAX4906F Switching Between Multiple
USB Hosts
ideal for routing USB data lines (see Figure 7) and for
applications that require switching between multiple
USB hosts (see Figure 8). The MAX4907/MAX4907F
can be used in applications that require different data
types to share the same pins (see Figure 9); however,
the shared device must be capable of going into the tri-
state mode. The MAX4906F/MAX4907F also feature
+5.5V fault protection to guard systems against shorts
to the USB bus voltage. The fault-protected versions
are recommended for all USB applications.
12 ______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches
Pin Configurations (continued)
Selector Guide
FAULT
PROTECTION MARK
TOP
PART
CONFIGURATION
TOP VIEW
MAX4906ELB
MAX4906FELB
MAX4907ELA
MAX4907FELA
Dual SPDT
Dual SPDT
Dual SPST
Dual SPST
NO
YES
NO
AAB
AAA
AAE
AAD
SHDN
1
2
3
4
8
7
6
5
IN
GND
COM1
COM2
V+
MAX4907
MAX4907F
NO1
NO2
YES
μDFN
Chip Information
PROCESS: BiCMOS
Revision History
Pages changed at Rev 2: 1, 2, 3, 7, 11, 14
______________________________________________________________________________________ 13
High-/Full-Speed USB 2.0 Switches
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
A
b
D
e
N
XXXX
XXXX
XXXX
SOLDER
MASK
COVERAGE
E
PIN 1
0.10x45∞
L
L1
1
SAMPLE
MARKING
PIN 1
INDEX AREA
A
A
7
(N/2 -1) x e)
C
L
C
L
b
L
L
A
e
e
A2
EVEN TERMINAL
ODD TERMINAL
A1
PACKAGE OUTLINE,
6, 8, 10L uDFN, 2x2x0.80 mm
1
-DRAWING NOT TO SCALE-
21-0164
A
2
COMMON DIMENSIONS
SYMBOL
MIN.
0.70
0.15
0.020
1.95
1.95
0.30
NOM.
MAX.
A
0.75
0.20
0.025
2.00
2.00
0.40
0.80
0.25
0.035
2.05
2.05
0.50
A1
A2
D
-
E
L
L1
0.10 REF.
PACKAGE VARIATIONS
PKG. CODE
L622-1
N
6
e
b
(N/2 -1) x e
0.65 BSC
0.50 BSC
0.40 BSC
0.30±0.05 1.30 REF.
0.25±0.05 1.50 REF.
0.20±0.03 1.60 REF.
L822-1
8
L1022-1
10
PACKAGE OUTLINE,
6, 8, 10L uDFN, 2x2x0.80 mm
2
21-0164
A
-DRAWING NOT TO SCALE-
2
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products. Inc.
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