MAX4989ETD+T [MAXIM]
Multiplexers/Switches, 1 Func, BICMOS, PDSO14,;
| 型号： | MAX4989ETD+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Multiplexers/Switches, 1 Func, BICMOS, PDSO14, 信息通信管理 光电二极管 |
| 文件： | 总8页 (文件大小：108K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4206; Rev 0; 8/08
USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch
MAX489
General Description
Features
The MAX4989 is a bidirectional 2-of-4 USB 2.0 cross-
point switch. The MAX4989 features the low on-capaci-
tance and low on-resistance necessary to switch USB
2.0 low-/full-/Hi-Speed signals at data rates up to
480Mbps. This device allows any 2-of-4 USB pairs to
be connected together and is configured through a
simple 3-input control logic interface.
o Single +2.7V to +5.5V Supply Voltage
o Low 1µA (typ) Supply Current
o -3dB Bandwidth: 1GHz (typ)
o Low 5Ω (typ) R
ON
The MAX4989 operates from a single +2.7V to +5.5V
supply and features an internal charge pump to permit
full rail-to-rail swing. This device also features a high-
impedance shutdown mode to reduce supply current to
100nA (typ).
o High-Impedance Shutdown Mode
o Logic Inputs Control Signal Routing
o +1.8V CMOS-Logic Compatible
The MAX4989 is available in a 14-pin, 3mm x 3mm
TDFN package and operates over the extended -40°C
to +85°C temperature range.
o Ultra-Small 14-Pin, 3mm x 3mm, TDFN Package
Applications
Ordering Information
Notebook Computers
Cell Phones
PIN-
PACKAGE
PKG
CODE
PART
TEMP RANGE
14 TDFN-EP*
(3mm x 3mm)
MAX4989ETD+ -40°C to +85°C
T1433-2
+Denotes a lead-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configuration
TOP VIEW
1
2
3
4
5
6
7
14
13
12
Y-
Y+
W-
+
W+
GND
Z+
GND
11 X+
10 X-
MAX4989
Z-
C0
9
8
V
CC
*EP
C1
C2
3mm x 3mm TDFN
*EP = EXPOSED PAD. CONNECT EP TO GROUND.
________________________________________________________________ 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.
USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND.)
Junction-to-Case Thermal Resistance (Θ ) (Note 1)
JC
V
....................................................................... -0.3V to +6.0V
14-Pin TDFN ................................................................. 8°C/W
CC
C_ ......................................................................... -0.3V to +6.0V
W_, X_, Y_, Z_ ........................................... -0.3V to (V + 0.3V)
Continuous Current C_ .................................................... 30mA
Continuous Current W_, X_, Y_, Z_................................ 120mA
Peak Current W_, X_, Y_, Z_
Junction-to-Ambient Thermal Resistance (Θ ) (Note 1)
JA
14-Pin TDFN ............................................................... 41°C/W
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
CC
(pulsed at 1ms, 10% duty cycle) .............................. 240mA
Continuous Power Dissipation (T = +70°C)
A
MAX489
14-Pin TDFN (derate 24.4mW/°C above +70°C) ..... 1951mW
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer
board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
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
= +2.7V to +5.5V, T = -40°C to +85°C, unless otherwise noted. Typical values are at V
= +3.3V, T = +25°C.) (Note 2)
CC A
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
5.5
UNITS
Operating Power-Supply Range
V
2.7
V
CC
V
V
= +3.3V
= +5.5V
1
3
3.5
CC
CC
Supply Current
I
Switch enabled
µA
µA
V
CC
6.5
Shutdown Supply Current
Analog Signal Range
On-Resistance
I
C1 = C2 = C3 = GND or V
0.1
0.5
SHDN
CC
V
, V ,
W_ X_
0
V
CC
9
V
,V
Y_ Z_
R
V
V
= +3.0V, I = 10mA (Note 3)
OUT
5
Ω
ON
IN
On-Resistance Match Between
Channels
= +3.3V, V = +1.5V,
IN
CC
ΔR
0.5
Ω
ON
I
= 10mA (Note 3)
OUT
V
= +3.3V, V = 0V to V
= 10mA (Notes 3, 4, 5)
,
CC
IN
CC
On-Resistance Flatness
Off-Leakage Current
On-Leakage Current
R
0.4
Ω
FLAT
I
OUT
V
= +5.5V, V = 0V or V , V
= V
=
CC
IN
CC OUT
CC
I
-1
-1
+1
+1
µA
µA
IN(OFF)
or 0V or unconnected (Note 3)
= +5.5V, V = 0V or V , V
CC OUT
V
CC
IN
I
IN(ON)
unconnected (Note 3)
AC PERFORMANCE (Note 4)
On-Channel -3dB Bandwidth
Insertion Loss
BW
R = R = 50Ω, V = 0dBm, Figure 1
1
GHz
dB
L
S
IN
S
R = R = 50Ω, f = 10MHz
0.5
-43
-15
12
L
S
f = 10MHz, V = 0dBm, R = R = 50Ω
IN
L
S
Off-Isolation (Note 3) Figure 1
Crosstalk
V
dB
dB
ISO
f = 250MHz, V = 0dBm, R = R = 50Ω
IN
L
S
f = 50MHz, V = 0dBm, R = R = 50Ω,
IN
L
S
V
-50
CT
between adjacent pairs (Note 3), Figure 1
2
_______________________________________________________________________________________
USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch
MAX489
ELECTRICAL CHARACTERISTICS (continued)
(V
= +2.7V to +5.5V, T = -40°C to +85°C, unless otherwise noted. Typical values are at V
= +3.3V, T = +25°C.) (Note 2)
CC A
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DYNAMIC (Note 4)
V
V
= +1.5V, R = 300Ω, C = 35pF,
L L
IN
Turn-On Time
t
15
2
100
6
µs
µs
ON
= 0V to V , Figure 2
C_
CC
V
V
= +1.5V, R = 300Ω, C = 35pF,
L L
IN
Turn-Off Time
t
OFF
= 0V to V , Figure 2
C_
CC
Propagation Delay
t
, t
R = R = 50Ω, Figure 3
120
50
ps
ps
ps
PLH PHL
L
S
Output Skew Between Switches
Output Skew Same Switch
t
R = R = 50Ω, Figure 3
L S
SK(O)
t
R = R = 50Ω, Figure 3
50
SK(P)
L
S
f = 1MHz, V
= 0V, V = 0.5V
13.5
BIAS
IN
P-P
Off-Capacitance
On-Capacitance
C
pF
pF
OFF
f at -3dB = 240MHz, V
= 0V,
BIAS
4
V
= 0.5V
P-P
IN
f = 1MHz, V
= 0V, V = 0.5V
IN
BIAS
P-P
C
6
ON
f at -3dB = 240MHz, V
= 0V,
BIAS
V
= 0.5V
P-P
IN
LOGIC INPUTS
Input Logic High
V
1.7
-1
V
V
IH
Input Logic Low
V
0.5
+1
IL
Input Logic Hysteresis
Input Leakage Current
V
75
mV
µA
HYST
I
V
= +5.5V, V = GND or V
C_ CC
IN
CC
Note 2: All devices are 100% production tested at T = +25°C. All temperature limits are guaranteed by design.
A
Note 3: IN and OUT refer to input and output terminals (W_, X_, Y_, Z_) of any switch configuration.
Note 4: Not production tested. Guaranteed by design.
Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance, as measured over specified
analog signal ranges.
_______________________________________________________________________________________
3
USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch
Test Circuits/Timing Diagrams
V
V
OUT
OFF-ISOLATION = 20log
ON-LOSS = 20log
IN
NETWORK
ANALYZER
V
50Ω
50Ω
OUT
V
V
0V OR V
IN
CC
C_
V
IN
IN
MAX489
V
V
MAX4989
OUT
CROSSTALK = 20log
OFF
IN
MEAS
REF
OUT
OUT
50Ω
50Ω
50Ω
IN, OUT, AND OFF DEPEND ON SWITCH CONFIGURATION.
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN IN AND OFF TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN IN AND OUT 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
MAX4989
t < 5ns
t < 5ns
f
r
V
IH
LOGIC
INPUT
50%
V
IL
IN
OUT
V
N_
V
OUT
t
OFF
R
L
C
L
C_
V
OUT
0.9 x V
0.9 x V
OUT
0UT
LOGIC
INPUT
SWITCH
OUTPUT
0V
t
ON
C INCLUDES FIXTURE AND STRAY CAPACITANCE.
L
IN AND OUT DEPEND ON SWITCH CONFIGURATION.
R
L
V
OUT
= V
IN
(
)
R + R
ON
L
Figure 2. Switching Time
4
_______________________________________________________________________________________
USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch
MAX489
Test Circuits/Timing Diagrams (continued)
MAX4989
R
R
S
OUT+
OUT-
IN+
IN-
V
V
IN+
OUT+
t
t
t
t
= t
OR t
OR t
- t
PLH PLHX
PLHY
PHLY
= t
PHL PHLX
= |t
| OR |t
| OR |t
- t
|
|
R
R
SK(0)
PLHX PLHY
PHLX PHLY
L
= |t
- t
- t
SK(P)
PLHX PHLX
PLHY PHLY
IN AND OUT DEPEND ON SWITCH
CONFIGURATION
S
V
V
IN-
OUT-
L
C_
V
IL
TO V
IH
t
INFALL
t
INRISE
10%
V+
90%
90%
V
IN+
50%
50%
50%
10%
0V
CC
V
V
50%
IN-
0V
CC
t
t
OUTRISE
OUTFALL
t
t
PLHX
PHLX
V
90%
90%
V
OUT+
50%
50%
10%
10%
0V
CC
V
50%
50%
V
OUT-
0V
t
t
PHLY
PLHY
Figure 3. Output Signal Skew, Rise/Fall Time, Propagation Delay
_______________________________________________________________________________________
5
USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch
Typical Operating Characteristics
(V
= +3.3V, T = +25°C, unless otherwise noted.)
A
CC
ON-RESISTANCE
vs. INPUT VOLTAGE
ON-RESISTANCE
vs. INPUT VOLTAGE
LEAKAGE CURRENT
vs. TEMPERATURE
6.0
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
100
80
60
40
20
0
I
= 10mA
I
= 10mA
OUT
V
V
= V
CC
OUT
IN
= UNCONNECTED
OUT
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
ON-LEAKAGE
OFF-LEAKAGE
T
= +85°C
T
= +25°C
T = -40°C
A
V
V
= 2.7V
= 5.5V
A
A
CC
CC
MAX489
-20
0
2
4
0
1
2
3
-40
-15
10
35
60
85
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
TEMPERATURE (°C)
INPUT LOGIC THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY CURRENT
vs. TEMPERATURE
FREQUENCY RESPONSE
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
850
840
830
820
810
800
790
780
770
760
750
10
0
SWITCH ENABLED
-10
-20
V
ON-LOSS
IH
OFF-ISOLATION
-30
-40
V
IL
-50
-60
-70
CROSSTALK
100
2.7
3.4
4.1
4.8
5.5
10
1000
-40
-15
10
35
60
85
SUPPLY VOLTAGE (V)
FREQUENCY (MHz)
TEMPERATURE (°C)
6
_______________________________________________________________________________________
USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch
MAX489
Pin Descriptions
PIN
1
NAME
Y-
FUNCTION
Inverting Input/Output of Terminal Y
Noninverting Input/Output of Terminal Y
Ground
2
Y+
3
GND
Z+
4
Noninverting Input/Output of Terminal Z
Inverting Input/Output of Terminal Z
Control Input 0
5
Z-
6
C0
7
C1
Control Input 1
8
C2
Control Input 2
Positive Supply Voltage Input. Bypass V
the device.
to GND with a 0.1µF ceramic capacitor as close as possible to
CC
9
V
CC
10
11
12
13
14
X-
X+
Inverting Input/Output of Terminal X
Noninverting Input/Output of Terminal X
Ground
GND
W+
W-
Noninverting Input/Output of Terminal W
Inverting Input/Output of Terminal W
Exposed Pad. EP can be connected to GND or left unconnected. EP is not intended as an electrical
connection point.
—
EP
USB Switching
Detailed Description
The low on-resistance and low on-capacitance of the
MAX4989 make it ideal for high-performance Hi-Speed
USB 2.0 switching applications. The MAX4989 is ideal
for routing USB data lines and for applications that
require switching between multiple USB hosts or
devices (Figure 4).
The MAX4989 is a USB 2.0 bidirectional crosspoint
switch that allows the user to connect any 2 of 4 USB
pairs. The device operates from a single +2.7V to
+5.5V supply and features an internal charge pump
to permit the full rail-to-rail swing necessary for USB
low-/full-/Hi-Speed applications with data rates up to
480Mbps.
Layout
Hi-Speed USB requires careful PCB layout with con-
trolled-impedance matched traces of equal lengths.
Ensure that bypass capacitors are as close as possible
to the device. Use large ground planes where possible.
Control Logic Inputs
The MAX4989 provides three control logic inputs, C0,
C1, and C2, to control the switch connections as
shown in the Functional Diagram/Truth Table. Driving
the control logic inputs rail-to-rail minimizes power
consumption.
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.
Shutdown Mode
The MAX4989 features a shutdown mode that reduces
the supply current to less than 0.5µA and places all
switch terminals in high impedance. Drive all control
inputs high or all control inputs low to place the device in
shutdown mode (see Functional Diagram/Truth Table.)
Proper power-supply sequencing is recommended for
all devices. Always apply V
before applying signals,
CC
especially if the signal is not current limited.
Chip Information
PROCESS: BiCMOS
_______________________________________________________________________________________
7
USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch
Functional Diagram/Truth Table
Applications Information
V
+3.3V
CC
0.1μF
D+
D-
D+
D-
MAX4989
USB
TRANSCEIVER
A
USB
PERIPHERAL
1
V
CC
Y+
Y-
W+
W-
Y+
W+
MAX489
MAX4989
Z+
Z-
X+
X-
D+
D-
D+
D-
USB
TRANSCEIVER
B
USB
PERIPHERAL
2
Z+
Y-
X+
C0 C1 C2
GND
W-
GPIO CONTROL
Figure 4. Typical Application Circuit
Z+
X+
CONTROL LOGIC
C2 C1 C0
MAX4989
GND
SWITCH
SHUTDOWN
C2 C1 C0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
W AND X CONNECTED
W AND Y CONNECTED
W AND Z CONNECTED
X AND Z CONNECTED
X AND Y CONNECTED
Y AND Z CONNECTED
SHUTDOWN
Package Information
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages.
PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
14 TDFN
T1433-2
21-0137
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.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2008 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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