19-0616; Rev 0; 7/06
KIT
ATION
EVALU
BLE
AVAILA
USB 2.0 High-Speed, Fault-Tolerant 3:1, 4:1
Multiplexers
General Description
The MAX4899E/MAX4899AE analog multiplexers com-
bine the low on-capacitance (C
ON
) and low on-resis-
tance (R
ON
) necessary for high-performance switching
applications. These devices are designed for USB 2.0
high-speed applications at 480Mbps. The MAX4899E/
MAX4899AE also handle all the requirements for USB
low- and full-speed signaling.
The MAX4899E is a dual 3:1 multiplexer whereas the
MAX4899AE is a dual 4:1 multiplexer. The MAX4899E/
MAX4899AE feature two digital inputs, C
0
and C
1
, to con-
trol the analog signal path. Typical applications include
switching a USB connector between USB and other oper-
ations such as serial communications, audio, and video.
An enable input (EN) is provided to disable all channels
and place the device into a high-impedance (off) state,
as well as reducing power consumption.
The MAX4899E/MAX4899AE operate from a 2.7V to
3.6V power-supply voltage and are protected against
+5.5V shorts to COM
A
- and COM
A
+. In addition,
COM
A
+ and COM
A
- are normally connected to outside
circuitry and feature ±15kV ESD protection. The
MAX4899E/MAX4899AE are available in a 3mm x 3mm,
16-pin TQFN package and operate over the -40°C to
+85°C temperature range.
COM
A
+ AND COM
A
- (V)
Features
♦
Single 2.7V to 3.6V Power-Supply Voltage
♦
Low 4Ω (typ) On-Resistance (R
ON
)
♦
-3dB Bandwidth: 425MHz
♦
Fault Tolerant to Meet Full USB 2.0 Specification
♦
COM_ Protected to ±15kV ESD Protection per
Human Body Model (MIL-STD-883; Method 3015)
♦
Low Operating Current (200µA), Ultra-Low
Quiescent Current (3.0µA max) in Standby Mode
♦
Low Threshold Eliminates the Need for
Translators in 1.8V Low Voltage Systems
♦
Tiny 16-Pin, 3mm x 3mm, Lead-Free TQFN Package
MAX4899E/MAX4899AE
Eye Diagram
0.5
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
TIME (ns)
NOTE:
UI = 2.08ns
MASK = USB 2.0 HIGH SPEED
Applications
Cell Phones
Digital Still Cameras
PDAs
Digital Video Cameras
MPEG-4 Players
Portable GPS
Combination Products
KVM
Pin Configurations appear at end of data sheet.
Ordering Information/Selector Guide
PART
MAX4899EETE+
MAX4899AEETE+
PIN-PACKAGE
16 TQFN-EP*
16 TQFN-EP*
MUX CONFIGURATION
DUAL 3:1
DUAL 4:1
TOP MARK
AEY
AEZ
PKG CODE
T1633-4
T1633-4
Note:
All devices are specified over the -40°C to +85°C operating temperature range.
+Denotes
lead-free package.
*EP
= Exposed paddle.
________________________________________________________________
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.
USB 2.0 High-Speed, Fault-Tolerant 3:1, 4:1
Multiplexers
MAX4899E/MAX4899AE
ABSOLUTE MAXIMUM RATINGS
(All Voltages Referenced to GND.)
V+ .............................................................................-0.3V to +4V
QP, EN,
C
0
, C
1
, (Note 1) ..........................................-0.3V to +4V
COM
A+
, COM
A
_, USB0+, USB0-, USB1+, USB1-, USB2+,
USB2-, USB3+, USB3- ......................................-0.3V to +5.5V
Continuous Current (COM
A
_ to USB_) ...........................±120mA
Peak Current (COM
A
_ to USB_)
(pulsed at 1ms, 10% duty cycle).................................±240mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TQFN (derate 20.8mW/°C above +70°C) ........1667mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1:
Signals exceeding 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+ = +2.7V to +3.6V, T
A
= -40°C to +85°C,
QP
= low,
EN
= low, unless otherwise noted. Typical values are at V+ = +3.3V and T
A
=
+25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ANALOG SWITCH (COM
A
_, USB__)
V+ = 2.7V, I
COMA_
= T
A
= +25°C
-10mA, V
COMA_
= 0V,
T
A
= -40°C to +85°C
1.5V,
QP
= low
V+ = 2.7V, I
COMA_
=
-10mA, V
COM_
= 0V,
1.5V, 2.7V,
QP
= low
On-Resistance
R
ON
V+ = 2.7V, I
COMA_
= T
A
= +25°C
-10mA, V
COMA_
= 0V,
T
A
= -40°C to +85°C
1.5V,
QP
= high
V+ = 3.0V, I
COMA_
= T
A
= +25°C
-10mA, V
COMA_
= 0V,
T
A
= -40°C to +85°C
1.5V,
QP
= high
On-Resistance Match Between
Channels
On-Resistance Flatness
Off-Leakage Current
On-Leakage Current
Quiescent Supply Current
Fault-Protection Trip Threshold
ESD PROTECTION
COM
A
+, COM
A
-
Human Body Model
±15
kV
ΔR
ON
V+ = 2.7V, I
COMA_
= T
A
= +25°C
-10mA, V
COMA_
= 0V,
T
A
= -40°C to +85°C
1.5V, 2.7V
V+ = 2.7V, I
COMA_
= -10mA, V
COMA_
= 0V,
1.5V, 2.7V
V+ = 3.6V, V
COMA_
= V
USB__
= 0.3V, 3.3V
V+ = 3.6V, V
COMA_
= V
USB__
= 0.3V, 3.3V
V+ = 3.6V, C
0
= C
1
=
0 or V+
V+ = 3.3V
QP
= low
QP
= high
3.6
3.9
-1
-1
250
8
17
18
4
12
13
0.5
0.8
1.0
0.5
1.1
+1
+1
600
3
4.2
Ω
µA
µA
µA
V
Ω
T
A
= +25°C
T
A
= -40°C to +85°C
4
5
6
4
7
8
Ω
R
FLAT (ON)
I
L(OFF)
I
L(ON)
I+
V
FP
2
_______________________________________________________________________________________
USB 2.0 High-Speed, Fault-Tolerant 3:1, 4:1
Multiplexers
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +2.7V to +3.6V, T
A
= -40°C to +85°C,
QP
= low,
EN
= low, unless otherwise noted. Typical values are at V+ = +3.3V and T
A
=
+25°C.) (Note 2)
PARAMETER
On-Loss
Crosstalk
Off-Isolation
Charge-Pump Noise
Bandwidth -3dB
Off-Capacitance
On-Capacitance
Propagation Delay
Output Skew Same Switch
Fault-Protection Response Time
Fault-Protection Recovery Time
Charge Injection
Enable Turn-On Time
Enable Turn-Off Time
Address Transition Time
Total Harmonic Distortion Plus
Noise
SWITCH LOGIC (QP,
EN,
C
0
, C
1
)
Logic-Input Voltage Low
Logic-Input Voltage High
Input Logic Hysteresis
Input Leakage Current
V
IL
V
IH
V
HYST
I
LEAK
V+ = 3.6V, C
0
= 0 or V+, C
1
= 0 or V+
-1
1.4
100
1
0.4
V
V
mV
µA
SYMBOL
ON
LOSS
V
CT1
,
V
DCT1
V
ISO
V
QP
BW
C
OFF
C
ON
t
PD
t
SK
t
FP
t
FPR
Q
t
ON
t
OFF
t
TRANS
THD+N
CONDITIONS
f = 10MHz, 0 < V
IN
< 1V, Figure 1
f = 50MHz, Figure 1
f = 50MHz, Figure 1
COM
A
_, USB_, R
L
= R
S
= 50Ω (Note 4)
R
S
= R
L
= unbalanced 50Ω
f = 1MHz, COM
A
_, USB_, Figure 2
f = 1MHz, COM
A
_, USB_, Figure 2
R
L
= R
S
= 50Ω, Figure 3
Skew between opposite transitions in same
switch, Figure 3
V
COMA_
= 0V to 5V to V
USB__
= 2.5V, R
L
=
50Ω, C
L
= 10pF, Figure 4
V
COMA_
= 5V to 3V to V
USB__
= 1.5V, R
L
=
50Ω, C
L
= 10pF, Figure 4
V
GEN
= 0, C
L
= 1000pF, Figure 5
V
USB0+
= V+, R
L
= 50Ω, C
L
= 10pF, Figure 6
V
USB0+
= V+, R
L
= 50Ω, C
L
= 10pF, Figure 6
V
USB0+
= V+, R
L
= 50Ω, C
L
= 10pF, Figure 7
f = 20Hz to 20kHz, V
COMA_
= 1V
P-P
, R
L
=
600Ω
MIN
TYP
0.5
-50
-45
100
425
10.5
15
200
100
1
1
25
2.8
3
1.2
0.02
MAX
UNITS
dB
dB
dB
µV
MHz
pF
pF
ps
ps
µs
µs
pC
µs
ns
µs
%
MAX4899E/MAX4899AE
SWITCH AC PERFORMANCE (Note 3)
Note 2:
Limits at -40°C are guaranteed by design.
Note 3:
Guaranteed by design.
Note 4:
Charge-pump noise is specified as a peak-to-peak value.
_______________________________________________________________________________________
3
USB 2.0 High-Speed, Fault-Tolerant 3:1, 4:1
Multiplexers
MAX4899E/MAX4899AE
Typical Operating Characteristics
(V+ = 3.3V,
QP
=
EN
= low, T
A
= +25°C, unless otherwise noted.)
ON-RESISTANCE vs. V
COM
MAX4899E toc01
MAX4899E toc02
2.98
2.96
2.94
R
ON
(Ω)
V+ = 2.7V
3.4
3.2
T
A
= +85°C
R
ON
(Ω)
5000
4500
LEAKAGE CURRENT (pA)
4000
3500
3000
2500
2000
1500
1000
500
0
-500
V+ = 3.6V
2.92
2.90
2.88
2.86
2.84
2.82
2.80
0
0.6
1.2
V+ = 3.3V
3.0
2.8
T
A
= +25°C
2.6
2.4
T
A
= -40°C
2.2
2.0
0
1.1
V
COM
(V)
2.2
3.3
COM 0N-LEAKAGE
V+ = 3.6V
COM 0FF-LEAKAGE
1.8
V
COM
(V)
2.4
3.0
3.6
-40
-15
10
35
60
85
TEMPERATURE (°C)
CHARGE INJECTION vs. V
COM
MAX4899E toc04
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX4899E toc05
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
0.9
0.8
LOGIC THRESHOLD (V)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
V
IL
V
IH
MAX4899E toc06
30
C
L
= 1000pF
25
CHARGE INJECTION (pC)
20
15
10
5
0
0
1.1
V
COM
(V)
2.2
300
QUIESCENT SUPPLY CURRENT (μA)
280
260
240
220
200
180
160
140
120
100
V+ = 2.7V
V+ = 3.3V
V+ = 3.6V
1.0
3.3
-40
-15
10
35
60
85
2.7
3.0
3.3
3.6
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
FREQUENCY RESPONSE
MAX4899E toc07
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX4899E toc08
EYE DIAGRAM
0.5
0.4
0.3
COM
A
+ AND COM
A
- (V)
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
MAX4899E toc09
0
-10
-20
-30
OFF-ISOLATION
ON-RESPONSE
0.1
R
L
= 600Ω
-50
-60
-70
-80
-90
-100
1
10
100
1000
FREQUENCY (MHz)
CROSSTALK
THD+N (%)
LOSS (dB)
-40
0.01
10
100
1k
FREQUENCY (Hz)
10k
100k
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
TIME (ns)
4
_______________________________________________________________________________________
MAX4899E toc03
3.00
ON-RESISTANCE vs. V
COM
3.6
5500
LEAKAGE CURRENT vs. TEMPERATURE
USB 2.0 High-Speed, Fault-Tolerant 3:1, 4:1
Multiplexers
Pin Description
PIN
MAX4899E
1
2
3
4
5
6
7, 8
—
—
9
10
11
12
13
14
15
MAX4899AE
1
2
3
4
5
6
—
7
8
9
10
11
12
13
14
15
NAME
GND
COM
A
+
COM
A
-
V+
C
1
C
0
N.C.
USB3-
USB3+
USB2-
USB2+
USB1+
USB1-
USB0+
USB0-
EN
Ground
Analog Switch Common D+ Terminal
Analog Switch Common D- Terminal
Positive Supply-Voltage Input. Connect V+ to a 2.7V to 3.6V supply voltage. Bypass V+
to GND with a 0.1µF capacitor placed as close as possible to the device.
Digital Control Input 1. C
1
and C
0
control the analog signal path as shown in the
Functional Diagrams section.
Digital Control Input 0. C
1
and C
0
control the analog signal path as shown in the
Functional Diagrams section.
No Connection. Not internally connected.
Analog Switch 3 D- Terminal
Analog Switch 3 D+ Terminal
Analog Switch 2 D- Terminal
Analog Switch 2 D+ Terminal
Analog Switch 1 D+ Terminal
Analog Switch 1 D- Terminal
Analog Switch 0 D+ Terminal
Analog Switch 0 D- Terminal
Active-Low Enable Input. For normal operation, drive
EN
low. Drive
EN
high to place all
channels in a high-impedance state. The internal charge pump is turned off when
EN
is
a logic-high.
Active-Low Charge-Pump Enable Input. Drive
QP
low for normal operation. Drive
QP
high to disable the charge pump with the switches still active at a reduced analog signal
range and higher R
ON
.
Exposed Paddle. Connect EP to GND.
FUNCTION
MAX4899E/MAX4899AE
16
—
16
—
QP
EP
_______________________________________________________________________________________
5
Linux开发
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
