19-4035; Rev 2; 9/08
KIT
ATION
EVALU
BLE
AVAILA
Hi-Speed USB 2.0 Switches
with ±15kV ESD
Features
♦
USB Hi-Speed Switching
♦
ESD Protection on COM
±15kV Human Body Model
±15kV IEC 61000-4-2 Air Gap
±8kV IEC 61000-4-2 Contact
♦
Power-Supply Range: +2.8V to +5.5V
♦
Low 5Ω (typ) On-Resistance (R
ON
)
♦
-3dB Bandwidth: 950MHz (typ)
♦
Compatible with Logic I/O Down to 1.4V
♦
COM Analog Inputs Fault Protected Against
Shorts to +5.5V
♦
Low Supply Current 0.6µA (typ)
♦
Enable Input:
Active-Low (EN) MAX4983E
Active-High (EN) MAX4984E
♦
Small 10-Pin, 1.4mm x 1.8mm UTQFN
General Description
The MAX4983E/MAX4984E are high ESD-protected
analog switches that combine the low on-capacitance
and low on-resistance necessary for high-performance
switching applications. COM1 and COM2 are protected
against ±15kV ESD without latchup or damage. The
devices are ideal for USB 2.0 Hi-Speed applications at
480Mbps. The switches also handle all the require-
ments for USB low- and full-speed signaling.
The MAX4983E/MAX4984E double-pole/double-throw
(DPDT) switches are fully specified to operate from a
single +2.8V to +5.5V power supply and are protected
against a +5.5V short to COM1 and COM2. This feature
makes the MAX4983E/MAX4984E fully compliant with
the USB 2.0 specification of VBUS fault protection. The
devices feature low-threshold-voltage logic inputs, per-
mitting them to be used with low I/O voltage systems.
The MAX4983E features an active-low enable input
(EN) that when driven high sets the device in shutdown
mode. The MAX4984E features an active-high enable
input (EN) that when driven low sets the device in shut-
down mode. When the device is in shutdown mode, the
quiescent supply current is reduced to 0.1µA.
The MAX4983E/MAX4984E are available in a space-
saving, 10-pin, 1.4mm x 1.8mm UTQFN package, and
operate over a -40°C to +85°C temperature range.
MAX4983E/MAX4984E
Ordering Information
PART
MAX4983EEVB+
MAX4984EEVB+
PIN-PACKAGE
10 Ultra-Thin QFN
10 Ultra-Thin QFN
TOP MARK
AAA
AAB
Applications
Cell Phones
PDAs
Digital Still Cameras
GPS
Notebook Computers
Video Switching
Bus Switches
Note:
All devices operate over the -40°C to +85°C extended
temperature range.
+Denotes
a lead-free package.
Eye Diagram
MAX4983E
MAX4984E
Pin Configuration
NC2
8
9
10
7
NO2
6
TOP VIEW
EN (EN)
V
CC
USB 2.0
Hi-SPEED
TRANSMIT
TEMPLATE
5
4
3
COM2
GND
COM1
MAX4983E/
MAX4984E
CB
1
NC1
2
NO1
UTQFN
(EN) FOR MAX4984E ONLY.
________________________________________________________________
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.
Hi-Speed USB 2.0 Switches
with ±15kV ESD
MAX4983E/MAX4984E
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
V
CC
, COM_, NO_, NC_, EN,
EN,
CB .................... -0.3V to +6.0V
Continuous Current into Any Terminal............................. ±30mA
Continuous Power Dissipation (T
A
= +70°C)
10-Pin UTQFN (derate 6.9mW/°C above +70°C)........ 559mW
Junction-to-Case Thermal Resistance (θ
JC
) (Note 1)
10-Pin UTQFN ...........................................................20.1°C/W
Junction-to-Ambient Thermal Resistance (θ
JA
) (Note 1)
10-Pin UTQFN ........................................................ 143.1°C/W
Operating Temperature Range .......................... -40°C to +85°C
Junction Temperature Range ......................................... +150°C
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (soldering 10s) ..................................+300°C
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
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
CC
= +2.8V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3.0V, T
A
= +25°C.) (Note 2)
PARAMETER
Operating Power-Supply Range
Supply Current
Shutdown Supply Current
Increase in Supply Current
with V
CB
, V
EN
Voltage
Analog Signal Range
Fault-Protection Trip Threshold
On-Resistance
On-Resistance Match Between
Channels
On-Resistance Flatness
SYMBOL
V
CC
I
CC
I
SHDN
V
CB
= 0V or V
CC
,
V
EN
= 0V or V
EN
= V
CC
V
CC
= 3.0V
V
CC
= 5.5V
CONDITIONS
MIN
2.8
0.6
3
0.1
2
0
V
CC
+
0.6
V
CC
+
0.8
5
5.5
0.1
0.1
-250
+250
180
-250
+250
1
V
CC
V
CC
+
1
10
TYP
MAX
5.5
1.5
6.5
UNITS
V
µA
µA
µA
V
V
Ω
Ω
Ω
nA
µA
nA
Switch disabled (V
EN
= V
CC
or V
EN
= 0V)
0
≤
V
CB
≤
V
IL
or V
IH
≤
V
CB
≤
V
CC
or 0
≤
V
EN
≤
V
IL
or V
IH
≤
V
EN
≤
V
CC
V
COM
, V
NO
,
V
EN
= V
CC
or V
EN
= 0V (Note 3)
V
NC
V
FP
R
ON
ΔR
ON
R
FLAT
COM_ only, T
A
= +25°C
V
COM
= 0V to V
CC
V
COM
= 3.6V, V
CC
= 3.0V
V
CC
= 3.0V, V
COM
= 2V (Note 4)
V
CC
= 3.0V, V
COM
= 0V to V
CC
(Note 5)
V
CC
= 4.5V, V
COM
= 0V or 4.5V,
V
NO
, V
NC
= 4.5V or 0V
V
CC
= 5.5V, V
COM
= 0V or 5.5V,
V
NO
, V
NC
with 50µA sink current to GND
V
CC
= 5.5V, V
COM
= 0V or 5.5V,
V
NO
, V
NC
= unconnected
R
L
= R
S
= 50Ω, signal = 0dBm
V
NO
, V
NC
= 0dBm,
R
L
= R
S
= 50Ω
(Figure 1)
f = 10MHz
f = 250MHz
f = 500MHz
Off-Leakage Current
I
COM(OFF)
On-Leakage Current
AC PERFORMANCE
On-Channel -3dB Bandwidth
Off-Isolation
I
COM(ON)
BW
V
ISO
950
-48
-20
-17
MHz
dB
2
_______________________________________________________________________________________
Hi-Speed USB 2.0 Switches
with ±15kV ESD
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.8V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3.0V, T
A
= +25°C.) (Note 2)
PARAMETER
Crosstalk (Note 6)
LOGIC INPUT
Input Logic-High
Input Logic-Low
Input Leakage Current
DYNAMIC
Turn-On Time
Turn-Off Time
Propagation Delay
Fault Protection Response
Time
Fault Protection Recovery
Time
Output Skew Between
Switches
NO_ or NC_ Off-Capacitance
COM Off-Capacitance
(Figure 5, Note 7)
COM On-Capacitance
(Figure 5, Note 7)
Total Harmonic Distortion Plus
Noise
ESD PROTECTION
Human Body Model
COM1, COM2
All Pins
IEC 61000-4-2 Air-Gap Discharge
IEC 61000-4-2 Contact Discharge
Human Body Model
±15
±15
±8
±2
kV
t
ON
t
OFF
t
PLH
, t
PHL
t
FP
t
FPR
t
SK
V
NO
or V
NC
= 1.5V, R
L
= 300Ω, C
L
= 35pF,
V
EN
= V
CC
to 0V or V
EN
= 0V to V
CC
(Figure 2)
V
NO
or V
NC
= 1.5V, R
L
= 300Ω, C
L
= 35pF,
V
EN
= V
CC
to 0V or V
EN
= 0V to V
CC
(Figure 2)
R
L
= R
S
= 50Ω, Figure 3
V
COM
= 0V to 5V step, R
L
= R
S
= 50Ω,
V
CC
= 3.3V (Figure 4)
V
COM
= 5V to 0V step, R
L
= R
S
= 50Ω,
V
CC
= 3.3V (Figure 4)
Skew between switch 1 and 2, R
L
= R
S
= 50Ω,
(Figure 3, Note 7)
40
2
5.5
4.8
6.5
5.5
0.03
0.5
20
1
100
5.0
100
100
5
µs
µs
ps
µs
µs
ps
pF
pF
pF
%
V
IH
V
IL
I
IN
-250
1.4
0.5
+250
V
V
nA
SYMBOL
V
CT
CONDITIONS
V
NO
, V
NC
= 0dBm,
R
L
= R
S
= 50Ω,
Figure 1
f = 10MHz
f = 250MHz
f = 500MHz
MIN
TYP
-73
-54
-33
dB
MAX
UNITS
MAX4983E/MAX4984E
C
NO(OFF)
or
f = 1MHz (Figure 5, Note 7)
C
NC(OFF)
C
COM(OFF)
C
COM(ON)
THD+N
f = 1MHz
f = 240MHz
f = 1MHz
f = 240MHz
V
COM
= 1V
P-P
, V
BIAS
= 1V, R
L
= R
S
= 50Ω,
f = 20Hz to 20kHz
All devices are 100% production tested at T
A
= +25°C. All temperature limits are guaranteed by design.
The switch turns off for voltages above V
FP
, protecting downstream circuits in case of a fault condition.
ΔR
ON(MAX)
= ABS(R
ON(CH1)
- R
ON(CH2)
).
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, and output skew between switches are not production tested; guaranteed by
design.
Note 2:
Note 3:
Note 4:
Note 5:
_______________________________________________________________________________________
3
Hi-Speed USB 2.0 Switches
with ±15kV ESD
MAX4983E/MAX4984E
Test Circuits/Timing Diagrams
V
OUT
V
IN
V
OUT
V
IN
OFF-ISOLATION = 20log
NETWORK
ANALYZER
0V OR V
CC
CB
COM1
V
IN
50Ω
50Ω
CROSSTALK = 20log
NC1
50Ω
MAX4983E/
MAX4984E
NO1*
V
OUT
MEAS
REF
50Ω
50Ω
SWITCH IS ENABLED.
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" 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.
*FOR CROSSTALK THIS PIN IS NO2.
NC2 AND COM2 ARE OPEN.
Figure 1. Off-Isolation and Crosstalk
MAX4983E/
MAX4984E
NO
OR NC
R
L
EN (EN)
LOGIC
INPUT
C
L
COM
LOGIC
INPUT
V
OUT
V
IH
50%
V
IL
t
OFF
V
OUT
0.9 x V
0UT
t R < 5ns
t F < 5ns
V
IN_
SWITCH
OUTPUT
0V
t
ON
0.1 x V
OUT
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
R
L
V
OUT
= V
IN_
R
L
+ R
ON
(
)
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 2. Switching Time
4
_______________________________________________________________________________________
Hi-Speed USB 2.0 Switches
with ±15kV ESD
Test Circuits/Timing Diagrams (continued)
MAX4983E/MAX4984E
R
S
V
IN+
NC1 OR
NO1
MAX4983E/
MAX4984E
COM1
R
L
V
OUT+
t
PLH
= t
PLHX
OR t
PLHY
t
PHL
= t
PHLX
OR t
PHLY
t
SK(O)
= |t
PLHX
- t
PLHY
| OR |t
PHLX
- t
PHLY
|
t
SK(P)
= |t
PLHX
- t
PHLX
| OR |t
PLHY
- t
PHLY
|
R
S
V
IN-
NC2 OR
NO2
COM2
R
L
CB
V
IL
TO V
IH
V
OUT-
t
INRISE
V
CC
V
IN+
0V
V
CC
V
IN-
0V
t
OUTRISE
t
PLHX
V
CC
V
OUT+
0V
V
CC
V
OUT-
0V
t
PHLY
t
PLHY
50%
50%
50%
50%
10%
t
PHLX
90%
50%
50%
50%
50%
10%
t
INFALL
90%
90%
10%
t
OUTFALL
90%
10%
Figure 3. Output Signal Skew, Rise/Fall Time, Propagation Delay
_______________________________________________________________________________________
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
