19-5878; Rev 0; 5/11
EVALUATION KIT AVAILABLE
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
BUS
Detection
General Description
The MAX14585/MAX14585A high-ESD-protected double-
pole/double-throw (DPDT) switches multiplex Hi-Speed
(480Mbps) USB and analog signals such as AC-coupled
audio or video. These devices combine the low on-
capacitance (C
ON
) and low on-resistance (R
ON
) neces-
sary for high-performance switching applications in por-
table electronics and include an internal negative supply
to pass audio signals that swing below ground down to
-1.8V. The devices also handle USB low-/full-speed sig-
naling and operate from a 2.7V to 5.5V supply.
The devices feature a V
BUS
detection input (V
B
) that can
handle voltage up to 28V to automatically switch to the
USB signal path upon detection of a valid V
BUS
signal (V
B
> V
VBDET
). In a dead battery situation, the voltage on V
B
can supply power to the part if V
B
is greater than 4.5V. The
MAX14585 features internal shunt resistors on the audio
path to reduce clicks and pops heard at the output.
The MAX14585/MAX14585A are available in a space-
saving, 10-pin, 1.4mm x 1.8mm UTQFN package and
operate over the -40NC to +85NC temperature range.
Benefits and Features
S
Low Power Consumption
Low Supply Current 7µA (typ)
Single 2.7V to 5.5V Supply Operation, V
CC
S
Flexible Design
Dual Power-Supply Architecture, V
B
and V
CC
ANO½ Channel Override Control Input
S
High Level of Integration for Performance
28V-Capable V
B
Input with Automatic UNC½
Selection by V
BUS
Detection
Low-Capacitance Hi-Speed USB for Both
Channels (UNC½ and ANO½)
Distortion-Free Negative Signal Throughput
Down to -1.8V on ANO½ Channel
(typ) On-Resistance
3I
960MHz Bandwidth
0.04% THD+N Audio Channel
±15kV Human Body Model (HBM) ESD on
COM1, COM2
S
Saves Board Space
Internal Shunt Resistor Reduces Clicks and
Pops (MAX14585)
10-Pin, 1.4mm x 1.8mm UTQFN Package
Ordering Information
appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to
www.maxim-ic.com/MAX14585.related.
Applications
Cell Phones
PDAs and Handheld Devices
Tablet PCs
Typical Operating Circuit
3.0V 0.1µF
V
CC
HI-SPEED
USB
TRANSCEIVER
UNC1
UNC2
MAX14585/MAX14585A
V
CCINT
COM1
COMBINATION
USB AND AUDIO
CONNECTOR
COM2
AUDIO
AMPLIFIER
AN01
AN02
V
BUS
V
B
MAX14585
ONLY
V
VBDET
GND
AOR
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
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.
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
BUS
Detection
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND.)
V
CC
, AOR ................................................................-0.3V to +6V
V
B
..........................................................................-0.3V to +30V
UNC_, ANO_, COM_ (V
CC
R
2.7V) ... -1.9V to min(V
CC
+ 0.3V, 3.7V)
UNC_, COM_ (V
B
R
4.5V, V
CC
< 2.7V) ................-0.3V to +3.7V
UNC_, ANO_, COM_ (V
CC
< 2.7V).. -0.3V to min(V
CC
+ 0.3V, 3.7V)
UNC_, ANO_, COM_ (V
CC
= 0V, V
B
= 0V) .............-0.3V to +6V
Continuous Current into Any Pin ...................................
Q100mA
Continuous Power Dissipation (T
A
= +70NC)
UTQFN (derate 7mW/NC above +70NC) ......................559mW
Operating Temperature Range .......................... -40NC to +85NC
Junction Temperature Range........................... -40NC to +150NC
Storage Temperature Range............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
UTQFN
Junction-to-Ambient Thermal Resistance (B
JA
) .....143.2NC/W
Junction-to-Case Thermal Resistance (B
JC
) ............20.1NC/W
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.
ELECTRICAL CHARACTERISTICS
(T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at V
CC
= 3V, T
A
= +25NC.) (Note 2)
PARAMETER
POWER SUPPLY
Power-Supply Range
Supply Current
Power-Supply Rejection Ratio
V
B
Detect Threshold
V
B
Detect Hysteresis
V
B
Detect Leakage Current
ANALOG SWITCH
V
UNC_
Analog-Signal Range
V
ANO_
,
V
COM_
R
ON(NO)
V
CC
R
2.7V for UNC_
V
CC
R
2.7V for ANO_, COM_
V
CC
= 3V, V
ANO_
= -1.5V, +1.5V
I
COM_
= 10mA
V
CC
= 3V, V
UNC_
= 0V to V
CC
,
I
COM_
= 10mA
V
B
= 4.5V, V
CC
= 0V to 5.5V, V
UNC_
= 0V
to 2.5V, V
AOR
= 0V, I
COM_
= 10mA
V
CC
= 3V, V
ANO_
= 0V, I
COM_
= 10mA
(Note 3)
0
-1.8
3
3
3
0.2
min(3.6V,
V
CC
)
min(3.6V,
V
CC
)
6
6
I
6
I
V
CC
I
SUPPLY
PSRR
V
VBDET
V
VBDET_H
V
CC
= 4.2V, 0V < V
AOR
< 0.4V,
V
AOR
R
1.4V
f = 10kHz, V
CC
= 3.0
Q
0.3V,
R
COM_
= 50I
V
BUS
rising, V
CC
R
2.7V
V
BUS
falling, V
CC
R
2.7V
V
B
= 5.5V
3
2.7
7
100
3.3
0.2
40
3.6
5.5
14
V
FA
dB
V
V
FA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
ANO_ On-Resistance
I
UNC_ On-Resistance
R
ON(NC)
ANO_ On-Resistance Match
Between Channels
DR
ON(NO)
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
Maxim Integrated Products
2
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
BUS
Detection
ELECTRICAL CHARACTERISTICS (continued)
(T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at V
CC
= 3V, T
A
= +25NC.) (Note 2)
PARAMETER
UNC_ On-Resistance Match
Between Channels
ANO_ On-Resistance Flatness
UNC_ On-Resistance Flatness
Shunt Switch Resistance
AOR Pulldown Resistor
UNC_ Off-Leakage Current
ANO_ Off-Leakage Current
COM_ Off-Leakage Current
SYMBOL
DR
ON(NC)
R
FLAT(NO)
R
FLAT(NC)
R
SH
R
AOR
I
UNC_(OFF)
I
ANO_(OFF)
I
COM_(OFF)
Switch open, V
UNC_
= 2.5V, 0V
V
COM_
= -1.5V, 2.5V, V
CC
= 3V
MAX14585A, switch open, V
ANO_
= 2.5V,
0V, V
COM_
= 0V, 2.5V, V
CC
= 3V
V
CC
= 0V, V
COM_
= 3.6V,
V
UNC_
= V
ANO_
= unconnected
USB mode
COM_ On-Leakage Current
I
COM_(ON)
Audio mode
V
CC
= 3V, V
ANO_
= 0V,
2.5V, unconnected,
V
COM_
= 0V, 2.5V
V
CC
= 3V, V
UNC_
= 0V,
2.5V, unconnected,
V
COM_
= -1.5V, 2.5V
V
CC
= 3V, V
ANO_
= 1.5V,
R
L
= 50I; V
AOR
= 0V,
V
B
= 0V to 5V or V
B
= 5V,
V
AOR
= 0V to V
CC
V
CC
= 3V, V
UNC_
= 1.5V,
R
L
= 50I; V
AOR
= 0V,
V
B
= 0V to 5V
V
CC
= 3V, V
ANO_
= 1.5V,
R
L
= 50I; V
AOR
= 0V,
V
B
= 0V to 5V
V
CC
= 3V, V
UNC_
= 1.5V,
R
L
= 50I; V
AOR
= 0V,
V
B
= 0V to 5V or V
B
= 5V,
V
AOR
= 0V to V
CC
CONDITIONS
V
CC
= 3V, V
UNC_
= 0V, I
COM_
= 10mA
(Note 3)
V
CC
= 3V, I
COM_
= 10mA, V
ANO_
= -1.5V
to +1.5V (Note 4)
V
CC
= 3V, I
COM_
= 10mA, V
UNC_
= 0V to
V
CC
(Note 4)
I
ANO_
= 2mA, V
CC
R
2.7V
250
-100
-100
-10
MIN
TYP
0.2
0.04
0.04
700
0.2
0.2
1300
1200
+100
+100
+800
MAX
UNITS
I
I
I
I
kI
nA
nA
FA
-200
+200
nA
-200
+200
nA
ANO_ to COM_,
Figure 1
Turn-On Time
t
ON
UNC_ to COM_,
Figure 1
ANO_ from
COM_,
Figure 1
Turn-Off Time
t
OFF
UNC_ from
COM_,
Figure 1
45
120
Fs
45
120
Fs
8
40
Fs
8
40
Fs
Break-Before-Make Time Delay
Output Skew (Same Switch)
Output Skew Between Switches
ANO_ Off-Capacitance
UNC_ Off-Capacitance
t
D
t
SK(P)
t
SK(O)
C
NO_(OFF)
C
NC_(OFF)
R
L
= 50I, time delay between one side of
the switch open and the other side closed
Figure 2
Figure 2
V
ANO_
= 0.5V
P-P
, DC bias = 0V, f = 1MHz
V
UNC_
= 0.5V
P-P
, DC bias = 0V, f = 1MHz
28
40
40
2.5
2.5
Fs
ps
ps
pF
pF
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
Maxim Integrated Products
3
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
BUS
Detection
ELECTRICAL CHARACTERISTICS (continued)
(T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at V
CC
= 3V, T
A
= +25NC.) (Note 2)
PARAMETER
On-Capacitance
AC PERFORMANCE
ANO_ -3dB Bandwidth
UNC_ -3dB Bandwidth
Off-Isolation
Crosstalk
Total Harmonic Distortion Plus
Noise
LOGIC INPUT
AOR Input Logic-High
AOR Input Logic-Low
AOR Input Leakage Current
ESD PROTECTION
Human Body Model
COM1, COM2
All Other Pins
IEC 61000-4-2 Air Gap Discharge
IEC 61000-4-2 Contact Discharge
Human Body Model
Q15
Q8
Q8
Q2
kV
kV
V
IH
V
IL
I
IN
V
CC
R
2.7V
V
CC
R
2.7V
V
AOR
= 0V or V
CC
, V
CC
R
2.7V
-22
1.4
0.4
+22
V
V
FA
THD+N
BW
NO
BW
NC
R
S
= R
L
= 50I, V
ANO_
= 0dBm, Figure 3
R
S
= R
L
= 50I, V
UNC_
= 0dBm, Figure 3
f = 100kHz, V
COM_
= 1V
RMS
, R
L
= 50I,
Figure 3
f = 100kHz, V
COM_
= 1V
RMS
, R
L
= 50I,
Figure 3 (Note 5)
ANO_ to COM_, f = 20Hz to 20kHz,
V
COM_
= 0.5V
P-P
, DC bias = 0V, R
L
= 600I
960
960
-84
-86
0.042
MHz
MHz
dB
dB
%
SYMBOL
C
COM_(ON)
CONDITIONS
V
COM_
= 0.5V
P-P
, DC bias = 0V,
f = 240MHz, R
L
= 50I
MIN
TYP
6.7
MAX
UNITS
pF
Note 2:
All devices are 100% production tested at T
A
= +25NC. Limits over the operating temperature range are guaranteed by
design; not production tested.
Note 3:
DR
ON(MAX)
= ABS(R
ON(CH1)
- R
ON(CH2)
).
Note 4:
Flatness is defined as the difference between the maximum and minimum value of on-resistance, as measured over speci-
fied analog-signal ranges.
Note 5:
Between two switches.
MAX14585
MAX14585A
V
IN_
ANO_
OR UNC_
CONTROL
LOGIC
INPUT
COM_
R
L
V
OUT
C
L
LOGIC
INPUT
V
IH
V
IL
50%
t
R
< 5ns
t
F
< 5ns
t
OFF
V
OUT
SWITCH
OUTPUT
0V
t
ON
CONTROL DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
0.9 x V
0UT
0.1 x V
OUT
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
R
L
V
OUT
= V
IN_
R
L
+ R
ON
(
)
Figure 1. Switching Time
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
Maxim Integrated Products
4
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
BUS
Detection
R
S
UNC1 OR
ANO1
MAX14585
MAX14585A
COM1
R
L
V
IN-
R
S
UNC2 OR
ANO2
COM2
R
L
CONTROL
V
IL
TO V
IH
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%
10%
t
PHLX
90%
90%
t
OUTFALL
50%
50%
50%
50%
10%
10%
t
INFALL
V
OUT-
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
|
CONTROL DEPENDS ON SWITCH CONFIGURATION.
V
IN+
90%
90%
Figure 2. Output Skew
NETWORK
ANALYZER
OFF-ISOLATION = 20log
50
Ω
V
OUT
V
IN
COM1
UNC1
50
Ω
MAX14585
MAX14585A
ANO1*
V
IN
50
Ω
V
ON-LOSS = 20log
OUT
V
IN
MEAS
50
Ω
REF
50
Ω
V
CROSSTALK = 20log
OUT
V
IN
V
OUT
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" ANO_ OR UNC_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND "ON" ANO_ OR UNC_ TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.
*FOR CROSSTALK THIS PIN IS ANO2.
UNC2 AND COM2 ARE OPEN.
Figure 3. On-Loss, Off-Isolation, and Crosstalk
½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½½
Maxim Integrated Products
5
51单片机
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
