MAX14585EVB [MAXIM]
Hi-Speed USB and Audio Switches with Negative Signal Capability and High-Voltage-Tolerable; 高速USB和音频开关，可处理负信号功能和高电压耐受
| 型号： | MAX14585EVB |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Hi-Speed USB and Audio Switches with Negative Signal Capability and High-Voltage-Tolerable |
| 文件： | 总12页 (文件大小：1600K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-5878; Rev 0; 5/11
E V A L U A T I O N K I T A V A I L A B L E
General Description
Benefits and Features
S Low Power Consumption
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-
Low Supply Current 7µA (typ)
ꢀSingle 2.7V to 5.5V Supply Operation, V
CC
S Flexible Design
capacitance (C ) and low on-resistance (R ) neces-
ON
ON
Dual Power-Supply Architecture, V and V
ꢀANO� Channel Override Control Input
B
CC
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.
S High Level of Integration for Performance
28V-Capable V Input with Automatic UNC�
B
BUS
Selection by V
Detection
ꢀLow-Capacitance Hi-Speed USB for Both
Channels (UNC� and ANO�)
ꢀDistortion-Free Negative Signal Throughput
Down to -1.8V on ANO� Channel
ꢀ3I (typ) On-Resistance
The devices feature a V
handle voltage up to 28V to automatically switch to the
detection input (V ) that can
B
BUS
USB signal path upon detection of a valid V
signal (V
BUS
B
B
> V
). In a dead battery situation, the voltage on V
VBDET
can supply power to the part if V is greater than 4.5V. The
ꢀ960MHz Bandwidth
B
MAX14585 features internal shunt resistors on the audio
path to reduce clicks and pops heard at the output.
ꢀ0.04% THD+N Audio Channel
ꢀ15kV Human Body Model (HBM) ESD on
COM1, COM2
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.
S Saves Board Space
Internal Shunt Resistor Reduces Clicks and
Pops (MAX14585)
Applications
10-Pin, 1.4mm x 1.8mm UTQFN Package
Ordering Information appears at end of data sheet.
Cell Phones
For related parts and recommended products to use with this part,
PDAs and Handheld Devices
Tablet PCs
refer to www.maxim-ic.com/MAX14585.related.
Typical Operating Circuit
3.0V
0.1µF
V
CC
MAX14585/MAX14585A
UNC1
V
CCINT
HI-SPEED
USB
TRANSCEIVER
COM1
COM2
UNC2
COMBINATION
USB AND AUDIO
CONNECTOR
AN01
AUDIO
AMPLIFIER
AN02
V
BUS
V
B
MAX14585
ONLY
V
VBDET
GND
AOR
����������������������������������������������������������������� 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
Detection
BUS
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND.)
, AOR................................................................-0.3V to +6V
Continuous Power Dissipation (T = +70NC)
A
V
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
CC
V ..........................................................................-0.3V to +30V
B
UNC_, ANO_, COM_ (V R2.7V)...-1.9V to min(V + 0.3V, 3.7V)
CC
CC
UNC_, COM_ (V R 4.5V, V
< 2.7V)................-0.3V to +3.7V
B
CC
UNC_, ANO_, COM_ (V < 2.7V)..-0.3V to min(V + 0.3V, 3.7V)
CC
CC
UNC_, ANO_, COM_ (V
= 0V, V = 0V).............-0.3V to +6V
CC
B
Continuous Current into Any Pin................................... Q100mA
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 ) .....143.2NC/W
JA
Junction-to-Case Thermal Resistance (B )............20.1NC/W
JC
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
A
(T = -40NC to +85NC, unless otherwise noted. Typical values are at V
= 3V, T = +25NC.) (Note 2)
A
CC
PARAMETER
POWER SUPPLY
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Power-Supply Range
V
2.7
5.5
14
V
CC
V
V
= 4.2V, 0V < V
< 0.4V,
CC
AOR
Supply Current
I
7
FA
SUPPLY
PSRR
R1.4V
AOR
f = 10kHz, V
R
= 3.0 Q0.3V,
CC
Power-Supply Rejection Ratio
100
dB
= 50I
COM_
V
V
V
Detect Threshold
V
V
V
V
rising, V
CC
R2.7V
R2.7V
3
3.3
0.2
3.6
40
V
V
B
B
B
VBDET
BUS
BUS
Detect Hysteresis
V
falling, V
CC
VBDET_H
Detect Leakage Current
= 5.5V
FA
B
ANALOG SWITCH
min(3.6V,
V
V
R2.7V for UNC_
0
UNC_
CC
V
)
CC
Analog-Signal Range
V
I
I
I
V
V
,
min(3.6V,
ANO_
V
V
R2.7V for ANO_, COM_
-1.8
CC
V
)
COM_
CC
= 3V, V
= -1.5V, +1.5V
CC
ANO_
ANO_ On-Resistance
UNC_ On-Resistance
R
3
3
6
ON(NO)
ON(NC)
I
= 10mA
COM_
V
= 3V, V
= 0V to V
,
CC
UNC_
CC
6
6
I
= 10mA
COM_
R
V
= 4.5V, V
= 0V to 5.5V, V
= 0V
B
CC
UNC_
3
to 2.5V, V
= 0V, I
= 10mA
AOR
COM_
ANO_ On-Resistance Match
Between Channels
V
= 3V, V
= 0V, I
= 10mA
CC
ANO_
COM_
DR
0.2
ON(NO)
(Note 3)
����������������������������������������������������������������� Maxim Integrated Products
2
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
Detection
BUS
ELECTRICAL CHARACTERISTICS (continued)
A
(T = -40NC to +85NC, unless otherwise noted. Typical values are at V
= 3V, T = +25NC.) (Note 2)
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
UNC_ On-Resistance Match
Between Channels
V
= 3V, V
= 0V, I = 10mA
COM_
CC
UNC_
DR
0.2
I
ON(NC)
FLAT(NO)
FLAT(NC)
(Note 3)
V
= 3V, I
= 10mA, V
= -1.5V
CC
COM_
ANO_
UNC_
ANO_ On-Resistance Flatness
UNC_ On-Resistance Flatness
R
R
0.04
0.2
0.2
I
I
to +1.5V (Note 4)
V
V
= 3V, I
= 10mA, V
= 0V to
CC
CC
COM_
0.04
700
(Note 4)
Shunt Switch Resistance
AOR Pulldown Resistor
R
I
= 2mA, V R2.7V
CC
1300
1200
I
SH
ANO_
R
250
kI
AOR
Switch open, V
= 2.5V, 0V
UNC_
UNC_ Off-Leakage Current
ANO_ Off-Leakage Current
COM_ Off-Leakage Current
I
-100
+100
+100
+800
nA
nA
FA
UNC_(OFF)
V
= -1.5V, 2.5V, V
= 3V
COM_
CC
MAX14585A, switch open, V
= 2.5V,
ANO_
I
-100
-10
ANO_(OFF)
0V, V
= 0V, 2.5V, V
= 3V
COM_
CC
V
V
= 0V, V
= 3.6V,
= unconnected
CC
COM_
I
COM_(OFF)
= V
UNC_
ANO_
V
= 3V, V
= 0V,
CC
ANO_
USB mode
2.5V, unconnected,
-200
-200
+200
+200
nA
nA
V
= 0V, 2.5V
COM_
COM_ On-Leakage Current
I
COM_(ON)
V
= 3V, V
= 0V,
CC
UNC_
Audio mode
2.5V, unconnected,
V
= -1.5V, 2.5V
COM_
V
= 3V, V
= 1.5V,
CC
ANO_
ANO_ to COM_, R = 50I; V
= 0V,
L
AOR
45
120
Fs
Figure 1
V = 0V to 5V or V = 5V,
B
B
V
= 0V to V
AOR
CC
Turn-On Time
t
ON
V
= 3V, V
= 1.5V,
= 0V,
AOR
CC
UNC_
UNC_ to COM_,
Figure 1
R = 50I; V
45
8
120
40
Fs
Fs
L
V
= 0V to 5V
B
ANO_ from
COM_,
V
= 3V, V
= 1.5V,
= 0V,
AOR
CC
ANO_
R = 50I; V
L
Figure 1
V = 0V to 5V
B
Turn-Off Time
t
OFF
V
= 3V, V
= 1.5V,
= 0V,
AOR
CC
UNC_
UNC_ from
COM_,
Figure 1
R = 50I; V
L
8
40
Fs
Fs
V = 0V to 5V or V = 5V,
B
B
V
= 0V to V
AOR
CC
R = 50I, time delay between one side of
the switch open and the other side closed
L
Break-Before-Make Time Delay
t
28
D
Output Skew (Same Switch)
Output Skew Between Switches
ANO_ Off-Capacitance
t
Figure 2
Figure 2
40
40
ps
ps
pF
pF
SK(P)
t
SK(O)
C
V
V
= 0.5V , DC bias = 0V, f = 1MHz
2.5
2.5
NO_(OFF)
NC_(OFF)
ANO_
UNC_
P-P
UNC_ Off-Capacitance
C
= 0.5V , DC bias = 0V, f = 1MHz
P-P
����������������������������������������������������������������� Maxim Integrated Products
3
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
Detection
BUS
ELECTRICAL CHARACTERISTICS (continued)
A
(T = -40NC to +85NC, unless otherwise noted. Typical values are at V
= 3V, T = +25NC.) (Note 2)
A
CC
PARAMETER
On-Capacitance
SYMBOL
CONDITIONS
= 0.5V , DC bias = 0V,
MIN
TYP
MAX
UNITS
V
COM_
P-P
C
6.7
pF
COM_(ON)
f = 240MHz, R = 50I
L
AC PERFORMANCE
ANO_ -3dB Bandwidth
UNC_ -3dB Bandwidth
BW
BW
R = R = 50I, V
= 0dBm, Figure 3
= 0dBm, Figure 3
960
960
MHz
MHz
NO
S
L
ANO_
UNC_
R = R = 50I, V
NC
S
L
f = 100kHz, V
Figure 3
= 1V
, R = 50I,
L
COM_
RMS
Off-Isolation
Crosstalk
-84
-86
dB
dB
%
f = 100kHz, V
= 1V
, R = 50I,
L
COM_
RMS
Figure 3 (Note 5)
Total Harmonic Distortion Plus
Noise
ANO_ to COM_, f = 20Hz to 20kHz,
THD+N
0.042
V
= 0.5V , DC bias = 0V, R = 600I
P-P L
COM_
LOGIC INPUT
AOR Input Logic-High
AOR Input Logic-Low
AOR Input Leakage Current
ESD PROTECTION
V
V
V
V
R2.7V
1.4
-22
V
V
IH
CC
V
R2.7V
0.4
IL
CC
I
= 0V or V , V R2.7V
CC CC
+22
FA
IN
AOR
Human Body Model
Q15
Q8
COM1, COM2
All Other Pins
IEC 61000-4-2 Air Gap Discharge
IEC 61000-4-2 Contact Discharge
Human Body Model
kV
kV
Q8
Q2
Note 2: All devices are 100% production tested at T = +25NC. Limits over the operating temperature range are guaranteed by
A
design; not production tested.
Note 3: DR
= ABS(R
- R
).
ON(MAX)
ON(CH1)
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.
t
t
< 5ns
< 5ns
R
V
IH
F
LOGIC
INPUT
50%
MAX14585
MAX14585A
V
IL
ANO_
COM_
V
IN_
V
OUT
t
OFF
OR UNC_
R
L
C
L
V
OUT
0.9 x V
0UT
CONTROL
0.1 x V
OUT
SWITCH
OUTPUT
0V
LOGIC
INPUT
t
ON
C INCLUDES FIXTURE AND STRAY CAPACITANCE.
L
R
L
CONTROL DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
V
OUT
= V
IN_
(
)
R + R
ON
L
Figure 1. Switching Time
����������������������������������������������������������������� Maxim Integrated Products
4
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
Detection
BUS
MAX14585
MAX14585A
UNC1 OR
ANO1
R
S
S
COM1
COM2
t
= t
PLH PLHX
OR t
OR t
- t
PLHY
PHLY
| OR |t
V
V
IN+
OUT+
t
t
t
= t
PHL PHLX
= |t
= |t
- t
|
SK(O)
SK(P)
PLHX PLHY PHLX PHLY
- t |
PLHX PHLX PLHY PHLY
R
L
L
- t
| OR |t
UNC2 OR
ANO2
R
CONTROL DEPENDS ON SWITCH CONFIGURATION.
V
V
IN-
OUT-
R
CONTROL
V
TO V
IH
IL
t
INFALL
t
INRISE
V
V
CC
90%
90%
V
IN+
50%
50%
50%
50%
10%
10%
0V
CC
V
IN-
0V
CC
t
t
OUTFALL
OUTRISE
t
t
PLHX
PHLX
V
V
90%
90%
V
OUT+
50%
50%
10%
10%
0V
CC
50%
50%
V
OUT-
0V
t
t
PHLY
PLHY
Figure 2. Output Skew
V
V
OUT
NETWORK
ANALYZER
OFF-ISOLATION = 20log
IN
50Ω
50Ω
V
V
IN
V
V
COM1
OUT
ON-LOSS = 20log
IN
MAX14585
MAX14585A
UNC1
V
V
OUT
MEAS
REF
CROSSTALK = 20log
OUT
IN
ANO1*
50Ω
50Ω
50Ω
*FOR CROSSTALK THIS PIN IS ANO2.
UNC2 AND COM2 ARE OPEN.
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.
Figure 3. On-Loss, Off-Isolation, and Crosstalk
����������������������������������������������������������������� Maxim Integrated Products
5
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
Detection
BUS
Typical Operating Characteristics
(V
= 3.0V, T = +25NC, unless otherwise noted.)
CC
A
UNC_ ON-RESISTANCE vs. COM_ VOLTAGE
ANO_ ON-RESISTANCE vs. COM_ VOLTAGE
UNC_ ON-RESISTANCE vs. COM_ VOLTAGE
3.3
3.2
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
4.0
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
I
= 10mA
I
= 10mA
UNC_
ANO_
V
= 2.7V
CC
3.1
3.0
2.9
2.8
2.7
2.6
2.5
T = +85°C
A
T = +25°C
A
V
= 2.7V
CC
V
= 5V
CC
T = -40°C
A
V
= 5V
CC
V
= 3V
CC
I
= 10mA
UNC_
0
1
2
3
4
-2
-1
0
1
2
3
4
0
0.5
1.0
1.5
2.0
2.5
3.0
V
(V)
V
(V)
V
(V)
COM_
COM_
COM_
COM_ ON-LEAKAGE CURRENT
vs. TEMPERATURE
COM_ OFF-LEAKAGE CURRENT
vs. TEMPERATURE
ANO_ ON-RESISTANCE vs. COM_ VOLTAGE
4.0
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
40
35
30
25
20
15
10
5
600
500
400
300
200
100
0
V
V
= 0V
V
= 2.5V
CC
COM_
= 3.6V
COM_
T = +25°C
A
T = +85°C
A
T = -40°C
A
V
= 3V
CC
I
= 10mA
ANO_
0
-2
-1
0
1
2
3
-40
-15
10
35
60
85
-40
-15
10
35
60
85
V
(V)
COM_
TEMPERATURE (°C)
TEMPERATURE (°C)
V
B
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SUPPLY CURRENT vs. SUPPLY VOLTAGE
V
B
DETECT THRESHOLD vs. TEMPERATURE
70
60
50
40
30
20
10
0
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
10
9
8
7
6
5
4
3
2
1
0
V
= 0V OR 3V
AOR
V RISING
B
T = +85°C
A
T = +25°C
A
V FALLING
B
T = -40°C
A
0
5
10
V
15
20
25
30
-40
-15
10
35
60
85
2.5
3.0
3.5
4.0
4.5
5.0
5.5
VOLTAGE (V)
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
B
����������������������������������������������������������������� Maxim Integrated Products
6
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
Detection
BUS
Typical Operating Characteristics (continued)
(V
= 3.0V, T = +25NC, unless otherwise noted.)
CC
A
TURN-OFF TIME vs. SUPPLY VOLTAGE
TURN-ON TIME vs. SUPPLY VOLTAGE
FREQUENCY RESPONSE
40
100
90
80
70
60
50
40
30
20
10
0
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
TOGGLE V
TOGGLE V
B
B
35
30
25
20
15
10
5
ON-LOSS
UNC_ TO COM_
ANO_ TO COM_
ANO_ FROM COM_
OFF-ISOLATION
UNC_ FROM COM_
CROSSTALK
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0.1
1
10
FREQUENCY (MHz)
100
1000
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
UNC_ EYE DIAGRAM
MAX14585/85A toc14
10
0.5
0.4
R = 600Ω
L
0.3
1
0.1
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0.01
0.001
10
100
1000
10,000
100,000
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
-9
FREQUENCY (Hz)
TIME ((x10 )s)
����������������������������������������������������������������� Maxim Integrated Products
7
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
Detection
BUS
Pin Configuration
TOP VIEW
COM2
7
COM1
6
AOR
8
9
5
4
3
V
CC
MAX14585
MAX14585A
V
GND
B
UNC2
10
ANO1
1
2
+
UNC1
ANO2
UTQFN
Pin Description
PIN
1
NAME
UNC1
ANO2
ANO1
GND
FUNCTION
USB Input 1. Normally closed terminal for switch 1.
Audio Input 2. Normally open terminal for switch 2.
Audio Input 1. Normally open terminal for switch 1.
Ground
2
3
4
Positive Supply-Voltage Input. Bypass V
device.
to GND with a 0.1FF capacitor as close as possible to the
CC
5
V
CC
6
7
COM1
COM2
Common Terminal for Switch 1
Common Terminal for Switch 2
Audio Override Input. Drive AOR low to have V control the switch. Drive AOR high to connect COM_
B
to ANO_. AOR has an internal pulldown resistor to GND.
8
AOR
9
V
V
Detection Input. If V RV
, COM_ connects to UNC_. Otherwise, COM_ connects to ANO_.
B
BUS
B
VBDET
10
UNC2
USB Input 2. Normally closed terminal for switch 2.
����������������������������������������������������������������� Maxim Integrated Products
8
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
Detection
BUS
Functional Diagrams/Truth Table
V
V
CC
CC
MAX14585
MAX14585A
V
V
CCINT
CCINT
UNC1
UNC2
UNC1
UNC2
COM1
COM2
COM1
COM2
ANO1
ANO2
ANO1
ANO2
V
V
B
B
V
V
VBDET
VBDET
GND
GND
AOR
AOR
MAX14585/MAX14585A
MAX14585
ANO_SHUNT
ON
V
B
AOR
UNC_
ON
ANO_
> V
< V
0
0
1
OFF
ON
ON
VBDET
OFF
OFF
OFF
VBDET
X
OFF
X = DON’T CARE
Analog-Signal Levels
Detailed Description
The devices are bidirectional, allowing ANO_, UNC_, and
COM_ to be configured as either inputs or outputs. Note
that UNC_ and ANO_ are only protected against ESD up
to Q2kV (HBM) and could require additional ESD protec-
tion if used as outputs. These devices feature a charge
pump that generates a negative supply to allow analog
The MAX14585/MAX14585A are high-ESD-protected
single DPDT switches that operate from a 2.7V to 5.5V
supply and are designed to multiplex Hi-Speed USB
signals and AC-coupled analog signals. These switches
combine the low on-capacitance (C ) and low on-resis-
ON
tance (R ) necessary for high-performance switching
signals as low as -1.8V to pass through ANO_ when V
ON
CC
applications. These devices meet the requirements for
USB low-speed and full-speed signaling. The negative
signal capability of the analog channel allows signals
below ground to pass through without distortion.
supply is greater than 2.7V. This allows AC-coupled sig-
nals that drop below ground to pass when operating from
a single power supply.
����������������������������������������������������������������� Maxim Integrated Products
9
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
Detection
BUS
When V
is below 2.7V and V is less than 4.5V, the
CC
B
Applications Information
switches accept signals from 0 to 3.6V but do not switch
according to the Functional Diagrams/Truth Table.
Extended ESD Protection
ESD protection structures are incorporated on all pins
to protect against electrostatic discharges up to Q2kV
(HBM) encountered during handling and assembly.
COM1 and COM2 are further protected against ESD up
to Q15kV (HBM) without damage. The ESD structures
withstand high ESD in both normal operation and
when the devices are powered down. After an ESD
event, the devices continue to function without latchup.
V
Detection Input
BUS
The devices feature a V
detection input (V ) that con-
B
BUS
B
nects COM_ to UNC_ when V exceeds the V
). For applications where V
present, drive the audio override input (AOR) high to con-
detection
is always
BUS
BUS
threshold (V
VBDET
nect ANO_ to COM_ (see the Functional Diagrams/Truth
Table). Drive AOR low to have V control the switch posi-
B
tion. Drive AOR rail-to-rail to minimize power consumption.
The V input is capable of handling voltage up to 28V
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents test
setup, test methodology, and test results.
B
for higher V
application. In the case where the main
BUS
power V
is lost due to an event such as a dead battery,
CC
V becomes the power supply if V is greater than 4.5V.
B
B
Click-and-Pop Suppression (MAX14585)
Human Body Model
Figure 4 shows the HBM. Figure 5 shows the current
waveform it generates when discharged into a low-
impedance state. This model consists of a 100pF capaci-
tor charged to the ESD voltage of interest that is then
discharged into the device through a 1.5kI resistor.
The switched 700I(typ) shunt resistors on the MAX14585
automatically discharge any capacitance at the ANO_
terminals when they are unconnected from COM_. This
reduces audio click-and-pop sounds that can occur
when switching between USB and audio sources.
R
R
C
D
1500Ω
1MΩ
I 100%
P
90%
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
I
r
DISCHARGE
RESISTANCE
CHARGE-CURRENT-
LIMIT RESISTOR
AMPERES
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
36.8%
C
100pF
STORAGE
CAPACITOR
s
10%
0
SOURCE
TIME
0
t
RL
t
DL
CURRENT WAVEFORM
Figure 4. Human Body ESD Test Model
Figure 5. Human Body Current Waveform
���������������������������������������������������������������� Maxim Integrated Products 10
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
Detection
BUS
IEC 61000-4-2
R
R
D
C
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment. It does not spe-
cifically refer to integrated circuits. The major difference
between tests done using the HBM and IEC 61000-4-2
is higher peak current in IEC 61000-4-2, because series
resistance is lower in the IEC 61000-4-2 model. Hence,
the ESD withstand voltage measured to IEC 61000-4-2
is generally lower than that measured using the HBM.
Figure 6 shows the IEC 61000-4-2 model and Figure 7
shows the current waveform for the Q8kV, IEC 61000-4-2,
Level 4, ESD Contact-Discharge Method.
50MΩ TO 100MΩ
330Ω
DISCHARGE
RESISTANCE
CHARGE CURRENT
LIMIT RESISTOR
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
C
s
150pF
STORAGE
CAPACITOR
SOURCE
Layout
Hi-Speed USB requires careful PCB layout with 45I
single-ended/90I differential controlled-impedance
matched traces of equal lengths. Ensure that bypass
capacitors are as close to the device as possible. Use
large ground planes where possible.
Figure 6. IEC 61000-4-2 ESD Test Model
I
100%
90%
Ordering Information/
Selector Guide
TOP
MARK
SHUNT
RESISTOR PACKAGE
PIN-
PART
10%
t = 0.7ns to 1ns
MAX14585EVB+T
MAX14585AEVB+T
AAY
AAZ
Yes
No
10 UTQFN
10 UTQFN
r
t
30ns
Note: All devices are specified over the -40°C to +85°C tem-
perature range.
60ns
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Figure 7. IEC 61000-4-2 ESD Generator Current Waveform
Chip Information
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PROCESS: BiCMOS
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
10 UTQFN
V101A1CN+1
21-0028
90-0287
���������������������������������������������������������������� Maxim Integrated Products 11
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable V
Detection
BUS
Revision History
REVISION REVISION
DESCRIPTION
PAGES
CHANGED
NUMBER
DATE
0
5/11
Initial release
—
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
12
©
2011 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
相关型号：
MAX14585EVBT
Hi-Speed USB and Audio Switches with Negative Signal Capability and High-Voltage-Tolerable
MAXIM
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