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 VBUS Detection
General Description
Benefits and Features
S Low Power Consumption
Low Supply Current 7µA (typ)
Single 2.7V to 5.5V Supply Operation, VCC
The MAX14585/MAX14585A high-ESD-protected doublepole/double-throw (DPDT) switches multiplex Hi-Speed
(480Mbps) USB and analog signals such as AC-coupled
audio or video. These devices combine the low oncapacitance (CON) and low on-resistance (RON) necessary for high-performance switching applications in portable 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 signaling and operate from a 2.7V to 5.5V supply.
S Flexible Design
Dual Power-Supply Architecture, VB and VCC
ANO_ Channel Override Control Input
S High Level of Integration for Performance
28V-Capable VB Input with Automatic UNC_
Selection by VBUS 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
960MHz Bandwidth
0.04% THD+N Audio Channel
±15kV Human Body Model (HBM) ESD on
COM1, COM2
The devices feature a VBUS detection input (VB) that can
handle voltage up to 28V to automatically switch to the
USB signal path upon detection of a valid VBUS signal (VB
> VVBDET). In a dead battery situation, the voltage on VB
can supply power to the part if VB 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 spacesaving, 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)
10-Pin, 1.4mm x 1.8mm UTQFN Package
Applications
Ordering Information appears at end of data sheet.
Cell Phones
For related parts and recommended products to use with this part,
refer to www.maxim-ic.com/MAX14585.related.
PDAs and Handheld Devices
Tablet PCs
Typical Operating Circuit
3.0V 0.1µF
VCC
HI-SPEED
USB
TRANSCEIVER
UNC1
MAX14585/MAX14585A
VCCINT
COM1
UNC2
COM2
AUDIO
AMPLIFIER
AN01
COMBINATION
USB AND AUDIO
CONNECTOR
AN02
VBUS
VB
MAX14585
ONLY
GND
VVBDET
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 VBUS Detection
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND.)
VCC, AOR.................................................................-0.3V to +6V
VB...........................................................................-0.3V to +30V
UNC_, ANO_, COM_ (VCC R 2.7V).... -1.9V to min(VCC + 0.3V, 3.7V)
UNC_, COM_ (VB R 4.5V, VCC < 2.7V).................-0.3V to +3.7V
UNC_, ANO_, COM_ (VCC < 2.7V)... -0.3V to min(VCC + 0.3V, 3.7V)
UNC_, ANO_, COM_ (VCC = 0V, VB = 0V)..............-0.3V to +6V
Continuous Current into Any Pin.................................... Q100mA
Continuous Power Dissipation (TA = +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 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.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
UTQFN
Junction-to-Ambient Thermal Resistance (BJA)......143.2NC/W
Junction-to-Case Thermal Resistance (BJC).............20.1NC/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
ELECTRICAL CHARACTERISTICS
(TA = -40NC to +85NC, unless otherwise noted. Typical values are at VCC = 3V, TA = +25NC.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
V
14
FA
POWER SUPPLY
Power-Supply Range
Supply Current
VCC
ISUPPLY
Power-Supply Rejection Ratio
PSRR
2.7
VCC = 4.2V, 0V < VAOR < 0.4V,
VAOR R 1.4V
f = 10kHz, VCC = 3.0 Q 0.3V,
RCOM_= 50I
VB Detect Threshold
VVBDET
VBUS rising, VCC R 2.7V
VB Detect Hysteresis
VVBDET_H
VBUS falling, VCC R 2.7V
VB Detect Leakage Current
7
100
3
3.3
dB
3.6
0.2
VB = 5.5V
V
V
40
FA
ANALOG SWITCH
Analog-Signal Range
ANO_ On-Resistance
UNC_ On-Resistance
ANO_ On-Resistance Match
Between Channels
VUNC_
VCC R 2.7V for UNC_
VANO_,
VCOM_
VCC R 2.7V for ANO_, COM_
RON(NO)
RON(NC)
DRON(NO)
0
min(3.6V,
VCC)
-1.8
min(3.6V,
VCC)
VCC = 3V, VANO_= -1.5V, +1.5V
ICOM_ = 10mA
3
6
VCC = 3V, VUNC_= 0V to VCC,
ICOM_ = 10mA
3
6
VB = 4.5V, VCC = 0V to 5.5V, VUNC_ = 0V
to 2.5V, VAOR = 0V, ICOM_ = 10mA
3
6
VCC = 3V, VANO_ = 0V, ICOM_ = 10mA
(Note 3)
V
I
I
0.2
I
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MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable VBUS Detection
ELECTRICAL CHARACTERISTICS (continued)
(TA = -40NC to +85NC, unless otherwise noted. Typical values are at VCC = 3V, TA = +25NC.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
UNC_ On-Resistance Match
Between Channels
DRON(NC)
VCC = 3V, VUNC_ = 0V, ICOM_= 10mA
(Note 3)
0.2
ANO_ On-Resistance Flatness
RFLAT(NO)
VCC = 3V, ICOM_ = 10mA, VANO_ = -1.5V
to +1.5V (Note 4)
0.04
0.2
I
UNC_ On-Resistance Flatness
RFLAT(NC)
VCC = 3V, ICOM_ = 10mA, VUNC_= 0V to
VCC (Note 4)
0.04
0.2
I
Shunt Switch Resistance
AOR Pulldown Resistor
RSH
1300
I
250
700
1200
kI
IANO_ = 2mA, VCC R 2.7V
RAOR
I
UNC_ Off-Leakage Current
IUNC_(OFF)
Switch open, VUNC_ = 2.5V, 0V
VCOM_ = -1.5V, 2.5V, VCC = 3V
-100
+100
nA
ANO_ Off-Leakage Current
IANO_(OFF)
MAX14585A, switch open, VANO_ = 2.5V,
0V, VCOM_ = 0V, 2.5V, VCC = 3V
-100
+100
nA
COM_ Off-Leakage Current
ICOM_(OFF)
VCC = 0V, VCOM_ = 3.6V,
VUNC_ = VANO_ = unconnected
-10
+800
FA
COM_ On-Leakage Current
Turn-On Time
USB mode
VCC = 3V, VANO_ = 0V,
2.5V, unconnected,
VCOM_ = 0V, 2.5V
-200
+200
nA
Audio mode
VCC = 3V, VUNC_ = 0V,
2.5V, unconnected,
VCOM_ = -1.5V, 2.5V
-200
+200
nA
ANO_ to COM_,
Figure 1
VCC = 3V, VANO_ = 1.5V,
RL = 50I; VAOR = 0V,
VB = 0V to 5V or VB = 5V,
VAOR = 0V to VCC
45
120
Fs
UNC_ to COM_,
Figure 1
VCC = 3V, VUNC_ = 1.5V,
RL = 50I; VAOR = 0V,
VB = 0V to 5V
45
120
Fs
ANO_ from
COM_,
Figure 1
VCC = 3V, VANO_ = 1.5V,
RL = 50I; VAOR = 0V,
VB = 0V to 5V
8
40
Fs
UNC_ from
COM_,
Figure 1
VCC = 3V, VUNC_ = 1.5V,
RL = 50I; VAOR = 0V,
VB = 0V to 5V or VB = 5V,
VAOR = 0V to VCC
8
40
Fs
RL = 50I, time delay between one side of
the switch open and the other side closed
28
Fs
ICOM_(ON)
tON
Turn-Off Time
tOFF
Break-Before-Make Time Delay
tD
Output Skew (Same Switch)
tSK(P)
Figure 2
40
ps
Output Skew Between Switches
tSK(O)
Figure 2
40
ps
ANO_ Off-Capacitance
CNO_(OFF)
VANO_ = 0.5VP-P, DC bias = 0V, f = 1MHz
2.5
pF
UNC_ Off-Capacitance
CNC_(OFF)
VUNC_ = 0.5VP-P, DC bias = 0V, f = 1MHz
2.5
pF
����������������������������������������������������������������� Maxim Integrated Products 3
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable VBUS Detection
ELECTRICAL CHARACTERISTICS (continued)
(TA = -40NC to +85NC, unless otherwise noted. Typical values are at VCC = 3V, TA = +25NC.) (Note 2)
PARAMETER
SYMBOL
On-Capacitance
CCOM_(ON)
CONDITIONS
MIN
TYP
MAX
UNITS
VCOM_ = 0.5VP-P, DC bias = 0V,
f = 240MHz, RL = 50I
6.7
pF
AC PERFORMANCE
ANO_ -3dB Bandwidth
BWNO
RS = RL = 50I, VANO_ = 0dBm, Figure 3
960
MHz
UNC_ -3dB Bandwidth
BWNC
RS = RL = 50I, VUNC_ = 0dBm, Figure 3
960
MHz
Off-Isolation
f = 100kHz, VCOM_ = 1VRMS, RL = 50I,
Figure 3
-84
dB
Crosstalk
f = 100kHz, VCOM_ = 1VRMS, RL = 50I,
Figure 3 (Note 5)
-86
dB
0.042
%
Total Harmonic Distortion Plus
Noise
THD+N
ANO_ to COM_, f = 20Hz to 20kHz,
VCOM_ = 0.5VP-P, DC bias = 0V, RL = 600I
LOGIC INPUT
AOR Input Logic-High
VIH
VCC R 2.7V
1.4
AOR Input Logic-Low
VIL
VCC R 2.7V
AOR Input Leakage Current
IIN
VAOR = 0V or VCC, VCC R 2.7V
V
-22
0.4
V
+22
FA
ESD PROTECTION
COM1, COM2
All Other Pins
Human Body Model
Q15
IEC 61000-4-2 Air Gap Discharge
Q8
IEC 61000-4-2 Contact Discharge
Q8
Human Body Model
Q2
kV
kV
Note 2: All devices are 100% production tested at TA = +25NC. Limits over the operating temperature range are guaranteed by
design; not production tested.
Note 3: DRON(MAX) = ABS(RON(CH1) - RON(CH2)).
Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance, as measured over specified analog-signal ranges.
Note 5: Between two switches.
LOGIC
INPUT
MAX14585
MAX14585A
VIN_
COM_
ANO_
OR UNC_
RL
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
RL
VOUT = VIN_
RL + RON
)
50%
t OFF
CL
VOUT
SWITCH
OUTPUT
(
VIL
VOUT
CONTROL
LOGIC
INPUT
tR < 5ns
tF < 5ns
VIH
0V
0.9 x V0UT
0.1 x VOUT
t ON
CONTROL DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 1. Switching Time
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MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable VBUS Detection
RS
VIN+
MAX14585
MAX14585A
UNC1 OR
ANO1
COM1
tPLH = tPLHX OR tPLHY
VOUT+
tPHL = tPHLX OR tPHLY
tSK(O) = |tPLHX - tPLHY| OR |tPHLX - tPHLY|
tSK(P) = |tPLHX - tPHLX| OR |tPLHY - tPHLY|
RL
RS
VIN-
UNC2 OR
ANO2
COM2
CONTROL DEPENDS ON SWITCH CONFIGURATION.
VOUTRL
CONTROL
VIL TO VIH
tINFALL
tINRISE
VCC
90%
VIN+
90%
50%
50%
10%
0V
10%
VCC
VIN-
50%
50%
0V
tOUTRISE
tPLHX
tOUTFALL
tPHLX
VCC
90%
VOUT+
90%
50%
50%
10%
0V
10%
VCC
50%
VOUT-
50%
0V
tPHLY
tPLHY
Figure 2. Output Skew
COM1
UNC1
50Ω
MAX14585
MAX14585A
ANO1*
50Ω
VIN
VOUT
NETWORK
ANALYZER
OFF-ISOLATION = 20log
50Ω
VOUT
VIN
V
ON-LOSS = 20log OUT
VIN
MEAS
50Ω
REF
V
CROSSTALK = 20log OUT
VIN
50Ω
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
����������������������������������������������������������������� Maxim Integrated Products 5
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable VBUS Detection
Typical Operating Characteristics
(VCC = 3.0V, TA = +25NC, unless otherwise noted.)
2.9
VCC = 5V
2.8
3.0
VCC = 2.7V
2.9
2.8
2.7
2.7
2.6
2.6
2.5
2
3
4
VCC = 5V
TA = +25°C
3.2
3.0
TA = -40°C
2.8
2.6
2.4
VCC = 3V
IUNC_ = 10mA
2.2
2.0
-1
-2
0
MAX14585/85A toc03
TA = +85°C
3.4
1
2
3
4
0.5
0
1.0
1.5
2.0
2.5
VCOM_ (V)
ANO_ ON-RESISTANCE vs. COM_ VOLTAGE
COM_ ON-LEAKAGE CURRENT
vs. TEMPERATURE
COM_ OFF-LEAKAGE CURRENT
vs. TEMPERATURE
TA = +25°C
TA = +85°C
3.2
3.0
2.8
TA = -40°C
2.6
2.4
VCC = 3V
IANO_ = 10mA
2.2
2.0
-2
-1
0
1
2
30
25
20
15
10
0
3
-15
10
35
60
TA = +85°C
6
TA = +25°C
TA = -40°C
3
VAOR = 0V OR 3V
-15
50
40
30
20
2
4.5
SUPPLY VOLTAGE (V)
5.0
5.5
60
85
VB DETECT THRESHOLD vs. TEMPERATURE
VB RISING
3.4
3.3
3.2
3.1
3.0
VB FALLING
2.9
2.8
2.6
0
0
35
2.7
10
1
10
3.5
VB THRESHOLD (V)
7
4.0
-40
TEMPERATURE (°C)
60
VB CURRENT (µA)
8
3.5
200
85
VB SUPPLY CURRENT vs. SUPPLY VOLTAGE
70
MAX14585/85A toc07
9
3.0
300
0
-40
SUPPLY CURRENT vs. SUPPLY VOLTAGE
2.5
400
TEMPERATURE (°C)
10
4
500
VCC = 0V
VCOM_ = 3.6V
100
5
VCOM_ (V)
5
600
MAX14585/85A toc09
3.4
VCOM_ = 2.5V
35
OFF-LEAKAGE CURRENT (µA)
3.6
40
ON-LEAKAGE CURRENT (nA)
MAX14585/85A toc04
3.8
3.0
MAX14585/85A toc06
VCOM_ (V)
MAX14585/85A toc05
VCOM_ (V)
4.0
SUPPLY CURRENT (µA)
3.6
2.5
1
0
ON-RESISTANCE (Ω)
3.1
3.8
ON-RESISTANCE (Ω)
3.0
IANO_ = 10mA
3.2
UNC_ ON-RESISTANCE vs. COM_ VOLTAGE
4.0
MAX14585/85A toc08
ON-RESISTANCE (Ω)
3.1
MAX14585/85A toc02
VCC = 2.7V
3.2
ANO_ ON-RESISTANCE vs. COM_ VOLTAGE
3.3
ON-RESISTANCE (Ω)
IUNC_ = 10mA
MAX14585/85A toc01
UNC_ ON-RESISTANCE vs. COM_ VOLTAGE
3.3
0
5
10
15
20
VB VOLTAGE (V)
25
30
2.5
-40
-15
10
35
60
85
TEMPERATURE (°C)
����������������������������������������������������������������� Maxim Integrated Products 6
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable VBUS Detection
Typical Operating Characteristics (continued)
(VCC = 3.0V, TA = +25NC, unless otherwise noted.)
20
UNC_ FROM COM_
15
10
UNC_ TO COM_
60
50
40
30
-10
-30
-40
-50
10
-90
0
0
-100
3.5
4.0
4.5
5.0
5.5
2.5
3.0
SUPPLY VOLTAGE (V)
3.5
4.0
4.5
5.5
1
0.1
0.1
0.01
10
100
1000
FREQUENCY (MHz)
UNC_ EYE DIAGRAM
MAX14585/85A toc14
0.5
0.4
DIFFERENTIAL SIGNAL (V)
MAX14585/85A toc13
RL = 600Ω
1
THD+N (%)
5.0
SUPPLY VOLTAGE (V)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
10
CROSSTALK
-80
20
3.0
OFF-ISOLATION
-60
5
2.5
ON-LOSS
-20
-70
ANO_ TO COM_
MAX14585/85A toc12
80
70
0
MAGNITUDE (dB)
ANO_ FROM COM_
25
TOGGLE VB
90
TURN-ON TIME (µs)
30
TURN-ON TIME (µs)
MAX14585/85A toc10
TOGGLE VB
35
FREQUENCY RESPONSE
TURN-ON TIME vs. SUPPLY VOLTAGE
100
MAX14585/85A toc11
TURN-OFF TIME vs. SUPPLY VOLTAGE
40
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0.001
10
100
1000
FREQUENCY (Hz)
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
TIME ((x10-9)s)
����������������������������������������������������������������� Maxim Integrated Products 7
MAX14585/MAX14585A
Hi-Speed USB and Audio Switches with Negative Signal
Capability and High-Voltage-Tolerable VBUS Detection
Pin Configuration
TOP VIEW
AOR
8
VB
9
UNC2
10
+
COM2
COM1
7
6
MAX14585
MAX14585A
1
2
UNC1
ANO2
5
VCC
4
GND
3
ANO1
UTQFN
Pin Description
PIN
NAME
FUNCTION
1
UNC1
USB Input 1. Normally closed terminal for switch 1.
2
ANO2
Audio Input 2. Normally open terminal for switch 2.
3
ANO1
Audio Input 1. Normally open terminal for switch 1.
4
GND
Ground
5
VCC
Positive Supply-Voltage Input. Bypass VCC to GND with a 0.1FF capacitor as close as possible to the
device.
6
COM1
Common Terminal for Switch 1
7
COM2
Common Terminal for Switch 2
8
AOR
Audio Override Input. Drive AOR low to have VB control the switch. Drive AOR high to connect COM_
to ANO_. AOR has an internal pulldown resistor to GND.
9
VB
VBUS Detection Input. If VB R VVBDET, COM_ connects to UNC_. Otherwise, COM_ connects to ANO_.
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 VBUS Detection
Functional Diagrams/Truth Table
VCC
VCC
MAX14585
MAX14585A
VCCINT
UNC1
VCCINT
UNC1
COM1
COM1
UNC2
UNC2
COM2
COM2
ANO1
ANO1
ANO2
ANO2
VB
VB
VVBDET
GND
VVBDET
GND
AOR
MAX14585/MAX14585A
VB
AOR
> VVBDET
< VVBDET
X
AOR
MAX14585
UNC_
ANO_
ANO_SHUNT
0
ON
OFF
ON
0
OFF
ON
OFF
1
OFF
ON
OFF
X = DON’T CARE
Detailed Description
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 (CON) and low on-resistance (RON) necessary for high-performance switching
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.
Analog-Signal Levels
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 protection if used as outputs. These devices feature a charge
pump that generates a negative supply to allow analog
signals as low as -1.8V to pass through ANO_ when VCC
supply is greater than 2.7V. This allows AC-coupled signals 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 VBUS Detection
When VCC is below 2.7V and VB is less than 4.5V, the
switches accept signals from 0 to 3.6V but do not switch
according to the Functional Diagrams/Truth Table.
Applications Information
The devices feature a VBUS detection input (VB) that connects COM_ to UNC_ when VB exceeds the VBUS detection
threshold (VVBDET). For applications where VBUS is always
present, drive the audio override input (AOR) high to connect ANO_ to COM_ (see the Functional Diagrams/Truth
Table). Drive AOR low to have VB control the switch position. Drive AOR rail-to-rail to minimize power consumption.
VBUS Detection Input
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.
The VB input is capable of handling voltage up to 28V
for higher VBUS application. In the case where the main
power VCC is lost due to an event such as a dead battery,
VB becomes the power supply if VB is greater than 4.5V.
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents test
setup, test methodology, and test results.
Click-and-Pop Suppression (MAX14585)
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.
RC
1MΩ
CHARGE-CURRENTLIMIT RESISTOR
HIGHVOLTAGE
DC
SOURCE
Cs
100pF
RD
1500Ω
ESD Test Conditions
Human Body Model
Figure 4 shows the HBM. Figure 5 shows the current
waveform it generates when discharged into a lowimpedance state. This model consists of a 100pF capacitor charged to the ESD voltage of interest that is then
discharged into the device through a 1.5kI resistor.
IP 100%
90%
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Extended ESD Protection
Ir
AMPERES
DEVICE
UNDER
TEST
36.8%
10%
0
0
Figure 4. Human Body ESD Test Model
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
tRL
TIME
tDL
CURRENT WAVEFORM
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 VBUS Detection
RC
50MΩ TO 100MΩ
DISCHARGE
RESISTANCE
CHARGE CURRENT
LIMIT RESISTOR
HIGHVOLTAGE
DC
SOURCE
IEC 61000-4-2
RD
330Ω
Cs
150pF
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment. It does not specifically 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.
Layout
Figure 6. IEC 61000-4-2 ESD Test Model
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.
I
100%
I PEAK
90%
Ordering Information/
Selector Guide
10%
t r = 0.7ns to 1ns
t
30ns
60ns
Figure 7. IEC 61000-4-2 ESD Generator Current Waveform
PART
TOP
MARK
SHUNT
RESISTOR
PINPACKAGE
MAX14585EVB+T
AAY
Yes
10 UTQFN
MAX14585AEVB+T
AAZ
No
10 UTQFN
Note: All devices are specified over the -40°C to +85°C temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Chip Information
PROCESS: BiCMOS
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.
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 VBUS Detection
Revision History
REVISION
NUMBER
REVISION
DATE
0
5/11
DESCRIPTION
Initial release
PAGES
CHANGED
—
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
© 2011
Maxim Integrated Products
12
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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