MAXIM MAX14585, MAX14585A User Manual

E V A L U A T I O N K I T A V A I L A B L E

19-5878; Rev 0; 5/11

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Capability and High-Voltage-Tolerable V

General Description

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.

The devices feature a V

detection input (VB) that can

BUS

handle voltage up to 28V to automatically switch to the USB signal path upon detection of a valid V > V

). In a dead battery situation, the voltage on VB

VBDET

signal (VB

BUS

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.

Applications

Cell Phones

PDAs and Handheld Devices

Tablet PCs

S Low Power Consumption

 Low Supply Current 7µA (typ) Single 2.7V to 5.5V Supply Operation, V

S Flexible Design

 Dual Power-Supply Architecture, VB and V ANO� Channel Override Control Input

S High Level of Integration for Performance

 28V-Capable VB Input with Automatic UNC� Selection by V 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

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.

Benefits and Features

BUS

Typical Operating Circuit

BUS

Detection

CC

3.0V

0.1µF

V

CC

MAX14585/MAX14585A

HI-SPEED

USB

TRANSCEIVER

AUDIO

AMPLIFIER

�� Maxim Integrated Products 1

UNC1

UNC2

AN01

AN02

GND

MAX14585

ONLY

AOR

V

CCINT

V

VBDET

COM1

COM2

V

B

COMBINATION

USB AND AUDIO

CONNECTOR

V

BUS

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.)

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

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.

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

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 four-

layer 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

POWER SUPPLY

Power-Supply Range V

Supply Current I

Power-Supply Rejection Ratio PSRR

VB Detect Threshold V

VB Detect Hysteresis V

VB Detect Leakage Current VB = 5.5V 40

ANALOG SWITCH

Analog-Signal Range

ANO_ On-Resistance R

UNC_ On-Resistance R

ANO_ On-Resistance Match Between Channels

CC

SUPPLY

VBDET

VBDET_H

V

UNC_

V

ANO_

V

COM_

ON(NO)

ON(NC)

DR

ON(NO)

VCC = 4.2V, 0V < V V

R 1.4V

AOR

f = 10kHz, VCC = 3.0 Q 0.3V, R

= 50I

COM_

V

rising, VCC R 2.7V

BUS

V

falling, VCC R 2.7V

BUS

VCC R 2.7V for UNC_

,

VCC R 2.7V for ANO_, COM_

VCC = 3V, V I

= 10mA

COM_

VCC = 3V, V I

= 10mA

COM_

VB = 4.5V, VCC = 0V to 5.5V, V to 2.5V, V

VCC = 3V, V (Note 3)

AOR

= -1.5V, +1.5V

ANO_

= 0V to VCC,

UNC_

= 0V, I

ANO_

< 0.4V,

COM_

UNC_

= 10mA

= 0V

2.7 5.5 V

7 14

100 dB

3 3.3 3.6 V

0.2 V

0

-1.8

min(3.6V,

VCC)

min(3.6V,

VCC)

3 6

0.2

FA

V

I

�� Maxim Integrated Products 2

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Capability and High-Voltage-Tolerable V

BUS

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

ANO_ On-Resistance Flatness R

UNC_ On-Resistance Flatness R

DR

FLAT(NO)

FLAT(NC)

Shunt Switch Resistance R

AOR Pulldown Resistor R

UNC_ Off-Leakage Current I

ANO_ Off-Leakage Current I

COM_ Off-Leakage Current I

COM_ On-Leakage Current I

UNC_(OFF)

ANO_(OFF)

COM_(OFF)

COM_(ON)

Turn-On Time t

Turn-Off Time t

Break-Before-Make Time Delay t

Output Skew (Same Switch) t

Output Skew Between Switches t

ANO_ Off-Capacitance C

UNC_ Off-Capacitance C

NO_(OFF)VANO_

NC_(OFF)VUNC_

ON(NC)

SH

AOR

ON

OFF

D

SK(P)

SK(O)

VCC = 3V, V

UNC_

= 0V, I

COM_

= 10mA

(Note 3)

VCC = 3V, I

COM_

= 10mA, V

ANO_

= -1.5V

to +1.5V (Note 4)

VCC = 3V, I

COM_

= 10mA, V

UNC_

= 0V to

VCC (Note 4)

I

ANO_

= 2mA, V

CC

R 2.7V

250 1200

Switch open, V V

= -1.5V, 2.5V, VCC = 3V

COM_

MAX14585A, switch open, V 0V, V

V

CC

V

UNC_

= 0V, 2.5V, VCC = 3V

COM_

= 0V, V

COM_

= V

ANO_

USB mode

Audio mode

ANO_ to COM_, Figure 1

UNC_ to COM_, Figure 1

ANO_ from COM_, Figure 1

UNC_ from COM_, Figure 1

= 2.5V, 0V

UNC_

ANO_

= 3.6V,

= unconnected

V

= 3V, V

CC

ANO_

2.5V, unconnected, V

= 0V, 2.5V

COM_

V

= 3V, V

CC

UNC_

2.5V, unconnected, V

= -1.5V, 2.5V

COM_

V

= 3V, V

CC

RL = 50I; V

ANO_

AOR

VB = 0V to 5V or VB = 5V, V

= 0V to V

AOR

V

= 3V, V

CC

RL = 50I; V

UNC_

AOR

VB = 0V to 5V

V

= 3V, V

CC

RL = 50I; V

ANO_

AOR

VB = 0V to 5V

V

= 3V, V

CC

RL = 50I; V

UNC_

AOR

VB = 0V to 5V or VB = 5V, V

= 0V to V

AOR

= 2.5V,

= 0V,

= 1.5V, = 0V,

CC

= 1.5V, = 0V,

CC

-100 +100 nA

-10 +800

-200 +200 nA

RL = 50I, time delay between one side of the switch open and the other side closed

Figure 2 40 ps

= 0.5V

, DC bias = 0V, f = 1MHz 2.5 pF

P-P

, DC bias = 0V, f = 1MHz 2.5 pF

P-P

Detection

0.2

0.04 0.2

700 1300

45 120

8 40

28

I

kI

FA

Fs

�� 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)

(TA = -40NC to +85NC, unless otherwise noted. Typical values are at VCC = 3V, TA = +25NC.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V

= 0.5V

On-Capacitance C

COM_(ON)

COM_

f = 240MHz, RL = 50I

AC PERFORMANCE

ANO_ -3dB Bandwidth BW

UNC_ -3dB Bandwidth BW

Off-Isolation

Crosstalk

Total Harmonic Distortion Plus Noise

THD+N

RS = RL = 50I, V

NO

RS = RL = 50I, V

NC

f = 100kHz, V Figure 3

f = 100kHz, V Figure 3 (Note 5)

ANO_ to COM_, f = 20Hz to 20kHz, V

= 0.5V

COM_

LOGIC INPUT

AOR Input Logic-High V

AOR Input Logic-Low V

AOR Input Leakage Current I

IH

IN

IL

VCC R 2.7V

V

= 0V or VCC, VCC R 2.7V

AOR

ESD PROTECTION

Human Body Model

COM1, COM2

IEC 61000-4-2 Air Gap Discharge

IEC 61000-4-2 Contact Discharge

All Other Pins Human Body Model

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: 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.

, DC bias = 0V,

P-P

= 0dBm, Figure 3

ANO_

= 0dBm, Figure 3

UNC_

= 1V

COM_

= 1V

COM_

, DC bias = 0V, RL = 600I

P-P

, RL = 50I,

RMS

, RL = 50I,

RMS

6.7 pF

960 MHz

-84 dB

-86 dB

0.042 %

1.4 V

0.4 V

-22 +22

Q15

Q8

Q2

FA

kV

V

IN_

LOGIC INPUT

CL INCLUDES FIXTURE AND STRAY CAPACITANCE.

V RL + R

Figure 1. Switching Time

�� Maxim Integrated Products 4

ANO_ OR UNC_

CONTROL

= V

OUT

MAX14585

MAX14585A

R

IN_ (

L

ON

COM_

)

V

LOGIC INPUT

V

OUT

R

L

C

L

SWITCH

OUTPUT

IH

V

IL

0V

50%

V

OUT

0.9 x V

0UT

t

ON

CONTROL DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH.

tR < 5n s t

< 5n s

F

t

OFF

0.1 x V

OUT

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Capability and High-Voltage-Tolerable V

MAX14585

50%

MAX14585A

CONTROL

VIL TO V

t

PHLX

COM1

COM2

IH

50%

t

= t

PLH

V

OUT+

t

= t

PHL

t

R

L

R

L

SK(O)

t

SK(P)

CONTROL DEPENDS ON SWITCH CONFIGURATION.

V

OUT-

t

INRISE

90%

10% 10%

t

OUTRISE

10% 10%

= |t = |t

90%

PLHX

PHLX

PLHX PLHX

OR t OR t

PLHY

PHLY

- t

PLHY

- t

PHLX

UNC1 OR

R

S

V

IN+

V

IN-

V

CC

V

IN+

0V

V

CC

V

IN-

0V

V

CC

V

OUT+

0V

ANO1

UNC2 OR

R

S

ANO2

t

PLHX

BUS

| OR |t

PHLX

| OR |t

PLHY

t

INFALL

90%

Detection

- t

|

PHLY

- t

|

PHLY

t

OUTFALL

V

CC

V

OUT-

0V

t

PHLY

50%

Figure 2. Output Skew

COM1

MAX14585

UNC1

MAX14585A

50

Ω

ANO1*

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

50%

t

PLHY

V

NETWORK ANALYZER

Ω

V

IN

50

50Ω

OFF-ISOLATION = 20log

ON-LOSS = 20log

V

OUT

MEAS REF

50

Ω

50

Ω

CROSSTALK = 20log

OUT

V

IN

V

OUT

V

IN

V

OUT

V

IN

*FOR CROSSTALK THIS PIN IS ANO2. UNC2 AND COM2 ARE OPEN.

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Capability and High-Voltage-Tolerable V

Typical Operating Characteristics

(VCC = 3.0V, TA = +25NC, unless otherwise noted.)

UNC_ ON-RESISTANCE vs. COM_ VOLTAGE

3.3

I

= 10mA

UNC_

3.2

3.1

3.0

2.9

2.8

ON-RESISTANCE (Ω)

2.7

2.6

2.5 0 4

V

COM_

VCC = 2.7V

= 5V

V

CC

(V)

ANO_ ON-RESISTANCE vs. COM_ VOLTAGE

4.0

3.8

3.6

3.4

3.2

3.0

2.8

ON-RESISTANCE (Ω)

2.6

2.4

2.2

2.0

-2 3

TA = +85°C

V

COM_

TA = +25°C

TA = -40°C

(V)

VCC = 3V I

ANO_

MAX14585/85A toc01

321

MAX14585/85A toc04

= 10mA

210-1

ANO_ ON-RESISTANCE vs. COM_ VOLTAGE

3.3

I

= 10mA

ANO_

3.2

3.1

3.0

2.9

2.8

ON-RESISTANCE (Ω)

2.7

2.6

2.5

-2 4

V

CC

V

= 5V

COM_

VCC = 2.7V

(V)

COM_ ON-LEAKAGE CURRENT

vs. TEMPERATURE

40

V

= 2.5V

COM_

35

30

25

20

15

10

ON-LEAKAGE CURRENT (nA)

5

0

-40 85 TEMPERATURE (°C)

4.0

3.8

3.6

MAX14585/85A toc02

3.4

3.2

3.0

2.8

ON-RESISTANCE (Ω)

2.6

2.4

2.2

32-1 0 1

6035-15 10

2.0

600

500

MAX14585/85A toc05

400

300

200

OFF-LEAKAGE CURRENT (µA)

100

0

BUS

Detection

UNC_ ON-RESISTANCE vs. COM_ VOLTAGE

TA = +85°C

0 3.0

V

COM_

TA = +25°C

TA = -40°C

(V)

VCC = 3V

= 10mA

I

UNC_

2.52.01.51.00.5

COM_ OFF-LEAKAGE CURRENT

vs. TEMPERATURE

VCC = 0V

= 3.6V

V

COM_

-40 85 TEMPERATURE (°C)

603510-15

MAX14585/85A toc03

MAX14585/85A toc06

SUPPLY CURRENT vs. SUPPLY VOLTAGE

10

9

8

7

6

5

4

3

SUPPLY CURRENT (µA)

2

1

0

TA = -40°C

2.5 5.5 SUPPLY VOLTAGE (V)

TA = +25°C

�� Maxim Integrated Products 6

TA = +85°C

5.04.54.03.53.0

MAX14585/85A toc07

CURRENT (µA)

B

V

VB SUPPLY CURRENT vs. SUPPLY VOLTAGE

70

V

= 0V OR 3V

AOR

60

50

40

30

20

10

0

0 30

VB VOLTAGE (V)

252015105

MAX14585/85A toc08

THRESHOLD (V)

B

V

VB DETECT THRESHOLD vs. TEMPERATURE

3.5

3.4

3.3

3.2

3.1

3.0

2.9

2.8

2.7

2.6

2.5

-40 85

VB RISING

VB FALLING

603510-15

TEMPERATURE (°C)

MAX14585/85A toc09

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Capability and High-Voltage-Tolerable V

Typical Operating Characteristics (continued)

(VCC = 3.0V, TA = +25NC, unless otherwise noted.)

TURN-OFF TIME vs. SUPPLY VOLTAGE

40

TOGGLE V

35

30

25

20

15

TURN-ON TIME (µs)

10

5

0

2.5 5.5

B

ANO_ FROM COM_

UNC_ FROM COM_

SUPPLY VOLTAGE (V)

TOTAL HARMONIC DISTORTION PLUS NOISE

10

RL = 600Ω

1

0.1

THD+N (%)

0.01

0.001 10 100,000

MAX14585/85A toc10

5.04.53.0 3.5 4.0

vs. FREQUENCY

10,0001000100

FREQUENCY (Hz)

TURN-ON TIME vs. SUPPLY VOLTAGE

100

TOGGLE V

90

80

70

60

50

40

TURN-ON TIME (µs)

30

20

10

0

2.5 5.5

B

SUPPLY VOLTAGE (V)

MAX14585/85A toc13

UNC_ TO COM_

ANO_ TO COM_

0.5

0.4

0.3

0.2

0.1

-0.1

-0.2

DIFFERENTIAL SIGNAL (V)

-0.3

-0.4

-0.5

0

-10

-20

MAX14585/85A toc11

-30

-40

-50

-60

MAGNITUDE (dB)

-70

-80

-90

5.04.54.03.53.0

-100

UNC_ EYE DIAGRAM

0

TIME ((x10-9)s)

BUS

Detection

FREQUENCY RESPONSE

ON-LOSS

OFF-ISOLATION

CROSSTALK

0.1 1000 FREQUENCY (MHz)

MAX14585/85A toc14

2.00 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8

100101

MAX14585/85A toc12

�� Maxim Integrated Products 7

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Capability and High-Voltage-Tolerable V

TOP VIEW

COM2 COM1

AOR

8

9

V

B

10

UNC2

+

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 V

6 COM1 Common Terminal for Switch 1

7 COM2 Common Terminal for Switch 2

8 AOR

9 V

10 UNC2 USB Input 2. Normally closed terminal for switch 2.

CC

Positive Supply-Voltage Input. Bypass VCC to GND with a 0.1FF capacitor as close as possible to the device.

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.

V

B

Detection Input. If VB R V

BUS

7 6

MAX14585

MAX14585A

1 2

UNC1 ANO2

UTQFN

, COM_ connects to UNC_. Otherwise, COM_ connects to ANO_.

VBDET

5

V

CC

4

GND

3

ANO1

BUS

Detection

Pin Configuration

Pin Description

�� Maxim Integrated Products 8

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Capability and High-Voltage-Tolerable V

Functional Diagrams/Truth Table

V

CC

UNC1

UNC2

ANO1

ANO2

MAX14585

V

CCINT

V

VBDET

COM1

COM2

V

B

UNC1

UNC2

ANO1

ANO2

MAX14585A

BUS

V

CC

V

Detection

CCINT

COM1

COM2

V

B

V

VBDET

GND

AOR

> V

< V

X = DON’T CARE

V

B

VBDET

X

MAX14585/MAX14585A

AOR

0

1

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.

UNC_

ON

OFF

ANO_

OFF

ON

GND

MAX14585

ANO_SHUNT

ON

OFF

AOR

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 V

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.

V

Detection Input

The devices feature a V

BUS

nects COM_ to UNC_ when VB exceeds the V threshold (V

). For applications where V

VBDET

BUS

detection input (VB) that con-

detection

BUS

is always

BUS

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 posi-

tion. Drive AOR rail-to-rail to minimize power consumption.

The VB input is capable of handling voltage up to 28V for higher V

application. In the case where the main

BUS

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.

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.

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.

ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results.

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.

Applications Information

BUS

Detection

Extended ESD Protection

ESD Test Conditions

Human Body Model

R

C

Ω

1M

CHARGE-CURRENT-

LIMIT RESISTOR

HIGH-

VOLTAGE

DC

SOURCE

Figure 4. Human Body ESD Test Model

C

s

100pF

�� Maxim Integrated Products 10

R

D

1500Ω

DISCHARGE

RESISTANCE

STORAGE CAPACITOR

DEVICE UNDER

TEST

IP 100%

90%

AMPERES

36.8%

10%

0

t

RL

Figure 5. Human Body Current Waveform

I

r

TIME

t

DL

CURRENT WAVEFORM

PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE)

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Capability and High-Voltage-Tolerable V

R

C

50MΩ TO 100MΩ

CHARGE CURRENT

LIMIT RESISTOR

HIGH-

VOLTAGE

DC

SOURCE

Figure 6. IEC 61000-4-2 ESD Test Model

100%

90%

PEA K

I

C

s

150pF

I

R

D

330Ω

DISCHARGE

RESISTANCE

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.

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.

Ordering Information/

BUS

Detection

IEC 61000-4-2

Layout

Selector Guide

10%

tr = 0.7ns to 1ns

Figure 7. IEC 61000-4-2 ESD Generator Current Waveform

30ns

60ns

Chip Information

PROCESS: BiCMOS

PART

MAX14585EVB+T AAY Yes 10 UTQFN

t

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.

TOP

MARK

SHUNT

RESISTOR

PINPACKAGE

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

10 UTQFN V101A1CN+1

PACKAGE

CODE

OUTLINE

NO.

21-0028 90-0287

LAND

PATTERN NO.

�� Maxim Integrated Products 11

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Capability and High-Voltage-Tolerable V

BUS

Detection

Revision History

REVISION

NUMBER

0 5/11 Initial release —

REVISION

DATE

DESCRIPTION

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 12

©

2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

MAXIM MAX14585, MAX14585A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

General Description

Applications

Benefits and Features

Typical Operating Circuit

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

Typical Operating Characteristics

Pin Configuration

Pin Description

Functional Diagrams/Truth Table

Detailed Description

Analog-Signal Levels

Click-and-Pop Suppression (MAX14585)

Applications Information

Extended ESD Protection

ESD Test Conditions

Human Body Model

IEC 61000-4-2

Layout

Chip Information

Package Information

Revision History