FSA806UMX_技术文档

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July 2012

FSA806 — USB2.0 High-Speed (480Mbps), UART, and

Audio Switch with Negative Signal Capability

Features

Description

The FSA806 is a 3:1 USB accessory switch that enables

USB data, stereo and mono audio, and UART data to

.

3:1 Switch Handles:

-

Audio Headsets

UART

Up to Two High- and Low-Speed USB Data

share

a common connector port. Two ports are

designed for high-speed USB 2.0 signaling, while also

capable of full speed USB and UART communication.

The architecture is designed to allow audio signals to

swing below ground so a common USB and headphone

jack can be used for personal media players and

portable peripheral devices.

.

Negative-Swing-Capable Audio Channel

Built-in Termination Resistors for Audio Pop

Reduction

The FSA806 meets both USB Rev. 2.0 and micro-USB

specifications.

.

Simple Switch Control Using Two Select Pins

Applications

.

Cell Phones, MP3 Players, PDAs

Ordering Information

Operating Temperature

Part Number

Top Mark

Package

Range

12-Lead Quad, 1.8 x 1.8mm Ultrathin Molded

Leadless Package (UMLP)

FSA806UMX

-40 to +85°C

KN

VCC

FSA806

R_HOS

L_HOS

R

3:1

MUX

and

Charge

Pump

DP_HOST

DM_HOST

DP_CO

DM_CO

GN

DP_HOST

DM_HOS

SEL[0

SEL[1

Switc

Contro

Figure 1. Functional Block Diagram

FSA806 • Rev. 1.0.1

www.fairchildsemi.com

Application Diagram

Baseband

Processor

VCC

FSA806

mini/micro

US

R_HOST

L_HOST

Audio

Codec

V_BU

ID

R

3:1

MUX

and

DP_HOST2

DM_HOST2

HS USB /

FS USB

DP_CON

Charge

Pump

DM_CON

GND

DP_HOST1

DM_HOST1

HS USB /

FS USB

SEL[0]

SEL[1]

Switch

Control

Figure 2. Typical Application

Functional Description

The FSA806 USB2.0 accessory switch is designed to

consolidate wired accessories for portable devices, such

as cellular telephones and portable audio players. The

benefits of consolidation include reduced space

requirements from a reduction of connectors and their

size. The micro-USB connector, for example, reduces

connector height and depth, allowing for slimmer overall

designs. Using the USB industry standard and a common

connector type, for accessories such as chargers and

headsets, greatly reduces the waste associated with new

phone purchases by allowing re-use of the accessories.

Applications with Multiple USB Controllers

When operating with two USB controllers, it is

recommended to configure the switches to OPEN before

switching to the other (second) USB interface. The

OPEN setting duration should be long enough for the

accessory to go to a SE0 state, when the switch is set to

the other (second) USB port, the new controller re-

enumerates.

Using just five wires for all connection types

considerably reduces the cost of wired accessories and

simplifies their construction. The FSA806 facilitates

adopting this methodology because it is designed to

redirect the DP/DM pins from the USB connector to one

of three ports at the baseband’s discretion.

FSA806 • Rev. 1.0.1

www.fairchildsemi.com

2

Mode Descriptions

The FSA806 select pins control the switching

operations, SEL[0] and SEL[1] described in Table 1

Table 1.

Selection Truth Table

SEL[1] SEL[0]

Switch Action

Description

0

OPEN

Open all switch paths (device in low-power mode)

Closes USB1 path to D+/D-, default condition⁽¹⁾

- DP_CON connected to DP_HOST1

- DM_CON connected to DM_HOST1

0

1

USB1, UART

USB2, UART

AUDIO

Closes USB2 path to D+/D-

- DP_CON connected to DP_HOST2

- DM_CON connected to DM_HOST2

1

0

1

Closes audio path to D+/D- only

- DP_CON connected to R_HOST

- DM_CON connected to L_HOST

1

Notes:

1. The SELECT pins are CMOS inputs and should not be left in a floating condition. Some applications require a

UART path be in the CLOSED position on power-up for initial programming of the device under test. If that

condition is desired, the two SELECT pins should be pulled to the correct levels with external resistors that

should exceed 100KΩ to reduce the static power consumption. In other applications, adding weak pull-down

resistors to GND defaults the device to all paths open (low-power mode).

2. When the audio switch is in the OPEN position, the R and L are terminated to GND with internal termination

resistors to discharge any stray capacitance that could cause audio pop.

FSA806 • Rev. 1.0.1

www.fairchildsemi.com

3

Pin Configuration

Figure 3. 12-Pin, UMLP Pin Assignments (Top-Through View)

Pin Descriptions

Name

Pin #

Description

USB, UART Interface

D+ signal, dedicated USB port to be connected to the resident USB or UART transceiver on

the phone.

DP_HOST1

DM_HOST1

DP_HOST2

DM_HOST2

3

D- signal, dedicated USB port to be connected to the resident USB or UART transceiver on

the phone.

4

5

D+ signal, dedicated USB port to be connected to the resident USB or UART transceiver on

the phone.

6

D- signal, dedicated USB port to be connected to the resident USB or UART transceiver on

the phone.

Audio Interface

R_HOST

7

8

Right audio channel from phone audio codec.

Left audio channel from phone audio codec.

L_HOST

Power Interface

V_CC

2

Input voltage supply pin to be connected to the phone battery output.

Connector Interface

GND

9

Ground

11

Connected to the USB connector D+ pin; depending on the FSA806 signaling mode, this pin

can share DP_HOST1, DP_HOST2 or R_HOST signals.

DP_CON

10

Connected to the USB connector D- pin; depending on the FSA806 signaling mode, this pin

can share DM_HOST1, DM_HOST2 or L_HOST signals.

DM_CON

Switch Control

SEL[1:0]

12, 1 Switch selection pins; refer to Table 1 for truth table.

FSA806 • Rev. 1.0.1

www.fairchildsemi.com

4

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be

operable above the recommended operating conditions and stressing the parts to these levels is not recommended.

In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.

The absolute maximum ratings are stress ratings only.

Symbol

Parameter

Supply Voltage from Battery / Baseband

USB

Min.

-0.5

Max.

6.0

Unit

V_CC

V

_BUS+0.5

V_SW

Switch I/O Voltage

Stereo/Mono Audio Path Active

Vcc-8.5 V_CC+0.5

V

All Other Channels

-0.5

-50

V_CC+0.5

I_IK

Input Clamp Diode Current

Switch I/O Current (Continuous)

mA

USB

50

60

I_SW

Audio

All Other Channels

USB

50

150

+150

+260

15

mA

Peak Switch Current (Pulsed at 1ms

Duration, <10% Duty Cycle)

Audio

I_SWPEAK

All Other Channels

T_STG

T_J

Storage Temperature Range

-65

°C

Maximum Junction Temperature

T_L

Lead Temperature (Soldering, 10 Seconds)

Air Gap

Contact

All Pins

USB Connector Pins

IEC 61000-4-2 System

(D+, D-, V_BUS

)

8

ESD

kV

Human Body Model, JEDEC JESD22-A114

Charged Device Model, JEDEC JESD22-C101

3

2

Recommended Operating Conditions

The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended

operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not

recommend exceeding them or designing to Absolute Maximum Ratings.

Symbol

Parameter

Min.

2.7

Max.

4.4

Unit

V

V_CC

Battery Supply Voltage

Switch I/O Voltage

USB/UART Path Active

Audio Path Active

0

4.4

V

V_SW

T_A

V_CC-7

-40

2.0

V

Operating Temperature

+85

ºC

FSA806 • Rev. 1.0.1

www.fairchildsemi.com

5

Switch Path DC Electrical Characteristics

All typical values are at 25ºC unless otherwise specified.

T_A= -40 to +85°C

Min. Typ. Max.

Symbol

Parameter

V_CC(V)

Conditions

Unit

Host Interface Pins (SEL[2:0])

V_IH

V_IL

I_IN

Input High Voltage

Input Low Voltage

Control Input Leakage

3.2 to 4.4

1.3

V

0.7

0 to 4.4 V_SW=0 to V_CC

0 ≤ DP_CON, DM_CON,

-1

-2

1

2

µA

I_OZ

Off-State Leakage

4.4

DP_HOSTn, DM_HOSTn,

R_HOST, L_HOST ≤ 3.6V

µA

Switch Off Characteristics

All Ports Except MIC & Audio

path V_SW=0V to 4.4V,

Figure 8

I_OFF

Power-Off Leakage Current

0

10

9

USB Switch On Paths

HS USB Range Switch On

Resistance

V_{DP_CON/DM_CON}=0V, 0.4V,

R_ONUSB

3.2 to 4.4

6

8

Ω

I

_ON=8mA, Figure 7

V_{DP_CON/DM_CON}=0V, 3.2V,

_ON=8mA, Figure 7

UART Range Switch On

Resistance

R_ONUART

I

Audio R/L Switch On Paths

R_ONAUDAudio Switch On Resistance

3.2 to 4.4

3.8

3

1

Ω

V_L/R=-0.8V, 0.8V, I_ON=30mA,

Figure 7

R_FLAT

Audio R_ONFlatness⁽¹⁾

0.16

1

R_TERM

Internal Termination Resistors

kΩ

Total Switch Current Consumption

Battery Supply Sleep Mode

Average Current

Static Current During Sleep

Mode (SEL[2:0]=0)

I_CCSL

3.2 to 4.4

µA

USB/UART Mode

20

35

1

µA

Battery Supply Active Mode

Average Current

I_CCWK

Audio Mode

V_SEL=2.8V and V_CC=4.4V

V_SEL=1.8V and V_CC=4.4V

8

Increase in I_CCSL/I_CCWKCurrent

I_CCSELT

3.2 to 4.4

per Control Voltage and V_CC

10

Note:

3. Flatness is defined as the difference between the maximum and minimum values of on resistance over the

specified range of conditions.

FSA806 • Rev. 1.0.1

www.fairchildsemi.com

6

Switch Path AC Electrical Characteristics⁽⁴⁾

All typical value are for V_CC=3.8V at 25ºC unless otherwise specified.

TA = -40 to +85°C

Min. Typ. Max.

Symbol

Parameter

V_CC(V)

Conditions

Unit Figure

f=20kHz, R_T=32Ω,

C_L=0pF

Audio Mode

3.8

-95

-75

Active

Channel

Crosstalk

f=1MHz, R_T=50Ω,

C_L=0pF

Xtalk

dB Figure 10

DP_CON

to

DM_CON

USB Mode

3.8

f=240MHz, R_T=50Ω,

C_L=0pF

-36

Audio Rejection

f=20kHz, R_T=32Ω,

C_L=0pF

-100

L_HOST to DM_CON,

R_HOST to DP_CON

Off

Isolation

Rejection

O_IRR

dB

Figure 9

f=1 MHz, R_T=50Ω,

C_L=0pF

-85

-35

USB Rejection

Ratio

DM_HOST to

DM_CON, DP_HOST

to DP_CON

f=240MHz, R_T=50Ω,

C_L=0pF

20Hz to 20kHz,

R_L=16Ω, Input

Signal Range

1.6V_PP

0.10

0.07

%

Figure 14

Total Harmonic Distortion + Noise

(Audio Path)

THD+N

3.8

20Hz to 20kHz,

R_L=32Ω, Input

Signal Range

1.6V_PP

Note:

4. Guaranteed by characterization; not production tested.

Capacitance

T_A= -40 to +85°C

Symbol

Parameter

V_CC(V)

Conditions

Unit

Figure

Min. Typ. Max.

Select Pins

C_IN

0

V_BIAS=0.2V

_BIAS=0.2V, f=1MHz

V_BIAS=0.2V, f=1MHz

2.5

pF

Figure 12

Figure 13

Capacitance⁽⁵⁾

D+, D- On Capacitance

(HS USB Mode)⁽⁵⁾

C_{OFF(D+, D-)}

3.8

V

4.0

6.8

D+, D- On Capacitance

(HS USB Mode)⁽⁵⁾

C_{ON(D+, D-)}

Note:

5. Guaranteed by characterization; not production tested.

www.fairchildsemi.com

FSA806 • Rev. 1.0.1

7

High-Speed USB Eye Compliance Results

Figure 4. High-Speed Test Results

(DP_CON/DM_CON – DP_HOST1/DM_HOST1)

Figure 5. High-Speed Test Results

(DP_CON/DM_CON – DP_HOST2/DM_HOST2)

Figure 6. High-Speed Eye Compliance Input Signal

FSA806 • Rev. 1.0.1

www.fairchildsemi.com

8

Test Diagrams

V_ON

I_A(OFF)

NC

A

nB

n

nA

V

IN

V

IN

Select

I_ON

GND

Select

GND

V

= 0 orV

cc

Sel

V

= 0 or V

cc

Sel

**Each switch port is tested separately.

R_ON= V_ON/ I_ON

Figure 7. On Resistance

Figure 8. Off Leakage

Network Analyzer

NC

R

Network Analyzer

S

R

S

V

IN

V_{S1, S2, S3}

V

GND

S

V

S

GND

R

T

GND

V

R

GND

Sel

T

GND

V

GND

OUT

V

GND

OUT

GND

R

T

R_Sand R_Tare functions of the application

environment (see AC/DC tables).

R

GND

T

GND

R_Sand R_Tare functions of the application

environment (see AC tables for values).

Off-Isolation = 20 Log (V_OUT/ V_IN

)

CROSSTALK = 20 Log (V_OU

Figure 9. Channel Off Isolation

Figure 10. Active Channel Crosstalk

Generator

V_CC

B

Input – V_SEL

V_IN

Off

On

Off

mA

R_S

V_S

0V

V_OUT

C_L

GND

ΔV_OUT

nS_n

V_OUT

V

SEL

C_Lincludes test fixture and stray capacitance

Q = ΔV_OUT• C

L

GND

Figure 11. Charge Injection Test

FSA806 • Rev. 1.0.1

www.fairchildsemi.com

9

Test Diagrams (Continued)

nB

n

nS

n

Capacitance

V_Sel= 0 or V_cc

Meter

f = 1MHz

nB

n

Figure 12. Channel Off Capacitance

nB

Capacitance

n

Meter

nS

n

V

_Sel= 0 orVcc

f = 1MHz

nB

n

Figure 13. Channel On Capacitance

Audio Analyzer

R

S

V

IN

V

GND

S

GND

V

V_CNTRL

OUT

GND

R

T

V

_Sel= 0 or V_cc

GND

R_Sand R_Tare functions of the application

environment (see AC Tables for specific values).

Figure 14. Total Harmonic Distortion + Noise

FSA806 • Rev. 1.0.1

www.fairchildsemi.com

10

Physical Dimensions

(11X)

0.563

2.10

1.80

A

B

0.10

C

0.588

0.40

2X

1

1.80

0.10

2.10

PIN#1 IDENT

C

(12X)

0.20

TOP VIEW

2X

RECOMMENDED

LAND PATTERN

0.55 MAX.

0.152

0.10

0.08

C

0.45

0.35

0.10

0.05

0.00

SEATING

PLANE

C

0.10

SIDE VIEW

DETAIL A

SCALE : 2X

0.35

(11X)

NOTES:

0.45

3

6

A. PACKAGE DOES NOT FULLY CONFORM TO

JEDEC STANDARD.

0.40

B. DIMENSIONS ARE IN MILLIMETERS.

DETAIL A

C. DIMENSIONS AND TOLERANCES PER

ASME Y14.5M, 1994.

1

PIN#1 IDENT

D. LAND PATTERN RECOMMENDATION IS

BASED ON FSC DESIGN ONLY.

12

9

0.25

0.15

(12X)

BOTTOM VIEW

0.10

C A B

E. DRAWING FILENAME: MKT-UMLP12Arev4.

0.05

C

PACKAGE

EDGE

LEAD

OPTION 2

SCALE : 2X

OPTION 1

SCALE : 2X

Figure 15. 12-Lead, Ultrathin Molded Leadless Package (UMLP)

Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner

without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or

obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the

warranty therein, which covers Fairchild products.

Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:

http://www.fairchildsemi.com/packaging/.

FSA806 • Rev. 1.0.1

www.fairchildsemi.com

11

FSA806 • Rev. 1.0.1

www.fairchildsemi.com

12

ON Semiconductor and

are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.

ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent

coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.

ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability

arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.

Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,

regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or

specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer

application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not

designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification

in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized

application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and

expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such

claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This

literature is subject to all applicable copyright laws and is not for resale in any manner.

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1


型号：	FSA806UMX
厂家：	ONSEMI
描述：	USB2.0 高速，UART，音频开关，带负信号能力开关
文件：	总14页 (文件大小：849K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

FSA806UMX [ONSEMI]

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