Datasheet FSUSB31 Datasheet (Fairchild)

March 2008

FSUSB31 Low-Power 1-Port Hi-Speed USB 2.0 (480Mbps) Switch

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch

Features

■ Low On Capacitance: 3.7pF (Typical)

■ Low On Resistance: 6.5Ω (Typical)

■ Low Power Consumption: 1µA (Maximum)

– 10µA Maximum I

Volt age Range: V

■ Wide -3dB Bandwidth: > 720MHz

■ 8kV I/O to GND ESD Protection

■ Power-off Protection W hen V

Over an Expanded Control

CCT

=

IN

2.6V, V

=

4.3V

CC

= 0V , D+ / D- Pins Can

CC

Tolerate up to 4.3V

■ Packaged in:

– 8-lead MicroPak™ (1.6 x 1.6mm) – 8-lead US8 – 8-lead Ultrathin MLP (1.2 x 1.4mm)

Applications

■ Cell Phone, PDA, Digital Camera, an d Notebook

■ LCD Monitor, TV, and Set-top Box

Related Resources

■ AN-6022 Using the FSUSB30/31 to Comply with

USB 2.0 Fault Condition Requirements

Description

The FSUSB31 is a low-power, single-port, high-speed USB 2.0 switch. This p a rt is con figu red as a d oub le-pole, single-throw switch and is optimized for switching or isolating a high-speed (480Mbps) source or a high-speed and full-sp eed (12Mb ps) source. T he FSUSB3 1 is compatible with t he r eq uirem ents o f USB 2. 0 and f eat ures an extremely low on capacitance (C bandwidth of th is device (>720 MHz) exceeds the bandwidth needed to pass the third harmonic, resulting in signals with minimum edge and phase distortion. Superior channel-to-channel crosstalk minimizes interference.

The FSUSB31 contains special circuitry on the D+ pins that allows the device to withstand an over-voltage condition. This device is also designed to minimize current consumption even when the control voltage applied to the OE

pin is lower than the supply voltage (VCC). This feature is especially valuable for mobile applications, such as cell phones, allowing direct interface with the general-purpose I/Os of the baseband processor. Other applications include port isolation and switching in portable cell phones, PDAs, digital cameras, printers, and notebook computers.

) of 3.7pF. The wide

ON

/ D-

Ordering Information

Part Number Package Package Description

FSUSB31K8X MAB08A 8-Lead US8, JEDEC MO-187, Variat ion CA 3.1mm Wide FSUSB31L8X MAC08A 8-Lead MicroPak, 1.6mm Wide FSUSB31UMX (Preliminary ) UMLP08A 8-Lead, Ultrathin Mold ed Leadless Package (UMLP), 1.2 x 1.4mm

All packages are lead free per JEDEC: J-STD-020B standard.

Application Diagram

V

CC

Base Band

Processor

or FS USB

Controller

HS USB

Controller

Figure 1. Typical Application Diagram

MicroPak™ is a trademark of Fairchild Semiconductor Corporation.

FSUSB31

OE

D+

D–

USB

Connector

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch

Analog Symbol

HSD+

HSD–

OE

Figure 2. Analog Symbol

Control

Connection Diagrams

NC

7 65

V

CC

13

HSD–

2

Pin Descriptions

Pin Name Description

D+

D+, D−, HSD+, HSD− Data Ports

OE Bus Switch Enable

NC No Connect

D–

Truth Table

OE

HIGH Disconnect

LOW D+, D− = HSD+, HSD-

D–

48

GND

Function

OE

D+

HSD+

Figure 3. Pin Assignments for MicroPak

NC

HSD–

D–

GND

1

2

3

4

8

V

CC

7

OE

6

HSD+

5

D+

Figure 4. Pin Assignments for US8

Figure 5. Pin Assignments for UMLP

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommend ed op erati ng cond iti ons and stres si ng the p arts to these levels is not reco mm en ded. 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 Minimum Maximum Unit

V

CC

V

S

V

IN

I

IK

I

OUT

T

STG

ESD Human Body Model

Note:

1.The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are observed. DC swit ch vo ltage may never exce ed 4.6 V.

Supply Voltage -0.5 4.6 V DC Input Voltage

DC Switch Voltage

(1)

-0.5 4.6 V HSD -0.5 VCC+0.3 V D+, D− -0.5 +4.6 V

DC Input Diode Current -50 mA DC Output Current 50 mA Storage Temperature -65 +150 °C

All Pins 7.5 kV I/O to GND 8 kV

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch

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 Minimum Maximum Unit

V

CC

V

IN

T

A

Note:

2. Control input must be held HIGH or LOW and it must not float.

Supply V oltage 3.0 4.3 V Control Input Voltage Switch Input Voltage 0 V

(2)

0 VCC V

CC

V

Operating Temperature -40 +85 °C

DC Electrical Characteristics

All typical values are at 25°C unless otherwise specified.

T

= −40°C to +85°C

V

Symbol Parameter Conditions

V

IK

V

IH

V

IL

I

IN

I

OZ

I

OFF

R

ON

ΔR

ON

Flatness RON Flatness

R

ON

I

CC

Clamp Diode Voltage IIN = −18mA 3.0 -1.2 V

Input Voltage HIGH

Input Voltage LOW

Control Input Leakage VIN = 0V to V OFF State Leakage 0 ≤ HSD ≤ V Power OFF Leakage

Current (D+, D–) Switch On Resistance

ON

(4)

(3)

Delta R

Quiescent Supply Current

VIN = 0.0V to 4.3V,

= 0V

V

CC

(3)

VIN = 0.4V, ION = −8mA 3.0 6.5 10.0 Ω VIN = 0.4V, ION = −8mA 3.0 0.35 Ω VIN = 0.0V −1.0V,

= −8mA

I

ON

= 0.0V or VCC,

V

IN

= 0

I

OUT

CC

(V)

CC

3.0 to 3.6 1.3 V

4.3 1.7

3.0 to 3.6 0.5 V

4.3 0.7

4.3 -1.0 1.0 μA

4.3 -2.0 2.0 μA 0-2.0 2.0μA

3.0 2.0 Ω

4.3 1.0 μA

Increase in ICC Current

I

CCT

per Control Voltage and

Levels

V

CC

V

= 2.6V, VCC = 4.3V 4.3 10.0 μA

IN

Notes:

3. Measured by the voltage drop between Dn, HSD, and Dn pins at the indicated current through the switch. On resistance is determined by the lower of the voltage on the two ports.

4. Guaranteed by characterization.

A

Min. Typ. Max.

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch

Unit

AC Electrical Characteristics

All typical values are for VCC = 3.3V are at 25°C unless otherwise specified.

T

= −40°C to +85°C

Symbol Parameter Conditions

t

OFF

t

BBM

O

Xtalk

Turn-On Time,

ON

to Output

OE Turn-Off Time,

to Output

OE Propagation Delay

PD

Break-Before-Make Off Isolation

IRR

(Non-Adjacent) Non-Adjacent Channel

Crosstalk

BW -3dB Bandwidth

V

= 0.8V, RL = 50Ω,

IN

= 5pF

C

L

V

= 0.8V, RL = 50Ω,

IN

= 5pF

C

L

(5)

RL = 50Ω, CL = 5pF 3.3 0.25 ns

= 50Ω, CL = 5pF,

R

L

= 0.8V

V

IN

= 50Ω, f = 240MHz 3.0 to 3.6 -35.0 dB Figure 17

R

T

= 50Ω, f = 240MHz 3.0 to 3.6 -55.0 dB Figure 18

R

T

= 50Ω, CL = 0pF

R

T

R

= 50Ω, CL = 5pF 550

T

V

(V)

CC

3.0 to 3.6 15.0 30.0 ns Figure 13

3.0 to 3.6 12.0 25.0 ns Figure 13

3.0 to 3.6 2.0 6.5 ns Figure 14

3.0 to 3.6

A

Min. Typ. Max.

720

Unit

MHz Figure 16

Note:

5. Guaranteed by characterization.

Figure

Number

Figure 11 Figure 12

USB Hi-Speed Related AC Electrical Characteristics

(V)

Symbol Parameter Conditions

t

SK(O)

t

SK(P)

Channel-to-Channel Skew

Skew of Opposite Transi tions of the Same Output

Total Jitter

t

J

(6)

CL = 5pF 3.0 to 3.6 50.0 ps

CL = 5pF 3.0 to 3.6 20.0 ps

RL = 50Ω, CL = 5pF,

= tF = 500ps at 480 Mb ps

t

R

(PRBS = 2

15

− 1)

V

CC

3.0 to 3.6 200 ps

Note:

6.Guaranteed by design.

Capacitance

Symbol Parameter Conditions

C

OFF

Control Pin Input Capacitance VCC = 0V 1.0 pF Figure 20

IN

On Capacitance VCC = 3.3V, OE = 0V 3.7 pF Figure 19

ON

Off Capacitance VCC and OE = 3.3V 1.7 pF Figure 20

T Min. Typ. Max.

= −40°C to

T

A

+85°C

Min. Typ. Max.

= −40°C to +85°C

A

Unit

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch

Figure

Number

Figure 11 Figure 15

Figure

Number

Ty pical Characteristics

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch

0

-1

CL = 0pF

-2

= 3.3V

V

CC

-3

-4

Gain (dB)

-5

-6

-7

-8 1 10 100 1000 10000

Frequency (MHz)

Figure 6. Gain vs. Frequency Figure 7. Off Isolation

0

-10

VCC = 3.3V

-20

-30

-40

-50

-60

-70

-80

Crosstalk (dB)

-90

-100

-110

-120 1 10 100 1000

-10

-20

-30

-40

-50

-60

-70

Off Isolation (dB)

-80

-90

-100

Frequency (MHz)

0

VCC = 3.3V

1 10 100 1000

Frequency (MHz)

Figure 8. Crosstalk

Test Diagrams

V

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch

ON

FSUSB31

HSD

Dn

V

GND

IN

OE

= 0 to V

V

S

ON

CC

GND

I

ON

Figure 9. On Resistance Figure 10. Off Leakage

FSUSB31

HSD

V

IN

GND

R

S

V

OE

GND

RL, RS, and CL are functions of the application environment (see AC Electrical tables for specific values).

*CL includes test fixture and stray capacitance.

D+, D–

CL*

GND

V

R

L

OUT

NC

t

RISE

800mV

HSD+,

Input:

HSD–

400mV

Output: D+, D–

FSUSB31

OE

VS = 0 or V

Each switch port is tested separately.RON = VON / I

= 500ps

90%

50% 50%

10% 10%

V

OH

50%

V

OL

t

PLH

ID

n(OFF)

A

90%

CC

50%

t

FALL

t

PHL

V

IN

GND

= 500ps

Figure 11. AC Test Circuit Load Figure 12. Switch Propagation Delay Waveforms

(tPD)

t

OFF

FALL

ON

= 2.5ns

/ t

OFF

)

t

= 2.5ns

RISE

V

Input – OE

Output – V

CC

GND

OUT

10% 10%

V

OH

V

OL

90%

V

/2 VCC/2

CC

t

ON

90%

90%90%

Figure 13. Turn On / Turn Off Waveform (t

Test Diagrams (Continued)

V

CC

V

CC

V

O

Control Input

*CL includes test fixture and stray capacitance.

HSDn

D+, D–

HSDn

S

GND

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch

V

OUT

R

C

L

Control Input

*

V

CC

0V

V

OUT

50%

tR = tF = 2.5ns (10–90%)

0.9 x V

t

D

OUT

t

800mV

nput:

HSDn+ HSDn–

400mV

utput: D+, D–

RISE

= 500ps

V

OH

V

OL

90% 90%

50%

10%

T

= | t

SK(P)

Pulse Skew, T

50%

PHL

t

Figure 14. Break-Before-Make (t

= 500ps

t

FALL

50%

10%

50%

PLH

– t

SK(P)

PLH

|

t

PHL

Figure 15. Switch Skew Tests

t

= 500ps

RISE

800mV

Input: D+, D–

400mV

V

Output1:

HSD1+ HSD1–

V

OL

Output1: D2+, D2–

)

BBM

10%

OH

V

OH

V

OL

T

= | t

SK(O)

Output Skew, T

90% 90%

50%

t

PLH1

50%

t

– t

PLH1

SK(OUT)

PLH2

50%

| or | t

10%

PHL1

50%

t

FALL

t

– t

50%

= 500ps

PHL1

t

PHL2

|

Network Analyzer

FSUSB31

GND

V

OE

R

S

V

IN

V

S

GND

V

OUT

T

GND

RS and RT are functions of the application environment (see AC Electrical Tables for specific values).

R

GND

Figure 16. Bandwidth

Test Diagrams (Continued)

V

OE

GND

OFF-Isolation = 20 Log (V

FSUSB31

R

T

GND

VIN)

OUT

/

Figure 17. Channel Off Isolation

GND

Network Analyzer

R

S

V

IN

V

GND

V

OUT

R

T

GND

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch

S

Capacitance

Meter

F = 240MHz

V

OE

GND

HSDn

NC

FSUSB31

GND

R

T

GND

and RT are functions of the application environment

R

S

(50, 75 or 100Ω).

Crosstalk = 20 Log (V

OUT

/ VIN)

Figure 18. Non-Adjacent Channel-to-Channel Crosstalk

FSUSB31

Dn

OE

V

OE

= 0 or V

CC

Capacitance

Meter

F = 240MHz

Network Analyzer

R

S

V

IN

V

GND

R

T

GND

FSUSB31

Dn

HSDn

S

V

OUT

OE

VOE = 0 or V

CC

Figure 19. Channel On Capacitance Figure 20. Channel Off Capacitance

Application Guidance: Meeting USB 2.0 Vbus Short Requirements

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch

In section 7.1.1 of the USB 2.0 specification, it notes that USB devices must be able to withstand a Vbus short to D+ or D- when the USB devices is either powered off or powered on. The FSUSB31 can be successfully configured to meet both these requirements.

Power-Off Protection

For a Vbus short circuit, the switch is expected to withstand such a condition for at least 24 hours. The FSUSB31 has specially designed circuitry which prevents unintended signal bleed through as well as guaranteed system reliability during a power-down, overvoltage condition. The protection has been added to the common pins (D+, D-).

VCC= 3.6 V

100 Ohms

Power-On Protection

The USB 2.0 specification also notes that the USB device shoul d be capable of withs tanding a Vbus short during transmission of data. Fairchild recommends adding a 100Ω series resister between the switch VCC pin and supply rail to protect against this case. This modification works by limiting current flow back into the VCC rail during the over-voltage event so current remains within th e safe operati ng range. In this applicat ion, the switch passes the full 5.25V input signal through to the selected output, while maintaining specified off isolation on the un-selected pins.

HSD+

D+ = 5.25V

FSUSB31

HSD-

Figure 21. A 100Ω resistor in series with the VCC supply allows the FSUSB31 to withstand a Vbus

short when powered up

For more information, see Applications Note AN-6022 — Using the FSUSB30/FSUSB31 to Comply with USB 2.0 Fault Condition Requirements at www.fairchildsemi.com

D- = 5.25V

.

Physical Dimensions

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch

Figure 22. 8-Lead US8, JEDEC MO-187, Variation CA 3.1mm Wide

For MicroPak™ tape and reel specifications, please visit Fairchild’s website: http://www.fairchildsemi.com/ms/MS/MS-522.pdf Package drawings are provided as a service to customers considering Fairchild com ponents. Drawings may change in any manner

without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semic onduct or 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/

Physical Dimensions (Continued)

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch

2X

0.10

INDEX AREA

0.05

0.00

DETAIL A

(0.09)

8X

(0.1)

4

0.35

8X

0.25 (0.2)

3X

C

B

TOP VIEW

1

8

BOTTOM VIEW

1.6

1.0

23

567

2X

0.5

4

0.15

0.25

A

1.6

0.55 MAX

C

8X

C

0.10

0.05 C

0.05

0.10 CAB

0.05

Recommended Landpattern

C

(0.20)

0.35

0.25

(0.15)

0.35

0.25

DETAIL A

C

PIN #1 TERMINAL SCALE: 2X

Notes:

1. PACKAGE CONFORMS TO JEDEC MO-255 VARIATION UAAD

2. DIMENSIONS ARE IN MILLIMETERS

3. DRAWING CONFORMS TO ASME Y.14M-1994

4. PIN 1 FLAG, END OF PACKAGE OFFSET

5. DRAWING FILE NAME: MKT-MAC08AREV4

MAC08AREV4

Figure 23. 8-Lead MicroPak, 1.6mm Wide

For MicroPak™ tape and reel specifications, please visit Fairchild’s website:

http://www.fairchildsemi.com/products/logic/pdf/micropak_tr.pdf

Package drawings are provided as a service to customers considering Fairchild com ponents. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semic onduct or 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/

Physical Dimensions (Continued)

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch

2X

C

0.05

DETAIL A

PIN#1 IDENT

0.10

B

0.025

0.00

0.40

C

1.4

TOP VIEW

2

1

8

(0.2)

1.450

1.250

0.625

0.30

0.20

0.725

0.400

0.450

0.350 7X

0.250 8X

0.10 45°

0.10

A

1.20

C

2X

4

5

6

0.10

0.55 MAX

SEATING

PLANE

C

0.35

7X

0.25

0.15

8X

0.25

0.10 CAB

0.05

C

BOTTOM VIEW

DETAIL: A

SCALE : 2x

NOTES:

A. DOES NOT CONFORMS TO JEDEC STANDARD. B. DIMENSIONS ARE IN MILLIMETERS. C. DIMENSIONS AND TOLERANCES CONFORMS TO ASME Y14.5M, 1994.

D. DRAWING FILE NAME : UMLP08Arev1

Figure 24. 8-Lead, Ultrathin Molded Leadless Package (UMLP), 1.2 x 1.4mm

For MicroPak™ tape and reel specifications, please visit Fairchild’s website:

http://www.fairchildsemi.com/products/logic/pdf/micropak_tr.pdf

Package drawings are provided as a service to customers considering Fairchild com ponents. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semic onduct or 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/

FSUSB31 — Low-Power 1-Port Hi-Speed USB 2.0 (480 Mbps) Switch