Fairchild FSUSB31 service manual

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

Fairchild FSUSB31 service manual

Specifications and Main Features

Frequently Asked Questions

User Manual