Fairchild FSUSB20 service manual

FSUSB20

Low-Power 1-Port High-Speed USB (480Mbps) Switch

FSUSB20 Low-Power 1-Port High-Speed USB (480Mbps) Switch

September 2006

Features

■ −30dB off isolation at 250MHz

■ −30dB non-adjacent channel crosstalk at 250MHz

■ 4.5Ω typical on resistance (R

■ −3dB bandwidth: >720MHz

■ Low power consumption (1µA max)

■ Control input: LVTTL compatible

■ Bi-directional operation

■ USB high-speed and full-speed signaling capability

■ Space-saving Pb-free packaging

ON

)

Applications

■ Cell phone, PDA, digital camera, and notebook

Ordering Information

General Description

FSUSB20 is a low-power high-bandwidth switch specially designed for switching high-speed USB 2.0 signals in handset and consumer applications, such as cell phones, digital cameras, and notebooks with hubs or controllers with limited USB I/Os. The wide bandwidth (>720MHz) of this switch allows signals to pass with minimum edge and phase distortion. Superior channel-tochannel crosstalk results in minimal interference. It is compatible with the high-speed USB 2.0 standard.

Order

Number

FSUSB20L10X MAC010A Yes EY 10-Lead MicroPak™, 1.6 x 2.1mm

FSUSB20BQX MLP014A Yes USB20 14-Terminal Depopulated Quad Very-Thin Flat Pack No Leads

FSUSB20MUX MUA10A Yes FSUSB20 10-Lead Molded Small Outline Package (MSOP), JEDEC MO-

Pb-Free package per JEDEC J-STD-020B.

MicroPak™ is a trademark of Fairchild Semiconductor Corporation.

Package

Number

Pb-

Free Top Mark Package Description

(DQFN), JEDEC MO-241, 2.5 x 3.0mm

187, 3.0mm Wide

Connection Diagrams Analog Symbol

FSUSB20 Low-Power 1-Port High-Speed USB (480Mbps) Switch

Pad Assignments for MicroPak

OE

2B12B22A

9

8 7 6

10

V

CC

1 3 4

S

2

11B2

1B

5

GND

1A

(Top View)

Pad Assignments for DQFN

V

NC

CC

1

14

1B

NC

1B

1A

2

S

3

1

4

5

2

6

13

OE

12

2B

1

11

NC

10

2B

2

9

2A

87

NCGND

(Top Through View)

1B

1

1B

2

2B

1

2B

2

S

Control

OE

Truth Table

S OE Function

X High Disconnect

Low Low A = B

High Low A = B

Pin Descriptions

Pin Name Description

OE Bus Switch Enable

S Select Input

ABus A

B

1–B2

1A

2A

1

2

Bus B

Pin Assignment for MSOP

10

V

CC

9

OE

8

2B

1

7

2B

2

6

2A

1B

1A

GND

1

S

2

1

3

2

4

5

(Top Through View)

FSUSB20 Rev. 1.0.2 2

Absolute Maximum Ratings

The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The

device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables

are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the

conditions for actual device operation.

Symbol Parameter Min. Max. Unit

V

CC

V

IN

l

IK

I

OUT

I

CC/IGND

T

STG

ESD Human Body Model

Notes:

1. The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are observed.

Supply Voltage −0.5 +4.6 V

DC Switch Voltage −0.5V VCC+0.05 V

S

DC Input Voltage

(1)

−0.5 +4.6

DC Input Diode Current VIN < 0V −50 mA

DC Output Sink Current 50 mA

DC VCC/GND Current ±100 mA

Storage Temperature Range −65 +150 °C

All Pins 7000

I/O to GND 7000

V

FSUSB20 Low-Power 1-Port High-Speed USB (480Mbps) Switch

Recommended Operating Conditions

(2)

Symbol Parameter Min. Max. Unit

V

CC

V

IN

V

OUT

tr,t

T

A

Notes:

2. Unused control inputs must be held HIGH or LOW. They may not float.

Power Supply Operating 3.0 3.6 V

Input Voltage 0 V

Output Voltage 0 V

Input Rise and Fall Time

f

Switch Control Input 0 5

Switch I/O 0 DC

CC

Free Air Operating Temperature −40 +85°°C

V

ns/V

DC Electrical Characteristics

Typical values are at VCC = 3.0V and TA = +25°C.

= −40 °C to +85 °C

T

A

Symbol Parameter Conditions VCC (V)

V

I

OFF

R

ΔR

R

FLAT(ON)

I

CC

Notes:

3. Measured by the voltage drop between A and B pins at the indicated current through the switch. On resistance is determined by the lower of the voltages on the two (A or B) pins.

4. Flatness is defined as the difference between the maximum and minimum value on resistance over the specified range of conditions.

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

IK

HIGH Level Input Voltage 3.0 to

IH

2.0 V

3.6

LOW Level Input Voltage 3.0 to

IL

3.6

Input Leakage Current 0 ≤ VIN ≤ 3.6V 3.6 ±1.0 μA

I

OFF-STATE Leakage Current 0 ≤ A, B ≤ V

Switch On Resistance

ON

Delta R

ON

(3)

CC

VIN = 0.8V, ION = 8mA 3.0 5.0 7.0 Ω

= 3.0V, ION = 8mA 3.0 4.5 6.5 Ω

V

IN

VIN = 0.8V, VIN = 0V–1.5V,

3.6 ±1.0 μA

3.0 0.3 Ω

ION = 8mA

On Resistance Flatness

Quiescent Supply Current VIN = VCC or GND,

(4)

I

= 8mA 3.0 1.0 Ω

OUT

3.6 1.0 μA

= 0

I

OUT

Max.

0.8 V

UnitsMin. Typ.

FSUSB20 Low-Power 1-Port High-Speed USB (480Mbps) Switch

AC Electrical Characteristics

Typical values are at VCC = 3.3V and TA = +25°C.

Symbol Parameter Conditions VCC (V)

t

OFF

t

O

X

TAL K

BW −3dB Bandwidth R

ON

Turn ON Time

VB = 0.8V 3.0 to 3.6 4.8 7.0 ns Figure 5

S-to-Bus B

Turn OFF Time

VB = 0.8V 3.0 to 3.6 2.2 4.0 ns Figure 5

S-to-Bus B

Propagation Delay CL = 10pF 3.0 to 3.6 0.25 ns Figure 10

PD

Non-Adjacent

IRR

OFF-Isolation

Non-Adjacent Channel Crosstalk

f = 250MHz,

= 50Ω

R

L

f = 250MHz,

= 50Ω,

R

L

= 50Ω, CL = 0pF 3.0 to 3.6 750 MHz Figure 9

L

= 50Ω, CL = 5pF 435

R

L

3.0 to 3.6 −26.0 dB Figure 7

3.0 to 3.6 −45.0 dB Figure 8

= −40°C to +85°C

T

A

Max.

Units

Figure

NumberMin. Typ.

Figure 6

FSUSB20 Low-Power 1-Port High-Speed USB (480Mbps) Switch

USB Related AC Electrical Characteristics

Typical values are at VCC = 3.3V and TA = +25°C.

Symbol Parameter Conditions V

t

SK(O)

Channel-to-Channel

CL = 10pF 3.0 to 3.6 0.051 ns Figure 10

CC

Skew

t

SK(P)

Skew of Opposite

CL = 10pF 3.0 to 3.6 0.020 ns Figure 10 Transition of the Same Output

T

Total Jitter RL = 50Ω, CL = 10pF

J

= tF = 750ps at

t

R

3.0 to 3.6 0.170 ns

480Mbps

Capacitance

Typical values are at VCC = 3.3V and TA = +25°C.

Symbol Parameter Conditions

C

ON

C

OFF

Control Pin Input Capacitance VCC = 0V 2.5 pF

IN

A/B ON Capacitance VCC = 3.3V, OE = 0V 12.0 pF

Port B OFF Capacitance VCC and OE = 3.3V 4.0 pF

(V)

= −40°C to +85°C

T

A

= −40°C to +85°C

T

A

Units

Figure

NumberMin. Typ. Max.

Figure 11

UnitsTyp.

Typical Characteristics

FSUSB20 Low-Power 1-Port High-Speed USB (480Mbps) Switch

0

-1

-2

-3

-4

-5

Gain (dB)

-6

-7

-8 1 10 100 1000 10000

Frequency Response

CL = 0pF, VCC = 3.3V

Figure 1. Gain vs. Frequency

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

Off Isolation (dB)

-100

-110

-120 1 10 100 1000

V

BIAS

Frequency (MHz)

Frequency Response

Frequency (MHz)

= 0.5V, VCC = 3.3V

Figure 2. OFF Isolation