© 2010 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FSUSB74 • Rev. 1.0.2

2

Pin Configurations

Figure 2. UMLP Analog Symbol

Figure 3. UMLP (Top View)

Figure 4. MLP (Top View)

Pin Descriptions

Pin #

Name

Type

Description

1

GND

Ground

Ground

2

D+

I/O

D+ common port (HS or FS USB)

3

D-

I/O

D- common port (HS or FS USB)

4

Power Supply Supply Voltage

5

SEL1

Input

Path Selection Control Input (see truth table below)

6

SEL0

Input

Path Selection Control Input (see truth table below)

7

HSD3-

I/O

D- from fourth source path (HS or FS USB)

8

HSD3+

I/O

D+ from fourth source path (HS or FS USB)

9

HSD2-

I/O

D- from third source path (HS or FS USB)

10

HSD2+

I/O

D+ from third source path (HS or FS USB)

11

HSD1+

I/O

D+ from second source path (HS or FS USB)

12

HSD1-

I/O

D- from second source path (HS or FS USB)

13

HSD0+

I/O

D+ from first source path (HS or FS USB)

14

HSD0-

I/O

D- from first source path (HS or FS USB)

15

/OE

Input

Enable Control Input (see truth table below)

16

NC

No Connect

Truth Table

/OE

SEL1

SEL0

Function

1

X

X

D+, D- Switch Paths Open

0

0

0

D+=HSD0+, D-=HSD0-

0

0

1

D+=HSD1+, D-=HSD1-

0

1

0

D+=HSD2+, D-=HSD2-

0

1

1

D+=HSD3+, D-=HSD3-

HSD0+

HSD1+

HSD3+

D+

HSD0–

HSD1–

SEL0

D–

SEL1

HSD2+

HSD2 –

HSD3 –

/OE

Control

1

5

6

7

8

9

10

11

2

3

12

16

15

14

13

4

NC

SEL1

GND

SEL0

D+

D-

V

CC

HSD3- HSD3+

HSD2-

HSD2+

HSD1-

HSD1+

HSD0- HSD0+

/OE

5

6

7

8

9

10

11

2

3

12

16

15

14

13

4

NC

SEL1

GND

SEL0

D+

D-

V

CC

HSD3- HSD3+

HSD2-

HSD2+

HSD1-

HSD1+

HSD0- HSD0+

/OE

1