May 2008

PCS3P73U00A

rev 0.3

USB 2.0 Peak EMI reduction IC

6 of 13

Notice: The information in this document is subject to change without notice.

Deviation Vs Resistance (MR=0)

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

0

5

10

15

20

25

30

35

40

Resistance (KOhms)

12MHz_FS=0

15MHz_FS=0

24MHz_FS=0

24MHz_FS=1

25MHz_FS=0

25MHz_FS=1

30MHz_FS=1

48MHz_FS=1

USB 2.0 Compliance

-4dB

-7dB

-2dB

Deviation Vs Resistance (MR=1)

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

0

10

2030

40506070

8090

100

Resistance (KOhms)

12MHz_FS=0

15MHz_FS=0

24MHz_FS=0

24MHz_FS=1

25MHz_FS=0

25MHz_FS=1

30MHz_FS=1

48MHz_FS=1

USB Compliance

-4dB

-7dB

-2dB

VDD=3.3V; MR=0

Frequency

(MHz)

FS

(MHz)

SSEXTR*

Resistance (KΩ)

12

0

10

15

0

8.87

0

6.81

24

1

13.7

0

6.98

25

1

13.7

30

1

12.1

48

1

10

VDD=3.3V; MR=1

Frequency

(MHz)

FS

(MHz)

SSEXTR*

Resistance (KΩ)

12

0

17.8

15

0

13

0

6.49

24

1

39.2

0

6.49

25

1

35.7

30

1

29.4

48

1

19.1

VDD=2.5V; MR=0

Frequency

(MHz)

FS

(MHz)

SSEXTR*

Resistance (KΩ)

12

0

10

15

0

8.87

24

1

13.7

25

1

13.7

30

1

12.1

48

1

10

VDD=2.5V; MR=1

Frequency

(MHz)

FS

(MHz)

SSEXTR*

Resistance (KΩ)

12

0

17.8

15

0

13

24

1

39.2

25

1

35.7

30

1

29.4

48

1

19.1

Fig2: Deviation VsResistance

for USB 2.0 Compliance (MR=0)

Fig3: Deviation VsResistance

for USB 2.0 Compliance (MR=1)

Note:

* Standard 1% tolerance Resistors

Device to Device variation of Deviation is ± 10%