ISL54227

8

FN7593.0

July 2, 2010

Application Block Diagram

FIGURE 5A. MEASUREMENT POINTS

FIGURE 5B. TEST CIRCUIT

FIGURE 5. SKEW TEST

DIN+

DIN-

OUT+

OUT-

50%

50%

90%

10%

10%

10%

10%

90%

90%

50%

90%

50%

OUT+

COM+

D-

GND

C

D+

COM-

OUT-

DIN+

DIN-

|tro - tri| Delay Due to Switch for Rising Input and Rising Output Signals.

|tfo - tfi| Delay Due to Switch for Falling Input and Falling Output Signals.

|tskew_0| Change in Skew through the Switch for Output Signals.

|tskew_i| Change in Skew through the Switch for Input Signals.

15.8

Ω

15.8

Ω

143

Ω

143

Ω

45

Ω

45

Ω

OE

PORTABLE MEDIA DEVICE

ISL54227

USB

TRANSCEIVER

HIGH-SPEED

COM-

COM+

INT

GND

D+

D-

VDD

OE

µCONTROLLER

D-

D+

GND

OR

FULL-SPEED

OVP

DET

4MΩ

>1MΩ

3.6V

ALM

LP

LOGIC

4MΩ

500Ω

3.3V

CONTROL