ISL54226 INTERSIL [Intersil Corporation], ISL54226 Datasheet - Page 8

• Manufacturer Part Number: ISL54226
• Description: High-Speed USB 2.0 (480Mbps) DPST Switch with Overvoltage Protection (OVP) and Dedicated Charger Port Detection
• Manufacturer: INTERSIL [Intersil Corporation]

Test Circuits and Waveforms
Application Block Diagram
OUT+
DIN+
DIN-
OUT-
FIGURE 5A. MEASUREMENT POINTS
VBUS
D-
D+
GND
90%
10%
90%
10%
t
t
t
fi
ri
f0
t
50%
50%
ro
50%
COM +
COM -
8
50%
90%
10%
ISL54226
t
10%
90%
skew_i
t
OVP
DET
skew_o
>1MΩ
VDD
3.3V
3.6V
500Ω
GND
CONTROL
LOGIC
FIGURE 5. SKEW TEST
ISL54226
(Continued)
OE/ALM
4MΩ
INT
100kΩ
D+
D-
|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.
3.3V
DIN+
DIN-
V
DD
15.8Ω
15.8Ω
143Ω
143Ω
FIGURE 5B. TEST CIRCUIT
PORTABLE MEDIA DEVICE
COM-
COM+
OE/ALM
µCONTROLLER
TRANSCEIVER
HIGH-SPEED
V
FULL-SPEED
GND
DD
USB
OR
C
D+
D-
C
C
L
L
July 29, 2010
FN7614.0
OUT+
OUT-
45Ω
45Ω