ISL54226_10 Datasheet, PDF (8/18 Pages) Intersil Corporation – High-Speed USB 2.0 (480Mbps) DPST Switch with Overvoltage Protection (OVP) and Dedicated Charger Port Detection

ISL54226
Test Circuits and Waveforms (Continued)
V_{DD C}
t_ri
DIN+
DIN-
OUT+
OUT-
10%
90%
50%
t_{skew_i}
90% _50%
10%
t_fi
t_ro
90%
10%
90%
50%
t_{skew_o}
50%
t_f0
10%
V_DD
DIN+
DIN-
15.8Ω
143Ω
15.8Ω
143Ω
OE/ALM
COM-
COM+
D-
OUT+
C_L ^45Ω
D+
OUT-
C_L
45Ω
GND
|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.
FIGURE 5A. MEASUREMENT POINTS
FIGURE 5. SKEW TEST
FIGURE 5B. TEST CIRCUIT
Application Block Diagram
3.3V
3.3V
VBUS
500Ω
100kΩ
VDD
3.6V
>1MΩ
INT
LOGIC
CONTROL
OE/ALM
4MΩ
D-
COM -
D-
OVP
DET
D+
COM +
D+
GND
ISL54226
GND
µCONTROLLER
USB
HIGH-SPEED
OR
FULL-SPEED
TRANSCEIVER
PORTABLE MEDIA DEVICE
8
FN7614.0
July 29, 2010