ISL54227_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

ISL54227
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
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
V_BUS
D-
D+
500Ω
VDD
3.6V
>1MΩ
COM-
OVP
DET
COM+
LOGIC
CONTROL
4MΩ
ALM
INT
LP
OE
4MΩ
D-
D+
GND
ISL54227
GND
µCONTROLLER
USB
HIGH-SPEED
OR
FULL-SPEED
TRANSCEIVER
PORTABLE MEDIA DEVICE
8
FN7593.0
July 2, 2010