isl54205b Intersil Corporation, isl54205b Datasheet - Page 8

• Manufacturer Part Number: isl54205b
• Description: Mp3/usb 2.0 High Speed Switch With Negative Signal Handling
• Manufacturer: Intersil Corporation

Test Circuits and Waveforms
Repeat test for all switches.
IMPEDANCE
ANALYZER
OUT+
OUT-
DIN+
DIN-
FIGURE 5. CAPACITANCE TEST CIRCUIT
FIGURE 7A. MEASUREMENT POINTS
90%
10%
90%
10%
t
t
t
fi
f0
ri
t
50%
50%
ro
AUDIO OR USB
COMx
50%
8
50%
90%
10%
t
10%
90%
skew_i
CTRL
t
skew_o
GND
(Continued)
V
DD
V
BUS
C
V
V
BUSL
BUSH
FIGURE 7. SKEW TEST
OR
ISL54205B
|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.
Signal direction through switch is reversed, worst case values
are recorded. Repeat test for all switches.
|tskew_i| Change in Skew through the Switch for Input Signals.
SIGNAL
GENERATOR
DIN+
ANALYZER
DIN-
V
BUSH
FIGURE 6. AUDIO CROSSTALK TEST CIRCUIT
15.8Ω
15.8Ω
143Ω
0V OR FLOAT
143Ω
R
L
FIGURE 7B. TEST CIRCUIT
V
COM-
COM+
CTRL
BUS
V
V
GND
COMx
L OR R
BUS
DD
CTRL
C
GND
R OR L
V
D+
D-
DD
COMx
C
September 25, 2007
C
C
L
L
32Ω
OUT+
OUT-
45Ω
45Ω
FN6557.0
NC