ISL54227 Intersil, ISL54227 Datasheet - Page 7

• Manufacturer Part Number: ISL54227
• Description: High-Speed USB 2.0 (480Mbps) DPST Switch
• Manufacturer: Intersil

Test Circuits and Waveforms
Logic input waveform is inverted for switches that have the
opposite logic sense.
Repeat test for all switches.
IMPEDANCE
ANALYZER
OUTPUT
SWITCH
SWITCH
LOGIC
INPUT
INPUT
FIGURE 3. CAPACITANCE TEST CIRCUIT
FIGURE 1A. MEASUREMENT POINTS
V
VDD
INPUT
0V
0V
t
ON
50%
COMx
Dx
7
90%
t
Repeat test for all switches.
OFF
GND
V
V
HSDX
OUT
V
DD
r
ON
OE
= V
17mA
FIGURE 1. SWITCHING TIMES
FIGURE 2. r
C
1
/17mA
t
t
90%
0V OR
VDD
r
f
< 20ns
< 20ns
ISL54227
V
1
COMx
Dx
ON
TEST CIRCUIT
GND
Repeat test for all switches. C
capacitance.
Signal direction through switch is reversed, worst case values
are recorded. Repeat test for all switches.
SIGNAL
GENERATOR
ANALYZER
SWITCH
V
INPUT
DD
VIN
FIGURE 4. CROSSTALK TEST CIRCUIT
OE
V
C
INPUT
R
FIGURE 1B. TEST CIRCUIT
V
VIN
L
V
DD
OUT
COMx
OE
=
V
V
COM+
D-
OE
DD
(INPUT)
L
GND
includes fixture and stray
C
GND
----------------------- -
R
L
Dx
R
+
V
L
r
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DD
ON
COM-
D+
C
50Ω
R
L
V
OUT
July 2, 2010
50Ω
FN7593.0
50pF
C
L
NC