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| ISL54209 Datasheet, PDF (8/19 Pages) Intersil Corporation – MP3/USB 2.0 High Speed Switch with Negative Signal Handling and Low Power Shutdown | |||
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ISL54209
Test Circuits and Waveforms
VINH
LOGIC
INPUT
VINL
SWITCH
INPUT
VINPUT
SWITCH
OUTPUT 0V
50%
tOFF
VOUT
90%
tON
tr < 20ns
tf < 20ns
90%
VDD
C
VINPUT
SWITCH
INPUT
CTRL
AUDIO OR USB
IN
COMx
VIN
GND
VOUT
RL
CL
50Ω 10pF
Logic input waveform is inverted for switches that have the
opposite logic sense.
Repeat test for all switches. CL includes fixture and stray
capacitance.
VOUT
=
V (INPUT)
---------R-----L---------
RL + rON
FIGURE 1A. MEASUREMENT POINTS
FIGURE 1B. TEST CIRCUIT
FIGURE 1. SWITCHING TIMES
LOGIC
INPUT
VINH
VINL
VOUT
SWITCH
OUTPUT
0V
VDD C
90%
VINPUT
CTRL
D- OR D+
L OR R
IN
COMx
VOUT
RL
CL
50Ω
10pF
VIN
GND
tD
FIGURE 2A. MEASUREMENT POINTS
Repeat test for all switches. CL includes fixture and stray
capacitance.
FIGURE 2B. TEST CIRCUIT
FIGURE 2. BREAK-BEFORE-MAKE TIME
VDD
C
VDD
C
rON = V1/40mA
VL OR VR
CTRL
L OR R
40mA
V1
COMx
GND
IN 0V OR FLOAT
rON = V1/40mA
VD- OR VD+
CTRL
D- OR D+
40mA
V1
COMx
GND
IN VDD
Repeat test for all switches.
FIGURE 3. AUDIO rON TEST CIRCUIT
8
Repeat test for all switches.
FIGURE 4. USB rON TEST CIRCUIT
FN6627.4
June 10, 2010
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