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| ISL54206 Datasheet, PDF (5/13 Pages) Intersil Corporation – MP3/USB 2.0 High Speed Switch with Negative Signal Handling | |||
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ISL54206
Test Circuits and Waveforms
LOGIC
INPUT
VDD
0V
50%
tOFF
tr <20ns
tf <20ns
SWITCH
INPUT
VINPUT
SWITCH
OUTPUT 0V
VOUT
90%
tON
90%
Logic input waveform is inverted for switches that have the opposite
logic sense.
VDD
C
VINPUT
SWITCH
INPUT
CTRL
Audio or USB
IN
VIN
GND
COMx
VOUT
RL
CL
50Ω 10pF
Repeat test for all switches. CL includes fixture and stray
capacitance.
VOUT
=
V (INPUT)
------------R-----L-------------
RL + R(ON)
FIGURE 1A. MEASUREMENT POINTS
FIGURE 1. SWITCHING TIMES
FIGURE 1B. TEST CIRCUIT
VDD C
LOGIC
INPUT
VDD
0V
VINPUT
CTRL
D- or D+
L or R
IN
COMx
VOUT
RL
CL
50Ω
10pF
VOUT
SWITCH
OUTPUT
0V
90%
tD
FIGURE 2A. MEASUREMENT POINTS
VIN
GND
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 = V1/100mA
CTRL
L OR R
VL OR R
V1
IN
OV
100mA
COMx
GND
RON = V1/40mA
VD- OR D+
CTRL
D- OR D+
40mA
V1
COMx
GND
IN VDD
Repeat test for all switches.
FIGURE 3. AUDIO RON TEST CIRCUIT
Repeat test for all switches.
FIGURE 4. USB RON TEST CIRCUIT
5
FN6409.0
December 18, 2006
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