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| ISL54211_14 Datasheet, PDF (6/19 Pages) Intersil Corporation – MP3/USB 2.0 High Speed Switch with Negative Signal Handling/Click and Pop Suppression | |||
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ISL54211
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
VDD
C
VDD
C
rON = V1/40mA
VL OR VR
CTRL
L OR R
40mA
V1
COMx
GND
0V OR
IN FLOAT
rON = V1/ICOM
VD- OR VD+
CTRL
D- OR D+
ICOM
V1
COMx
GND
IN VDD
Repeat test for all switches.
FIGURE 2. AUDIO rON TEST CIRCUIT
Repeat test for all switches.
FIGURE 3. USB rON TEST CIRCUIT
6
FN6662.1
August 25, 2008
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