ISL54206A Datasheet, PDF (7/19 Pages) Intersil Corporation – MP3/USB 2.0 High Speed Switch with Negative Signal Handling

ISL54206A
Test Circuits and Waveforms
LOGIC
INPUT
VDD
0V
SWITCH
INPUT ^VINPUT
SWITCH
OUTPUT
0V
50%
tOFF
VOUT
90%
tON
tr <20ns
tf <20ns
90%
VDD
C
CTRL
VINPUT
SWITCH
AUDIO or USB
INPUT
IN
COMx
VIN
GND
VOUT
RL
50Ω
CL
10pF
Logic input waveform is inverted for switches that have the
opposite logic sense.
Repeat test for all switches. C_L includes fixture and stray
capacitance.
V_OUT
=
V _(INPUT)
---------^R-----^L---------
R_L + r_ON
FIGURE 1A. MEASUREMENT POINTS
FIGURE 1B. TEST CIRCUIT
FIGURE 1. SWITCHING TIMES
LOGIC
INPUT
VDD
0V
VOUT
SWITCH
OUTPUT
0V
VDD
C
90%
VINPUT
CTRL
D- or D+
L or R
IN
COMx
VOUT
RL
50Ω
CL
10pF
tD
VIN
GND
FIGURE 2A. MEASUREMENT POINTS
Repeat test for all switches. C_L includes fixture and stray
capacitance.
FIGURE 2B. TEST CIRCUIT
FIGURE 2. BREAK-BEFORE-MAKE TIME
VDD
C
VDD
C
R_ON = V1/100mA
VL OR R
CTRL
L OR R
V1
IN
0V
100mA
COMx
GND
R_ON = V1/40mA
CTRL
D- OR D+
VD- OR D+
V1
40mA
COMx
GND
IN VDD
Repeat test for all switches.
FIGURE 3. AUDIO R_ON TEST CIRCUIT
7
Repeat test for all switches.
FIGURE 4. USB R_ON TEST CIRCUIT
FN6515.2
September 30, 2010