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| ISL54225_10 Datasheet, PDF (7/18 Pages) Intersil Corporation – High-Speed USB 2.0 (480Mbps) Multiplexer with Overvoltage Protection (OVP) | |||
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ISL54225
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
VINPUT
SWITCH
INPUT
HSDxx
SEL
VIN
GND
Dx
OE
VOUT
RL
CL
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
LOGIC
INPUT
VDD
0V
SWITCH
OUTPUT
VOUT
0V
90%
VINPUT
VIN
HSD2x
HSD1x
SEL
GND
Dx
OE
VOUT
RL
CL
50Ω
10pF
tD
Repeat test for all switches. CL includes fixture and stray
capacitance.
FIGURE 2A. MEASUREMENT POINTS
FIGURE 2B. TEST CIRCUIT
FIGURE 2. BREAK-BEFORE-MAKE TIME
VDD
C
rON = V1/17mA
VHSDx
HSDx
17mA
V1
Dx
GND
SEL 0V OR VDD
OE
Repeat test for all switches.
FIGURE 3. rON TEST CIRCUIT
7
FN7627.0
July 2, 2010
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