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| ISL54222_09 Datasheet, PDF (5/15 Pages) Intersil Corporation – High-Speed USB 2.0 (480Mbps) Multiplexer | |||
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ISL54222
Test Circuits and Waveforms
VDD
LOGIC
INPUT
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
HSDxx
SEL
VIN
GND
Dx
OE
VOUT
RL
CL
Repeat test for all switches. CL includes fixture and stray
capacitance.
VOUT
=
V (INPUT)
---------R-----L---------
RL + rON
FIGURE 1A. MEASUREMENT POINTS
FIGURE 1. SWITCHING TIMES
FIGURE 1B. TEST CIRCUIT
VDD C
LOGIC
INPUT
VDD
0V
SWITCH
OUTPUT
VOUT 0V
90%
VINPUT
VIN
HSD2x
HSD1x
SEL
GND
Dx
OE
VOUT
RL
CL
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 = V1/40mA
VHSDX
HSDx
40mA
V1
Dx
GND
SEL OV OR VDD
OE
Repeat test for all switches.
FIGURE 3. rON TEST CIRCUIT
5
FN6835.1
May 27, 2009
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