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| ISL54222A Datasheet, PDF (6/17 Pages) Intersil Corporation – High-Speed USB 2.0 (480Mbps) Multiplexer | |||
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ISL54222A
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
500Ω
CL
50pF
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
VINPUT
HSD2x
HSD1x
SEL
Dx
VOUT
RL
500Ω
CL
50pF
10%
VIN
GND
OE
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
6
FN6902.0
May 13, 2009
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