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| ISL76120 Datasheet, PDF (6/13 Pages) Intersil Corporation – Automotive Grade USB 2.0 High/Full Speed Multiplexer | |||
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ISL76120
Test Circuits and Waveforms (Continued)
VDD C
LOGIC
INPUT
VINH
VINL
SWITCH
OUTPUT
VOUT 0V
90%
VINPUT
VIN
EN
FSD1 or FSD2
HSD1 or HSD2
IN
GND
COMx
VOUT
RL
CL
45Ω
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/ICOMx
HSx
VHSX
ICOMx
V1
COMx
GND
IN 1.4V
EN
1.4V
Repeat test for all switches.
FIGURE 3. HSx SWITCH rON TEST CIRCUIT
VDD
C
rON = V1/40mA
FSx
VFSX
V1
IN 0.5V
40mA
COMx
GND EN
1.4V
Repeat test for all switches.
FIGURE 4. FSx SWITCH rON TEST CIRCUIT
6
FN6711.1
May 29, 2008
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