ISL54224 Datasheet, PDF (7/18 Pages) Intersil Corporation – High-Speed USB 2.0 (480Mbps) Multiplexer with Overvoltage Protection (OVP) and Overvoltage Indicator Output

ISL54224
Test Circuits and Waveforms
LOGIC
INPUT
VDD
0V
SWITCH
INPUT
V_INPUT
SWITCH
OUTPUT
0V
50%
t_OFF
V_OUT
90%
t_ON
t_r < 20ns
t_f < 20ns
90%
V_DD
C
SWITCH
INPUT
V_INPUT
OE/ALM
HSDxx
SEL
VIN
GND
V_OUT
Dx
R_L
C_L
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
V_{DD C}
LOGIC
INPUT
VDD
0V
SWITCH
OUTPUT
V_{OUT 0V}
90%
V_INPUT
VIN
OE/ALM
HSD2x
HSD1x
SEL
GND
Dx
V_OUT
R_L
C_L
50Ω
10pF
t_D
Repeat test for all switches. C_L includes fixture and stray
capacitance.
FIGURE 2A. MEASUREMENT POINTS
FIGURE 2B. TEST CIRCUIT
FIGURE 2. BREAK-BEFORE-MAKE TIME
V_DD
C
r_ON = V₁/17mA
V_HSDx
OE/ALM
HSDx
17mA
V₁
Dx
GND
SEL OV OR VDD
Repeat test for all switches.
FIGURE 3. r_ON TEST CIRCUIT
7
FN6969.0
June 7, 2010