ISL54217_09 Datasheet, PDF (7/21 Pages) Intersil Corporation – USB 2.0 High-Speed x 2Channels/Stereo Audio Dual SP3T (Dual 3-to-1 Multiplexer)

ISL54217
Test Circuits and Waveforms
V_C0,C1
LOGIC
INPUT
V_C0,C1
50%
t_OFF
t_r < 20ns
t_f < 20ns
SWITCH
INPUT
V_INPUT
SWITCH
OUTPUT _0V
V_OUT
90%
t_ON
90%
Logic input waveform is inverted for switches that have the opposite
logic sense.
V_DD
C
V_INPUT
SWITCH
INPUT
C0,C1
COMx
LOGIC
INPUT
GND
V_OUT
R_L
C_L
50Ω 10pF
Repeat test for all switches. C_L includes fixture and stray
capacitance.
V_OUT
=
V _(INPUT)
---------^R-----^L---------
R_L + r_ON
FIGURE 1A. ADDRESS t_TRANS MEASUREMENT POINTS
FIGURE 1B. ADDRESS t_TRANS TEST CIRCUIT
FIGURE 1. SWITCHING TIMES
V_{DD C}
V_C0
LOGIC
INPUT
V_C1
V_OUT
SWITCH
OUTPUT
0V
2D- OR 2D+
V_INPUT
1D- OR 1D+
L OR R
C0, C1
COMx
V_OUT
R_L
C_L
50Ω
10pF
90%
LOGIC
INPUT
t_D
GND
FIGURE 2A. MEASUREMENT POINTS
Repeat test for all switches. C_L includes fixture and stray
capacitance.
FIGURE 2B. TEST CIRCUIT
FIGURE 2. BREAK-BEFORE-MAKE TIME
V_DD
C
V_DD
C
r_ON = V₁/60mA
COMx
V_{L OR R}
C0
V₁
C1
60mA
L OR R
GND
V_COH
V_C1H
r_ON = V₁/40mA
V_{D- OR D+}
D- OR D+
40mA
V₁
COMx
GND
C0 ^VC0L ^AND
C1 ^{VC1H OR}
V_C0H AND
V_C1L
Repeat test for all switches.
FIGURE 3. AUDIO r_ON TEST CIRCUIT
Repeat test for all switches.
FIGURE 4. USB r_ON TEST CIRCUIT
7
FN6817.3
May 4, 2009