ISL54217_14 Datasheet, PDF (8/24 Pages) Intersil Corporation – USB 2.0 High-Speed x 2 Channels/Stereo Audio Dual SP3T (Dual 3-to-1 Multiplexer)

ISL54217
Test Circuits and Waveforms (Continued)
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
V_DD
C
CTRL
AUDIO OR USB
IMPEDANCE
ANALYZER
V_Cx
COMx
GND
V_CxL OR
V_CxH
Repeat test for all switches.
FIGURE 5. CAPACITANCE TEST CIRCUIT
8
Repeat test for all switches.
FIGURE 4. USB r_ON TEST CIRCUIT
V_DD
C
SIGNAL
GENERATOR
CTRL
L OR R
COMx
32Ω
V_Cx
0V OR FLOAT
COMx
R or L
ANALYZER
NC
GND
32Ω
FIGURE 6. AUDIO CROSSTALK TEST CIRCUIT
FN6817.4
June 17, 2010