8

FN6661.2

March 18, 2010

Test Circuits and Waveforms

Logic input waveform is inverted for switches that have the opposite logic

sense.

FIGURE 1A. MEASUREMENT POINTS

capacitance.

FIGURE 1B. TEST CIRCUIT

FIGURE 1. SWITCHING TIMES

FIGURE 4. CAPACITANCE TEST CIRCUIT

FIGURE 5. AUDIO CROSSTALK TEST CIRCUIT

50%

90%

0V

LOGIC

INPUT

SWITCH

INPUT

SWITCH

OUTPUT

90%

V

OUT

V

(INPUT)

R

L

R

L

r

ON

+

------------------------

=

SWITCH

INPUT

COMx

AUDIO OR USB

50W

10pF

GND

C

CTRL

C

L OR R

COMx

GND

40mA

REPEAT TEST FOR ALL SWITCHES

CTRL

C

D- OR D+

COMx

GND

REPEAT TEST FOR ALL SWITCHES

CTRL

C

GND

AUDIO OR USB

COMx

IMPEDANCE

ANALYZER

REPEAT TEST FOR ALL SWITCHES

CTRL

0V OR FLOAT

ANALYZER

C

L OR R

SIGNAL

GENERATOR

GND

COMx

32

Ω

NC

COMx

R OR L

REPEAT TEST FOR ALL SWITCHES

CTRL

ISL54210