ISL8394

FN6038 Rev 3.00

Page 6 of 11

March 13, 2006

Test Circuits and Waveforms

Logic input waveform is inverted for switches that have the opposite

logic sense.

FIGURE 1A. MEASUREMENT POINTS

FIGURE 1B. TEST CIRCUIT

FIGURE 1. SWITCHING TIMES

Logic input waveform is inverted for switches that have the opposite

logic sense.

FIGURE 2A. MEASUREMENT POINTS

Repeat test for all switches. CL includes fixture and stray

capacitance.

FIGURE 2B. TEST CIRCUIT

FIGURE 2. CHARGE INJECTION

FIGURE 3A. MEASUREMENT POINTS

capacitance.

FIGURE 3B. TEST CIRCUIT

FIGURE 3. BREAK-BEFORE-MAKE TIME

50%

75%

3V

0V

LOGIC

INPUT

SWITCH

OUTPUT

75%

25%

25%

V(NO or NC)



+

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

=

SWITCH

INPUTS

LOGIC

INPUT

COM

NO

IN

300



35pF

GND

V+

C

V-

C

C

NC

C

ON

OFF

ON

Q =

SWITCH

OUTPUT

LOGIC

INPUT

3V

0V

GND

COM

NO OR NC

V+

C

LOGIC

INPUT

IN

C

V-

80%

3V

0V

LOGIC

INPUT

SWITCH

OUTPUT

0V

LOGIC

INPUT

IN

COM

35pF

300



NO

NC

V+

GND

C

C