6

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

Logic input waveform is inverted for switches that have the opposite

logic sense.

FIGURE 2A. MEASUREMENT POINTS

capacitance.

FIGURE 2B. TEST CIRCUIT

FIGURE 2. CHARGE INJECTION

50%

90%

3V

0V

0V

LOGIC

INPUT

SWITCH

INPUT

SWITCH

OUTPUT

90%

V

OUT

V

(NO or NC)

R

L

R

L

R

ON

()

+

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

=

SWITCH

INPUT

LOGIC

INPUT

COM

NO or NC

IN

300

Ω

35pF

GND

V+

C

V-

C

C

ON

OFF

ON

Q =

SWITCH

OUTPUT

LOGIC

INPUT

3V

0V

GND

COM

NO

V+

C

LOGIC

INPUT

IN

C

V-

COM

NC

ISL8391, ISL8392, ISL8393