ISL84781 Intersil Corporation, ISL84781 Datasheet - Page 5

• Manufacturer Part Number: ISL84781
• Description: 8 to 1 Analog Multiplexer
• Manufacturer: Intersil Corporation

Test Circuits and Waveforms
Logic input waveform is inverted for switches that have the opposite
logic sense.
Logic input waveform is inverted for switches that have the opposite
logic sense.
FIGURE 1C. ADDRESS t
OUTPUT
SWITCH
OUTPUT
SWITCH
FIGURE 1A. INHIBIT t
LOGIC
INPUT
OUTPUT
SWITCH
LOGIC
INPUT
LOGIC
INPUT
V
OUT
VNO0
VNO0
VNO7
FIGURE 2A. Q MEASUREMENT POINTS
0V
V+
V+
0V
0V
Q = ΔV
OFF
t
OFF
OUT
x C
ON
TRANS
t
TRANS
L
50%
50%
/t
OFF
ON
5
MEASUREMENT POINTS
90%
t
MEASUREMENT POINTS
TRANS
10%
t
ON
V
V
OUT
OUT
0V
ΔV
OFF
OUT
FIGURE 2. CHARGE INJECTION
FIGURE 1. SWITCHING TIMES
t
t
t
t
r
f
r
f
90%
< 5ns
< 5ns
90%
< 5ns
< 5ns
V+
0V
ISL84781
Repeat test for other switches. C
capacitance.
Repeat test for other switches. C
capacitance.
Repeat test for other switches.
V
LOGIC
VNO0
INPUT
LOGIC
VNO0
INPUT
G
C
FIGURE 1D. ADDRESS t
FIGURE 1B. INHIBIT t
C
CHANNEL
SELECT
R
0Ω
G
FIGURE 2B. Q TEST CIRCUIT
V
V
OUT
OUT
NO0
NO1-NO7
INH
NO0
ADD2
ADD2-0
NOx
ADD1
ADD0
NO1-NO7
V+
V+
V+
=
=
C
V
V NOx
C
C
GND
GND
NOx
GND
L
L
ON
includes fixture and stray
includes fixture and stray
TRANS
ADD2-0
------------------------------
R
------------------------------
R
/t
INH
L
OFF
L
COM
INH
COM
COM
+
+
R
R
R
R
L
TEST CIRCUIT
L
(
(
TEST CIRCUIT
LOGIC
ON
INPUT
ON
)
)
V
R
50Ω
V
R
50Ω
OUT
L
OUT
L
1000pF
C
July 31, 2006
L
35pF
C
FN6095.3
35pF
V
C
L
OUT
L