Fault-Protected Analog Multiplexers
______________________________________________Test Circuits/Timing Diagrams
+15V
V+
A2
NO1
+10V
A1
NO2-NO7
A0
MAX354 NO8
-10V
VEN EN
COM
GND
50Ω
V-
300Ω
-15V
+15V
V+
A1
NO1B
+10V
A0
NO1A-NO4A
NO4B
-10V
VEN EN
MAX355
COMB
GND
V-
50Ω
300Ω
-15V
VOUT
35pF
VOUT
35pF
LOGIC +3V
INPUT
VEN
0V
VNO1
SWITCH
OUTPUT
VOUT
0V
VNO8
tTRANS
ON
50%
90%
tR < 20ns
tF < 20ns
90%
tTRANS
Figure 1. Transition Time
+15V
VEN EN
V+
NO1
NO2–NO8
A0
A1 MAX354
A2
50Ω
GND
COM
V-
-15V
+15V
+10V
1k
VEN EN
A0
V+ NO1B
+10V
NO1A–NO4A
NO2B–NO4B,
COMA
MAX355
A1
COMB
50Ω
GND
V-
1k
-15V
VOUT
35pF
VOUT
35pF
LOGIC
INPUT
VEN
+3V
0V
tON(EN)
0V
SWITCH
OUTPUT
VOUT
50%
90%
Figure 2. Enable Switching Time
6 _______________________________________________________________________________________
tR < 20ns
tF < 20ns
tOFF(EN)
10%