MAX4850 Maxim, MAX4850 Datasheet - Page 3

• Manufacturer Part Number: MAX4850
• Description: The MAX4850/MAX4850H/MAX4852/MAX4852H family of dual SPDT (single-pole/double-throw) switches operate from a single +2V to +5
• Manufacturer: Maxim

Dual SPDT Analog Switches with
Over-Rail Signal Handling
Figure 1. Switching Time
Figure 2. Input/Output Skew Timing Diagram
12
______________________________________________________________________________________
MAX4850_
MAX4852_
LOGIC
INPUT
|t
|t
|t
|t
ro -
fo -
skew_o
skew_i
V
TxD+
TxD-
NO
t
t
fi
ri
|
|
|
|
C
V
DELAY DUE TO SWITCH FOR RISING INPUT AND RISING OUTPUT SIGNALS.
CHANGE IN SKEW THROUGH THE SWITCH FOR INPUT SIGNALS.
DELAY DUE TO SWITCH FOR FALLING INPUT AND FALLING OUTPUT SIGNALS.
CHANGE IN SKEW THROUGH THE SWITCH FOR OUTPUT SIGNALS.
OUT
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
NO_
IN_
= V
GND
NO
V
V
R
C
CC
CC
(
R
s
L
L
= 39Ω
= 50pF
R
+ R
L
ON
)
R
R
s
s
COM_
A
A-
R
L
B-
B
C
C
C
L
L
L
V
OUT
OUTPUT B
OUTPUT B-
INPUT A
INPUT A-
OUTPUT
SWITCH
SWITCH
LOGIC
INPUT
INPUT
Test Circuits/Timing Diagrams
V
V
OUT
CC
0V
0V
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
90%
10%
10%
90%
NORMAL MODE
t
t
50%
V
t
ON
HIZ
t
t
t
ri
fi
ro
50%
fo
CC
50%
50%
50%
+ 0.5V
0.9 x V
HIGH-Z MODE
t
90%
t
skew_i
10%
90%
skew_o
10%
0UT
t
OFF
t
HIZB
0.9 x V
NORMAL MODE
t R < 20ns
t F < 20ns
OUT