Datasheet

MAX4670
Integrated T1/E1/J1 Short-Haul and
Long-Haul Protection Switch
______________________________________________________________________________________ 11
t
r
< 5ns
t
f
< 5ns
50%
V
INL
LOGIC
INPUT
R
L
50
Ω
COM_
GND
IN_
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
V
OUT
= V
N_ (
R
L
)
R
L
+ R
ON
WHERE, V
N_
IS V
NC_
OR V
NO_
.
V
INH
t
OFF
0V
NO_
OR NC_
V
NO_
OR
V
NC_
0.9
×
V
0UT
0.9
×
V
OUT
t
ON
V
OUT
SWITCH
OUTPUT
LOGIC
INPUT
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
V+
C
L
35pF
V
OUT
MAX4670
0.1
µ
F
V+
Figure 2. Switching Time
50%
V
INH
V
INL
LOGIC
INPUT
V
OUT
0.9
×
V
OUT
t
D
LOGIC
INPUT
R
L
50
Ω
GND
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
NO_
IN_
NC_
V
OUT
V+
C
L
35pF
V
NO_
OR
V
NC_
COM_
MAX4670
0.1
µ
F
V+
Figure 3. Break-Before-Make Intervals
Test Circuits/Timing Diagrams
V
OUT
IN_
OFF
ON
OFF
∆
V
OUT
Q = (∆V
OUT
)(C
L
)
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
OFF
ON
OFF
IN_
MAX4670
V
GEN
GND
COM_
C
L
V
OUT
V+
NC_
OR NO_
V
INL
TO V
INH
R
GEN
IN_
0.1
µ
F
V+
Figure 4. Charge Injection