MAX4670 查看數據表（PDF） - Maxim Integrated
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MAX4670 Datasheet PDF : 20 Pages
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Integrated T1/E1/J1 Short-Haul and
Long-Haul Protection Switch
MAX4670
VNO_
OR
VNC_
LOGIC
INPUT
NO_
OR NC_
IN_
GND
V+ 0.1µF
V+
COM_
VOUT
RL
CL
50Ω
35pF
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
( ) VOUT = VN_
RL
RL + RON
WHERE, VN_ IS VNC_ OR VNO_.
Figure 2. Switching Time
Test Circuits/Timing Diagrams
LOGIC VINH
INPUT VINL
50%
tr < 5ns
tf < 5ns
SWITCH 0V
OUTPUT
tOFF
VOUT 0.9 × V0UT
0.9 × VOUT
tON
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
MAX4670
VNO_
OR
VNC_
LOGIC
INPUT
V+
0.1µF
V+
NC_
COM_
NO_
IN_
GND
VOUT
RL
50Ω
CL
35pF
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
Figure 3. Break-Before-Make Intervals
LOGIC VINH
INPUT
50%
VINL
VOUT
0.9 × VOUT
tD
MAX4670
V+
0.1µF
VGEN
RGEN
NC_
OR NO_
GND
V+
COM_
IN_
VOUT
CL
VINL TO VINH
VOUT
IN_
OFF
∆VOUT
OFF
ON
ON
OFF
OFF
IN_
Q = (∆VOUT)(CL)
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 4. Charge Injection
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