Datasheet

2 V/DIV
2.00 µs/DIV
V
S
= 5V
A
V
= +1
V
IN
= 3.5V
PP
V
OUT
SD
SD
R
S
10k
+
-
Q1
LMV118
5V
V
IN
SHUTDOWN
INPUT
V
OUT
V
-
LMV116, LMV118
SNOSA87B –OCTOBER 2003–REVISED MAY 2013 www.ti.com
To keep the output at or near ground during shutdown when there is no other device to hold the output low, a
switch (transistor) could be used to shunt the output to ground. Figure 24 shows a circuit where a NPN bipolar is
used to keep the output near ground (∼80mV):
Figure 24. Active Pull-Down Schematic
Figure 25 shows the output waveform.
Figure 25. Output Held Low by Active Pull-Down Circuit
If bipolar transistor power dissipation is not tolerable, the switch could be by a N-channel enhancement mode
MOSFET.
2.7V SINGLE SUPPLY 2:1 MUX
The schematic show in Figure 26 will function as a 2:1 MUX operating on a single 2.7V power supply, by utilizing
the shutdown feature of the LMV118.
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