TSM9117 TOUCHSTONE [Touchstone Semiconductor Inc], TSM9117 Datasheet - Page 15

• Manufacturer Part Number: TSM9117
• Description: 1.6V Nanopower Comparators with/without Internal References
• Manufacturer: TOUCHSTONE [Touchstone Semiconductor Inc]

Figure 5: A Simple Zero-Crossing Detector
A Zero-Crossing Detector
To configure a zero-crossing detector using a
TSM9119 is illustrated in Figure 5. In this example,
the TSM9119’s inverting input is connected to
ground and its noninverting input is connected to a
100mV
changes state as the signal at the noninverting input
crosses 0V.
TSM9117_20DS r1p0
P-P
signal source. The TSM9119’s output
Figure 6: A 5V-to-3V Logic Level Translator
A Logic-Level Translator
Logic-level translation between two different voltage
systems is easy using the TSM9120 as shown in
Figure 6. This application circuit converts 5V logic to
3V logic levels. In this case, the TSM9120 is
powered by a +5V system and the external pullup
resistor for the TSM9120’s open-drain output is
connected to a +3V system. This configuration
allows the full 5V logic swing without creating
overvoltage on the 3V logic inputs. For 3V to 5V
logic-level translations, simply interchange the +3V
supply voltage connection on the comparator’s V
and the +5V supply voltage to the external pullup
resistor
TSM9117-TSM9120
Page 15
RTFDS
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