TLV3501-Q1
SBOS533A –SEPTEMBER 2010–REVISED SEPTEMBER 2010
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High-Speed Window Comparator
A window comparator circuit is used to determine when a signal is between two voltages. The TLV3501-Q1 can
readily be used to create a high-speed window comparator. VHI is the upper voltage threshold, and VLO is the
lower voltage threshold. When VIN is between these two thresholds, the output in Figure 19 is high. Figure 20
shows a simple means of obtaining an active low output. Note that the reference levels are connected differently
between Figure 19 and Figure 20. The operating voltage range of either circuit is 2.7 V to 5.5 V.
space
VLO
VHI
TLV3501-Q1a
TLV3501-Q1a
VIN
VOUT
VIN
VOUT
SN74AHC00
SN74LVC1G02
TLV3501-Q1b
TLV3501-Q1b
VHI
VLO
V
V
VOUT
VOUT
VIN
VIN
VHI
VHI
VLO
VLO
Time
Time
Figure 19. Window Comparator: Active High
Figure 20. Window Comparator: Active Low
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