HA17901 Datasheet, PDF (10/16 Pages) Hitachi Semiconductor – Quadruple Comparators

HA17901, HA17339 Series
HA17901 Application Examples
The HA17901 houses four independent comparators in a single package, and operates over a wide voltage
range at low power from a single-voltage power supply. Since the common-mode input voltage range starts
at the ground potential, the HA17901 is particularly suited for single-voltage power supply applications.
This section presents several sample HA17901 applications.
HA17901 Application Notes
1. Square-Wave Oscillator
The circuit shown in figure one has the same structure as a single-voltage power supply astable
multivibrator. Figure 2 shows the waveforms generated by this circuit.
100k
V_CC
4.3k
75pF
C
R
V_CC
–
HA17901
V_CC
+
100k
Vout
100k
100k
Figure 1 Square-Wave Oscillator
(1)
Horizontal: 2 V/div, Vertical: 5 µs/div, V_CC = 5 V
(2)
Horizontal: 5 V/div, Vertical: 5 µs/div, V_CC = 15 V
Figure 2 Operating Waveforms
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