HA17901A_15 Datasheet, PDF (11/18 Pages) Renesas Technology Corp – Quadruple Comparators

HA17901A Series
HA17901A Application Examples
The HA17901A 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 HA17901A is particularly suited for single-voltage power supply applications. This section presents
several sample HA17901A applications.
1. Square-Wave Oscillator
The circuit shown in figure 1 has the same structure as a single-voltage power supply astable multivibrator. Figure
2 shows the waveforms generated by this circuit.
100 k
V_CC
4.3 k
75 pF
V_CC R
−
C
HA17901A
V_CC
+
100 k
Vout
100 k
100 k
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
Rev.1.00 Mar 10, 2006 page 9 of 15