HA12231FP
Operating Mode Control
HA12231FP provides fully electronic switching circuits. And each operating mode control are controlled
by parallel data (DC voltage).
When a power supply of this IC is cut off, for a voltage, in addition to a mode control terminal even though
as do not destruct it, in series for resistance.
Table 2 Threshold Voltage (VTH)
Pin No.
8, 9, 10
Lo
−0.2 to 1.0
Hi
3.5 to V
CC
Unit
V
Test Condition
Input Pin Measure
V
Table 3 Switching Truth Table
Pin No.
Pin Name
Low
High
8
120/70
120 µ (Normal)
70 µ (Metal or Chrome)
9
Mute
Mute OFF
Mute ON
10
FOR/REV
Forward
Reverse
Notes: 1. Each pins are on pulled down with 100 kΩ internal resistor.
Therefore, it will be low-level when each pins are open.
2. Over shoot level and under shoot level of input signal must be the standardized.
(High: VCC, Low: −0.2 V)
3. Reducing pop noise is so much better for 10 kΩ to 22 kΩ resisitor and 1 µF to 22 µF capacitor
shown figure 2.
Input Pin 10 to 22 kΩ
+ 1 to 22 µF
MPU
Figure 2 Interface for Reduction of Pop Noise
Rev.1, Jan. 2001, page 9 of 9