HA12231FP View Datasheet(PDF) - Hitachi -> Renesas Electronics

Part Name

Description

Manufacturer

HA12231FP

Audio Signal Processor for Car Deck (PB 1 Chip)

Hitachi -> Renesas Electronics 

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 VCC

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

9

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