HA12207NT データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HA12207NT

Audio Signal Processor for Cassette Deck

Hitachi -> Renesas Electronics 

HA12207NT

Operating Mode Control

HA12207NT provides fully electronic switching circuits. And each operating mode control is controlled by

parallel data (DC voltage).

Table 2 shows the control voltage of each control input pin.

Table 2 Control Voltage (Vth)

Pin No.

16, 17

Lo

0.0 to 1.0

Hi

4.0 to V

CC

Unit

V

Test Condition

Input Pin

Measure

V

18

Note:

0.0 to 3.0

4.0 to VCC

V

1. Each pin is pulled down with 100kΩ internal resistor. 16 to 18 pins are low-level when each pin is

open.

2. Over shoot level and under shoot level of input signal must be the standardized.

(High: Less than VCC, Low: More than –0.2V)

Block Diagram

Figure 2 shows the block diagram.

As this IC is built-in REC return switch, the configuration system can be simple system using a few

external component and the REC/PB head.

As this IC adopted Hi-z SW of REC-EQ output and the input mute system, it realizes REC mute

attenuation and pop-noise reduction securing in REC mute.

About these logics, please look at the Parallel Data Format.

B head

A head

RECOUT

2

4

5

PB IN(B)

8

PB IN(A)

7

–

+

Hi-Z SW

RETURN SW

B

+

A

–

Vref

10

REC - EQ

13

Figure 2 Block Diagram (Lch)

REC IN

21

PBOUT

15

Normal Speed

PB - A

Rev.3, Jun. 1999, page 8 of 27

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