HA12177 データシートの表示（PDF） - Hitachi -> Renesas Electronics

部品番号

コンポーネント説明

メーカー

HA12177

Audio Signal Processor for Car Deck and Cassette Deck (Dolby B/C-type NR with PB Amp)

Hitachi -> Renesas Electronics 

HA12173 Series

Table 3 Switching Truth Table

Pin No.

Low

High

13

B - NR

C - NR

14

NR - OFF

NR - ON

15

PB

REC

16

TAPE

RADIO

17

120 µ (NORMAL)

70 µ (METAL or CHROME)

18

FORWARD

REVERSE

19

SER (FF or REV)

REP (NORMAL SPEED)

Notes: 1. Voltages shown above are determined by internal circuits of LSI when take pin 20 (DGND pin) as

reference pin. On split supply use, same V can be offered by connecting DGND pin to GND

TH

pin.

This means that it can be controlled directly by microprocessor. But power supply should be

over ±5 V, notwithstanding the prescription of table 1.

2. Each pins are on pulled down with 100 kΩ internal resistor.

Therefore, it will be low-level when each pins are open.

3. Over shoot level and under shoot level of input signal must be the standardized (High: 5.3 V,

Low: –0.2 V)

4. When connecting microcomputer or Logic-IC with HA12173 series directly, there is apprehension

of rush-current under some transition timming of raising voltage or falling voltage at VCC ON/OFF.

On using, connect protective resistors of 10 to 22 kΩ to all the control pins. It is shown is test

circuit on this data sheet. And pins fixed to low level should be preferably open.

5. Pay attention not to make digital GND voltage lower than GND voltage.

Rev.1, Nov. 1992, page 13 of 66

Share Link: