HIT HA12219NT Datasheet

HA12219NT

Audio Signal Processor for Cassette Deck

ADE-207-258A

2nd Edition

July 1998

Description

HA12219NT is silicon monolithic bipolar IC providing PB equalizer, REC equalizer system and each
electronic control switch in one chip.

Functions

• PB equalizer × 2 channel

• REC equalizer × 2 channel

• Each electronic control switch to change REC/PB etc.

• REC MUTE

• REC head return switch

Features

• REC equalizer is very small number of extern al parts, built-in 2 types of frequency characteristics.

• PB equalizer circuit built-in.

• REC /PB are possible with TYPE I/II.

• Controllable from direct micro-computer output.

• Available to reduce substrate-area because of high integration and small external parts.

HA12219NT

Pin Description, Equivalent Circuit (VCC = 12 V, Vref = 5.6 V, Ta = 25°C, No signal,

The value in the table show typical value.)

Pin No. Pin Name Note Equivalent Circuit Pin Description

1V

CC

V = V

CC

2 REC-OUT(L) V = Vref

3 REC-OUT(R)
4 REC-RETURN V = Vref

V’ = Vref

V

CC

GND

I

,

V4

5 pin, 6 pin

V

VCC pin
REC-EQ output

REC return

V

CC

I

GND

5 PB-IN B(L) PB B deck input
6 PB-IN B(R)
7VREF V = Vref

V’ = V

/ 2

CC

V

CC

Reference

10 k

,

V

V

10 k

GND

8 PB-IN A(L) V = Vref

V

CC

PB A deck input

PB-NF

9 PB-IN A(R)

Rev.2, Jul. 1998, page 2 of 29

HA12219NT

Pin Description, Equivalent Circuit (VCC = 12 V, Vref = 5.6 V, Ta = 25°C, No signal,

The value in the table show typical value.) (cont)

Pin No. Pin Name Note Equivalent Circuit Pin Description

12 PB-NF(R) PB-IN = Vref

17 PB-NF(L)
13 PB-EQ(R) PB-OUT = Vref

16 PB-EQ(L)
21 REC-IN(R) V = Vref

V

CC

GND

PB-IN

PB-OUT

V

CC

PB-EQ feed back

NAB output

REC-EQ input

22 REC-IN(L)
14 PB-OUT(R) V = Vref

15 PB-OUT(L)
18 A 120/70 I = 20 µA

19 A/B
20 B I/

II

22k

100 k

7Vref

100 k

I

V

CC

GND

V

CC

GND

PB output

Mode control input

Rev.2, Jul. 1998, page 3 of 29

HA12219NT

Pin Description, Equivalent Circuit (VCC = 12 V, Vref = 5.6 V, Ta = 25°C, No signal,

The value in the table show typical value.) (cont)

Pin No. Pin Name Note Equivalent Circuit Pin Description

10 IREF V = 1.2 V

11 GND GND pin

Equalizer
reference current
input

Rev.2, Jul. 1998, page 4 of 29

Block Diagram

HA12219NT

C : F

A /70

A/

13 12

14

17 16 15

18

−

120/70

PB-OUT(R)

PB-OUT(L)

120/70

−

AAB

+

B

GND

Unit R : Ω

IREF

10 11

PB-IN A(R)

PB-IN A(L)

VREF

+

+

PB-IN B(R)

5 6 7 8 9

Return SW

PB-IN B(L)

REC-RETURN

B

/II

20 19

+

(R)

21

+

(L)

22

(R)

REC-IN

(L)

REC-IN

REC-EQ

REC-EQ

(R)

(L)

REC-OUT

REC-OUT

CC

V

1 2 3 4

+ +

CC

V

Rev.2, Jul. 1998, page 5 of 29

HA12219NT

Parallel Data Format

Pin No. Pin Name Lo Mid Hi

18 A 120/70 * — *
19 A/B B

Return SW OFF
REC Mute ON

20 B I/II REC-EQ *

TYPE I

Note: PB-EQ 120/70 logic

A/BBBB

A 120

120/70 B IIII/II Lo Mid Hi

120120

Lo Lo 120 µ 120 µ 120 µ
Lo Hi 70 µ 120 µ 120 µ
Hi Lo 120 µ 70 µ 70 µ
Hi Hi 70 µ 70 µ 70 µ

A
Return SW ON
REC Mute ON

—REC-EQ *

A
Return SW ON
REC Mute OFF

TYPE II

Rev.2, Jul. 1998, page 6 of 29

HA12219NT

Functional Description

Power Supply Range

HA12219NT is designed to operate on single supply, shown by table 1.

Table 1 Supply Voltage

Item Power Supply Range

Single Supply 9.5 V to 15.0 V

Reference Voltage

As AC reference (Vref) of this IC has not a curr ent drivability, Vref fluctuates by A/B switching of PB-EQ.
Provided it causes you anxiety, please supply 7 pin with approximate 1/2 V
For example, a suitable circuit is shown by figure 1.
This IC has a capacitor charger for the Vref, indicated to the pin interface circuit figure.

voltage.

CC

470 Ω

V

CC

1

11

GND

7

Vref

+

470 µF

Figure 1 Reference Voltage Circuit

Lch PB-EQ Reference voltage
Lch REC-EQ Reference voltage
Rch REC-EQ Reference voltage
Rch PB-EQ Reference voltage

Rev.2, Jul. 1998, page 7 of 29

HA12219NT

Operating Mode Control

HA12219NT 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. Lo Mid Hi Unit Test Condition

18, 20 0.0 to 0.5 — 2.4 to V

CC

V

Input PinVMeasure

19 0.0 to 0.5 1.2 to 1.8 2.4 to V

CC

V

Note: 1. Each pin is pulled down with 100 kΩ 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 standardi ze d.
(High: Less than V

, Low: More than –0.2 V)

CC

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

REC-IN

22

PB-OUT

15

B head

A head

REC-OUT(L)

PB-IN B(L)

PB-IN A(L)

2

4

5

8

Return SW

B

+

−

A

REC - EQ

Vref

Rev.2, Jul. 1998, page 8 of 29

7

Figure 2 Block Diagram (Lch)

1310

Normal Speed
PB-A

HA12219NT

Level Block Diagram

The gain establishment of PB-EQ considers PB output level
{(external AMP+PB AMP <HA12136A>) = 580 mV (Dolby Level)} like figure 3 as the target.

Regarding REC-EQ adjust the gain in front of input to this IC.
Similarly to PB, it consider Dolby level as a stan dard. And R1 needs the value more than 5.6 kΩ.
Because mode establishment resistances are built-in, REC-EQ frequ e n cy characteristics are respectiv ely

fixed value.
In case the change of the frequency characteristics are necessary, please inquire the responsible agent

because the adjustment of resistors is necessary.

580 mV

(Dolby level)

63.6 mV

HA12136A

0.6 mV

40.5 dB

PB-EQ

Figure 3 PB Level Block Diagram (120

Dolby IC

µµµµ

s, 1 kHz)

26 dB

Rev.2, Jul. 1998, page 9 of 29