TEA0676T datasheet(4/20 Pages) PHILIPS

No. de pieza	TEA0676T

Descripción Electrónicos	Dual pre-amplifier and equalizer for reverse tape decks

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Fabricante Electrónico	PHILIPS [NXP Semiconductors]

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4 / 20 page

1997 Oct 07

4

Philips Semiconductors

Product speciﬁcation

Dual pre-ampliﬁer and equalizer for

reverse tape decks

TEA0676T

PINNING

SYMBOL

DESCRIPTION

OUTA

1

output channel A

n.c.

2

not connected

EQOUTA

3

output equalizer channel A

EQINA

4

input equalizer channel A

VCC

5

supply voltage

INA1

6

input channel A1

(forward or reverse)

Vref

7

reference voltage

INA2

8

input channel A2

(reverse or forward)

INB2

9

input channel B2

(reverse or forward)

HSW

10

input head switch

INB1

11

input channel B1

(forward or reverse)

GND

12

ground

EQINB

13

input equalizer channel B

EQOUTB

14

output equalizer channel B

EQSW

15

input equalizer switch

OUTB

16

output channel B

Fig.2 Pin configuration.

handbook, halfpage

TEA0676T

MGE861

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

OUTA

n.c.

EQOUTA

EQINA

VCC

INA1

Vref

INA2

INB2

HSW

INB1

GND

EQINB

EQOUTB

EQSW

OUTB

FUNCTIONAL DESCRIPTION

Gain of pre-amplifier = 30 dB; minimum gain of

EQ-amplifier = 24.5 dB at f = 1 kHz with 70

µs cut-off

frequency.

Head switching is achieved when pin 10 (HSW) is

connected to ground via a 27 k

Ω resistor (inputs INA2,

INB2 are active) or connected to HIGH level (0.8VCC)

(inputs INA1, INB1 are active).

Equalization time constant switching (70

µs/120 µs) is

achieved when pin 15 (EQSW) is connected to ground via

an 18 k

Ω resistor (120 µs) or left open-circuit (70 µs).

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