TEA0676T View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

TEA0676T

Dual pre-amplifier and equalizer for reverse tape decks

Philips Electronics 

Philips Semiconductors

Dual pre-amplifier and equalizer for

reverse tape decks

Product specification

TEA0676T

PINNING

SYMBOL

OUTA

n.c.

EQOUTA

EQINA

VCC

INA1

Vref

INA2

INB2

HSW

INB1

GND

EQINB

EQOUTB

EQSW

OUTB

PIN

DESCRIPTION

1 output channel A

2 not connected

3 output equalizer channel A

4 input equalizer channel A

5 supply voltage

6 input channel A1

(forward or reverse)

7 reference voltage

8 input channel A2

(reverse or forward)

9 input channel B2

(reverse or forward)

10 input head switch

11 input channel B1

(forward or reverse)

12 ground

13 input equalizer channel B

14 output equalizer channel B

15 input equalizer switch

16 output channel B

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 kΩ resistor (inputs INA2,

handbook, halfpage

OUTA 1

16 OUTB

n.c. 2

15 EQSW

EQOUTA 3

14 EQOUTB

EQINA 4

13 EQINB

TEA0676T

VCC 5

12 GND

INA1 6

11 INB1

Vref 7

10 HSW

INA2 8

9 INB2

MGE861

Fig.2 Pin configuration.

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

1997 Oct 07

4

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