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TEA0676 데이터시트 PDF




NXP Semiconductors에서 제조한 전자 부품 TEA0676은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 TEA0676 기능
기능 Dual pre-amplifier and equalizer for reverse tape decks
제조업체 NXP Semiconductors
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TEA0676 데이터시트, 핀배열, 회로
INTEGRATED CIRCUITS
DATA SHEET
TEA0676T
Dual pre-amplifier and equalizer for
reverse tape decks
Product specification
Supersedes data of 1996 Jun 20
File under Integrated Circuits, IC01
1997 Oct 07




TEA0676 pdf, 반도체, 판매, 대치품
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 kresistor (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 kresistor (120 µs) or left open-circuit (70 µs).
1997 Oct 07
4

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TEA0676 전자부품, 판매, 대치품
Philips Semiconductors
Dual pre-amplifier and equalizer for
reverse tape decks
Product specification
TEA0676T
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX. UNIT
Switching thresholds
EQUALIZATION TIME CONSTANT SWITCHING
VEQSW
pin voltage
IEQSW
input current
VEQSW(HIGH) pin voltage
VEQSW(LOW) pin voltage
load current +100 to 100 µA
VEQSW = 0 to VCC
time constant 70 µs active
time constant 120 µs active
180
12VCC + 0.5
0
0.8VCC
+180
VCC
12VCC 0.5
V
µA
V
V
HEAD SWITCHING
VHSW
IHSW
VHSW(HIGH)
VHSW(LOW)
pin voltage
input current
HIGH-level pin voltage
LOW-level pin voltage
load current +90 to 90 µA
VHSW = 0 to VCC
inputs INA1 and INB1 active
inputs INA2 and INB2 active
170
12VCC + 0.5
0
0.8VCC
+170
VCC
12VCC 0.5
V
µA
V
V
Notes
1. For an application with a fixed equalization time constant of 120 µs the equalizing network may be applied completely
external. In this application the 8.2 kresistor has to be changed to 14 kand the internal resistor REQ = 5.8 k
must be short-circuited by fixing the equalization switch input at 70 µs (pin 15 left open-circuit). To activate the inputs
INA1 and INB1, pin 10 (HSW) might be left open-circuit. In this event the DC level at pin 10 (HSW) is 0.8VCC
2. It is recommended to switch off VCC with a gradient of 400 V/s at maximum to avoid plops on the tape in the event
of contact between tape and tape head while switching off.
1997 Oct 07
7

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