tea0676t NXP Semiconductors, tea0676t Datasheet - Page 7

• Manufacturer Part Number: tea0676t
• Description: Dual Pre-amplifier And Equalizer For Reverse Tape Decks
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Notes
1. For an application with a fixed equalization time constant of 120 s the equalizing network may be applied completely
2. It is recommended to switch off V
1997 Oct 07
Switching thresholds
E
V
I
V
V
H
V
I
V
V
EQSW
HSW
SYMBOL
QUALIZATION TIME CONSTANT SWITCHING
EQSW
EQSW(HIGH)
EQSW(LOW)
HSW
HSW(HIGH)
HSW(LOW)
EAD SWITCHING
Dual pre-amplifier and equalizer for
reverse tape decks
external. In this application the 8.2 k resistor has to be changed to 14 k and the internal resistor R
must be short-circuited by fixing the equalization switch input at 70 s (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 0.8V
of contact between tape and tape head while switching off.
pin voltage
input current
pin voltage
pin voltage
pin voltage
input current
HIGH-level pin voltage
LOW-level pin voltage
PARAMETER
CC
with a gradient of 400 V/s at maximum to avoid plops on the tape in the event
load current +100 to 100 A
V
time constant 70 s active
time constant 120 s active
load current +90 to 90 A
V
inputs INA1 and INB1 active
inputs INA2 and INB2 active
EQSW
HSW
= 0 to V
= 0 to V
CONDITIONS
CC
CC
7
1
0
1
0
180
170
2
2
V
V
MIN.
CC
CC
+ 0.5
+ 0.5
0.8V
0.8V
TYP.
CC
CC
Product specification
+180
V
1
+170
V
1
TEA0676T
2
2
CC
CC
V
V
MAX.
CC
CC
EQ
0.5 V
0.5 V
= 5.8 k
CC
UNIT
V
V
V
V
A
A