NTE7050
Integrated Circuit
Phase Lock Loop (PLL) Stereo Decoder
Description:
The NTE7050 is a Phase Lock Loop (PLL) stereo decoder with cassette head amplifiers in a 16鈥揕ead
DIP type package designed especially for car radios. This device has SDS circuitry where fluctuating
signal strength can cause demodulation noise and distortion. The stereo decoder is compensated
for a typical IF filter with a roll鈥搊ff frequency of 50kHz (2dB down at 38kHz).
Features:
D
A Voltage鈥揅ontrolled Oscillator
D
A Pilot Presence Detector and an Automatic Mono/Stereo Switch
D
A Matrix and Two Amplifiers for the Left and Right Output Signal
D
Two Output Buffers with 10dB Gain and Low Output Impedance
D
Mute Circuit
D
A Source Selector for Radio or Cassette
D
An Input Amplifier of which the Gain can be Adjusted by means of an External Input Resistor
D
A Pilot Cancelling Circuit for an Extra Suppression of the Pilot Signal of 15dB
D
An Signal Dependent Stereo (SDS) Circuit for a Smooth Change Over from Stereo to Mono at
Weak Tuner Input Signals
Absolute Maximum Ratings:
Supply Voltage (Pin3 and Pin9), V
3鈥?
, V
9鈥?
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V
LED Driver (Peak Current), I
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75mA
Total Power Dissipation (T
A
= +25擄C), P
TOT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6W
Operating Ambient Temperature Range, T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?0擄 to +80擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +150擄C
Thermal Resistance, Junction鈥搕o鈥揂mbient, R
thJA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75擄C/W
Recommended Operating Characteristics:
(All voltages with reference to Pin5)
Parameter
Operating Supply Voltage
Symbol
V
CC
Test Conditions
Min
7.0
Typ
8.5
Max
16.0
Unit
V
1
2
3
4
5
