NTE1578
Integrated Circuit
FM Mixer/IF Amp
Description:
The NTE1578 is an FM front–end integrated circuit in a 16–Lead DIP type package designed for use
in car radio and home stereo applications. This device has a built–in AGC driver circuit which im-
proves interference characteristics. It thereby offers advantages such as improved interference char-
acteristics without sacrificing usable sensitivity and the conventional DX–LOCAL change–over
switch.
Features:
D Double–Balanced Type MIX (Improved Spurious Characteristic)
D Keyed AGC/Keyed Classical AGC (Improved Intermodulation, Cross Modulation Characteristic)
D Differential IF Amplification (Improved Limiting Characteristic)
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Maximum Supply Voltage (Pin12, Pin15), VCC1max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5V
Maximum Supply Voltage (Pin5, Pin6), VCC2max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V
Allowable Power Dissipation (TA ≤ +50°C, Note 1), PDmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600mW
Operating Temperature Range, Topg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C
Note 1. PDmax = 460mW at TA = +70°C
Recommended Operation Condition: (TA = +25°C unless otherwise specified)
Recommended Supply Voltage (Pin12, Pin15), VCC1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V
Recommended Supply Voltage (Pin5, Pin6), VCC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13V
Electrical Characteristics: (TA = +25°C, VCC1 = 8V, VCC2 = 13V unless otherwise specified)
Parameter
Symbol
ICC1
Test Conditions
Pin 12, 15
Pin 5, 6
Min
17
Typ Max Unit
25
8
36
11
20
20
600
–
mA
mA
mV
mV
µA
V
Dissipation Current
ICC2
5
Local OSC Input Offset
MIX Input Offset
∆VINOSC
∆VINMIX
∆IOUT MIX
–20
–20
–600
7.6
–
0
0
MIX Output Offset
0
High Level AGC Output
Low Level AGC Output
VAGC H Vi = 0dBu, VCL = 4V
VAGC L Vi = 100dB, VCL = 4V
7.9
0.5
1
V