NTE1842
Integrated Circuit
FM/AM IF System
Description:
The NTE1842 is a FM/AM IF system IC in a 16鈥揕ead DIP type package designed for portable use.
As compared with conventional ICs, this device is greatly improved in external parts counts and elec-
trical characteristics, espeically tweet and overload distortions.
Features:
D
Low Supply Current, AM: 7mA, FM: 10mA (Typ)
D
Low Number of External Components
D
Excellent Tweet
D
Low Overvoltage Distortion
D
Tuning Indicator LED Driving Capability: I
LAMP
= 10mA (Max)
D
Built鈥揑n FM/AM Mode Switch
D
Common Output for FM/AM
D
Operating Supply Voltage Range: V
CC9opr)
= 3V to 8V
Absolute Maximum Ratings:
(T
A
= +25擄C unless otherwise specified)
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V
Lamp Current, I
LAMP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA
Power Dissipation, P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750mW
Derate Above 25擄C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6mW/擄C
Operating Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄C to +75擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +150擄C
DC Characteristics:
(V
CC
= 5V, Pin Voltage at No Signal)
Typical
Parameter
Pin1 Voltage (AM Mix Input)
Pin2 Voltage (AM Mix Bypass)
Pin3 Voltage (AM OSC)
Pin4 Voltage (Reg)
Symbol
V
1
V
2
V
3
V
4
AM
1.5
1.5
2.3
2.3
FM
0
0
2.3
2.3
Unit
V
V
V
V
1
2
3
