NTE744
Integrated Circuit
RF/IF Amp
Description:
The NTE744 is a monolithic silicon integrated circuit that provides an rf amplifier, if amplifier, mixer,
oscillator, AGC detector, and voltage regulator on a single chip. It is intended for use in super鈥揾etero-
dyne AM radio receiver applications particularly in automobiles. The NTE744 is supplied in a 14鈥搇ead
dual鈥搃n鈥搇ine plastic package and operates over the temperature range of 鈥?5擄 to 125擄C.
Features:
D
Low鈥搉oise, low鈥揜
b
, rf stage in cascode connection鈥揺liminates Miller鈥揈ffect regeneration and
allows controlled power rise by the choice of external components.
D
Mixer鈥搊scillator stage with internal feedback鈥揺liminates need for tapped or multi鈥搘inding os-
cillator coils
D
Cascode if amplifier with controlled output impedance and negligible Miller Effect鈥揺liminates
regeneration and selectivity skewing
D
Frequency鈥揷ounter AGC circuit鈥揳llows control of AGC response by selection of the coupling
capacitor.
D
Integral regulation with built鈥搃n surge protection
D
Separately accessible amplifiers
Absolute Maximum Ratings:
DC Supply Voltage (Pin3), V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V
DC Supply Voltage (IF Output, Pin6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
DC Supply Voltage (RF Output, Pin13) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
DC Supply Voltage (Mixer Output, Pin14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
DC Current (Pin3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35mA
Power Dissipation (Up to T
A
= +55擄C), P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750mW
Derate Above T
A
= 55擄C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.67mW/擄C
Operating Ambient Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +125擄C
Storage Temperatur Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +150擄C
Lead Temperature (During Soldering, 1/16鈥?(1.59mm)from case, 10sec max), T
L
. . . . . . . . +265擄C
1
2
3
