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–heterodyne AM radio receiver applications particularly in automobiles. The NTE744 is supplied in a 14–lead dual–in–line plastic package and operates over the temperature range of –55° to 125°C. Features: D Low–noise, low–Rb, rf stage in cascode connection–eliminates Miller–Effect regeneration and allows controlled power rise by the choice of external components. D Mixer–oscillator stage with internal feedback–eliminates need for tapped or multi–winding oscillator coils D Cascode if amplifier with controlled output impedance and negligible Miller Effect–eliminates regeneration and selectivity skewing D Frequency–counter AGC circuit–allows control of AGC response by selection of the coupling capacitor. D Integral regulation with built–in 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 TA = +55°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750mW Derate Above TA = 55°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.67mW/°C Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +125°C Storage Temperatur Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C Lead Temperature (During Soldering, 1/16” (1.59mm)from case, 10sec max), TL . . . . . . . . +265°C Electrical Characteristics: (TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit V1, V4 – 4.7 – V V2, V3, V14 – 6.8 – V At Pin5 V5 – 0.25 – V At Pin6 V6 – 12 – V At Pin7 V7 – 0.76 – V V8, V9 – 0 – V V10, V11 – 0.71 – V At Pin12 V12 – 0.71 – V At Pin13 V13 – 4.0 – V – 0 – mA Static Characteristics DC Voltage At Pin1, Pin4 At Pin2, Pin3, Pin14 At Pin8, Pin9 At Pin10, Pin11 DC Current I1, I4, I5, I7, Into Pin1, Pin4, Pin5, Pin7, Pin8, Pin9, Pin10, Pin11, Pin12 I8, I9, I10, I12 Into Pin2 I2 – 1.2 – mA Into Pin3 I3 – 15 – mA Into Pin6 I6 – 4.3 – mA Into Pin13 I13 – 4.5 – mA Into Pin14 I14 – 0.17 – mA Input Signal to Dummy Antenna at fIN = 1MHz, 30% AM Modulation at fMOD = 400Hz, for 11mV Output at VO – 2.3 – µV Ratio of Output at VO with Modulation ON & the OFF, Input Signal = 100µV, 30% AM Modulation at fMOD = 400Hz 34 43 – dB – µV Performance Characteristics Sensitivity Signal–to–Noise Ratio S/N Overload Distortion Input Signal set at 1MHz, 90% AM Modulation, Distortion at VO must be ≤ 10% 160k 400k Pin Connection Diagram Mixer Input 1 14 Mixer Output OSC Tank 2 13 RF Output VCC 3 12 RF Input Mixer Bypass 4 11 RF Bypass AGC Drive 5 10 AGC Capacitor IF Output 6 9 RF GND IF Input 7 8 Substrate & IF Amp GND 14 8 1 7 .300 (7.62) .785 (19.95) Max .200 (5.08) Max .100 (2.45) .600 (15.24) .099 (2.5) Min