NTE746 Integrated Circuit TV Video IF Amplifier Description: The NTE746 is a monolithic integrated circuit in an 8–Lead DIP type package with wide–range AGC for replacement of 1st and 2nd IF stages in solid–state color and black and white TV sets. It will directly drive a 3rd IF stage. Features: D Center Frequency: FO = 45MHz D Bandwidth: BW = 6MHz D Power Gain: 50dB Min D AGC Range: 60dB Min D Low Reverse–Transfer Admittance: 1µmho Typ D D D D Y21 Constant to 75MHz 12V Operation, Single–Polarity Power Supply Total Supply Current: 20mA Typ Nearly Constant Input and Output Admittance over the Entire AGC Range Applications: D TV Video IF D Defense Communications Satellite Programs D Combined AM/FM Radio IF Amplifiers D Linear Switch or Chopper for Multiplex Modulation or Demodulation Absolute Maximum Ratings: (TA = +25°C) Power Supply, V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Output Supply, V1, V8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V AGC Supply, VAGC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4V < VAGC < V+ Differential Input Voltage, Vin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±7V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625mW Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mW/°C Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +75°C Electrical Characteristics: (V+ = 12V, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit – 20 – mA – 6.5 – mA 0dB Attenuation – 5.0 – V 60dB Attenuation – 6.9 – V 0db Attenuation – 0.1 – mA 60dB Attenuation – 0.2 – mA DC Characteristics Total Supply Current IS Output Stage Current I1 + I8 AGC Supply Voltage VAGC AGC Supply Current IAGC Pin1, Pin2, and Pin8 Electrical Characteristics (Cont’d): (V+ = 12V, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit – 46 50 dB Small–Signal Characteristics (f = 45MHz) Power Gain BW = 6MHz Y–Parameters Single–Ended Input Admittance g11 – 1.0 – mmho b11 – 2.8 – mmho Differential Output Admittance g22 – 0.07 – mmho b22 – 0.50 – mmho – 0.06 – mmho b11 – 0.0 – mmho g22 – 0.004 – mmho b22 – 0.04 – mmho – 0.2 – mho – > 60 – dB Differential Admittance Variation w/ AGC Input Admittance g11 Output Admittance 0dB to 60dB Y21 0dB Agc Useable AGC Range in 45MHz TV IF Pin Connection Diagram IF Output 1 8 IF Output VCC 2 7 GND GND 3 6 (+) Input (–) Input 4 5 Input 8 5 .260 (6.6) 1 4 .300 (7.62) .390 (9.9) Max .155 (3.93) .145 (3.68) .100 (2.54) .300 (7.62)