NTE746
Integrated Circuit
TV Video IF Amplifier

Replacement for the MC1350

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:

  • Center Frequency: FO = 45MHz
  • Bandwidth: BW = 6MHz
  • Power Gain: 50dB Min
  • AGC range: 60dB Min
  • LOw Reverse-Transfer Admittance: 1µmho Typ
  • 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:

Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Power Supply Voltage, V+     18V
Output Supply, V1, V8     18V
AGC Supply, VAGC     4V < VAGC < V+
Differential Input Voltage, Vin     ±7V
Power Dissipation     625mW
            Derate Above 25°C     5mW/°C
Operating Ambient Temperature Range, TA     0° to +75°C

Electrical Characteristics: (TA = +25°C, V+ = 12V unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
DC Characteristics
Total Supply Current IS Pin1, Pin2, and Pin8 - 20 - mA
Output Stage Current I1 + I8   - 6.5 - mA
AGC Supply Voltage VAGC 0dB Attenuation - 5.0 - V
60dB Attenuation - 6.9 - V
AGC Supply Current IAGC 0dB Attenuation - 0.1 - mA
60dB Attenuation - 0.2 - mA
Small-Signal Characteristics (f = 45MHz)
Power Gain   BW = 6MHz - 46 50 dB
Y-Parameters Single-Ended Input Admittance g11   - 1.0 - mmhos
b11   - 2.8 - mmhos
Differential Output Admittance g22   - 0.07 - mmhos
b22   - 0.50 - mmhos
Differential Admittance Variation w/AGC Input Admittance g11 0dB to 60dB - 0.06 - mmhos
b11 - 0.00 - mmhos
Output Admittance g22 - 0.004 - mmhos
b22 - 0.04 - mmhos
  Y21 0dB AGC - 0.2 - mhos
Useable AGC Range in 45MHz TV IF     - > 60 - dB

Pin Connection Diagram