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Details, datasheet, quote on part number:NTE748
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Datasheet text preview:
NTE748 Integrated Circuit TV Sound Circuit
Description: The NTE748 is an integrated circuit in a 14Lead DIP type pacjage designed for IF limiting, detection, audio preamplifier and driver for the sound portion of a TV receiver. Features: D Excellent Limiting with 80µV(rms) Input Signal typ D Large OutputVoltage Swingto 3.5V(rms) typ D High IF Voltage Gain65dB typ D Zener PowerSupply Regulation Builtin D ShortCircuit Protection D A Coincidence Discriminator that Requires Only One RLC Phase Shift Network D Preamplifier to Drive a Single ExternalTransistor ClassA Audio Output Stage Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Power Supply Voltage, V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +16V Input Voltage, Vin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.7V(rms) Power Dissipation (Package Limitation), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625mW Derate above +25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0mW/°C Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +75°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65° to +150°C Electrical Characteristics: (V+ = 12V, TA = +25°C, f = 4.5MHz, Deviation = ±25kHz unless otherwise specified)
Parameter Input Voltage AM Rejection Symbol VL AMR 3dB Limiting Vin = 20mVrms, AM = 30%, AMR = 20 log, Note 1 VOFM: f = 4.5MHz, Deviation = ±25kHz, QL = 24 VOAM: f = 5.5MHz, Deviation = ±50kHz, QL = 30 Test Conditions Min Typ 80 45 45 1.0 3.5 Max 160 Unit µVrms dB dB % Vrms
Total Harmonic Distortion Maximum Undistorted Audio Output Voltage (Pin10)
THD
QL = 24, 7.5kHz Deviation, Note 1
Vo(max) Audio Gain Adjusted Externally, Q = 24, Note 1
Electrical Characteristics (Cont'd): (V+ = 12V, TA = +25°C, f = 4.5MHz, Deviation = ±25kHz unless otherwise specified)
Parameter Recovered Audio (Pin2) Symbol VA AVP AVIF Rin Cin VReg ID PD IZ = 5mA IZ = 5mA IZ = 5mA Test Conditions f = 4.5MHz, Deviation = ±25kHz, QL = 24, Note 1 f = 5.5MHz, Deviation = ±50kHz, QL = 30, Note 1 Audio Preamplifier IF Voltage Gain Parallel Input Resistance Parallel Input Capacitance Nominal Zener Voltage Power Supply Current Power Dissipation Open Loop Gain Min Typ Max 375 Unit Vrms Vrms dB dB k pF V mA mW 0.35 0.50 0.80 25 65 9.0 6.0 11.6 31 300
Note 1. QL is loaded circuit Q.
Pin Connection Diagram
Bypass 1 Audio Output 2 Bypass 3 IF Input 4 Bypass 5 Bypass 6 GND 7
14 VCC 13 Quadrature Network 12 Test Point 11 Quadrature Bypass 10 Preamp Output 9 Preamp Input 8 IF Output
14
8
1
7
.785 (19.95) Max .200 (5.08) Max
.300 (7.62)
.100 (2.45) .600 (15.24)
.099 (2.5) Min
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