NTE1246 Integrated Circuit TV Sound IF, Audio Output, 2.4W Description: The NTE1246 is a silicon monolithic integrated circuit designed for SIF and audio sections in TV receivers. It includes a sound IF amplifier, FM detector, DC volume output control circuit, audio output amplifier (2.4W output power) and a voltage regulator. Features: D Reduced Number of External Components D DC Controlled, so Sheilded wire not Required, Variable Resistor may be Placed Anywhere D Electronic Attenuation: 80dB typ. D Peak Differential FM Detection Method, Amplifies Circuitry and Adjustment D Wide Operating Voltage Range: 9V to 18V Note 1. PC Board Copper Area 50 x 50mm2 Absolute Maximum Ratings: (TA = +25°C, unless otherwise specified) Supply Voltage (Pin 10), V10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V Supply Current (Pin 10), I10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A Supply Current (Pin 5), I5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA Input Voltage, Vi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Vp−p Power Dissipation (TA = +75°C), PD1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8W Power Dissipation (Note 1), PD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4W Operating Temperature Range, Topg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +75°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40° to +150°C IF Stage:(VCC = 12V, Fo = 4.5MHz, RB = 100Ω, Rg = 50Ω, V14 ≥ 1.3V, fM = 400Hz, f = ±25kHz, TA = +25°C, unless otherwise specified) Parameter Pin 5 Voltage Symbol Test Conditions V5A Min Typ Max Unit 7.5 8.0 8.5 V V5B VCC = 18V. RB = 330Ω 7.5 8.0 8.5 V I10A No Input Signal 14 19 24 mA I10B VCC = 18V, RB = 330Ω, No Input Signal 16 28 35 mA IF Limiting Voltage Vi(lim) VOAF (Vi = 10mVrms) −3dB − 200 400 µVrms Detector Output Voltage VOAF Vi = 10mVrms 300 360 − mVrms Detector Distortion THD1 − 0.7 − % AM Rejection AMR AM MOD: 30%, fM = 400Hz, Vi = 10mVrms −40 −50 − dB V14 = 0V −60 −80 − dB Pin 10 Current Max. Attenuation ATTmax Sound Power Stage:(VCC = 12V, f = 400Hz, RB = 100Ω, Rg = 600Ω, RL = 8Ω, TA = +25°C unless otherwise specified) Parameter Symbol Sound Stage Voltage Gain GVAF Sound Output Power Sound Output Distortion Overall Sound Output Distortion Test Conditions Min Typ Max Unit Vi = 30mVrms 33 37 41 dB POA THD = 10% 0.9 1.2 − W POB VCC = 18V, RB = 330Ω, THD = 10% 2.0 2.4 − W THD2A PO = 0.5W − 0.6 2.0 % THD2B VCC = 18V, RB = 330Ω, PO = 0.5W − 0.5 2.0 % THD3 PO = 0.5W, Vi = 10mVrms − 1.5 4.0 % fo = 4.5MHz Pi IImpedance Pin d 5.5MHz 6.0MHz 6.5MHz U it Unit R C R C R C R C Pin 12 IF Input 2 9.5 2 9.4 1.9 9.4 1.9 9.4 kΩ/pF Pin 1 Detector Connect 2.4 6.3 2.4 6.2 2.4 6.1 2.4 6.1 kΩ/pF Pin 2 Detector Connect 11.5 9 9 8.5 8.5 8.3 7.8 8.1 kΩ/pF Pin Connection Diagram FM Detector 1 14 Volume Control FM Detector 2 13 SIF Input Cold De−Emphasis 3 12 SIF Input Hot SIF Detector Output 4 11 Feedback SIF Supply Voltage 5 10 VCC Decouple 6 9 Bootstrap Input 7 8 Output .164 (4.2) .252 (6.4) 14 8 1 7 2.00 (5.08) Max .300 (7.62) .764 (19.4) Max .100 (2.54) .020 (.508) .100 (2.54)