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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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TDA5637T Fiches technique(PDF) 2 Page - NXP Semiconductors |
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TDA5637T Fiches technique(HTML) 2 Page - NXP Semiconductors |
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2 / 28 page  1996 Jun 10 2 Philips Semiconductors Product specification 9 V VHF, hyperband and UHF mixers- oscillators for TV and VCR 3-band tuners TDA5636; TDA5637 FEATURES • Balanced mixer with a common emitter input for band A (single input) • 2-pin oscillator for bands A and B • Balanced mixer with a common base input for bands B and C (balanced input) • 4-pin oscillator for band C • Local oscillator buffer output for external prescaler • SAW filter preamplifier with a low output impedance to drive a 75 Ω load • Band gap voltage stabilizer for oscillator stability • Electronic band switch • External IF filter between the mixer output and the IF amplifier input • Pin to pin compatible with TDA5636B; TDA5637B family (same function with symmetrical IF output). APPLICATIONS • 3-band all-channel TV and VCR tuners • Any standard. GENERAL DESCRIPTION The TDA5636 and TDA5637 are monolithic integrated circuits that perform the mixer/oscillator functions for bands A, B and C in TV and VCR tuners. These low-power mixer/oscillators require a power supply of 9 V and are available in a very small package. The devices give the designer the capability to design an economical and physically small 3-band tuner. They are suitable for European standards, as illustrated in Fig.17, with the following RF bands: • 48.25 to 168.25 MHz • 175.25 to 447.25 MHz • 455.25 to 855.25 MHz. With an appropriate tuned circuit, they are also suitable for NTSC all-channel tuners (USA and Japan). The tuner development time can be drastically reduced by using these devices. These circuits belong to the TDA5636B/TDA5637B family which has exactly the same function with an IF amplifier having a symmetrical IF output to drive a SAW filter directly. It is possible to build tuners with either an asymmetrical or a symmetrical IF output with one main tuner lay-out. |
Numéro de pièce similaire - TDA5637T |
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Description similaire - TDA5637T |
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