TDA5736M

5V VHF, hyperband and UHF mixers/oscillators for TV and VCR 3-band tuners

GENERAL DESCRIPTION

The TDA5736 and TDA5737 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 5 V and are available in a very small package.

These 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 and 455.25 to 855.25 MHz. With an appropriate tuned circuit, they are also suitable for NTSC all channel tuners USA and Japan.

FEATURES

• Balanced mixer with a common emitter input for band A single input

• 2-pin oscillator for band A

• Balanced mixer with a common base input for bands B and C balanced input

• 3-pin oscillator for band B

• 4-pin oscillator for band C

• Local oscillator buffer output for external prescaler

• SAW filter preamplifier with a low output impedance to drive the SAW filter directly

• Band gap voltage stabilizer for oscillator stability

• Electronic band switch

• External IF filter between the mixer output and the IF amplifier input.

APPLICATIONS

• 3-band all channel TV and VCR tuners

• Any standard.