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.

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.