TDA5637 Overview
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.
TDA5637 Key Features
- Balanced mixer with a mon emitter input for band A (single input)
- 2-pin oscillator for bands A and B
- Balanced mixer with a mon 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 patible with TDA5636B; TDA5637B family (same function with symmetrical IF output)