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TDA5745 Datasheet Low power mixers/oscillators for hyperband tuners

Manufacturer: NXP Semiconductors

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General Description

The TDA5744 and TDA5745 are 2-band mixers/oscillators intended for VHF/UHF and hyperband tuners (see Fig.1).

The Integrated Circuits (ICs) include two double balanced mixers and two oscillators, for the VHF and UHF band, and an IF amplifier.

With proper oscillator application and by using a switchable inductor to split the VHF band into two sub-bands (the full VHF/UHF and hyperband) the TV bands can be covered.

Overview

INTEGRATED CIRCUITS DATA SHEET TDA5744; TDA5745 Low power mixers/oscillators for hyperband tuners Preliminary specification File under Integrated Circuits, IC02 1998 Mar 09 Philips Semiconductors Preliminary specification.

Key Features

  • Mixers/oscillators for hyperband tuners.
  • Balanced mixer with a common emitter input for VHF (single input).
  • Balanced mixer with a common base input for UHF (double input).
  • 4-pin common emitter oscillator for VHF.
  • 4-pin common emitter oscillator for UHF.
  • Electronic band switch.
  • IF amplifier with a low output impedance to drive the SAW filter directly (≈2 kΩ load).
  • Low power, low radiation and small size.
  • Pin compati.

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