TDA6403A Overview
The TDA6402, TDA6402A, TDA6403 and TDA6403A are programmable 2-band mixers/oscillators and synthesizers intended for VHF/UHF cable tuners (see Fig.1). The devices include two double balanced mixers and two oscillators for the VHF and UHF band respectively, an IF amplifier and a PLL synthesizer. The VHF band can be split-up into two sub-bands using a proper oscillator application and a switchable inductor.
TDA6403A Key Features
- Single-chip 5 V mixer/oscillator and synthesizer for cable TV and VCR tuners
- Synthesizer function patible with existing TSA5526
- Universal bus protocol (I2C-bus or 3-wire bus)
- Bus protocol for 18 or 19-bit transmission (3-wire bus)
- Extra protocol for 27-bit transmission (test modes and features for 3-wire bus)
- Address + 4 data bytes transmission (I2C-bus ‘write’ mode)
- Address + 1 status byte (I2C-bus ‘read’ mode)
- 4 independent I2C-bus addresses
- 1 PNP buffer for UHF band selection (25 mA)
- 3 PNP buffers for general purpose, e.g. 2 VHF sub-bands, FM sound trap (25 mA)
TDA6403A Applications
- Cable tuners for TV and VCR (switched concept for VHF)