Product Summary

The TDA4665 is an integrated baseband delay line circuit with one line delay. It is suitable for decoders with colour-difference signal outputs ±(R-Y) and ±(B-Y).

Parametrics

TDA4665 absolute maximum ratings: (1)VP1, analog supply voltage (pin 9): -0.5 to +7 V; (2)VP2, digital supply voltage (pin 1): -0.5 to +7 V; (3)V5, voltage on pin 5: -0.5 to VP + 1.0 V; (4)Vn, voltage on pins 11, 12, 14 and 16: -0.5V to Vp; (5)Tstg, storage temperature: -25 to +150℃; (6)Tamb, operating ambient temperature: 0 70℃; (7)VESD, electrostatic handling for all pins: ±500 V.

Features

TDA4665 features: (1)Two comb filters, using the switched-capacitor technique, for one line delay time (64 μs); (2)Adjustment-free application; (3)No crosstalk between SECAM colour carriers (diaphoty); (4)Handles negative or positive colour-difference input signals; (5)Clamping of AC-coupled input signals (±(R?Y) and ±(B?Y)); (6)VCO without external components; (7)3 MHz internal clock signal derived from a 6 MHz CCO, line-locked by the sandcastle pulse (64 μs line); (8)Sample-and-hold circuits and low-pass filters to suppress the 3 MHz clock signal; (9)Addition of delayed and non-delayed output signals; (10)Output buffer amplifiers; (11)Comb filtering functions for NTSC colour-difference signals to suppress cross-colour.

Diagrams

TDA4665 block diagram

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