Daewoo 14Q1, 21Q2 TDA4665Base Band Delay Line, 3Block Diagram Pin Description, PIN Description

TDA4665(Base Band Delay Line)

(1)Features

•Two comb filters, using the switched-capacitor technique,for one line delay time (64µs)

•Adjustment free application

•No crosstalk between SECAM colour carriers

•Handles negative or positive colour-difference input signals

•Clamping of AC-coupled input signals(±(R-Y)and±(B-Y))

•VCO without external components

•3MHz internal clock signal derived from a 6MHz VCO, line-locked by the sandcastle pulse (64µs line)

•Sample-and -hold circuits and low-pass filters to suppress the 3 MHz clock signal

•Addition of delayed and non-delayed output signals

•Output buffer amplifiers

•Comb filtering functions for NTSC colour-difference signals to suppress cross-colour

(2)General Description

The TDA4661 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).

(3)Block Diagram

(4) Pin Description

SYMBOL	PIN	DESCRIPTION
Vp2	1	+5V supply voltage for digital part
n.c.	2	not connected
GND2	3	ground for digital part (0V)
i.c.	4	internally connected
SAND	5	sandcastle pulse input
n.c.	6	not connected
i.c.	7	internally connected
i.c.	8	internally connected

SYMBOL	PIN		DESCRIPTION
Vp1	9	+5V supply voltage for analog part
GND1	10	ground for analog part (0V)
V0 (R-Y)	11	± (R-Y) output signal
V0 (B-Y)	12	± (B-Y) output signal
n.c.	13	not connected
V1 (B-Y)	14	± (B-Y) input signal
n.c.	15	not connected
V1 (R-Y)	16	± (R-Y) input signal

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