Philips Semiconductors Product specification Baseband delay line TDA4661 FEATURES GENERAL DESCRIPTION • Two comb filters, using the switched-capacitor technique, for one line delay time (64 µs) 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). • Adjustment-free application • No crosstalk between SECAM colour carriers (diaphoty) • Handles negative or positive colour-difference input signals • Clamping of AC-coupled input signals (±(R−Y) and ±(B−Y)) • VCO without external components • 3 MHz internal clock signal derived from a 6 MHz CCO, line-locked by the sandcastle pulse (64 µs 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. QUICK REFERENCE DATA SYMBOL PARAMETER MIN. TYP. MAX. UNIT VP1 analog supply voltage (pin 9) 4.5 5 6 VP2 digital supply voltage (pin 1) 4.5 5 6 V IP(tot) total supply current − 4.9 7.0 mA VI Gv V ±(R−Y) input signal PAL/NTSC (peak-to-peak value; pin 16) − 525 − mV ±(B−Y) input signal PAL/NTSC (peak-to-peak value; pin 14) − 665 − mV ±(R−Y) input signal SECAM (peak-to-peak value; pin 16) − 1.05 − V ±(B−Y) input signal SECAM (peak-to-peak value; pin 14) − 1.33 − V gain VO / VI of colour-difference output signals V11 / V16 for PAL and NTSC 5.3 5.8 6.3 dB V12 / V14 for PAL and NTSC 5.3 5.8 6.3 dB V11 / V16 for SECAM −0.6 −0.1 +0.4 dB V12 / V14 for SECAM −0.6 −0.1 +0.4 dB ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TDA4661 DIP16 plastic dual in-line package; 16 leads (300 mil) long body SOT38-4 TDA4661T SO16 plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 December 1994 DESCRIPTION 2 VERSION December 1994 3 sandcastle pulse input V P1 ±(B–Y) colour-difference input signals ±(R–Y) 5 9 14 16 GND1 10 SANDCASTLE DETECTOR analog supply SIGNAL CLAMPING SIGNAL CLAMPING FREQUENCY PHASE DETECTOR pre-amplifiers SAMPLEANDHOLD SAMPLEANDHOLD addition stages GND2 DIVIDER BY 2 3 TDA4661 LP LP 4, 8 7 2 6 13 15 12 output buffers 11 i.c. n.c. n.c. n.c. n.c. MEH182.2 ±(B–Y) colour- difference output signals ±(R–Y) Baseband delay line Fig.1 Block diagram. 6 MHz CCO 3 MHz shifting clock 1 VP2 digital supply LP DIVIDER BY 192 LINE MEMORY LINE MEMORY Philips Semiconductors Product specification TDA4661 BLOCK DIAGRAM Philips Semiconductors Product specification Baseband delay line TDA4661 PINNING SYMBOL PIN DESCRIPTION VP2 1 +5 V supply voltage for digital part n.c. 2 not connected GND2 3 ground for digital part (0 V) 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 VP1 9 +5 V supply voltage for analog part GND1 10 ground for analog part (0 V) VO(R−Y) 11 ±(R−Y) output signal VO(B−Y) 12 ±(B−Y) output signal n.c. 13 not connected VI(B−Y) 14 ±(B−Y) input signal n.c. 15 not connected VI(R−Y) 16 ±(R−Y) input signal MEH183 V P2 1 16 V I(R−Y) n.c. 2 15 n.c. GND2 3 14 VI(B−Y) i.c. 4 13 n.c. TDA4661 SAND 5 12 VO(B−Y) n.c. 6 11 VO(R−Y) i.c. 7 10 GND1 i.c. 8 9 VP1 Fig.2 Pin configuration. LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). Ground pins 3 and 10 connected together. SYMBOL PARAMETER MIN. MAX. UNIT VP1 supply voltage (pin 9) −0.5 +7 V VP2 supply voltage (pin 1) −0.5 +7 V V5 voltage on pin 5 −0.5 VP + 1.0 V Vn voltage on pins 11, 12, 14 and 16 −0.5 VP V Tstg storage temperature −25 +150 °C Tamb operating ambient temperature 0 70 °C VESD electrostatic handling for all pins (note 1) − ±500 V Note 1. Equivalent to discharging a 200 pF capacitor through a 0 Ω series resistor. THERMAL CHARACTERISTICS SYMBOL Rthj-a December 1994 PARAMETER VALUE UNIT thermal resistance from junction to ambient in free air SOT38-4 75 K/W SOT109-1 220 K/W 4 Philips Semiconductors Product specification Baseband delay line TDA4661 CHARACTERISTICS VP = 5.0 V; input signals as specified in characteristics with 75% colour bars; super-sandcastle frequency of 15.625 kHz; Tamb = +25 °C; measurements taken in Fig.3 unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VP1 supply voltage (analog part; pin 9) 4.5 5 6 V VP2 supply voltage (digital part; pin 1) 4.5 5 6 V IP1 supply current − 4.2 6.0 mA IP2 supply current − 0.7 1.0 mA Colour-difference input signals VI VI(max) input signal (peak-to-peak value) ±(R−Y) PAL and NTSC (pin 16) − 525 − mV ±(B−Y) PAL and NTSC (pin 14) − 665 − mV ±(R−Y) SECAM (pin 16) note 1 − 1.05 − V ±(B−Y) SECAM (pin 14) note 1 − 1.33 − V maximum symmetrical input signal (peak-to-peak value) ±(R−Y) or ±(B−Y) for PAL and NTSC before clipping 1 − − V ±(R−Y) or ±(B−Y) for SECAM before clipping 2 − − V − − 40 kΩ − − 10 pF 1.3 1.5 1.7 V R14, 16 input resistance C14, 16 input capacitance V14, 16 input clamping voltage proportional to VP Colour-difference output signals VO output signal (peak-to-peak value) ±(R−Y) on pin 11 all standards − 1.05 − V ±(B−Y) on pin 12 all standards − 1.33 − V −0.4 0 +0.4 dB V V11/V12 ratio of output amplitudes at equal input signals VI14, 16 = 1.33 V (p-p) V11, 12 DC output voltage proportional to VP R11, 12 output resistance Gv gain for PAL and NTSC gain for SECAM ratio VO/VI −0.6 −0.1 +0.4 dB Vn/Vn+1 ratio of output signals on pins 11 and 12 for adjacent time samples at constant input signals VI14, 16 = 1.33 V (p-p); SECAM signals −0.1 0 +0.1 dB Vn noise voltage (RMS value; pins 11 and 12) VI14, 16 = 0 V; note 2 − − 1.2 mV S/N(W) weighted signal-to-noise ratio VO = 1 V (p-p); note 2 − 54 − dB td delay of delayed signals 63.94 64.0 64.06 µs delay of non-delayed signals 40 60 80 ns ttr ratio VO/VI 2.5 2.9 3.3 − 330 400 Ω 5.3 5.8 6.3 dB transient time of delayed signal on pins 11 respectively 12 300 ns transient of SECAM signal − 350 − ns transient time of non-delayed signal on pins 11 respectively 12 300 ns transient of SECAM signal − 320 − ns December 1994 5 Philips Semiconductors Product specification Baseband delay line SYMBOL PARAMETER TDA4661 CONDITIONS MIN. TYP. MAX. UNIT Sandcastle pulse input (pin 5) fBK burst-key frequency fSAND sandcastle frequency V5 top pulse voltage 14.2 note 3 15.625 17.0 kHz 14.2 15.625 17.0 kHz 4.0 − VP + 1.0 V Vslice internal slicing level V5 − 1.0 − V5 − 0.5 V I5 input current − − 10 µA C5 input capacitance − − 10 pF Notes 1. The signal must be blanked line-sequentially. The blanking level must be equal to the non-colour signal. 2. Noise voltage at f = 10 kHz to 1 MHz; VI14, 16 = 0 (RS < 300 Ω). 3. The leading edge of the burst-key pulse or H-blanking pulse is used for timing. December 1994 6 December 1994 7 28 27 26 25 15 14 16 13 22 nF 23 10 HUE off 22 nF 22 11 27 pF 17 8 7 330 Ω 680 Ω 5 19 6 10 nF 20 10 nF 18 30 pF X2 30 pF 2 0.1 µF 1N4148 10 k Ω +12 V 5 14 16 10 (1) 22 µF 100 nF +5.1 V 1 (1) 10 Ω 10 Ω +5.1 V 9 LINE-LOCKED PLL / PULSE PROCESSING VCO ±(B–Y) comb filtering LINE DELAY LINE DELAY ±(R–Y) comb filtering TDA4661 270 100 nF Ω Vi -(B-Y) 1 nF 1 nF SSC (12 V) 820 Ω 24 3 1 V i -(R-Y) colourdifference signals 220 pF (1) positioned close to pins 3.3 k Ω 0.33 µF 220 pF 4 8.8 7.2 47 nF MHz MHz 21 X1 HUE control 10 k Ω 27 pF Coil: Toko 119LN-A3753 GO Fig.3 Application circuit with TDA4650. 3.3 k Ω 6.8 k Ω 18 k Ω VP TDA4650 330 Ω 120 pF 10 µH PLL off 9 470 Ω 3 560 Ω n.c. n.c. n.c. n.c. i.c. V o -(B-Y) Vo -(R-Y) 5.1 V 2 6 13 15 7 8 4 12 11 +12 V Baseband delay line MEH184.3 220 pF PAL/NTSC SECAM NTSC FILTERS colour standard switching signals PAL SECAM NTSC-3.58 NTSC-4.43 S-VHS (Y, C) CVBS Y chrominance signal 20 to 400 mV (p-p) 10 nF 0.33 µF 12 10 nF VP = +12 V Philips Semiconductors Product specification TDA4661 APPLICATION INFORMATION