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INTEGRATED CIRCUITS
DATA SHEET
SAA4963 Integrated NTSC comb filter
Preliminary specification Supersedes data of 1996 Nov 22 File under Integrated Circuits, IC02 1997 Mar 03
Philips Semiconductors
Preliminary specification
Integrated NTSC comb filter
FEATURES • One chip NTSC comb filter • Time discrete but continuous amplitude signal processing with analog interfaces • Internal delay lines, filters, clock processing and signal switches • Alignment-free • Few external components. QUICK REFERENCE DATA SYMBOL VCCA VDDD VCCO VCCPLL ICCO IDDD ICCA ICCPLL V13(p-p) V14(p-p) V7(p-p) V1(p-p) V11(p-p) V9(p-p) analog supply voltage digital supply voltage analog supply voltage output buffer analog supply voltage PLL analog supply current output buffer digital supply current analog supply current analog supply current PLL CVBS input signal (peak-to-peak value) luminance input signal (peak-to-peak value) chrominance input signal (peak-to-peak value) subcarrier input signal (peak-to-peak value) luminance output signal (peak-to-peak value) chrominance output signal (peak-to-peak value) PARAMETER MIN. 4.75 4.75 4.75 4.75 − − − − 0.7 0.7 − 100 0.6 − 5 5 5 5 35 3 10 1.5 1 1 0.7 200 1 0.7 TYP. GENERAL DESCRIPTION
SAA4963
The SAA4963 is an alignment-free one chip comb filter compatible with NTSC M systems.
MAX. 5.5 5.5 5.5 5.5 45 6 17 2.5 1.4 1.4 1 400 1.54 1.1 V V V V
UNIT
mA mA mA mA V V V mV V V
ORDERING INFORMATION TYPE NUMBER SAA4963 SAA4963T PACKAGE NAME DIP20 SO20 DESCRIPTION plastic dual in-line package; 20 leads (300 mil) plastic small outline package; 20 leads; body width 7.5 mm VERSION SOT146-1 SOT163-1
1997 Mar 03
2
1997 Mar 03
+5 V +5 V +5 V D A 100 nF A 100 nF 47 Ω PLLGND AGND 5 4 8 6 16 15 20 10 17 18 VCCPLL OGND VCCO DGND REFBP REFDL VCCA VDDD 100 nF 100 µF A 100 nF 100 nF 100 µF A 100 µF +5 V A 100 nF 100 µF
handbook, full pagewidth
BLOCK DIAGRAM
Philips Semiconductors
D
A
HDET VDET
FSC 1 HSEL CL3 CONT2 LPFO1 LPF CONTROL CONT1
CURRENT REFERENCE
VOLTAGE REFERENCE
Integrated NTSC comb filter
CLOCK CONTROL CL3 STOPS
SVHS 2
LUMACOMB
HDET CL3 11 YO LPFO1 YCOMB CONT1 CL3 1H DELAY LINES BPF −0.5 CL3 HSEL CL3 CCOMB LPFI 1H DELAY LINES BPF −1 CL3 HSEL CL3 CL3 BPF 0.5 LPFO2 S2B CONT2 CL3 CONT1 19 i.c. 9 CO STOPS DELAY COMPENSATION S2A VDET
A
CSY 12
330 nF
SYNC SEPARATOR
3
CHROMACOMB
3 i.c.
CLAMP
Yext 14
STOPS
330 nF
CVBS 13
330 nF
Cext 7
BIAS
SAA4963
100 nF
MHA558
Remark: all switches in LOW position.
Preliminary specification
SAA4963
Fig.1 Block diagram.
Philips Semiconductors
Preliminary specification
Integrated NTSC comb filter
PINNING SYMBOL PIN FSC SVHS i.c. VCCA AGND VCCO Cext OGND CO REFDL YO CSY CVBS Yext VDDD DGND PLLGND VCCPLL i.c. REFBP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DESCRIPTION subcarrier frequency input SVHS mode forcing internally connected analog supply voltage analog ground analog supply voltage output buffer external chrominance input analog ground output buffer chrominance output signal decoupling capacitor for delay lines luminance output signal storage capacitor CVBS input signal external luminance input digital supply voltage digital ground analog ground PLL analog supply voltage PLL internally connected decoupling capacitor for band-pass filter reference Fig.2 Pin configuration.
VCCO 6 Cext 7 OGND 8 CO 9 REFDL 10
MHA559
SAA4963
handbook, halfpage
FSC 1 SVHS 2 i.c. 3 VCCA 4 AGND 5
20 REFBP 19 i.c. 18 VCCPLL 17 PLLGND 16 DGND
SAA4963
15 VDDD 14 Yext 13 CVBS 12 CSY 11 YO
1997 Mar 03
4
Philips Semiconductors
Preliminary specification
Integrated NTSC comb filter
FUNCTIONAL DESCRIPTION Functional requirements The NTSC comb filter processes the video standard NTSC M. For SVHS signals the input signals are bypassed to the output without processing by selecting the SVHS mode. A sync separation circuit is incorporated to generate control signals for the internal clock processing. With a sync compression of up to 12 dB (see Fig.5) the sync separator works properly. The IC is controlled via the pin SVHS (pin 2) which forces the IC into the SVHS mode (bypass) if the comb filter function is not desired. It is possible to select the following modes: COMB-mode: Luminance and chrominance comb filter function active, if SVHS mode not active SVHS-mode: No IC function active, all clocks inactive, Cext (pin 7) is bypassed to CO (pin 9) and Yext (pin 14) is bypassed to YO (pin 11). This mode is forced via SVHS (pin 2). The mode changes from SVHS to COMB and vice versa are always performed asynchronously with respect to the vertical blanking interval. Pin description FSC (PIN 1) Input for the reference frequency fsc (see note 3 of Chapter “Characteristics”). For SVHS signals the signal performance can be increased by switching the input signal at FSC off. SVHS (PIN 2) Input signal that controls the operation mode. An internal low-pass filter suppresses the subcarrier frequencies. Thus applications are supported where the operation mode (COMB or SVHS) is c.