TDA4651 Datasheet, PDF (2/15 Pages) NXP Semiconductors – Multistandard colour decoder with negative colour difference output signals

Philips Semiconductors
Multistandard colour decoder with negative
colour difference output signals
Preliminary specification
TDA4651
FEATURES
Identifies and demodulates PAL,
SECAM, NTSC 3.58 and NTSC 4.43
chrominance signals with:
• Gain controlled chrominance
amplifier
• ACC demodulation controlled by
system scanning
• Internal colour difference signal
output filters to remove the residual
subcarrier
• PAL / NTSC demodulation
– H (burst) and V blanking
– PAL switch (disabled for NTSC)
– NTSC phase shift (disabled for
PAL)
– PLL-controlled reference
oscillator
– two reference oscillator crystals
on separate pins with automatic
switching
– quadrature demodulator with
subcarrier reference
• SECAM demodulation
– limiter amplifier
– quadrature demodulator with a
single external reference tuned
circuit
– alternate line blanking, H and V
blanking
– de-emphasis
• Identification
– automatic standard identification
by sequential inquiry
– secure SECAM identification at
50 Hz only, with PAL priority
– four switched outputs for
chrominance filter selection and
display control
– external service switch for
oscillator adjustment
GENERAL DESCRIPTION
The TDA4651 is a monolithic integrated multistandard colour decoder for PAL,
SECAM and NTSC (3.58 and 4.43 MHz) with negative colour difference output
signals. The colour difference output signals are fed to the TDA4661, switched
capacitor delay line.
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V_P
I_P
V_i(p-p)
positive
supply voltage
(pin 13)
supply current
(pin 13)
chrominance
input voltage
(pin 15)
(peak-to-peak
value)
see note 1
10.8 12 13.2 V
−
60 −
mA
20 200 400 mV
Colour difference output signals (see note 2)
V_1(p-p)
V_3(p-p)
−(R−Y) output
(peak-to-peak
value)
−(B−Y) output
(peak-to-peak
value)
PAL
NTSC
SECAM
PAL
NTSC
SECAM
442 525 624 mV
370 440 523 mV
883 1050 1248 mV
559 665 791 mV
468 557 662 mV
1119 1330 1581 mV
Notes to quick reference data
1. Within 3 dB output voltage deviation.
2. Burst key width for PAL 4.3 µs, for NTSC 3.6 µs
Burst width for PAL and NTSC 2.25 µs, ratio burst-chrominance-amplitude
1/2.2.
ORDERING INFORMATION
EXTENDED
TYPE NUMBER _PINS
TDA4651
28
TDA4651WP 28
PIN
POSITION
DIL
PLCC
PACKAGE
MATERIAL
plastic
plastic
Note
1. SOT117-1; 1996 November 25.
2. SOT261-2; 1996 November 25.
CODE
SOT117⁽¹⁾
SOT261CG⁽²⁾
August 1993
2