Philips tda8310 DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

TDA8310

PAL/NTSC colour processor for
PIP applications

Preliminary specification
File under Integrated Circuits, IC02

Philips Semiconductors

February 1995

Philips Semiconductors Preliminary specification

PAL/NTSC colour processor for
PIP applications

FEATURES

• Multistandard vision IF circuit (positive and negative
modulation)

• Video switch which automatically detects whether the
incoming signal is CVBS or Y/C

• Integrated chrominance trap and bandpass filters
(automatically calibrated)

• Integrated luminance delay line

• Automatic PAL/NTSC decoder which can decode all

standards available in the world

• Easy interfacing with the TDA8395 (SECAM decoder)
for multistandard applications

• Horizontal PLL with an alignment-free horizontal
oscillator

• Vertical count-down circuit

• RGB/YUV and fast blanking switch with 3-state output

and active clamping

• Low dissipation (560 mW)

• Small amount of peripheral components compared with

competition ICs.

TDA8310

GENERAL DESCRIPTION

The TDA8310 is an alignment-free PAL/NTSC colour
processor for Picture-in-Picture (PIP) applications. The
circuit contains a vision IF amplifier, a PAL/NTSC colour
decoder, horizontal and vertical synchronization and an
RGB/YUV switch.

As input for the colour decoder and sync processor the
demodulated IF signal can be chosen but the circuit also
has a video input which automatically detects whether the
incoming signal is CVBS or Y/C. The output signals for the
PIP processor are:

Luminance signal
Colour difference signals (U and V)
Horizontal and vertical synchronization pulses.

The RGB/YUV switch can select between two RGB or
YUV sources, e.g. between the PIP processor and the
SCART input signal.

The supply voltage for the IC is 8 V. It is available in a
52-pin SDIP package.

ORDERING INFORMATION

TYPE NUMBER

NAME DESCRIPTION VERSION

TDA8310 SDIP52 plastic shrink dual in-line package; 52 leads (600 mil) SOT247-1

PACKAGE

February 1995 2

Philips Semiconductors Preliminary specification

PAL/NTSC colour processor for
PIP applications

QUICK REFERENCE DATA

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

V

P

I

P

Input voltages

V

i(rms)

V

17,20(p-p)

V

16(p-p)

V

i(p-p)

Output signals

V

o(p-p)

V

29

V

o(p-p)

V

50(p-p)

V

51(p-p)

V

39

V

36

G

v

Control voltage

V

control

supply voltage (pins 19 and 41) 7.2 8.0 8.8 V
supply current − 70 − mA

vision IF amplifier input sensitivity (RMS value) − 70 100 µV
CVBS/Y input voltage (peak-to-peak value) − 1 1.4 V
chrominance input voltage (peak-to-peak value) − 0.3 − V
RGB/YUV input signal voltage amplitude

−−1.3 V

(peak-to-peak value)

demodulated CVBS output voltage

− 2.5 − V

(peak-to-peak value)
tuner AGC control output voltage 0 − 12 V
luminance output voltage (peak-to-peak value) − 1.4 − V
(B−Y) output voltage (peak-to-peak value) 1.06 1.33 1.60 V
(R−Y) output voltage (peak-to-peak value) 0.84 1.05 1.26 V
horizontal sync pulse output voltage − 4 − V
vertical sync pulse output voltage − 4 − V
voltage gain of the RGB switches −0.5 0 +0.5 dB

control voltage for HUE 0 − 5V

TDA8310

February 1995 3

Philips Semiconductors Preliminary specification

PAL/NTSC colour processor for
PIP applications

BLOCK DIAGRAM

BLANK1

13B112G111R110

40

SAND

GENERATOR

SANDCASTLE

36

VOUT

39

HOUT

PULSE

SHAPER

+

VCO

CONTROL

PHASE

DETECTOR

V

V

P1

P2

( 8 V)

( 8 V)

sw

CVBS

DIG

DEC

BG

DEC

PH1LF

19

41

21

35

37

CLAMP

14

SWITCH

RGB/YUV

DIVIDER

VERTICAL

HORIZONTAL/

SYNC

VERTICAL

SEPARATOR

SYNC

SEPARATOR

BLANK

5B6G7R8

1

TDA8310

BLANK2

B23G22R2

4

52

FILTER

TUNING

TRAP

CHROMINANCE

BANDPASS

CHROMINANCE

HUE

IDENT

REF

28

Y

49

DELAY LINE

LUMINANCE

PAL/NTSC

DECODER

INPUT

SELECTOR

MBE245

18 38

50 51

23

24

25

27 26

42

43

41

46 45

48

47

16

917

20

22

XTAL1

XTAL2

XTAL3

PLL XTAL4

GND1 GND2

R Y

B Y

LOGIC2

LOGIC1

COLOUR2

COLOUR1

R/W

0

SECAM

1

CHROMA

sw

CHROMA

SYST

EXT

CVBS

INT

CVBS

VIDEO

TDA8310

handbook, full pagewidth

Fig.1 Block diagram.

February 1995 4

NOISE

DETECTOR

COINCIDENCE/

31

ADJ

TUNER

IF AND

AGC FOR

29

AGC

TUNER

TUNER

30

AGC

C

VIF

AMPLIFIER

DEMODULATOR

34

33

IF2

IF1

15

FT

DEC

VIDEO

AMPLIFIER

Y/C

DETECTOR

AUTOMATIC

Philips Semiconductors Preliminary specification

PAL/NTSC colour processor for
PIP applications

PINNING

SYMBOL PIN DESCRIPTION

R2 1 RED input 2 (PIP)
G2 2 GREEN input 2 (PIP)
B2 3 BLUE input 2 (PIP)
IDENT 4 colour standard identification output
BLANK 5 blanking output
B 6 BLUE output
G 7 GREEN output
R 8 RED output
SYST

SW

R1 10 RED input 1
G1 11 GREEN input 1
B1 12 BLUE input 1
BLANK1 13 blanking input 1
CLAMP 14 clamping pulse input
DEC

FT

CHROMA
CVBS

EXT

GND1 18 ground 1 (0 V)
V

P1

CVBS

INT

DEC

DIG

VIDEO 22 IF video output
LOGIC2 23 crystal logic 2 input/output
LOGIC1 24 crystal logic 1 input/output
COLOUR2 25 colour system logic 2 input/output
COLOUR1 26 colour system logic 1 input/output
R/W 27 read/write selection input

9 system switch

15 decoupling filter tuning
16 chrominance input

I

17 external CVBS input

19 supply voltage 1 (+8 V)
20 internal CVBS input
21 decoupling digital supply

TDA8310

SYMBOL PIN DESCRIPTION

HUE 28 HUE control input
TUNER
C

AGC

TUNER
CVBS

SW

IF1 33 IF input 1
IF2 34 IF input 2
DEC

BG

VOUT 36 vertical sync output pulse
PH1LF 37 phase 1 loop filter
GND2 38 ground 2 (0 V)
HOUT 39 horizontal sync output pulse
SAND 40 sandcastle pulse output
V

P2

XTAL1 42 4.4336 MHz crystal
XTAL2 43 3.5820 MHz crystal for PAL-N
XTAL3 44 3.5756 MHz crystal for PAL-M
XTAL4 45 3.5795 MHz crystal for NTSC
PLL 46 PLL colour filter
CHROMA
SECAM 48 SECAM reference output
Y 49 Y output
B−Y50B−Y output
R−Y51R−Y output
BLANK2 52 blanking/insertion input 2 (PIP)

29 tuner AGC output

AGC

30 AGC filter capacitor
31 tuner take-over adjustment input

ADJ

32 CVBS positive/negative modulation

control switch input

35 bandgap decoupling

41 supply voltage 2 (+8 V)

47 chrominance output for TDA8395

O

February 1995 5

Philips Semiconductors Preliminary specification

PAL/NTSC colour processor for
PIP applications

handbook, halfpage

R2

G2

B2

IDENT

BLANK

SYST

SW

R1

G1

B1

BLANK1

CLAMP
DEC

FT

CHROMA

CVBS

EXT

GND1

V

P1

CVBS

INT

DEC

DIG

VIDEO
LOGIC2
LOGIC1

COLOUR2

COLOUR1

B
G
R

I

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

TDA8310

MBE244

52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27

BLANK2
R Y
B Y
Y
SECAM
CHROMA
PLL
XTAL4
XTAL3
XTAL2
XTAL1
V

P2

SAND
HOUT
GND2
PH1LF
VOUT
DEC

BG

IF2
IF1
CVBS

SW

TUNER
C

AGC

TUNER
HUE
R/W

TDA8310

O

ADJ

AGC

February 1995 6

Fig.2 Pin configuration.

Philips Semiconductors Preliminary specification

PAL/NTSC colour processor for
PIP applications

FUNCTIONAL DESCRIPTION
Vision IF amplifier

The IF amplifier contains three AC-coupled control stages
with a total gain control range >60 dB. The sensitivity of
the circuit is comparable with that of modern IF-ICs. The
demodulation of the IF signal is achieved by a multiplier.
The demodulator is alignment-free and does not require
external components.

The polarity of the demodulator can be switched to make
the circuit suitable for positive and negative modulated
signals.

The AGC detector operates on top-sync or top white-level
depending on the position of the demodulator. The AGC
detector time-constant capacitor is externally connected to
facilitate flexibility of the application. During positive
modulation the time-constant of the AGC system is too
long to avoid visible variations of the signal amplitude. To
obtain an acceptable speed of the AGC system a circuit
has been included which detects whether the AGC
detector is activated every frame period. When no action
is detected during three frame periods the speed of the
system is increased.

Synchronization circuit

The sync separator is preceded by a voltage controlled
amplifier which adjusts the sync pulse amplitude to a fixed
level. The sync pulses are then fed to the slicing stage
(separator) which operates at 50% of the amplitude.

The separated sync pulses are fed to the first phase
detector and to the coincidence detector. The coincidence
detector is used to detect whether the line oscillator is
synchronized and for transmitter identification. The first
PLL has a very high static steepness, this ensures that the
phase of the picture is independent of the line frequency.
The line oscillator operates at twice the line frequency.

The oscillator network is internal. Because of the spread of
internal components an automatic adjustment circuit has
been added to the IC.

The circuit compares the oscillator frequency with that of
the crystal oscillator in the colour decoder. This results in
a free-running frequency which deviates less than 2% from
the typical value.

The horizontal output pulse is derived from the horizontal
oscillator via a pulse shaper. The pulse width of the output
pulse is 5.4 µs, the front edge of this pulse coincides with
the front edge of the sync pulse at the input.

TDA8310

The vertical output pulse is generated by a count-down
circuit. The pulse width is approximately 380 µs. Both the
horizontal and vertical pulses will always be available at
the outputs even when no input signal is available.

In addition to the horizontal and vertical sync pulse outputs
the IC has a sandcastle pulse output which contains burst
key and blanking pulses.

Integrated video filters

The circuit contains a chrominance bandpass and trap
circuit. The filters are realised by gyrator circuits that are
automatically tuned by comparing the tuning frequency
with the crystal frequency of the decoder. When a Y/C
signal is supplied to the input the chrominance trap is
automatically switched off by the Y/C detection circuit, but
it is also possible to force the filters in the CVBS or Y/C
position.

The luminance delay line is also realised by gyrator
circuits.

Colour decoder

The colour decoder contains an alignment-free crystal
oscillator, a colour killer circuit and colour difference
demodulators. The 90° phase shift for the reference signal
is achieved internally.

The colour decoder is very flexible. Together with the
SECAM decoder TDA8395 an automatic multistandard
decoder can be designed but it is also possible to use it for
one standard when only one crystal is connected to the IC.
The decoder can be forced to one of the standards via the
“forced mode” pins. The crystal pins which are not used
must be connected to the positive supply line via a 8.2 kΩ
resistor. It is also possible to connect the non-used pins
with one resistor to the positive supply line. In this event
the resistor must have a value of 8.2 kΩ divided by the
number of pins.

The chrominance output signal of the video switch is
externally available and must be used as an input signal
for the SECAM decoder.

RGB/YUV switch

The RGB/YUV switch is for switching between two RGB or
YUV video sources. The outputs of the switch can be set
to high impedance state so that other switches can be
used in parallel.

The switch is controlled via pins 13 and 52. The details of
switch control are shown in Table 5.

February 1995 7