The chrominance and identification demodulators of the TDA3592A both share the same reference tuned circuit (pins 23
and 24). The identification circuit automatically detects whether the incoming signal is SECAM or SECAM (NTSC, PAL
or black-and-white).
When the incoming signals are PAL they are diverted via pin 16 to the chrominance output at pin 14 and no signal
demodulation takes place. The delay line connected to pin 16 delays the signals to equalize the delay of the SECAM-PAL
transcoding process. When SECAM signals are received, the PAL signal path is switched off.
Incoming SECAM signals are applied to pin 3 via an external bell filter. The signals are amplified, limited and then
demodulated. Only one demodulator is necessary as the colour difference signals are available sequentially. After
demodulation the colour difference signals are separated by an H/2 switch and then applied to (R-Y) and (B-Y) clamp
circuits where the black levels are clamped to the same DC level. With all conditions at pin 4, artificial black levels are
inserted during the horizontal blanking periods. This is done because of the possibility of horizontal burst signals not
being available. The artificial levels may not be identical to the detected black level due to circuit spread but this can be
corrected by detuning the reference tuned circuit.
January 19884
Page 5
Philips SemiconductorsProduct specification
SECAM-PAL transcoderTDA3592A
The two colour difference signals are combined again after clamping and then applied to the modulator via de-emphasis,
blanking and reinsertion circuits. The ratio of (R-Y) to (B-Y) at the de-emphasis output (pin 20) is 1,78.
Modulation
A burst signal is reinserted into the combined SECAM signal at the input to the PAL modulator. At this input the phase
relationship for magenta colour is +(R-Y) and−(B-Y). The modulation carriers for the (R-Y) and (B-Y) signals are 90° out
of phase; for a magenta colour the modulated (R-Y) component has the same phase position as the (R-Y) burst. The
(B-Y) burst is modulated 180° out of phase with respect to the (B-Y) component of a magenta-coloured input signal.
Identification SECAM/SECAM
Identification of the SECAM signal is performed using the fact that only SECAM signals have a line-to-line difference in
voltage level. The identification circuit compares the phase of the demodulated voltage difference waveform with the
phase of the flip-flop output. If the phase relationship is not correct, the flip-flop is reset by an extra pulse from the flip-flop
trigger generator. For horizontal identification the phase comparison is performed during the period of pulse ‘B’ (see
Fig.2). When vertical identification is selected, the comparison is performed only during the horizontal scan of the vertical
blanking. The SECAM identification circuits operate when selected by the voltage on pin 4; this may be horizontal, vertical
or combined horizontal and vertical identification, depending on the switching arrangements of pin 4.
These are as follows:
• Horizontal identification preset when V
• Vertical identification preset when V
• Horizontal/vertical combination when sandcastle pulse is present on pin 4.
4-1
< 2,9 V;
4-1
> 4,1 V;
Information obtained from the identification detector is also used for colour killing and, if required, for switching to PAL.
January 19885
Page 6
Philips SemiconductorsProduct specification
SECAM-PAL transcoderTDA3592A
Sandcastle pulse detection
The sandcastle pulse detector requires a three-level sandcastle pulse to provide horizontal blanking, vertical blanking
and burst gate pulses. The detector burst gate pulse triggers a pulse generator which produces two timing pulses, pulse
‘A’ and pulse ‘B’ (see Fig.2). Pulse ‘A’ is used to time the PAL modulator burst and to sample the (R-Y) and (B-Y)
clamping pulse generators. A (R-Y) clamping pulse is generated only during a red line and a (B-Y) clamping pulse only
during a blue line. Pulse ‘B’ times the SECAM horizontal identification.
Fig.2 Burst gate timing pulse generation.
Carrier generation
The carrier signal for the PAL modulator is obtained from a 4,43 MHz oscillator. An internal Miller integrator operates in
conjunction with the decoupling capacitor at pin 10 to provide the required 90° phase shift.
PAL matrix
The signal output from the PAL modulator at pin 9 is sequentially modulated with (R-Y) burst phased in the +(R-Y)
direction, and (B-Y) burst phased in the −(B-Y) direction. This PAL signal is applied directly to pin 11 and via a 64 µs
delay to pin 12. A true PAL signal is constructed in the PAL matrix by means of an additional/substraction process (in a
correct H/2 sequence) using the delayed and undelayed inputs.
January 19886
Page 7
Philips SemiconductorsProduct specification
SECAM-PAL transcoderTDA3592A
Coupling of identification systems
Coupling of a TDA3592A and a PAL decoder can be performed to obtain an optimum identification system. The system
operates using the functions of pins 13, 6 and 7: the voltage level at pin 13 is controlled by the PAL/PAL detection of the
PAL decoder; and the voltage level at pins 6 and 7 are functions of SECAM/SECAM detection in the TDA3592A.
The circuit action is as follows and is summarized in Table 1.
Channel switchingDuring channel switching pin 6 is taken rapidly to a high voltage (± 10,2 V), this corresponds
to the
SECAM mode of the TDA3592A.
PALThe high voltage level at pin 6 caused by channel switching is maintained by the TDA3592A
when it recognizes the signal as
signals are present). The PAL decoder recognizes the signal as PAL and takes pin 13 of
TDA3592A to a voltage greater than 1,7 V. The TDA3592A is now held in the SECAM
condition by an internal current source at pin 6.
SECAMThe initial high voltage level (+ 10,2 V) at pin 6 caused by channel switching sets the
TDA3592A in the
This causes a voltage at pin 13 of < 1,1 V which prevents the internal current source of
TDA3592A maintaining the high voltage level of pin 6 which, in turn, allows the TDA3592A to
detect SECAM. The initiation of SECAM detection is delayed by the action of the external
circuit at pins 6 and 7 and commences as pin 6 approaches 7,0 V. The SECAM signals are
converted by TDA3592A to PAL signals at pin 14, which results in the PAL decoder switching
to the PAL mode (the TDA3592A remains in the SECAM mode).
Black-and-whiteThe TDA3592A is initially set in the
detects P AL and the TDA3592A detects SECAM which results in a system operation in the
colour-killing mode.
SECAM mode and during this time the PAL decoder detects a PAL signal.
SECAM (this condition is maintained even if reflected PAL
SECAM mode as previously described. The P AL decoder
When TDA3592A pin 13 is connected to the PAL/
identification. Connecting TDA3592A pin 13 to ground will give SECAM priority.
Luminance and chrominance signal paths
The signal input at pin 16 is clamped by a circuit which detects the top of the luminance signal sync pulse. This clamp,
the luminance signal path to pin 15 and the
(typ.) 5 V. At this level of supply voltage the SECAM processing circuits are switched off, giving a reduction in total power
dissipation.
PALcondition not used
PAL output of a PAL decoder, the system will give PAL priority in signal
SECAM signal path to pin 14 remain active when the supply voltage falls to
January 19887
Page 8
Philips SemiconductorsProduct specification
SECAM-PAL transcoderTDA3592A
RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134)
PARAMETERSYMBOLMIN.MAX.UNIT
Supply voltage (pin 17)V
Total power dissipationP
Operating ambient temperature rangeT
Storage temperature rangeT
P
tot
amb
stg
CHARACTERISTICS
V
P=V17−1
= 12 V; T
=25°C; unless otherwise specified.
amb
The parameter values are valid only when the reference tuned circuit has been aligned as detailed in note 1. All
voltages are reference to ground pin 1.
PARAMETERCONDITIONSSYMBOLMIN.TYP.MAX.UNIT
Supplies
Supply voltage (pin 17)V
Supply current (pin 17)I
Supply current (pin 18)I
Decoupled supply voltage (pin 18)R
ext17−18
=2 kΩ V
External capacitance (pin 18)C
Total power dissipationP
(R-Y)/(B-Y) ratio (pin 9)1,501,782,11
Chrominance/burst ratio for
SECAM (pin 9)2,53,03,5
Linearity of (B-Y) signal (pin 9)note 3859299%
Linearity of (R-Y) signal (pin 9)note 493100107%
Black level shift as a function of
temperature (pin 9)
(R-Y) signalsnote 9−0,22−kHz/°C
(B-Y) signalsnote 9−0,22−kHz/°C
−30100µA
−1,21,7V
6,57,58,5dB
−1,05,0µA
−20−Ω
6,07,08,0dB
2,0−−kΩ
−25−Ω
−9,6−V
2−−kΩ
−0,82−mV
January 198810
Page 11
Philips SemiconductorsProduct specification
SECAM-PAL transcoderTDA3592A
PARAMETERCONDITIONSSYMBOLMIN.TYP.MAX.UNIT
Phase relationship of modulated
(R-Y) burst to modulated
(B-Y) burst (pin 9)879093deg
Amplitude relationship of
modulated (R-Y) burst to
modulated (B-Y) burst (pin 9)−1,50+1,5dB
Black level shift as a function of
supply voltage (pin 9)
(R-Y) signal−−1,5−kHz/V
(B-Y) signal−1,0−kHz/V
Oscillator
Oscillator frequency (pin 9)
(set with series capacitor)f
OSC
Frequency deviation without
spread of external components
(pin 9)∆f
OSC
Temperature coefficient of
oscillator frequency (pin 9)−−2 −3Hz/°C
Frequency deviation for change
of V
from 9,0 to 13,2 V∆f
P
DC voltage (pin 8)V
Input resistance (pin 8)R
DC voltage (pin 10)V
Input resistance (pin 10)R
resistance (pin 14)R
External load resistor (pin 14)R
DC voltage (pin 11)V
DC voltage (pin 12)V
DC voltage (pin 14)SECAM modeV
DC voltage (pin 14)
SECAM mode
INT(14)
L(14)
11
12
14
and
line blankingV
14
−4,433619−MHz
−−±150Hz
−−150Hz
−4,7−V
−1−kΩ
−4,4−V
−2−kΩ
7009001100Ω
7009001100Ω
−40−Ω
−7−kΩ
2,4−−kΩ
−5,0−V
−5,0−V
−6,2−V
−4,9−V
January 198811
Page 12
Philips SemiconductorsProduct specification
SECAM-PAL transcoderTDA3592A
PARAMETERCONDITIONSSYMBOLMIN.TYP.MAX.UNIT
H/2 ripple on chrominance
output (pin 14)
(peak-to-peak value)SECAM modeV
Gain A; pin 11 to 14G
14(p-p)
A
Gain B; pin 12 to 14
((R-Y) at pin 9)G
B
Gain C; pin 12 to 14
((B-Y) at pin 9)G
Gain A − gain BG
Gain A − gain CG
Gain B − gain CG
C
A−GB
A−GC
B−GC
Phase A; pins 11, 14 to
pins 12, 14 ((R-Y) at pin 9)−181,5−deg
Phase B; pins 11, 14 to
pins 12, 14 ((B-Y) at pin 9)−1,5−deg
Phase A − phase B178180182deg
−−100mV
910 11dB
910 11dB
910 11dB
−0,7−+0,7dB
−0,7−+0,7dB
−0,7−+0,7dB
Identification PAL/
PAL
Input condition for PAL (pin 13)V
Input condition for
Input currentV
Input resistanceV
PAL (pin 13)V
=6 VI
13
= 8,2 VR
13
Pin 6 internal current in
PAL/SECAM mode−I
Switching level PAL/
PAL
(pin 13)V
13
13
13
13
6
13
1,7−V
−−1,1V
−−10µA
7,511,515,5kΩ
0,240,40,58mA
1,21,41,6V
V
P
January 198812
Page 13
Philips SemiconductorsProduct specification
SECAM-PAL transcoderTDA3592A
CHARACTERISTICS AT LOW SUPPLY VOLTAGE
V
P=V17−1
= 5 V; T
PARAMETERCONDITIONSSYMBOLMIN.TYP.MAX.UNIT
Supplies
Supply currentI
Supply voltage switching level for
preset SECAM signal pathSECAM processing
Luminance amplifier
Input signal (peak-to-peak value)V
Gain (pin 16 to 15)f
Input current (pin 16)I
Output impedance (pin 15)|Z
Minimum load resistance (pin 15)R
Frequency response at −3 dB
(pin 16 to 15)f6,0−−MHz
Gain (pin 16 to 14)f
Frequency response at −3 dB
(pin 16 to 14)f6−−MHz
=25°C; unless otherwise specified
amb
OFFV
= 4,4 MHzG
16
= 4,4 MHzG
16
17+I18
17−1
16(p-p)
16−15
16
|−20−Ω
15−1
L
16−14
162024mA
6,57,58,2V
−0,450,56V
6,07,08,0dB
−1,05,0µA
2−−kΩ
5,76,87,9dB
January 198813
Page 14
Philips SemiconductorsProduct specification
z
SECAM-PAL transcoderTDA3592A
Notes to the characteristics
1. The parameter values given in the characteristics are valid only when the following alignment procedure is
performed:
a) Supply a SECAM signal input to pin 3 at 100 mV (peak-to-peak value) without deviation during a red and blue
line (SECAM black colour information).
b) Align the reference tuned circuit so that the output signal from pin 14 to the PAL decoder is minimum during scan
(PAL black colour information).
2. When the input signal to the limiter (pin 3) changes from 300 to 15 mV (peak-to-peak value) the zero point of the
chrominance demodulator shifts by a typical value of 5 kHz; f = 4,33 MHz (typ.).
A = demodulated black level at temperature X
B = demodulated black level at temperature Y
C = artificial black level at temperature X
D = artificial black level at temperature Y
E1 = demodulated output signal at temperature X (f
o
−∆f)
E2 = demodulated output signal at temperature X (fo+∆f)
F1 = demodulated output signal at temperature Y (fo−∆f)
F2 = demodulated output signal at temperature Y (fo+ ∆f)
for B-Y: fo= fob= 4,25 MHz (∆f = 230 kHz)
for R-Y: fo= for= 4,40625 MHz (∆f = 280 kHz)
6. During stable signal conditions V7 is always at VF(BAT85) below V6.
7. The burst gate pulse width > 3,45 µs.
8. The specification figures are only valid when the reference tuned circuit is aligned as indicated in note 1.
9. Ensure that the 4,433 MHz carrier is in the correct phase; black level shift at temperature X = A and at Y = B.
Output signal (∆f = 230 kHz for B-Y; ∆f = 280 kHz for R-Y) at temperature X = E and at Y = F.
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
A
A
A
UNIT
inches
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
max.
mm
OUTLINE
VERSION
SOT101-1
12
min.
max.
1.7
1.3
0.066
0.051
IEC JEDEC EIAJ
051G02MO-015AD
b
b
1
0.53
0.38
0.021
0.015
0.32
0.23
0.013
0.009
REFERENCES
cD E eM
32.0
31.4
1.26
1.24
January 198816
12
14.1
13.7
0.56
0.54
(1)(1)
e
L
3.9
3.4
EUROPEAN
PROJECTION
M
15.80
15.24
0.62
0.60
E
17.15
15.90
0.68
0.63
1
0.15
0.13
H
w
0.252.5415.24
0.010.100.60
ISSUE DATE
92-11-17
95-01-23
Z
max.
2.25.10.514.0
0.0870.200.0200.16
(1)
Page 17
Philips SemiconductorsProduct specification
SECAM-PAL transcoderTDA3592A
SOLDERING
Introduction
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
“IC Package Databook”
our
Soldering by dipping or by wave
The maximum permissible temperature of the solder is
260 °C; solder at this temperature must not be in contact
DEFINITIONS
Data sheet status
Objective specificationThis data sheet contains target or goal specifications for product development.
Preliminary specificationThis data sheet contains preliminary data; supplementary data may be published later.
Product specificationThis data sheet contains final product specifications.
(order code 9398 652 90011).
with the joint for more than 5 seconds. The total contact
time of successive solder waves must not exceed
5 seconds.
The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (T
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.
Repairing soldered joints
Apply a low voltage soldering iron (less than 24 V) to the
lead(s) of the package, below the seating plane or not
more than 2 mm above it. If the temperature of the
soldering iron bit is less than 300 °C it may remain in
contact for up to 10 seconds. If the bit temperature is
between 300 and 400 °C, contact may be up to 5 seconds.
stg max
). If the
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
January 198817
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