PHILIPS TDA8755T

INTEGRATED CIRCUITS
DATA SHEET
TDA8755
YUV 8-bit video low-power
analog-to-digital interface
Product specification
Supersedes data of June 1994
File under Integrated Circuits, IC02
Philips Semiconductors
1995 Mar 09
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
TDA8755
FEATURES
APPLICATIONS
• 8-bit resolution
• High speed analog-to-digital conversion for video signal
digitizing
• Sampling rate up to 20 MHz
• 100 Hz improved definition TV (IDTV).
• TTL compatible digital inputs
• 3-state TTL outputs
• U, V two's complement outputs
GENERAL DESCRIPTION
• Y binary output
The TDA8755 is a bipolar 8-bit video low-power
analog-to-digital conversion (ADC) interface for YUV
signals. The device converts the YUV analog input signal
into 8-bit coded digital words in a 4 : 1 : 1 format at a
sampling rate of 20 MHz. The U/V signals are converted in
a multiplexed manner. All analog signal inputs are digitally
clamped and a fast precharge is provided for start-up.
All digital inputs and outputs are TTL compatible. Frame
synchronization is supported in a multiplexed manner.
• Power dissipation of 550 mW (typical)
• Low analog input capacitance, no buffer amplifier
required
• High signal-to-noise ratio over a large analog input
frequency range
• Track-and-hold included
• Clamp functions included
• UV multiplexed ADC
• 4 : 1 : 1 output data encoder
• Stable voltage regulator included.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VCCA
analog supply voltage
4.75
5.0
5.25
V
VCCD
digital supply voltage
4.75
5.0
5.25
V
VCCO
output stages supply voltage
4.75
5.0
5.25
V
ICCA
analog supply current
−
46
55
mA
ICCD
digital supply current
−
55
66
mA
ICCO
output stages supply current
−
9
12
mA
INL
DC integral non-linearity
fclk = 2 MHz
−
±0.4
±1
LSB
DNL
DC differential non-linearity
fclk = 2 MHz
−
±0.3
±0.5
LSB
EB
effective bits
−
7.1
−
bits
fclk(max)
maximum clock frequency
20
−
−
MHz
Ptot
total power dissipation
−
550
700
mW
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
TDA8755T
1995 Mar 09
PINS
PIN POSITION
MATERIAL
CODE
32
SO32L
plastic
SOT287-1
2
3
INV
CLPV
CLPU
INU
CLP
CLPY
INY
9
12
11
7
15
5
3
32
6
23
VCCO
10
AGND
CLAMP
V
CLAMP
U
TRACK
AND
HOLD
TRACK
AND
HOLD
DIGITAL
MULTIPLEXER
CLAMP
LOGIC
SUPPLY AND REFERENCE
VOLTAGE REGULATOR
VCCD
8
8-BIT
ADC
8
8
21
22
19
20
16
14
17
31
24
MLA734 - 1
TTL
I/O
TTL
I/O
13
REG3
TDA8755
U AND V
DATA
ENCODER
4
REG2
8-BIT
PIPELINE
TIMING GENERATOR
8-BIT
ADC
COMPARATOR
128
TRACK
AND
HOLD
TRACK
AND
HOLD
2
REG1
D'3
2 D'0
D'1
2 D'2
HREF
CE
CLK
8 D0
D7
U
V
Y
YUV 8-bit video low-power
analog-to-digital interface
Fig.1 Block diagram.
1
n.c.
COMPARATOR
16
CLAMP
Y
8
SDN
ANALOG
MULTIPLEXER
18
DGND
handbook, full pagewidth
1995 Mar 09
VCCA
Philips Semiconductors
Product specification
TDA8755
BLOCK DIAGRAM
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
TDA8755
PINNING
SYMBOL
PIN
DESCRIPTION
n.c.
1
not connected
REG1
2
decoupling input (internal
stabilization loop decoupling)
INY
3
Y analog voltage input
REG2
4
decoupling input (internal
stabilization loop decoupling)
CLPY
5
Y clamp capacitor connection
VCCA
6
analog positive supply voltage
(+5 V)
INU
7
U analog voltage input
SDN
8
stabilizer decoupling node and
analog reference voltage (+3.35 V)
INV
9
V analog voltage input
AGND
10
analog ground
CLPU
11
handbook, halfpage
n.c.
1
32 VCCD
REG1
2
31 D7
INY
3
30 D6
REG2
4
29 D5
U clamp capacitor connection
CLPY
5
28 D4
6
27 D3
26 D2
CLPV
12
V clamp capacitor connection
VCCA
REG3
13
decoupling input (internal
stabilization loop decoupling)
INU
7
CE
14
chip enable input (TTL level input
active LOW)
SDN
8
25 D1
TDA8755
INV
24 D0
9
CLP
15
clamp control input
AGND 10
23 V CCO
HREF
16
horizontal reference signal
CLPU
11
22 D'3
CLK
17
clock input
CLPV 12
21 D'2
DGND
18
digital ground
REG3 13
20 D'1
D'0
19
V data output; bit 0 (n−1)
D'1
20
V data output; bit 1 (n)
D'2
21
U data output; bit 0 (n−1)
D'3
22
U data output; bit 1 (n)
VCCO
23
positive supply voltage for output
stages (+5 V)
D0
24
Y data output; bit 0 (LSB)
D1
25
Y data output; bit 1
D2
26
Y data output; bit 2
D3
27
Y data output; bit 3
D4
28
Y data output; bit 4
D5
29
Y data output; bit 5
D6
30
Y data output; bit 6
D7
31
Y data output; bit 7 (MSB)
VCCD
32
digital positive supply voltage (+5 V)
1995 Mar 09
19
CE 14
D'0
18 DGND
CLP 15
HREF 16
17 CLK
MLA728 - 1
Fig.2 Pin configuration.
4
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
TDA8755
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC134).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
VCCA
analog supply voltage
−0.3
+7.0
V
VCCD
digital supply voltage
−0.3
+7.0
V
VCCO
output stages supply voltage
−0.3
+7.0
V
∆VCC
supply voltage difference between VCCA and VCCD
−1.0
+1.0
V
supply voltage difference between VCCO and VCCD
−1.0
+1.0
V
supply voltage difference between VCCA and VCCO
−1.0
+1.0
V
V
VI
input voltage
referenced to AGND
−
+5.0
Vclk(p-p)
AC input voltage for switching (peak-to-peak value)
referenced to DGND
−
VCCD
V
IO
output current
−
+6
mA
Tstg
storage temperature
−55
+150
°C
Tamb
operating ambient temperature
0
+70
°C
Tj
junction temperature
−
+150
°C
HANDLING
Inputs and outputs are protected against electrostatic discharges in normal handling. However, to be totally safe, it is
desirable to take normal precautions appropriate to handling integrated circuits.
THERMAL CHARACTERISTICS
SYMBOL
Rth j-a
1995 Mar 09
PARAMETER
thermal resistance from junction to ambient in free air
5
VALUE
UNIT
70
K/W
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
TDA8755
CHARACTERISTICS
VCCA = V6 to V10 = 4.75 to 5.25 V; VCCD = V32 to V18 = 4.75 to 5.25 V; VCCO = V23 to V18 = 4.75 to 5.25 V;
AGND and DGND shorted together; VCCA to VCCD = −0.25 to +0.25 V; VCCO to VCCD = −0.25 to +0.25 V;
VCCA to VCCO = −0.25 to +0.25 V; Tamb = 0 to +70 °C; typical values measured at VCCA = VCCD = VCCO = 5 V and
Tamb = 25 °C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
VCCA
analog supply voltage
4.75
5.0
5.25
V
VCCD
digital supply voltage
4.75
5.0
5.25
V
VCCO
output stages supply voltage
4.75
5.0
5.25
V
ICCA
analog supply current
−
46
55
mA
ICCD
digital supply current
−
55
66
mA
ICCO
output stages supply current
−
9
12
mA
VIL
LOW level input voltage
0
−
0.8
V
Inputs
CLK (PIN 17)
VIH
HIGH level input voltage
2.0
−
VCCD
V
IIL
LOW level input current
Vclk = 0.4 V
−400
−
−
µA
IIH
HIGH level input current
Vclk = 2.7 V
−
−
100
µA
ZI
input impedance
fclk = 20 MHz
−
4
−
kΩ
CI
input capacitance
fclk = 20 MHz
−
4.5
−
pF
CE, CLP AND HREF (PINS 14 TO 16)
VIL
LOW level input voltage
0
−
0.8
V
VIH
HIGH level input voltage
2.0
−
VCCD
V
IIL
LOW level input current
Vclk = 0.4 V
−400
−
−
µA
IIH
HIGH level input current
Vclk = 2.7 V
−
−
100
µA
CLPY (PIN 5)
V5
clamp voltage for 16 output code
−
3.725
−
V
I5
clamp output current
−
±50
−
µA
CLPU AND CLPV (PINS 11 AND 12)
V11, 12
clamp voltage for 128 output code
−
3.30
−
V
I11, 12
clamp output current
−
±50
−
µA
INY (PIN 3)
VI(p-p)
input voltage, full range
(peak-to-peak value)
fi = 4.43 MHz
0.93
1.0
1.07
V
ZI
input impedance
fi = 6 MHz
−
30
−
kΩ
CI
input capacitance
fi = 6 MHz
−
1
−
pF
1995 Mar 09
6
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
SYMBOL
PARAMETER
TDA8755
CONDITIONS
MIN.
TYP.
MAX.
UNIT
INU AND INV (PINS 7 AND 9)
VI(p-p)
input voltage, full range
(peak-to-peak value)
fi = 1.5 MHz
0.93
1.03
1.13
V
ZI
input impedance
fi = 2 MHz
−
30
−
kΩ
CI
input capacitance
fi = 2 MHz
−
1
−
pF
crosstalk between Y, U and V
−
−55
−50
dB
Vref
reference voltage
−
3.32
−
V
VREG
line regulation
−
4.0
−
mV
IL
load current
−2
−
−
mA
IO = 0.4 mA
0
−
0.4
V
IO = 1.5 mA
0
−
0.5
V
INPUTS ISOLATION
αct
Outputs
SDN (PIN 8)
4.75 V ≤ VCCA ≤ 5.25 V
DIGITAL OUTPUTS D0 TO D7 AND D’0 TO D’3 (PINS 24 TO 31 AND 19 TO 22)
VOL
LOW level output voltage
VOH
HIGH level output voltage
IO = −0.4 mA
2.4
−
VCCD
V
IOZ
output current in 3-state mode
0.4 V < VO < VCCD
−20
−
+20
µA
Switching characteristics
fclk(max)
maximum clock frequency
20
−
−
MHz
fclk(min)
minimum clock frequency
−
−
2.0
MHz
tCPH
clock pulse width HIGH
20
−
−
ns
tCPL
clock pulse width LOW
20
−
−
ns
Analog signal processing (fclk = 20 MHz; 50% clock duty factor)
Gdiff
differential gain
note 1; see Fig.8
−
2
−
%
ϕdiff
differential phase
note 1; see Fig.8
−
3
−
deg
f1
fundamental harmonics (full-scale) note 2
−
−
0
dB
fall
harmonics (full-scale),
all components
note 2; see Fig.10
−
−54
−
dB
SVRR1
supply voltage ripple rejection 1
note 3
−
−40
−
dB
SVRR2
supply voltage ripple rejection 2
note 3
−
1.0
−
%/V
fclk = 2 MHz
−
±0.4
±1.0
LSB
Transfer function (50% clock duty factor)
INL
DC integral non-linearity
DNL
DC differential non-linearity
fclk = 2 MHz
−
±0.3
±0.5
LSB
AILE
AC integral non-linearity
note 4
−
±1.0
±2.0
LSB
EB
effective bits
note 5; Fig.10
−
7.1
−
bits
1995 Mar 09
7
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
SYMBOL
PARAMETER
TDA8755
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Timing (fclk = 20 MHz); note 6; see Figs 3 to 7
tds
sampling delay time
−
1
−
ns
th
output hold time
7
−
−
ns
td
output delay time
−
33
42
ns
tdZH
3-state output delay time
enable-to-HIGH
−
10
14
ns
tdZL
3-state output delay time
enable-to-LOW
−
10
14
ns
tdHZ
3-state output delay time
disable-to-HIGH
−
8
11
ns
tdLZ
3-state output delay time
disable-to-LOW
−
4
6
ns
tr
clock rise time
3
5
−
ns
tf
clock fall time
3
5
−
ns
tsu
HREF set-up time
7
−
−
ns
th
HREF hold time
3
−
−
ns
tr
data output rise time
−
12
−
ns
tf
data output fall time
−
16
−
ns
tCLP
minimum time for active clamp
3
−
−
µs
note 7; see Fig.9
Notes
1. Low frequency ramp signal (VI(p-p) = full-scale and 64 µs period) combined with a sinewave input voltage
(VI(p-p) = 0.25 full-scale, fi = maximum permitted frequency) at the input.
2. The input conditions are related as follows:
a) Y channel: VI(p-p) = 1.0 V; fi = 4.43 MHz
b) U/V channel: VI(p-p) = 1.0 V; fi = 1.5 MHz.
3. Supply voltage ripple rejection:
a) SVRR1 is the variation of the input voltage producing output code 127 (code 15) for supply voltage variation
of 0.5 V:
∆V I ( 127 )
SVRR1 = 20 log ---------------------∆V CCA
b) SVRR2 is the relative variation of the full-scale range of analog input for a supply voltage variation of 0.5 V:
∆ ( V I ( 0 ) – V I ( 255 ) )
1
SVVR2 = ------------------------------------------------ × -----------------V I ( 0 ) – V I ( 255 )
∆V CCA
4. Full-scale sinewave (fi = 4.43 MHz for Y and fi = 1.5 MHz for U and V; fclk = 20 MHz).
5. The number of effective bits is measured using a 20 MHz clock frequency. This value is given for a 4.43 MHz input
frequency on the Y channel (1.5 MHz on the U and V channels). This value is obtained via a Fast Fourier Transform
(FFT) treatment taking 4 × Tclk (clock periods) acquisition points per period. The calculation takes into account all
harmonics and noise up to half of the clock frequency (NYQUIST frequency).
Conversion to signal-to-noise ratio: S/N = EB × 6.02 + 1.76 dB.
6. Output data acquisition is available after the maximum delay time of td.
7. U and V output data is not valid during tCLP.
1995 Mar 09
8
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
Table 1
Table 2
TDA8755
Mode selection
CE
D7 TO D0; D’3 TO D’0
1
high impedance
0
active; binary
Output data coding
OUTPUT PORT
BIT
Y
D7
Y07
Y17
Y27
Y37
D6
Y06
Y16
Y26
Y36
D5
Y05
Y15
Y25
Y35
D4
Y04
Y14
Y24
Y34
D3
Y03
Y13
Y23
Y33
D2
Y02
Y12
Y22
Y32
D1
Y01
Y11
Y21
Y31
D0
Y00
Y10
Y20
Y30
U
V
t CPH
OUTPUT DATA
D’3
U07
U05
U03
U 01
D’2
U06
U04
U02
U 00
D’1
V07
V05
V03
V01
D’0
V06
V04
V02
V00
t CPL
andbook, full pagewidth
1.4 V
CLK
sample N
V
sample N 1
sample N 2
sample N 3
sample N 4
sample N 5
l
th
t ds
2.4 V
D0 to D7
DATA
N 4
DATA
N 3
DATA
N 2
DATA
N 1
DATA
N
DATA
N 1
1.4 V
0.4 V
td
Fig.3 Timing diagram (INY signal).
1995 Mar 09
9
MSA646
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
TDA8755
V CCD
andbook, full pagewidth
50 %
CE
t dHZ
t dZH
HIGH
90 %
output
data
50 %
t dLZ
LOW
t dZL
HIGH
output
data
50 %
LOW
TEST
10 %
V CCD
3.3 kΩ
S1
TDA8755
15 pF
tdLZ
VCCD
tdZL
VCCD
tdHZ
GND
tdZH
GND
MBD874
CE
fCE = 100 kHz.
Fig.4 Timing diagram and test conditions of 3-state output delay time.
handbook, halfpage
TDA8755
test probe
TEK P6201
D0 to D7
15 pF
MLA733 - 1
Fig.5
1995 Mar 09
Load circuit for the 3-state output timing
measurement.
10
S1
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
handbook, full pagewidth
TDA8755
sample N
CLK
1
sample N 4
2
4
3
5
HREF
sample N
output data valid
t su
output
data
N 4
N 3
N 2
N 1
th
MLA732 - 1
N
The output data is valid 4 clock periods after HREF goes HIGH.
Fig.6 Timing definition for set-up and hold times (HREF signal).
4 clock periods (Tclk )
handbook, full pagewidth
sample N
sample N 4 x T clk
CLK
HREF
sample N 4 (Tclk 1)
output data valid
output
data
N 4
N 3
N 3
MLA731 - 1
When the HREF period is a multiple of 4 clock periods, the output data is valid without any clock delay.
The internal circuit always gives an internal delay of 4 clock periods as illustrated in Fig.6.
Fig.7 Timing diagram (HREF signal).
1995 Mar 09
11
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
TDA8755
handbook, full pagewidth
0.3 V
Y, U and V
channel
1.2 V
0.3 V
64 µs
MSA644
Y channel = 4.43 MHz sinewave.
U, V channel = 1.5 MHz sinewave.
Fig.8 Input test signal for differential gain and phase measurements.
handbook, full pagewidthdigital
MSA645
output
level
255
black-level
clamping
Y : 16
U,V : 128
0
time
t CLP
CLP
Fig.9 Clamping control timing.
1995 Mar 09
12
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
TDA8755
MBD873
0
handbook, full pagewidth
amplitude
(dB)
20
40
60
80
100
120
0
1.25
2.50
3.75
5.00
6.25
7.50
Effective bits: 7.30; THD = −53.35 dB.
Harmonic levels (dB): 2nd = −58.38; 3rd = −60.03; 4th = −57.30; 5th = −69.38; 6th = −67.09.
Fig.10 Fast Fourier Transform (fclk = 20 MHz; fi = 4.43 MHz).
1995 Mar 09
13
8.75
f (MHz)
10.00
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
TDA8755
APPLICATION INFORMATION
n.c.
andbook, full pagewidth
10 nF
AGND
1
32
VCCD
5V
10 nF
REG1
2
31
3
30
4
29
5
28
6
27
7
26
8
25
D7
DGND
INY
(3)
D6
4.7 µF
REG2
AGND
D5
220 nF
AGND
CLPY
(1)
VCCA
5V
D4
D3
10 nF
INU
(3)
4.7 µF
SDN
+ 3.35 V
(2)
10 nF
D1
TDA8755
INV
(3)
D2
9
24
10
23
4.7 µF
AGND
D0
VCCO
5V
10 nF
AGND
CLPU
(1)
11
22
D'3
DGND
CLPV
AGND
(1)
REG3
AGND
12
21
13
20
14
19
15
18
16
17
D'2
D'1
220 nF
CE
CLP
HREF
D'0
DGND
CLK
MLA735 - 1
The analog and digital supplies should be separated and decoupled.
(1) Clamp capacitors must be determined in accordance with the application; recommended values are CLPY = 18 nF, CLPU and CLPV = 33 nF.
(2) It is possible to use the reference output voltage pin SDN to drive other analog circuits under the limits indicated in Chapter “Characteristics”.
(3) Input signal pins have a high bandwidth. It is necessary to take special care on PCB layout to avoid any interaction from other signals (digital clocks
for example).
Fig.11 Application diagram.
1995 Mar 09
14
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
TDA8755
andbook, full pagewidth
Y
12
U
VDRAM
1 x TMS4C2970
12
NOISE
REDUCTION
INCLUDING
CROSS-COLOUR
REDUCTION
TDA8755
VDRAM
1 x TMS4C2970
V
12
SAA4940
12
SAA7158
Y
U
12
VIDEO
ENHANCEMENT,
LFR
PROCESSING V
AND DACs
2
to
video
processor
2
12
12/13.5/16/18 MHz
VCO1
control
32/36 MHz
VCO2A
MEMORY
CONTROLLER
SAA4951
VSYNC
27 MHz
SC1
control
I2 C
H2, V2
(32 kHz/100 Hz)
2
VCO2B
data
8
MICROCONTROLLER
PCB83C652
2
µC bus
MSA642
Fig.12 Block diagram of a full-options Improved Picture Quality (IPQ) module.
1995 Mar 09
15
to
deflection
processor
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
TDA8755
andbook, full pagewidth
Y
U
VDRAM
1x
TMS4C2970
12
TDA8755
V
12
Y
VIDEO
ENHANCEMENT
AND
DACs
U
SAA7165
V
to
video
processor
2
2
I C bus
12/13.5/16/18 MHz
VCO1
control
32/36 MHz
VCO2A
MEMORY
CONTROLLER
SAA4951
VSYNC
27 MHz
SC1
control
I2 C
H2, V2
(32 kHz/100 Hz)
2
data
8
VCO2B
MSA643
MICROCONTROLLER
PCB83C652
Fig.13 Block diagram of an economic Improved Picture Quality (IPQ) module.
1995 Mar 09
16
to
deflection
processor
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
TDA8755
PACKAGE OUTLINE
handbook, plastic
full pagewidth
SO32:
small outline package; 32 leads; body width 7.5 mm
SOT287-1
D
E
A
X
c
y
HE
v M A
Z
17
32
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
L
16
1
0
detail X
w M
bp
e
5
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
Z (1)
mm
2.65
0.3
0.1
2.45
2.25
0.25
0.49
0.36
0.27
0.18
20.7
20.3
7.6
7.4
1.27
10.65
10.00
1.4
1.1
0.4
1.2
1.0
0.25
0.25
0.1
0.95
0.55
inches
0.10
0.012 0.096
0.004 0.086
0.01
0.02
0.01
0.011
0.007
0.81
0.80
0.30
0.29
0.050
0.42
0.39
0.055
0.043
0.016
0.047
0.039
0.01
0.01
0.004
0.037
0.022
θ
8o
0o
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
OUTLINE
VERSION
REFERENCES
IEC
JEDEC
EIAJ
ISSUE DATE
92-11-17
95-01-25
SOT287-1
1995 Mar 09
EUROPEAN
PROJECTION
17
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
TDA8755
Several techniques exist for reflowing; for example,
thermal conduction by heated belt, infrared, and
vapour-phase reflow. Dwell times vary between 50 and
300 s according to method. Typical reflow temperatures
range from 215 to 250 °C.
SOLDERING
Plastic small outline packages
BY WAVE
During placement and before soldering, the component
must be fixed with a droplet of adhesive. After curing the
adhesive, the component can be soldered. The adhesive
can be applied by screen printing, pin transfer or syringe
dispensing.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 min at 45 °C.
REPAIRING SOLDERED JOINTS (BY HAND-HELD SOLDERING
IRON OR PULSE-HEATED SOLDER TOOL)
Maximum permissible solder temperature is 260 °C, and
maximum duration of package immersion in solder bath is
10 s, if allowed to cool to less than 150 °C within 6 s.
Typical dwell time is 4 s at 250 °C.
Fix the component by first soldering two, diagonally
opposite, end pins. Apply the heating tool to the flat part of
the pin only. Contact time must be limited to 10 s at up to
300 °C. When using proper tools, all other pins can be
soldered in one operation within 2 to 5 s at between 270
and 320 °C. (Pulse-heated soldering is not recommended
for SO packages.)
A modified wave soldering technique is recommended
using two solder waves (dual-wave), in which a turbulent
wave with high upward pressure is followed by a smooth
laminar wave. Using a mildly-activated flux eliminates the
need for removal of corrosive residues in most
applications.
For pulse-heated solder tool (resistance) soldering of VSO
packages, solder is applied to the substrate by dipping or
by an extra thick tin/lead plating before package
placement.
BY SOLDER PASTE REFLOW
Reflow soldering requires the solder paste (a suspension
of fine solder particles, flux and binding agent) to be
applied to the substrate by screen printing, stencilling or
pressure-syringe dispensing before device placement.
DEFINITIONS
Data sheet status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This data sheet contains final product specifications.
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.
1995 Mar 09
18
Philips Semiconductors
Product specification
YUV 8-bit video low-power
analog-to-digital interface
TDA8755
NOTES
1995 Mar 09
19
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SCD38
© Philips Electronics N.V. 1995
All rights are reserved. Reproduction in whole or in part is prohibited without the
prior written consent of the copyright owner.
The information presented in this document does not form part of any quotation
or contract, is believed to be accurate and reliable and may be changed without
notice. No liability will be accepted by the publisher for any consequence of its
use. Publication thereof does not convey nor imply any license under patent- or
other industrial or intellectual property rights.
Printed in The Netherlands
533061/30/03/pp20
Document order number:
Date of release: 1995 Mar 09
9397 750 00027