13.4Repairing soldered joints
14DEFINITIONS
15LIFE SUPPORT APPLICATIONS
16PURCHASE OF PHILIPS I2C COMPONENTS
1998 Apr 212
Page 3
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
1FEATURES
• Field rate up-conversion (50 to 100 Hz or 60 to 120 Hz)
• 4:1:1 digital input
• Digital Colour Transient Improvement (DCTI)
• Digital luminance peaking
• Triple 10-bit Digital-to-Analog Converter (DAC)
• Memory controller
• Embedded microprocessor
• 16 kbyte ROM
• 256 byte RAM
2
C-bus interface
• I
• Synchronous No parity Eight bit Reception and
Transmission (SNERT) interface.
2GENERAL DESCRIPTION
The SAA4974H is a video processing IC providing a digital
YUV 4:1:1 input interface, analog YUV output, video
enhancing features, memory controlling and an embedded
80C51 microprocessor core. It is applicable especially for
field rate up-conversion (50 to 100 Hz or 60 to 120 Hz) in
cooperation with a 2.9 Mbit field memory. It is designed for
applications together with:
analog supply voltage3.153.33.45V
digital supply voltage3.03.33.6V
I/O supply voltage4.55.05.5V
analog supply current−2540mA
digital supply current−5070mA
I/O supply current−1020mA
total power dissipation−−0.5W
operating ambient temperature−20−+70°C
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1998 Apr 214
8
YI7 to YI0
51 to 58
VARIABLE
Y-DELAY
ok, full pagewidth
Y-PEAKING
79
BLANKING
YOUT
5BLOCK DIAGRAM
Besic without ADCSAA4974H
Philips SemiconductorsProduct specification
UVI7 to UVI4
TMS
TRST
ANATEST
4
59 to 62
15
49
30
SAA4974H
TEST
CONTROL
BLOCK
REFORMATTER
MEMORY CONTROL
(ACQUISITION)
47
33
SWC
LLA
CONTROL
INTERFACE
22HA20
WE
VA
UP-CONVERSION
4 : 1 : 1
TO
4 : 2 : 2
70
24
32
LLD
RSTW
DCTI
UP-CONVERSION
4 : 2 : 2
TO
4 : 4 : 4
CONTROL
INTERFACE
MEMORY CONTROL
(DISPLAY)
71
IE2
BLND
66
HDFL
VDFL
63RE64
72
HRD
689
RST
SIDEPANELS
OVERLAY
ROM
MICROPROCESSOR
I/O
PORT
3 to 7
5
P1.5
to
P1.1
SNDA
SNERT-
BUS
13
12
SNCL
TRIPLE
10-BIT DAC
RAM
102
SDA
SNRST
I2C-
BUS
1
SCL
76
UOUT
74
VOUT
MGM687
Fig.1 Block diagram.
Page 5
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
6PINNING INFORMATION
6.1Pinning
handbook, full pagewidth
SDA
SCL
P1.5
P1.4
P1.3
P1.2
P1.1
V
DDD1
RST
SNRST
V
DDD2
SNDA
SNCL
V
SSD1
TMS
V
SSIO1
V
DDIO1
V
SSD2
RSTW
n.c.
n.c.
VA
HA
n.c.
DDA2
V
YOUT
80
79
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
SSA3
V
78
SSA2
V
77
UOUT
76
DDA1
V
75
SSA1
VOUT
V
74
73
SAA4974H
VDFL
72
HDFL
71
LLD
70
DDD3
V
69
HRD
68
DDIO3
V
67
BLND
66
SSIO3
V
65
IE2
64
RE
63
UVI4
62
UVI5
61
UVI6
60
UVI7
59
YI0
58
YI1
57
YI2
56
YI3
55
YI4
54
YI5
53
YI6
52
YI7
51
V
50
SSD3
49
TRST
V
48
SSIO2
SWC
47
V
46
DDIO2
n.c.
45
n.c.
44
n.c.
43
n.c.
42
n.c.
41
25
n.c.
26
n.c.
27
n.c.
28
n.c.
29
n.c.
30
ANATEST
31
n.c.
32
WE
Fig.2 Pin configuration.
1998 Apr 215
33
LLA
34
n.c.
35
n.c.
36
n.c.
37
n.c.
38
n.c.
39
n.c.
40
n.c.
MGM688
Page 6
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
6.2Pin description
Table 1 SOT318-2 package
SYMBOLPINDESCRIPTION
SDA1I
SCL2I
P1.53Port 1 data input/output signal 5
P1.44Port 1 data input/output signal 4
P1.35Port 1 data input/output signal 3
P1.26Port 1 data input/output signal 2
P1.17Port 1 data input/output signal 1
V
DDD1
8digital supply voltage 1 (3.3 V)
RST9microprocessor reset input
SNRST10SNERT restart (port 1.0)
V
DDD2
11digital supply voltage 2 (3.3 V)
SNDA12SNERT data
SNCL13SNERT clock
V
SSD1
14digital ground 1
TMS15test mode select
V
SSIO1
16I/O ground 1
n.c.17not connected
V
DDIO1
18I/O supply voltage 1 (5 V)
n.c.19not connected
VA20vertical synchronization input, acquisition part
V
YI751Y digital input bit 7 (MSB)
YI652Y digital input bit 6
YI553Y digital input bit 5
YI454Y digital input bit 4
YI355Y digital input bit 3
YI256Y digital input bit 2
YI157Y digital input bit 1
YI058Y digital input bit 0
UVI759U digital input bit 1
UVI660U digital input bit 0
UVI561V digital input bit 1
UVI462V digital input bit 0
RE63read enable signal output, memory 1
IE264input enable signal output, memory 2
V
SSIO3
BLND66horizontal blanking signal output, display part
V
DDIO3
HRD68horizontal reference signal output, deflection part
V
DDD3
LLD70display clock input
HDFL71horizontal synchronization signal output, deflection part
VDFL72vertical synchronization signal output, deflection part
V
SSA1
VOUT74V analog output
V
DDA1
UOUT76U analog output
V
SSA2
46I/O supply voltage 2 (5 V)
48I/O ground 2
50digital ground 3
65I/O ground 3
67I/O supply voltage 3 (5 V)
69digital supply voltage 3 (3.3 V)
73analog ground 1
75analog supply voltage 1 (3.3 V)
77analog ground 2
1998 Apr 217
Page 8
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
SYMBOLPINDESCRIPTION
V
SSA3
YOUT79Y analog output
V
DDA2
7FUNCTIONAL DESCRIPTION
7.1Digital processing at 2f
7.1.14:1:1
An up-converter to 4:2:2 is applied with a linear
interpolation filter for creation of the extra samples. These
are combined with the original samples from the 4 :1:1
stream.
7.1.2DCTI
The Digital Colour Transient Improvement (DCTI) is
intended for U and V signals originating from a 4:1:1
source. Horizontal transients are detected and enhanced
without overshoots by differentiating, make absolute and
again differentiating the U and V signals separately. This
results in a 4:4:4 UandV bandwidth. To prevent third
harmonic distortion, typical for this processing, a so called
over the hill protection prevents peak signals to become
distorted.
78analog ground 3
80analog supply voltage 2 (3.3 V)
level
H
TO 4:2:2UP-CONVERSION
2
Via I
C-bus it is possible to control: gain width (see Fig.4),
threshold (i.e. immunity against noise), selection of simple
or improved first differentiating filter (see Fig.3), limit for
pixel shift range (see Fig.5), common or separate
processing of U and V signals, hill protection mode (i.e. no
discolourations in narrow colour gaps), low-pass filtering
for U and V signals (see Fig.6) and a so called super hill
mode, which avoids discolourations in transients within a
colour component.
1998 Apr 218
Page 9
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
(1) dcti_ddx_sel = 1.
(2) dcti_ddx_sel = 0.
Fig.3 DCTI first differentiating filter; transfer function with variation of control signal dcti_ddx_sel.
signal
amplitude
0.8
0.6
0.4
0.2
1
0
00.25
handbook, halfpage
(2)(1)
0.050.10.150.2
MGM689
f/f
s
handbook, full pagewidth
(1) Input signal.
(2) Gain = 1.
(3) Gain = 3.
(4) Gain = 5.
(5) Gain = 7.
digital
signal
amplitude
500
400
300
200
100
−100
−200
−300
−400
−500
MGM690
(1)
(4)
(5)
0
(2)
(3)
samples
Fig.4 DCTI with variation of gain setting (limit = 1).
Fig.5 DCTI with variation of limit setting (gain = 7).
1.2
handbook, halfpage
signal
amplitude
0.8
0.4
0
00.5
0.10.20.30.4
Fig.6 DCTI post-filter transfer function.
1998 Apr 2110
MGM692
f/f
s
Page 11
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
7.1.3Y-PEAKING
A linear peaking is applied, which amplifies the luminance
signal in the middle and the upper ranges of the
bandwidth.
The filtering is an addition of:
• The original signal
• The original signal band-passed with centre
frequency =1⁄4f
s
• The original signal high-passed with maximum gain at
frequency =1⁄2fs.
12
handbook, halfpage
10
IH_PeakingI
(dB)
8
6
4
(1)
(2)
(3)
(4)
MGE097
The band-passed and high-passed signals are weighted
1
with factors 0,
⁄8,1⁄4 and1⁄2. The impulse response
becomes [−α, −β, 1 + 2α +2β,−β, −α], where α is the
band-pass weighting factor and β the high-pass weighting
factor.
Coring is added to obtain no gain for low amplitudes in the
(high-pass + band-pass) signal, which is then considered
to be noise. Coring levels can be programmed as 0 (off),
+1/−2, +3/−4 and +7/−8 LSB at 8-bit word.
12
handbook, halfpage
10
IH_PeakingI
(dB)
8
6
4
(1)
(2)
(3)
(4)
MGE098
2
0
0
(1) β =1⁄2.
(2) β =1⁄4.
(3) β =1⁄8.
(4) β =0.
1/4f
s
1/2f
Fig.7Peaking transfer function with variation of β
(α =1⁄8).
2
0
s
(1) β =1⁄2.
(2) β =1⁄4.
(3) β =1⁄8.
(4) β =0.
0
1/4f
s
1/2f
s
Fig.8Peaking transfer function with variation of β
(α =1⁄4).
1998 Apr 2111
Page 12
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
MGE099
(1)
(2)
(3)
(4)
handbook, halfpage
IH_PeakingI
(dB)
(1) β =1⁄2.
(2) β =1⁄4.
(3) β =1⁄8.
(4) β =0.
16
14
12
10
8
6
4
2
0
0
1/4f
s
Fig.9Peaking transfer function with variation of β
(α =1⁄2).
1/2f
12
handbook, halfpage
10
IH_PeakingI
(dB)
8
6
4
2
0
s
(1) β =1⁄2.
(2) β =1⁄4.
(3) β =1⁄8.
0
1/4f
(1)
(2)
(3)
s
MGE100
1/2f
s
Fig.10 Peaking transfer function with variation of β
(α = 0).
7.1.4Y-DELAY
The Y samples can be shifted onto 8 positions with
reference to the UV samples. This shift is meant to account
for a possible difference in delay previous to the
SAA4974H. The zero delay setting is suitable for the
nominal case of aligned input data according to the
interface format standard. The other settings provide one
to seven samples less delay in Y.
7.1.5S
IDEPANELS AND BLANKING
Sidepanels are generated by switching Y and the 4 MSB
of U and V to certain programmable values. The start and
stop values for the sidepanels with reference to the rising
edge of the HRD signal are programmable in a resolution
of 4 LLD clock cycles. In addition a fine shift of 0 to 3 LLD
clock cycles of both values can be achieved.
Blanking is done by switching Y to value 64 at 10-bit word
and UV to value 0 (in twos complement). Blanking is
controlled by a composite signal HVBDA, existing of a
horizontal part HBDA and a vertical part VBDA. Set and
reset value of the horizontal control signal HBDA are
programmable with reference to the rising edge of the
HRD signal, set and reset value of the vertical control
signal VBDA are programmable with reference to the
rising edge of the VA signal.
The range of the Y output signal can be selected between
9 and 10 bits. In case of 9 bits for the nominal signal there
is room left for under and overshoot (adding up to a total of
10 bits). In case of selecting all 10 bits of the luminance
Digital-to-Analog Converter (DAC) for the nominal signal
any under or overshoot will be clipped. In case of selecting
9 bits of the luminance DAC for the nominal signal under
or overshoots are limited within a programmable range
(see Fig.12).
7.2Digital-to-analog conversion
Three identical 10-bit DACs are used to map the 4 : 4 : 4
data to analog levels.
7.3Microprocessor
The SAA4974H contains an embedded
80C51 microprocessor core including 256 byte RAM and
16 kbyte ROM. The microprocessor runs on a 16 MHz
clock, generated by dividing the 32 MHz display clock by a
factor of 2. For controlling internal registers a host
interface, consisting of a parallel address and data bus, is
1998 Apr 2112
Page 13
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
built in, that can be addressed as internal AUXRAM via
MOVX type of instruction.
2
7.3.1I
C-BUS
The I2C-bus interface in the SAA4974H is used in a slave
receive and transmit mode for communication with in
general a central system microprocessor.
The standardized bus frequencies of both 100 kHz and
400 kHz can be dealt with.
The I2C-bus slave address of the SAA4974H is
0110100R/W.
For a detailed description of the transmission protocol
refer to brochure
9398 393 40011) and to Application Note
specification of the SAA4974H”
7.3.2SNERT-
“I2C-bus and how to use it”
“I2C-bus register
(AN97042).
BUS
(order number
A SNERT interface is built in, which operates in a master
receive and transmit mode for communication with
peripheral circuits as SAA4990H or SAA4991WP.
The SNERT interface replaces the standard UART
interface. In contrary to the 8051 UART interface there are
additional special function registers and there is no byte
separation time between address and data.
The SNERT interface transforms the parallel data from the
microprocessor into 1 Mbaud SNERT data.
The SNERT-bus consists of three signals: SNCL used as
serial clock signal, generated by the SNERT interface;
SNDA used as bidirectional data line, and SNRST used as
reset signal, generated by the microprocessor to indicate
the start of a transmission.
The read or write operation must be set by the
microprocessor. In case of writing to the bus, 2 bytes are
loaded by the microprocessor: one for the address, the
other for the data. In case of reading from the bus, one
byte is loaded by the microprocessor for the address, the
received byte is the data from the addressed SNERT
location.
7.3.3I/O-
PORTS
A parallel 8-bit I/O-port (P1) is available, where P1.0 is
used as SNERT reset signal (SNRST), P1.1 to P1.5 can
be used for application specific control signals, and
P1.6 and P1.7 are used as I2C-bus signals (SCL and
SDA).
7.3.4W
ATCHDOG TIMER
The microprocessor contains an internal Watchdog timer,
which can be activated by setting the corresponding
special function register PCON.4. Only a synchronous
reset will clear this bit. To prevent a system reset the
watchdog timer must be reloaded in time. The Watchdog
timer is incremented every 0.75 ms. The time interval
between the timer’s reloading and the occurrence of a
reset depends on the reloaded 8-bit value.
7.4Memory controller
The memory controller provides all necessary acquisition
clock related write signals (WE and RSTW) and display
clock related read signals (RE and IE2) to control one or
two-field memory concepts. Furthermore the drive signals
(HDFL and VDFL) for the horizontal and vertical deflection
power stages are generated. Also a horizontal blanking
pulse BLND is generated which can be used for peripheral
circuits as SAA4990H. The memory controller is
connected to the microprocessor via the host interface.
Start and stop values for all pulses, referring to the
corresponding horizontal or vertical reference signal, are
programmable under control of the internal software.
To allow an user access to these control signals via
2
I
C-bus a range of subaddresses is reserved; for a
detailed description of this user interface refer to
Application Note
SAA4974H”
“I2C-bus register specification of the
(AN97042).
7.4.1WE
The write enable signal for field memory 1 is a composite
signal consisting of a horizontal and a vertical part.
The horizontal position with reference to the rising edge of
the HA signal and the vertical position with reference to the
rising edge of the VA signal are programmable.
7.4.2RSTW
Reset write signal for field memory 1; this signal is derived
from the positive edge of the VA input signal and has a
pulse width of 64 µs.
7.4.3RE
The read enable signal for field memory 1 is a composite
signal consisting of a horizontal and a vertical part.
The horizontal position with reference to the rising edge of
the HA signal and the vertical position with reference to the
rising edge of the VA signal are programmable.
1998 Apr 2113
Page 14
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
7.4.4IE2
Input enable signal for field memory 2, can be directly set
or reset by the microprocessor.
7.4.5HDFL
Horizontal deflection signal for driving an deflection circuit;
this signal has a cycle time of 32 µs and a pulse width of
76 LLD clock cycles.
7.4.6VDFL
Vertical deflection signal for driving a deflection circuit; this
signal has a cycle time of 10 ms; start and stop value with
reference to the rising edge of the VA signal is
programmable in steps of 16 µs.
7.4.7BLND
Horizontal blanking signal for peripheral circuits e.g.
SAA4990H, start and stop values with reference to the
rising edge of HRD are programmable.
7.5Clock and sync interfacing
The line locked acquisition clock LLA and the line locked
display clock LLD must be provided by the application.
Also an acquisition clock synchronous line frequent signal
must be provided by the application at pin HA. A vertical
50 or 60 Hz synchronization signal has to be applied on
pin VA.
Typically the circuit operates as a two clock system, i.e.
LLA has to be supplied with a 16 MHz clock and LLD with
a 32 MHz clock. The circuit can also operate as a one
clock system, i.e. a 32 MHz line locked display clock has
to be provided to both pins LLA and LLD. In this case the
internal horizontal pixel counter is reset by the rising edge
of the HA input, and the corresponding control signal
2
en_hdsp_rst has to be set via the I
C-bus.
A display clock synchronous line frequent signal is put out
at pin HRD providing a duty factor of 50%. The rising edge
of HRD is also the reference for display related control
signals as BLND, RE, HDAV and HBDA.
7.64:1:1 digital input interfacing
Digital input bus format
The start position, when the first phase of the 4 :1:1 YUV
dataword is expected on the input bus, can be defined by
the internal control signal HDAV. The luminance input
signal is expected in 8-bit straight binary format, whereas
U and V input signals are expected in twos complement
format. U and V input signals are inverted if the
corresponding control bit uv_inv is set via the I
2
C-bus.
7.7Test mode operation
The SAA4974H provides a test mode function which
should be avoided to be entered by the customer. If the
TRST input is driven to HIGH, different test modes can be
selected by applying HIGH to the TMS input for a defined
number of LLD clock cycles. Also the ANATEST input is
only active during test mode operation. To exit the test
mode TMS and TRST must be driven LOW.
The acquisition clock is buffered internally and put out as
serial write clock (SWC) for supplying the field memory.
1998 Apr 2114
Page 15
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
7.8I2C-bus control registers
ADDRESSBITNAMEDESCRIPTION
Subaddress 00H to 35H: reserved; note 1
Subaddress 36H and 37H (DCTI)
36H0 to 2dcti_gainDCTI gain: 0, 1, 2, 3, 4, 5, 6 and 7
3 to 6dcti_thresholdDCTI threshold: 0 and 1 to 15
7dcti_ddx_selDCTI selection of first differentiating filter; see Fig.3
37H0 and 1 dcti_limitDCTI limit for pixel shift range: 0, 1, 2 and 3
2dcti_separateDCTI separate processing of U and V signals; 0 = off and 1 = on
3dcti_protectionDCTI over the hill protection; 0 = off and 1 = on
4dcti_filteronDCTI post-filter; 0 = off and 1 = on
5dcti_superhillDCTI super hill mode; 0 = off and 1 = on
6 and 7 −reserved
Subaddress 3AH and 3BH (sidepanels overlay)
3AH0 to 3overlay_usidepanels overlay U (4 MSB)
4 to 7overlay_vsidepanels overlay V (4 MSB)
3BH0 to 7overlay_ysidepanels overlay Y (8 MSB)
Subaddress 3CH (peaking)
3CH0 and 1 peak_αpeaking settings α: 0,
2 and 3 peak_βpeaking settings β: 0,1⁄8,1⁄4 and1⁄
1
⁄8,1⁄4 and1⁄
2
2
4 and 5 peak_limitpeaking limiter settings in display mode = 0:
(256/767, 171/852, 86/937 and 0/1023)
6 and 7 peak_coringpeaking coring settings: 0, +1/−2, +3/−4 and +7/−8 LSB at 8-bit word
Subaddress 3DH to 3FH (sidepanel position)
3DH0 to 7sidepanel_start sidepanel start position (8 MSB) with reference to the rising edge of
HRD signal
3EH0 to 7sidepanel_stop sidepanel stop position (8 MSB) with reference to the rising edge of
HRD signal
3FH0 and 1 sidepanel_fdelfine delay of sidepanel signal in LLD clock cycles: (0, 1, 2 and 3)
2display_modedisplay mode (display mode = 0: 9-bit for the nominal output signal,
black level 288 and white level 767; display mode = 1: 10-bit for the nominal
output signal, black level 64 and white level 1023)
3uv_invinverts UV input signals: 0 = no inversion, 1 = inversion
4 to 6ydelay_outvariable Y-delay in LLD clock cycles: −7, −6, −5, −4, −3, −2, −1 and 0
7en_hdsp_rstenable hdsp reset: 0 = disable and 1 = enable
Note
2
1. Detailed information about the software dependent I
register specification of the SAA4974H”
(AN97042).
C-bus registers can be found in Application Note
“I2C-bus
1998 Apr 2115
Page 16
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
8LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOLPARAMETERMIN.MAX.UNIT
V
DDA(1,2)
V
DDD(1,2,3)
V
DDIO(1,2,3)
V
i
T
stg
T
amb
9THERMAL CHARACTERISTICS
SYMBOLPARAMETERCONDITIONSVALUEUNIT
R
th(j-a)
analog supply voltage−0.5+3.45V
digital supply voltage−0.5+3.6V
digital I/O supply voltage−0.5+5.5V
input voltage for all I/O pins−0.5+5.5V
storage temperature−20+150°C
operating ambient temperature−20+70°C
thermal resistance from junction to ambientin free air53K/W
1998 Apr 2116
Page 17
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
10 CHARACTERISTICS
V
= 3.0 to 3.6 V; V
DDD
SYMBOLPARAMETERCONDITIONSMIN.TYP.MAX.UNIT
Supply
V
DDA(1,2)
V
DDD(1,2,3)
V
DDIO(1,2,3)
I
DDA(1,2)
I
DDD(1,2,3)
I
DDIO(1,2,3)
analog supply voltage3.153.33.45V
digital supply voltage3.03.33.6V
I/O supply voltage4.55.05.5V
analog supply current−2540mA
digital supply current−5070mA
I/O supply current−1020mA
Dissipation
P
tot
total power dissipation−−0.5W
Luminance output signal (display_mode = 0: Y black level digital 288, white level digital 767;
display_mode = 1: Y black level digital 64, white level digital 1023); see Fig.12
V
LOW-level output voltage3 mA sink current−−0.4V
SCL clock frequency−−400kHz
hold time START condition0.6−− µs
SCL LOW time1.3−− µs
SCL HIGH time0.6−− µs
data set-up time100−− ns
data set-up time (before
0.6−− µs
repeated START condition)
data set-up time (before STOP
0.6−− µs
condition)
set-up time repeated START0.6−− µs
set-up time STOP condition0.6−− µs
1998 Apr 2119
Page 20
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
SYMBOLPARAMETERCONDITIONSMIN.TYP.MAX.UNIT
SNERT-bus: SNDA and SNCL; note 3
V
OH
V
OL
V
IH
V
IL
t
su(i)
t
h(i)
t
cycle
t
h(o)
Notes
1. Supply voltage ripple rejection, measured over a frequency range from 20 Hz to 50 kHz. This includes1⁄2fV, fV, 2fV,
fH and 2fH which are major load frequencies: SVR is relative variation of the full scale analog input for a supply
variation of 0.25 V.
2. The AC characteristics are in accordance with the I2C-bus specification for fast mode (clock frequency maximum
400 kHz). Information about the I2C-bus can be found in brochure
9398 393 40011).
3. More information about the SNERT-bus protocol can be found in Application Note
(AN95127).
The SAA4974H supports two different up-converter
concepts. The simple one is shown in Fig.13. In this
application only one field memory SAA4955TJ is needed
for a 100 Hz conversion based on a field repetition
algorithm (AABB mode). The concept can be upgraded by
a noise reduction based on a motion adaptive field
recursive filter if the SAA4956TJ is used instead of the
SAA4955TJ.
The SAA4974H supports a dual-clock system.
The acquisition clock is taken from the digital front-end.
The display control is based on a clock generated by an
external H-PLL. By this structure the stability of the display
is enhanced compared to a one-clock system if an
unstable source like a VCR is used as an input.
For low-cost applications it is possible to run the IC as a
one-clock system.
937
852
767
peak_limit = 3
peak_limit = 2
peak_limit = 1
288
256
171
86
0
peak_limit = 0
MGM693
The second system supported by the SAA4974H is shown
in Fig.14. This concept needs two field memories
(SAA4955TJ) and the signal processing IC MELZONIC
(SAA4991WP). The SAA4991WP allows a vector based
motion estimation and compensation for a display of
100 Hz pictures in high-end TV sets which is free of motion
artefacts. It additionally provides a variable vertical zoom
function, noise and cross colour reduction. Furthermore a
multi-PIP feature is supported making use of the field
memories.
1998 Apr 2121
Page 22
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
handbook, full pagewidth
YIN7 to YIN0
UVIN7 to UVIN4
LLA
+3.3 V
19, 22
3
4
5
6
7
8
9
SAA4955TJ
10
11
12
13
14
25
26
1, 2, 39, 40
+5 V
20, 21, 23
17, 18
(1)
10, 12, 13
3 to 7
64, 66
n.c.
+5 V
9
79
76
74
1
2
71
72
70
10 µF
8.2 kΩ
YOUT
UOUT
VOUT
SDA
SCL
n.c.
n.c.
n.c.
HDFL
VDFL
+3.3 V
8, 11, 69,
75, 80
33
SWC
15
RSTW
16
38
37
36
35
34
33
32
31
30
29
28
27
24
WE
RE
HRD
47
24
32
51
52
53
54
55
56
57
58
59
60
61
62
63
20
22
68
14 to 16,
21, 30,
48 to 50,
65, 73,
77, 78
18, 46, 67
SAA4974H
17, 19, 23,
25 to 29,
31, 34 to 45
VA
HA
(1) Alternatively SAA4956TJ.
Fig.13 Application diagram 1.
1998 Apr 2122
DISPLAY
PLL
SRC
MGM694
Page 23
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1998 Apr 2123
LLA
handbook, full pagewidth
YIN7 to
YIN0
UVIN7 to
UVIN4
D11
D10
HRD
33
47
24
32
51
52
53
54
55
56
57
58
59
60
61
62
63
12
13
20
22
68
+3.3 V
8, 11, 69,
75, 80
SAA4974H
14 to 16,
21, 30,
48 to 50,
65, 73,
77, 78
DISPLAY
PLL
RE1
WE2
RE2
SWC
RSTW
WE
41
40
38
37
36
35
34
33
32
31
30
29
28
11
64
66
67
68
69
70
71
72
73
74
75
2, 3, 5, 6, 7,
76
22, 26, 27, 39,
77
47, 60, 63,
+5 V
1, 4, 20, 42,
46, 65, 78
SAA4991WP
62 45
79 to 84
8 to 10
48
49
50
51
52
53
54
55
56
57
58
59
61
44
43
25
24
23
21
19
18
17
16
15
14
13
12
RE
SNDA
SNCL
n.c.
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
+3.3 V
+5 V
19, 22
20, 21, 23
17, 18
+5 V
20, 21, 23
17, 18
15
16
38
37
36
35
34
33
32
31
30
29
28
27
24
15
16
38
37
36
35
34
33
32
31
30
29
28
27
24
3
4
5
6
7
8
9
SAA4955TJ
10
FM1
11
12
13
14
25
26
1, 2, 39, 40
+3.3 V
19, 22
3
4
D9
5
D8
6
D7
7
D6
8
D5
9
D4
D3
D2
D1
D0
SAA4955TJ
10
11
12
13
14
25
26
FM2
1, 2, 39, 40
18, 46, 67
17, 19,
23, 31,
25 to 29,
34 to 45
n.c.
3 to 7
64, 66
SRC
+5 V
79
76
74
10
71
72
70
10 µF
9
8.2 kΩ
YOUT
UOUT
VOUT
1
2
SDA
SCL
n.c.
n.c.
n.c.
HDFL
VDFL
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
VA
HA
MGM695
Fig.14 Application diagram 2.
Page 24
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
12 PACKAGE OUTLINE
QFP80: plastic quad flat package; 80 leads (lead length 1.95 mm); body 14 x 20 x 2.8 mm
c
y
X
Z
E
e
w M
p
A
A
H
E
E
2
A
A
1
6441
65
pin 1 index
80
1
40
b
25
24
detail X
L
p
L
SOT318-2
(A )
3
θ
w M
b
e
p
Z
D
D
H
D
0510 mm
scale
DIMENSIONS (mm are the original dimensions)
mm
A
max.
3.2
0.25
0.05
2.90
2.65
0.25
0.45
0.30
0.25
0.14
UNITA1A2A3bpcE
(1)
(1)(1)(1)
D
20.1
19.9
eH
14.1
13.9
24.2
0.81.95
23.6
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
IEC JEDEC EIAJ
REFERENCES
SOT318-2
1998 Apr 2124
H
D
B
E
18.2
17.6
v M
A
v M
B
LL
p
1.0
0.6
0.20.20.1
EUROPEAN
PROJECTION
Z
D
1.0
0.6
Zywvθ
E
o
1.2
7
o
0.8
0
ISSUE DATE
95-02-04
97-08-01
Page 25
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
13 SOLDERING
13.1Introduction
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
our
“Data Handbook IC26; Integrated Circuit Packages”
(order code 9398 652 90011).
13.2Reflow soldering
Reflow soldering techniques are suitable for all QFP
packages.
The choice of heating method may be influenced by larger
plastic QFP packages (44 leads, or more). If infrared or
vapour phase heating is used and the large packages are
not absolutely dry (less than 0.1% moisture content by
weight), vaporization of the small amount of moisture in
them can cause cracking of the plastic body. For details,
refer to the Drypack information in the
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
.
If wave soldering cannot be avoided, for QFP
packages with a pitch (e) larger than 0.5 mm, the
following conditions must be observed:
• A double-wave (a turbulent wave with high upward
pressure followed by a smooth laminar wave)
soldering technique should be used.
• The footprint must be at an angle of 45° to the board
direction and must incorporate solder thieves
downstream and at the side corners.
During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Maximum permissible solder temperature is 260 °C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150 °C within
6 seconds. Typical dwell time is 4 seconds at 250 °C.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
13.4Repairing soldered joints
Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron
(less than 24 V) applied to the flat part of the lead. Contact
time must be limited to 10 seconds at up to 300 °C. When
using a dedicated tool, all other leads can be soldered in
one operation within 2 to 5 seconds between
270 and 320 °C.
Several methods exist for reflowing; for example,
infrared/convection heating in a conveyor type oven.
Throughput times (preheating, soldering and cooling) vary
between 50 and 300 seconds depending on heating
method. Typical reflow peak temperatures range from
215 to 250 °C.
13.3Wave soldering
Wave soldering is not recommended for QFP packages.
This is because of the likelihood of solder bridging due to
closely-spaced leads and the possibility of incomplete
solder penetration in multi-lead devices.
CAUTION
Wave soldering is NOT applicable for all QFP
packages with a pitch (e) equal or less than 0.5 mm.
1998 Apr 2125
Page 26
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
14 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.
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.
15 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.
16 PURCHASE OF PHILIPS I
Purchase of Philips I
components in the I2C system provided the system conforms to the I2C specification defined by
Philips. This specification can be ordered using the code 9398 393 40011.
2
C COMPONENTS
2
C components conveys a license under the Philips’ I2C patent to use the
1998 Apr 2126
Page 27
Philips SemiconductorsProduct specification
Besic without ADCSAA4974H
NOTES
1998 Apr 2127
Page 28
Philips Semiconductors – a worldwide company
Argentina: see South America
Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113,
United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409,
Tel. +1 800 234 7381
Uruguay: see South America
Vietnam: see Singapore
Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD,
Tel. +381 11 625 344, Fax.+381 11 635 777
For all other countries apply to: Philips Semiconductors,
International Marketing & Sales Communications, Building BE-p, P.O. Box 218,
5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825
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.
Internet: http://www.semiconductors.philips.com
Printed in The Netherlands545104/00/01/pp28 Date of release: 1998 Apr 21Document order number: 9397 750 03018
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