TDA8844 Datasheet – DIP 56Pin, TV Processor
I2C-bus controlled PAL/NTSC/SECAM TV processors
TDA8844 overview
The TDA8844 is an I2C-bus controlled PAL/NTSC/SECAM TV processors made by Philips Electronics - NXP, supplied in a DIP 56Pin package. The absolute maximum ratings table on this page lists the 7 limits from the manufacturer's datasheet that must not be exceeded. This page brings together the TDA8844 pinout and maximum ratings, with the full datasheet PDF to preview below or download.
The various versions of the TDA 884X/5X series are I2C-bus controlled single chip TV processors which are intended to be applied in PAL, NTSC, PAL/NTSC and multi-standard television receivers. The N2 version is pin and application compatible with the N1 version, however, a new feature has been added which makes the N2 more attractive. The IF PLL demodulator has been replaced by an alignment-free IF PLL demodulator with internal VCO (no tuned circuit required). The setting of the various frequencies (33.4, 33.9, 38, 38.9, 45,75 and 58.75 MHz) can be made via the I2C-bus. Because of this difference the N2 version is compatible with the N1, however, N1 devices cannot be used in an optimizer N2 application.
Datasheet
TDA8844 features
- Multi-standard vision IF circuit with an alignment-free PLL demodulator without external components
- Alignment-free multi-standard FM sound demodulator (4.5 MHz to 6.5 MHz)
- Audio switch
- Flexible source selection with CVBS switch and Y(CVBS)/C input so that a comb filter can be applied
- Integrated chrominance trap circuit
- Integrated luminance delay line
- Asymmetrical peaking in the luminance channel with a (defeatable) noise coring function
- Black stretching of non-standard CVBS or luminance signals
- Integrated chroma band-pass filter with switchable centre frequency
- Dynamic skin tone control circuit
- Blue stretch circuit which offsets colours near white towards blue
- RGB control circuit with “Continuous Cathode Calibration” and white point adjustment
- Possibility to insert a “blue back” option when no video signal is available
- Horizontal synchronization with two control loops and alignment-free horizontal oscillator
- Vertical count-down circuit
- Vertical driver optimised for DC-coupled vertical output stages
- I2C-bus control of various functions
TDA8844 pinout
| Name | Description |
|---|---|
| SNDIF | Sound IF input |
| AUDIOEXT | External audio input |
| NC | not connected |
| NC | not connected |
| PLLLF | IF-PLL loop filter |
| IFVO | IF video output |
| SCL | serial clock input |
| SDA | serial data input/output |
| DECBG | bandgap decoupling |
| CHROMA | chrominance input (S-VHS) |
| CVBS/Y | external CVBS/Y input |
| VP1 | main supply voltage 1 (+8 V) |
| CVBSINT | internal CVBS input |
| GND1 | ground 1 |
| AUDIOOUT | audio output |
| SECPLL | SECAM PLL decoupling |
| CVBSEXT | external CVBS input |
| BLKIN | black-current input |
| BO | blue output |
| GO | green output |
| RO | red output |
| BCLIN | beam current limiter input/V-guard input |
| RI | red input for insertion |
| GI | green input for insertion |
Show all 38 pins
| Name | Description |
|---|---|
| BI | blue input for insertion |
| RGBIN | RGB insertion input |
| LUMIN | luminance input |
| LUMOUT | luminance output |
| BYO | (B-Y) signal output |
| RYO | (R-Y) signal output |
| BYI | (B-Y) signal input |
| RYI | (R-Y) signal input |
| REFO | subcarrier reference output |
| XTAL1 | 3.58 MHz crystal connection |
| XTAL2 | 4.43/3.58 MHz crystal connection |
| DET | loop filter phase detector |
| VP2 | 2nd supply voltage 1(+8 V) |
| CVBS1O | CVBS-1 output |
Absolute maximum ratings
| Parameter | Symbol | Value | Unit | Conditions |
|---|---|---|---|---|
| supply voltage | VP | Max. 9.0 | V | |
| storage temperature | Tstg | Min. -25 / Max. +150 | °C | |
| operating ambient temperature | Tamb | Min. 0 / Max. 70 | °C | |
| soldering temperature | Tsol | Max. 260 | °C | for 5 s |
| operating junction temperature | Tj | Max. 150 | °C | |
| electrostatic handling | Ves | Min. -2000 / Max. +2000 | V | HBM; all pins; notes 1 and 2 |
| -200 | MM; all pins; notes 1 and 3 | Min. V | +200 |
TDA8844 applications
- Television Sets
- Set-Top Boxes
- Video Game Consoles
- Video Signal Processing
- Digital TV Receivers
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