TB1226EN Datasheet – Signal processing IC – Toshiba
TB1226EN overview
The TB1226EN is a Signal processing IC made by Toshiba, supplied in a DIP 56 Pin package. The absolute maximum ratings table on this page lists the 6 limits from the manufacturer's datasheet that must not be exceeded. This page brings together the TB1226EN pinout and maximum ratings, with the full datasheet PDF to preview below or download.
TB1226EN that is a signal processing IC for the PAL / NTSC / SECAM color TV system integrates video, chroma and synchronizing signal processing circuits together in a 56-pin DIP plastic package.
TB1226EN incorporates a high performance picture quality compensation circuit in the video section, an automatic PAL / NTSC / SECAM discrimination circuit in the chroma section, and an automatic 50 / 60Hz discrimination circuit in the synchronizing section. Besides a crystal oscillator that internally generates 4.43MHz, 3.58MHz and M / N-PAL clock signals for color demodulation, there is a horizontal PLL circuit built in the IC.
The PAL / SECAM demodulation circuit which is an adjustment-free circuit incorporates a 1H DL circuit inside for operating the base band signal processing system.
Also, TB1226EN makes it possible to set or control various functions through the built-in I2C bus line.
Datasheet
TB1226EN features
- Video section
- Built-in trap filter
- Black expansion circuit
- Variable DC regeneration rate
- Y delay line
- Sharpness control by aperture control
- γ correction
- Chroma section
- Built-in 1H Delay circuit
- PAL / SECAM base band demodulation system
- One crystal color demodulation circuit (4.43MHz, 3.58MHz, M / N-PAL)
- Automatic system discrimination, system forced mode
- 1H delay line also serves as comb filter in NTSC demodulation
- Built-in band-pass filter, SECAM bell filter
- Color limiter circuit
- Synchronizing deflecting section
- Built-in horizontal VCO resonator
- Adjustment-free horizontal / vertical oscillation by count-down circuit
- Double AFC circuit
- Vertical frequency automatic discrimination circuit
- Horizontal / vertical holding adjustment
- Vertical ramp output
- Vertical amplitude adjustment
- Vertical linearity / S-shaped curve adjustment
- Text section
- Linear RGB input
- OSD RGB input
- Cut/off-drive adjustment
- RGB primary signal output
TB1226EN pinout
| Pin | Name | Description |
|---|---|---|
| 1, 47 | External Video Input TV Video Input | For inputting external / TV composite video signal. Input negative 1Vp-p synchronizing signal through a coupling capacitor to these pins. |
| U.co2m | V-AGC | Controls pin 52 to maintain a uniform V-ramp output. Connect a current smoothing capacitor to this pin. |
| 3 | H-VCC (9V) | VCC for the DEF block (deflecting system). Connect 9V (Typ.) to this pin. |
| 4 | Horizontal Output | Horizontal output terminal. |
| 5 | Picture Distortion Correction | Corrects picture distortion in high voltage variation. Input AC component of high voltage variation. For inactivating the picture distortion correction function, connect 0.01µF capacitor between this pin and GND. |
| 6 | FBP Input | FBP input for generating horizontal AFC2 detection pulse and horizontal blanking pulse The threshold of horizontal AFC2 detection is set H.VCC − 2Vf (Vf » 0.75V). Confirming the power supply voltage, determine the hige level of FBP. |
Absolute maximum ratings
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Supply Voltage | VCCMAX | 12 | V |
| Permissible Loss | PDMAX | 2190 (Note) | mW |
| Power Consumption Declining Degree | 1 / Qja | 17.52 | mW / °C |
| Input Signal Voltage | ein | 7 | Vp-p |
| Operating Temperature | Topr | −20~65 | °C |
| Conserving Temperature | Tstg | −55~150 | °C |
TB1226EN applications
- Motor Driver for Tape Decks
- Audio Equipment Control
- Consumer Electronics
- Industrial Automation
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