TB1274BFG Datasheet PDF - Toshiba
| Part Number | TB1274BFG | |
| Description | Synchronizing Signals Processor IC | |
| Manufacturers | Toshiba | |
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TB1274BFG
TOSHIBA Bi-CMOS INTEGRATED CIRCUIT SILICON MONOLITHIC
TB1274BFG
LUMINANCE,
CHROMA
AND
SYNCHRONIZING SIGNALS PROCESSOR IC
FOR PAL / NTSC / SECAM COLOR TV
TB1274BFG integrates luminance, chroma and synchronizing
signals processing circuits for PAL / NTSC / SECAM color TV
system.
TB1274BFG incorporates high performance picture quality
compensation circuits in luminance section, an automatic PAL
/ NTSC / SECAM discrimination and decode circuits in chroma
section, and an automatic 50 / 60 Hz discrimination circuit in
synchronizing section.
Besides a crystal oscillator generates 4.43MHz, 3.58MHz and
M/N-PAL clock signals internally for color demodulation. A
QFP48-P-1014-0.80
horizontal PLL circuit is also built in this IC.
PAL / SECAM demodulation circuits which are
Weight : 0.83 g (Typ.)
adjustment-free circuits incorporates a 1H DL circuit inside for
operating the base band signal processing system.
Also, TB1274BFG makes it possible to set and to control various functions through the built-in I2C BUS
line.
FEATURES
LUMINANCE SECTION
• Built-in chroma trap filter
• Y delay line
• Sharpness control
• Sub-Contrast control (-/+ 2dB)
• Black set-up
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 and
forced system mode
• 1H delay line also serves as comb filter in NTSC
demodulation
• Built-in band-pass and take-off filter, SECAM bell
filter
• Sub-Color control (-/+2dB)
SYNCHRONIZING SECTION
• Built-in horizontal VCO resonator
• Adjustment-free horizontal and vertical oscillation
by count-down circuit
• Automatic vertical frequency discrimination
circuit
• Noise detection circuit
OTHERS
• Y/C out level control
• 4-channels inputs switching
• 2-input circuit for RGB
• 2-input circuit for Y/Cb/Cr
• Y/Cb/Cr outputs
• Cb/Cr offset adjustment
• Built-in pre filters for A/D converter
1 2005-08-18
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TB1274BFG
PIN
No.
PIN NAME
FUNCTION
INTERFACE CIRCUIT
INPUT / OUTPUT
SIGNALS
32
17 Cr1-IN
18 Cb1-IN
17,18
240Ω
240Ω
240Ω
Input Y1/Cb1/Cr1 signal through
a clamping capacitor.
(Selected by I2C BUS.)
When Y/Cb/Cr1-IN is active, Y1
signal is synchronized.
1kΩ
1kΩ
28
32 Y : 1Vp-p(with sync)
DC : 1.7V
Cb/Cr : 0.7Vp-p(100％
color bar)
DC : 2.5V
19 Y1-IN
19
5kΩ
28
32
20 CLP-FIL
Connect a filter for clamping Y
signal.
20 10kΩ
50Ω
21 Y-OUT
22 Cb-OUT
23 Cr-OUT
Y/Cb/Cr output pins.
The output’s amplitudes is
variable from 0.5 to 1.6Vp-p by
I2C BUS.
24
YS1
(YCbCr2-in)
Pin to switch main signals and
YCbCr2 signals.
21,22,23
50Ω
28
32
28
32
DC ;
Y : 1.3V, Cb/Cr : 1.8V
AC ;
Y:
0.7Vp-p(0dB,non-sync)
Cb/Cr : 0.7Vp-p(0dB)
24 6.1kΩ
28
1.0V≦YCbCr2≦5.0V
(Th : 0.7V)
5 2005-08-18
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for TB1274BFG electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ TB1274BFG.PDF Datasheet ] | |
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| Part Number | Description | MFRS |
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