TB1274BFG Datasheet, PDF (1/37 Pages) Toshiba Semiconductor – LUMINANCE, CHROMA AND SYNCHRONIZING SIGNALS PROCESSOR IC FOR PAL / NTSC / SECAM COLOR TV

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