TC90A80N Datasheet, PDF (1/23 Pages) Toshiba Semiconductor – 3-Line Digital Comb Filter for VCR, YNR/CNR, and Skew Correctors (NTSC)

TC90A80N/F
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC90A80N,TC90A80F
3-Line Digital Comb Filter for VCR, YNR/CNR, and Skew Correctors (NTSC)
The TC90A80N/F is a 3-line digital Y/C (luminance/
chrominance) separation IC for VCR.
In addition to YNR and CNR used for noise reduction in the
playback signal, the IC incorporates skew correctors for special
playback. The IC is then suitable for processing S-VHS recorded
playback signals.
TC90A80N
Features
• TV format: NTSC (3.58)
• Dynamic comb filter
• YNR circuit
TC90A80F
• CNR circuit
• Luminance signal non-linear vertical edge corrector (with
coring function)
• Luminance signal horizontal frequency characteristic
corrector (with coring function)
• Luminance signal line noise canceller
• Record/playback input switch circuit (switches between Y/C
and Y inputs)
• Y and C input pins, independently one another (Y: sync tip
clamp; C: center bias)
• Re-mixer circuit after Y/C sharpness processing
• Skew detector and correctors (NTSC ×5 Mode: in units of 0.2
H)
Weight
SDIP28-P-400-1.78 : 1.7 g (typ.)
SOP28-P-450-1.27 : 0.8 g (typ.)
• PLL detector for switching frequencies (fsc, 2 fsc, 4 fsc and 8 fsc clock inputs)
• 8-bit 4 fsc AD converter (2 channels)
• 10-bit 8 fsc DA converter (2 channels)
• 1-H delay line (2 channels)
• I²C bus control
• I²C bus decode output pin (High/Low)
• 5-V single power operation
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2002-12-04