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TOSHIBA
TOSHIBA

TB1226EN Datasheet

Video / Chroma and Synchronizing Signals Processing IC


TB1226EN Datasheet Preview


TENTATIVE
TOSHIBA Bi-CMOS INTEGRATED CIRCUIT
SILICON MONOLITHIC
TB1226EN
TB1226EN
VIDEO, CHROMA AND SYNCHRONIZING SIGNALS PROCESSING IC FOR PAL / NTSC
/ SECAM SYSTEM COLOR TV
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
www.DataSheets4hUr.icnokmDIP 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
Weight: 5.55g (Typ.)
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.
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
1 2001-07-26
Page 1

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
www.DataSheet4U.comCut / off-drive adjustment
RGB primary signal output
TB1226EN
2 2001-07-26
Page 2

BLOCK DIAGRAM
TB1226EN
3 2001-07-26
Page 3

TERMINAL FUNCTIONS
PIN
No.
PIN NAME
FUNCTION
1 External Video Input
47 TV Video Input
For inputting external / TV composite
video signal.
Input negative 1Vp-p synchronizing
signal through a coupling capacitor to
these pins.
INTERFACE CIRCUIT
TB1226EN
INPUT / OUTPUT
SIGNAL
Negative 1Vp-p
sync
www.DataSheet4U.co2m V-AGC
3 H-VCC (9V)
Controls pin 52 to maintain a uniform
V-ramp output.
Connect a current smoothing
capacitor to this pin.
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.
4.5V at Open
4 2001-07-26
Page 4
Part Number TB1226EN
Manufactur TOSHIBA
Description Video / Chroma and Synchronizing Signals Processing IC
Total Page 70 Pages
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