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PDF TB1239BF Data sheet ( Hoja de datos )
| Número de pieza | TB1239BF | |
| Descripción | Bi-CMOS Integrated Circuit Silicon Monolithic | |
| Fabricantes | Toshiba Semiconductor | |
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Preliminary
Bi-CMOS Integrated Circuit Silicon Monolithic
TB1239BF
TB1239BF
Luminance, Chroma and Synchronizing Signals Processor IC for PAL/NTSC/SECAM
COLOR TV
TB1239BF integrates luminance, chroma and synchronizing
signals processing circuits for PAL/NTSC/SECAM color TV
system.
TB1239BF 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 4.43 MHz, 3.58 MHz and
M/N-PAL clock signals internally for color demodulation. A
horizontal PLL circuit is also built in this IC.
PAL/SECAM demodulation circuits which are adjustment-free
Weight: 0.83 g (typ.)
circuits incorporates a 1 H DL circuit inside for operating the
base band signal processing system.
Also, TB1239BF 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
· Black stretch circuit
· DC restoration circuit
· Y delay line
· Sharpness control
· Sub-Contrast control (−/+2dB)
· Black set-up for PAL plus
Chroma Section
· Built-in 1 H delay circuit (PAL/SECAM base band demodulation system)
· One crystal color demodulation circuit (4.43 MHz, 3.58 MHz, M/N-PAL)
· Automatic system discrimination system and forced system mode
· 1 H 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
1 2002-02-12
1 page  
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Pin
No.
Pin Name
Function
Interface Circuit
32
TB1239BF
Input/Output Signals
5 COMB Y-IN
Input luminance signal
from Comb filter through
a clamping capacitor.
5
250 W
1 Vp-p (with sync)
DC: 1.8 V
6 D-VDD
COMB C-IN
7
/FORCED-S
8 D-GND
9 HS
28
Power supply pin for
DDS/BUS/V-CD/H-CD
sections.
¾ DC 5 V
Input chroma signal
from Comb filter through
a clamping capacitor.
When this pin is
connected to VCC, color
killer is OFF and
SECAM ID is ON
forcibly.
(forced SECAM mode)
Refer to FUNCTION
DESCRIPTION.
7
32
250 W
C Forced-S
50 kW 20 kW
0.3 Vp-p (burst)
DC: 2.4 V
4.0 V <= Forced-S <= 5.0 V
(Th: 3.5 V)
28
GND pin for
DDS/BUS/V-CD/H-CD
sections.
¾
Output pin of horizontal
synchronizing signal.
Minimun pull-down
resister is 2.7 kW.
9
50 W
12
16
Hi
Low
3.8 V <= Hi <= 4.6 V
0 <= Low <= 1.0 V
10 SCP
Sand Castle Pulse
output pin.
The clamping pulse and
the horizontal blanking
pulse are outputted.
10
50 W
12
16
CP
H-BLK
Low
3.6 V <= CP <= 4.4 V
1.6 V <= H-BLK <= 2.4 V
0.0 V <= Low <= 0.8 V
with pull-down
resister (7.5 kW)
5 2002-02-12
5 Page 
www.DataSheet4U.com
Pin
No.
Pin Name
Function
42 ADDRESS
Slave address setting
pin. Select slave
address. When this pin
is open, 8A/8BH is
selected.
W 88H 8AH 8EH
R 89H 8BH 8FH
Interface Circuit
6
42
3 kW
8
TB1239BF
Input/Output Signals
88/89H <= 1.3 V
3.9 V <= 8E/8FH
(Th1: 1.5 V, Th2: 3.2 V)
43 C2-IN
Input C2 signal through
a clamping capacitor.
250 W
43
32
0.3 Vp-p (burst)
DC: 1.6 V
28
44 CVBS2/Y2-IN
Input CVBS2/Y2 signal
through a clamping
capacitor.
44
250 W
45 COMB SYS
The status of color
system is responded to
pin 45 and pin 46. It is
the same as Read BUS
status.
Color
System
M-PAL
Pin Pin
45 46
Low Low
4.43PAL,
SECAM, High Low
B/W
3.58/4.43
NTSC
Low
High
N-PAL High High
Refer to FUNCTION
DESCRIPTION.
45
32
CVBS: 1 Vp-p
Y: 1 Vp-p (with sync)
DC: 1.8 V
28
32
High
5V
0V
Low
28
11 2002-02-12
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