TA1275BFNG
TOSHIBA Bipolar Linear Integrated Circuit
Silicon Monolithic
TA1275BFNG
SECAM Demodulator Processor
The TA1275BFNG is a SECAM demodulation IC, used in
combination with the TB1309 series to achieve a multicolor system.
This IC requires very few external parts.
Features
Combines with the TB1309 series, which is a video processor,
timing controller, and PWM pulse processor for analog LCDs
Built-in bell filter
Built-in FM demodulator with PLL circuit for color demodulation
and SECAM identification
DC voltage offset for demodulated signal adjuster
Input terminals for external R-Y / B-Y signals
SSOP24-P-300-0.65A
Weight: 0.09 g (typ.)
Pin Connection
24
BELL CONT
SCP in
23
Y IN
Vcc 5V (Pulse)
22
BELL f0-ADJ.
FILTER
N.C.
21
N.C.
4.43CW-IN
GATE WIDTH
20
C IN
S-LOW PASS SW
H/H+V ID SW
19
f0-ADJ. FILTER
SECAM ID I/O
18
GND
Y OUT
BELL MON
17
N.C.
DL MODE SW
16
EXT. B-Y IN
R-Y OUT
15
Vcc 5V (Y/C)
R-Y BLACK CONT
14
EXT. R-Y IN
B-Y OUT
13
ID FILTER
B-Y BLACK CONT
1
2
3
4
5
6
7
8
9
10
11
12
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TA1275BFNG
P/N 3V
B/W 2V
Block Diagram
1V (p-p)
3.95V
2.7V
1.6V
SCP in
+
f0-ADJ. FILTER
C IN/
S-LOW PASS SW
DL MODE SW
4.43CW-IN
GATE WIDTH
SECAM ID I/O
H/H+V ID SW
BELL f0-ADJ.
FILTER
BELL CONT
ID FILTER
Y IN
8
23
20
13
6
19
24
5
22
4
1
250ns
Y-DL
CLAMP
FLIP/FL
OP
SYS-I/O
LOGIC
GP/H/V
SEPA
5.5M-
TRAP
PULSE
R.
BLACK
CONT
S-
IDENT
f0-ADJ
-DET
BELL
DAC
f0-
SHIFT
-DAC
Gate-
Width/S
W
REF-
BIAS
P/N/S
R-Y SW
R-Y
PERMU
LOW
PASS
4.43M
VCO
BELL-
MON
R-Y
Low-
Pass
R-Y
De-emp
BELL-
ADJ-
DET
4.43M-
CW
P/N/S
B-Y SW
B-Y
PERMU
DEMO
LIMIT
PHASE-
DET
B-Y
Low-
Pass
B-Y
De-emp
BELL-
FILTER
SW
COLOR
AMP
1/2
TRAP
LOW
PASS
SW
B.
BLACK
CONT
IDENT
AMP
ACC
CONT
7
14
B-Y BLACK
CONT
R-Y BLACK
CONT
EXT. R-Y IN
9
11
16
12
10
2
Vcc 5V (Pulse)
15
Vcc 5V (Y/C)
18
GND
3
N.C.
17
N.C.
21
N.C.
B-Y OUT
R-Y OUT
Some functional blocks, circuits or constants may be omitted or simplified in the block diagram for explanatory purposes.
Y OUT
BELL MON
EXT. B-Y IN
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TA1275BFNG
Maximum Ratings
(Ta = 25°C)
Characteristic
Supply voltage
Input pin voltage
Power consumption
Power consumption reduction ratio
Operating temperature
Storage temperature
Symbol
V
CCmax
Vin
P
D
(Note)
1 / Qja
T
opr
T
stg
Rating
8
GND - 0.3 ~ Vcc + 0.3
780
6.3
−30~85
−55~150
Unit
V
V
mW
mW / °C
°C
°C
Note:
When using the device at above TA = 25°C, decrease the power dissipation by 9.1 mW for each increase of
1°C.
The absolute maximum ratings of a semiconductor device are a set of specified parameter values that must not be
exceeded during operation, even for an instant.
If any of these ratings are exceeded during operation, the electrical characteristics of the device may be irreparably
altered, in which case the reliability and lifetime of the device can no longer be guaranteed.
Moreover, operations with exceeded ratings may cause breakdown, damage and/or degradation in other equipment.
Applications using the device should be designed so that no maximum rating will ever be exceeded under any operating
conditions.
Before using, creating and/or producing designs, refer to and comply with the precautions and conditions set forth in
these documents.
Operating Conditions
Characteristic
Supply voltage
Y Input signal level
Color difference input level
Pin 2, 15
White: 100%, including sync.
Burst level
G level
SCP input level
H level
V level
4.43 MHz CW input level
Pin 4
Description
Min
4.75
0.9
270
3.25
1.95
1.1
200
Typ.
5.0
1.0
300
4.0
2.1
1.25
―
Max
5.25
1.1
330
5.0
2.6
1.4
―
mV
(p-p)
V
Unit
―
V
(p-p)
mV
(p-p)
Electrical Characteristics
(YC V
CC
/ Pulse V
CC
= 5 V, Ta = 25°C, unless otherwise specified)
Current Consumption
Pin Name
V
CC
(Y / C)
V
CC
(Pulse)
Symbol
I
CC1
I
CC2
Test
Circuit
―
―
Min
32.0
5.6
Typ.
38.5
6.7
Max
48.1
8.4
Unit
mA
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TA1275BFNG
Terminal Voltage
Pin
No.
4
5
6
7
8
9
10
11
12
13
14
16
19
20
22
23
24
Test
Circuit
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
Pin Name
4.43 MHz CW-IN
ID SW
SECAM ID I / O (killer OFF)
Y OUT
MODE SW
R-Y OUT
R-Y BLACK CONTROL
B-Y OUT
B-Y BLACK CONTROL
S-ID FILTER (killer OFF)
EXT. R-Y IN
EXT. B-Y IN
F0-ADJ. FILTER
C IN
BELL ADJ. FILTER
Y IN
BELL CONTROL
Symbol
V
4
V
5
V
6
V
7
V
8
V
9
V
10
V
11
V
12
V
13
V
14
V
16
V
19
V
20
V
22
V
23
V
24
Min
2.50
2.30
0.00
2.35
1.80
2.10
2.30
2.10
2.30
4.25
2.40
2.40
2.55
3.50
2.20
2.30
4.80
Typ.
2.75
2.50
0.20
2.55
2.00
2.40
2.50
2.40
2.50
4.55
2.60
2.60
3.00
3.70
2.50
2.50
5.00
Max
3.00
2.70
0.60
2.75
2.20
2.70
2.70
2.70
2.70
4.85
2.80
2.80
3.45
3.90
2.80
2.70
5.20
Unit
V
Note:
The pins numbered 1, 4, 9, 10, 12, 13, 14, 19, 20 and 24 of this product are sensitive to electrostatic
discharge. When handling the product, protect the environment to avoid electrostatic discharge.
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TA1275BFNG
Terminal Interface
Interface Circuit
2
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purposes.
Input/Output Signal
Pin
No.
Pin Name
Function
The pin for inputting the sand
castle pulse (SCP)
1
1
―
SCP IN
18
2
―
15
Vcc 5 V (Pulse)
V
CC
pin for logic block
―
―
―
3
N.C. (No Connection)
Connect to GND.
4.43CW-IN
4
4
GATE WIDTH
The pin for inputting 4.43 MHz of
carrier wave for the
selfadjustment circuit. Input a
500 mV
p-p
sine wave through a
coupling capacitor.
The switch for changing the gate
pulse width is overlaid on this
pin.
―
+200 nS
:
0ns
−200
nS
:
:
to V
CC
thru
33 kΩ
open
to GND thru
33 kΩ
18
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2005-03-14
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