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參數(shù)資料
| 型號： | TDA4657 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 顏色信號轉換 |
| 英文描述： | Generic multi-standard decoder |
| 中文描述： | COLOR SIGNAL DECODER, PDIP20 |
| 封裝： | 0.300 INCH, PLASTIC, SOT-146-1, DIP-20 |
| 文件頁數(shù)： | 10/17頁 |
| 文件大?。?/td> | 121K |
| 代理商： | TDA4657 |
June 1993
10
Philips Semiconductors
Preliminary specification
Generic multi-standard decoder
TDA4657
Notes to the characteristics
1.
Burstkey width 4.3
μ
s.
Burst width 2.25
μ
s, ratio burst chrominance amplitude 1/2.2.
2.
At nominal phase of hue control.
3.
V (p-p) of signal divided by 6 times effective noise voltage.
4.
H/2 blanking alternately every second line.
5.
These pins are leakage current sensitive. Pin 4 for (B
Y) Channel, pin 8 for (R
Y) Channel.
6.
Within 2 dB output voltage deviation.
7.
This pin is leakage current sensitive.
8.
IC only.
9.
Depends also on network on pin 15.
10. Pin 19 for PAL, pin 18 for SECAM, pin 17 for NTSC 4.43 MHz.
Threshold levels are dependent of supply.
11. The field interval of the sandcastle has to be adapted to the ICs TDA2579B and TDA4690.
The thresholds are independent of supply voltage.
12. System scanning sequence: PAL, SECAM, NTSC 4.4.
Sandcastle pulse detector
(pin 20; note 11)
C
20
V
20
input capacitance
thresholds for field and line pulse
separation
line pulse separation
1.3
1.1
3.3
3.1
5.3
5.1
1.6
1.4
3.6
3.4
5.6
5.4
10
1.9
1.7
3.9
3.7
5.9
5.7
pF
V
V
V
V
V
V
pulse ON
pulse OFF
pulse ON
pulse OFF
pulse ON
pulse OFF
burst pulse separation
System control processing
(note 12)
t
d
system hold delay
in event of a signal
disappearing for a
short time
switching occurs
during field blanking
2
3
field
periods
colour killer; colour ON delay
2
3
field
periods
field
periods
field
periods
colour OFF delay
0
1
t
s
scanning time for each system
4
QUALITY SPECIFICATION
: URV-4-2-59/601
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
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