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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(zhuǎn)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)： | 8/17頁 |
| 文件大小： | 121K |
| 代理商： | TDA4657 |
June 1993
8
Philips Semiconductors
Preliminary specification
Generic multi-standard decoder
TDA4657
SECAM
V
1
colour difference output signals
(R
Y) output (peak-to-peak value)
(B
Y) output (peak-to-peak value)
ratio of CD signal amplitudes
V(R
Y)/V(B
Y)
signal linearity at nominal output voltage
cut-off frequency
chrominance delay time
signal to noise ratio for 100 mV (p-p) input
signal and nominal output voltages
residual carrier at CD outputs:
1
×
subcarrier frequency
(peak-to-peak value)
2
×
subcarrier frequency
(peak-to-peak value)
shift of demodulated f
0
level relative to
blanking level
(B
Y) output
(R
Y) output
Impedance and currents see PAL or NTSC specification
independent of supply voltage; note 4
0.95
1.20
0.75
1.05
1.33
0.79
1.15
1.46
0.83
V
V
V
3
V
1
/V
3
m
f
g
t
d
S/N
0.8
400
40
730
500
600
kHz
ns
dB
3 dB
note 3
V
1
, V
3
10
mV
20
mV
V
3
note 8
0
±
13
mV
V
1
0
±
10
mV
Capacitor for SECAM de-emphasis
(pin 2)
C
2
R
A
R
B
(R
A
/R
B
)
value of external capacitor
value of internal de-emphasis resistors
2.4
4.8
220
2.8
5.6
3.2
6.4
±
5
pF
k
k
%
T
amb
= 35
°
C
relative tolerance of de-emphasis resistors
Capacitors for SECAM demodulator control
(pins 4 and 8; note 5)
V
1, 3
shift of demodulated f
0
level due to
external leakage current
C
ext
= 220 nF
0.3
mV/nA
Resistor for SECAM oscillator
(pin 6)
V
6
R
6
C
6
DC voltage
value of external resistor (
±
1%)
value of external capacitor (
±
20%)
2.4
2.81
5.62
10
3.2
V
k
nF
Chrominance input
(pin 9)
V
9
R
9
C
9
input signal (peak-to-peak value)
input resistance
input capacitance
note 6
20
16
200
20
400
24
10
mV
k
pF
Capacitor for ACC
(pin 10; note 7)
V
1, 3
change of CD output signals during field
blanking due to external leakage current
C
ext
= 100 nF
0.2
%/nA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
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