![](http://datasheet.mmic.net.cn/370000/TDA4655_datasheet_16738585/TDA4655_7.png)
June 1993
7
Philips Semiconductors
Preliminary specification
Generic multi-standard decoder
TDA4655
CHARACTERISTICS
Measured with application circuit (Fig.4) at T
amb
=
+
25
°
C, 8 V supply, 75% colour bar chrominance input signal of
200 mV (peak-to-peak value) and nominal phase for NTSC unless otherwise specified. All voltages measured
referenced to ground.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
P
I
supply voltage
supply current
7.2
25
8.0
31
8.8
37
V
mA
V
P
= 8.0 V
without load
V
P
= 8.0 V
without load
P
tot
total power dissipation
248
296
mW
CD signal outputs
(pins 1 and 3)
PAL or NTSC
V
1
colour difference output signals
(R-Y) output PAL and NTSC 4.43 MHz
(peak-to-peak value)
NTSC 3.58 MHz (peak-to-peak value)
(B-Y) output PAL and NTSC 4.43 MHz
(peak-to-peak value)
NTSC 3.58 MHz (peak-to-peak value)
signal ratio PAL/NTSC 3.58 MHz
ratio of CD signal amplitudes
V(R-Y) / V(B-Y)
signal linearity
(R-Y) output
signal linearity
(B-Y) output
cut-off frequency (both outputs)
chrominance delay time
signal to noise ratio for nominal output
voltages
residual carrier at CD outputs:
1
×
subcarrier frequency
(peak-to-peak value)
2
×
subcarrier frequency
(peak-to-peak value)
H/2 content at R-Y output at nominal input
signal (peak-to-peak value)
crosstalk between CD Channels
output resistance (npn emitter follower)
output current
independent of supply voltage; note 1
442
525
624
mV
370
559
440
665
523
791
mV
mV
V
3
468
0.5
0.75
557
1.5
0.79
662
2.5
0.83
mV
dB
V
PAL
/V
NTSC
V
1
/V
3
note 2
note 2
m
V
1
= 0.8 V (p-p)
V
3
= 1.0 V (p-p)
3 dB
0.8
0.8
220
40
1
270
320
MHz
ns
dB
f
g
t
d
S/N
note 3
V
1,
V
3
10
mV
note 4
30
mV
10
mV
A
R
1,
R
3
I
1,
I
3
SECAM
V
1
40
200
3
dB
mA
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)/(B-Y)
signal linearity at nominal output voltage
independent of supply voltage; note 5
0.95
1.20
0.75
0.8
1.05
1.33
0.79
1.15
1.46
0.83
V
V
V
3
V
1
/V
3
m