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参数资料
| 型号： | LA71750EM |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封装： | 14 X 20 MM, QFP-100 |
| 文件页数： | 4/46页 |
| 文件大小： | 898K |
| 代理商： | LA71750EM |
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LA71750EM
No.7952-12/46
Continued from preceding page.
Input signal
Input/Output point
Ratings
Parameter
Symbol
Signal
Level
In
Out
Conditions
min
typ
max
Unit
RF thresyold level
RF1
RF2
T70
L-CH
H-CH
0
2.5
1.9
5.0
V
C-ROT thresyold
level
CROT1
CROT2
CROT3
CROT4
T70
L-CH
H-CH
L-CH
H-CH
0
1.3
2.5
3.9
0.7
1.9
3.3
5.0
V
A-MUTE thresyold
level
AMOF
AMON
T71
MUTE-OFF
MUTE-ON
0
2.5
1.9
5.0
V
HA thresyold level
HA1
HA2
HA3
HA4
T71
SP
EP
SP
EP
0
1.3
2.5
3.9
0.7
1.9
3.3
5.0
V
PAL/SECAM Distinction
Input signal
Input/Output point
Ratings
Parameter
Symbol
Signal
Level
In
Out
Conditions
min
typ
max
Unit
PAL discrimination
minimum input level
VINPAL
SG3
A : 300,
B : 350,
C : 80,
D : 35
T48A T68A Minimum burst level, that is input into
T48A, that makes the level of the
Chroma & Burst of the PAL-GBI signal
decrease which will in turn prevent
errors in the SECAM from occurring.
VINPAL
35
mVp-p
Discrimination small
adjustment center
value
VPSREF
SG3
A : 300,
B : 350,
C : 700,
D : 300
T48A
T35
Volutage of T35 when T35 is opened
VPSREF
2.5
V
SECAM discrimination
minimum input level
VINSEC
SG3
A : 300,
B : 350,
C : 120,
D : 35
T48A T68A Minimum non-modulation carrier level,
that is input into T48A, that makes the
level of chroma & non-modulation of
SECAM signal decrease which will
turn prevent errors in the PAL from
occurring.
VINSEC
35
mVp-p
PAL discrimination
burst position
DLYPAL
SG3
A : 300,
B : 350,
C : 700,
D : 300
T48A T68A The range of butst position that
changes the timing of butst of PAL
signal that is input to T48A and isn't
distinguished from SECAM. The butst
position is defined at the period from
the start of input SYNC to the start of
butst.
DLYPAL
5.1
5.6
6.1
μs
SECAM discrimination
burst position
DLYSEC
SG3
A : 300,
B : 350,
C : 700,
D : 208
T48A T68A The range of non-modulation carrier
opsition that changes the timing of
non-modulation carrier of SECAM
signal that is input to T48A and isn't
distinguished from PAL erroneously.
The opsition of non-modulation carrier
is defined at the period from the start
of input SYNC to the start of
non-modulation carrier.
DLYSEC
5.1
5.6
6.1
μs
Comparator threshold
voltage when
SECAM
→PAL
VCOMLH
DC
T34
T68A To apply DC voltage to T34 and lower
DC from 4V. To measure the DC
voltage that the serial BIT8 data
becomes L
→H.
VCOMLH
2.5
2.8
3.1
V
Comparator threshold
voltage when
PAL
→SECAM
VCOMHL
DC
T34
T68A To apply DC voltage to T34 and rise
DC from 2V. To measure the DC
voltage that the serial BIT8 data
becomes H
→L.
VCOMHL
2.8
3.1
3.4
V
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