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參數資料
| 型號： | LA7642N |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP16 |
| 封裝： | 0.300 INCH, DIP-16 |
| 文件頁數： | 4/6頁 |
| 文件大小： | 63K |
| 代理商： | LA7642N |
No. 5693-4/6
LA7642N
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Input a signal to which a 63-kHz modulation
has been applied to pin 14 and measure the
pin 6 R-Y amplitude Vron (V p-p) when pre-
De-emphasis 63k R-Y
DE63R
emphasis is on. Next, turn off preemphasis,
–1.0
–2.6
–4.0
dB
measure the pin 6 R-Y amplitude Vroff
(V p-p), and calculate DE63R from the
following formula.
DE63R = 20
× log (Vroff/Vron) (dB)
Input a signal to which a 250-kHz modulation
has been applied to pin 14 and measure the
pin 7 B-Y amplitude Vbon (V p-p) when pre-
De-emphasis 250k B-Y
DE250B
emphasis is on. Next, turn off preemphasis,
–4.5
–7.0
–9.5
dB
measure the pin 7 B-Y amplitude Vboff
(V p-p), and calculate DE250B from the
following formula.
DE250B = 20
× log (Vboff/Vbon) (dB)
Input a signal to which a 250-kHz modulation
has been applied to pin 14 and measure the
pin 6 R-Y amplitude Vron (V p-p) when pre-
De-emphasis 250k R-Y
DE250R
emphasis is on. Next, turn off preemphasis,
–6.5
–9.0
–11.5
dB
measure the pin 6 R-Y amplitude Vroff
(V p-p), and calculate DE250R from the
following formula.
DE250R = 20
× log (Vroff/Vron) (dB)
[Sandcastle Pulse]
Apply at least 16 pulses with an amplitude of
0 V to VCC and then take the following
V threshold voltage
VBLK
measurement. Apply a DC voltage to pin 10
1.0
1.3
1.6
V
and slowly increase this voltage starting at
0 V. Measure the DC voltage applied to pin
at the point the pin 3 DC voltage exceeds 3 V.
Apply at least 16 pulses with an amplitude of
0 V to VCC and then take the following
measurement. Apply a pulse signal with a
12-s high period and a 52-s low period
H threshold voltage
HBLK
(for a 64-s cycle) and slowly increase the
2.5
3.0
3.5
V
amplitude of that signal starting at 0. Measure
the wave height of that pulse signal at the
point the pin 7 (B-Y) DC voltage exceeds
VBYBLK + 100 mV.
Apply at least 16 pulses with an amplitude of
0 V to VCC and then take the following
measurement. Apply a pulse signal with a
12-s high period and a 52-s low period
BGP threshold voltage
BGP
(for a 64-s cycle) and slowly increase the
4.5
5.0
5.5
V
amplitude of that signal starting at 0. Measure
the wave height of that pulse signal at the
point the pin 4 (IDF) DC voltage becomes
higher than it was at the point the pulse signal
wave height was 0.
[System Switching]
Slowly increase the pin 12 DC voltage from
SECAM threshold voltage 1
SESWLO 0 V and measure that voltage at the point
1.0
1.3
1.6
V
the mode switches to a non-SECAM mode.
Slowly increase the pin 12 DC voltage from
SECAM threshold voltage 2
SESWHI
3 V and measure that voltage at the point
3.6
3.9
4.3
V
the mode switches to SECAM mode.
[Killer Output: Pin 13]
Killer on output level
VKILON
Measure the pin 13 voltage when the killer
0.0
0.2
0.5
V
circuit is on.
Killer off output level
VKILOF
Measure the pin 13 voltage when the killer
7.3
7.8
V
circuit is off.
[Reference Frequency Input Block]
Measure the variation in the pin 5 DC voltage
4.00-MHz input level variations 1
V5DS4
when the 4.00-MHz input level is changed
–50
0
+50
mV
from 200 mV p-p to 100 mV p-p.
Continued from preceding page.
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