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參數(shù)資料
| 型號： | LA1867NM |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Car Radio Single-Chip Tuner System |
| 中文描述： | 汽車無線電單芯片調諧器系統(tǒng) |
| 文件頁數(shù)： | 10/32頁 |
| 文件大?。?/td> | 941K |
| 代理商： | LA1867NM |
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No. 4619-10/32
LA1867NM
Pin
Function
Equivalent internal circuit
Note
24
AFC
25
QD OUT
26
QD IN
27
V
REF
29
SD pin
30
SD sensitivity adjustment
pin
19
IF counter buffer
Seek/stop switch
R
1
is the resistor that determines the band
muting bandwidth.
Increasing R
1
reduces the bandwidth.
Decreasing R
1
increases the bandwidth.
Null voltage
When tuned, the voltage between pins 24
and 27 will be 0 V.
V
24
– V
27
= 0 V
The band muting is turned on when
| V
24
– V
27
|
≥
0.7 V.
The SD output for the pin 30 SD.
R determines the SD sensitivity.
Pin 23 is coupled to the muting drive output.
SD operates when the switch is off.
This pin is used for both the IF counter
buffer (AC output) and the seek/stop switch
(DC input).
It is not coupled to the SD output.
The IF buffer is turned on and off by the pin
19 DC bias level.
Pin 19: high
→
buffer on, low
→
buffer off.
Unit (resistance:
, capacitance:F)
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