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參數(shù)資料
| 型號(hào)： | LA1845NM |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Single-Chip Home Stereo IC |
| 中文描述： | 單芯片家用音響集成電路 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大?。?/td> | 190K |
| 代理商： | LA1845NM |
Pin No.
Pin function
Pin voltage
Notes
Equivalent circuit
V
CC
V
CC
Vreg
Pin Functions
No. 5888-4/10
LA1845N, 1845NM
FM IF input
AM mixer output
1
2
Input impedance r
i
= 330
Connect the mixer coil between this pin and V
CC
1
3
A10635
2
A10636
3
A10635
2.3
REG
3
Vreg = 2.3 V
4
A10637
Vreg
0 V
AM IF input
GND
4
5
Input impedance r
i
= 2 k
6
7
A10638
V
CC
V
CC
TU-LED
ST-LED / AF-IF
output
6
7
Active low
Open collector
FM detector
8
The 600BEAS-10471 (Toko Mfg. Co., Ltd.) is
recommended for detector coil.
V
CC
9
Continued on next page.
0 V
AM / FM IF
counter output,
output control
switch, mute
switch
10
V10
≤
0.5 V: Reception state
1.4 V
≤
V10
≤
2.2 V: Muting on
V10
≥
3.5 V: IF counter output and muting on
10
A10643
V
CC
– 1.0
Phase comparator
low-pass filter
(AM/FM switching)
11
The device operates in AM mode when a current
of over 200 μA flows from pin.12.
Limit values for the resistor:
2.7 k
(When V
CC
= 7 V)
3.9 k
(8 V)
11
A10641
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