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參數資料
| 型號： | LA1845NM |
| 廠商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO24 |
| 封裝： | MFP-24 |
| 文件頁數： | 5/10頁 |
| 文件大小： | 190K |
| 代理商： | LA1845NM |
Pin No.
Pin function
Pin voltage
Notes
Equivalent circuit
VCC
Vreg
Pin Functions
No. 5888-4/10
LA1845N, 1845NM
FM IF input
AM mixer output
1
2
Input impedance ri = 330
Connect the mixer coil between this pin and VCC
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 ri = 2 k
6
7
A10638
VCC
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.
VCC
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
VCC – 1.0
Phase comparator
low-pass filter
(AM/FM switching)
11
The device operates in AM mode when a current
of over 200 A flows from pin.12.
Limit values for the resistor:
2.7 k
(When VCC = 7 V)
3.9 k
(8 V)
11
A10641
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