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參數資料
| 型號： | U4255BM-M |
| 英文描述： | Low power single voltage comparator |
| 中文描述： | 調幅/調頻接收器IC車 |
| 文件頁數： | 9/14頁 |
| 文件大小： | 139K |
| 代理商： | U4255BM-M |
U4255BM
Rev. A2, 11-Oct-00
9 (14)
Setting of the center frequency of the integrated FM band
filter and demodulator.
IF Center
Bit 59
Bit 58
Bit 57
Bit 56
450.00 kHz
0
0
0
0
456.25 kHz
0
0
0
1
461.50 kHz
0
0
1
0
468.75 kHz
0
0
1
1
475.00 kHz
0
1
0
0
481.25 kHz
0
1
0
1
487.50 kHz
0
1
1
0
493.75 kHz
0
1
1
1
450.00 kHz
1
0
0
0
443.75 kHz
1
0
0
1
437.50 kHz
1
0
1
0
431.25 kHz
1
0
1
1
425.00 kHz
1
1
0
0
418.75 kHz
1
1
0
1
412.50 kHz
1
1
1
0
406.25 kHz
1
1
1
1
Function of Pin 20 setting is done by Bit 55.
Pin 21: IF out/ Field Strength for
Multipath
Bit 55
2nd IF output
0
Multipath field strength
1
Setting Bit 54 = 1 enables the use of an additional external
band filter (Pin 23/24 to Pin 28), in FM mode.
2nd IF Filter
Bit 54
Internal filter
0
External and internal filter
1
Setting Bit 53 activates the automatic demodulator fine
tuning which is used in weatherband mode. In FM the
default setting is B53 = 1.
Demodulator Fine Adjust
Fine tuning ON
Fine tuning OFF
Bit 53
0
1
The bit 52 is not used.
Setting of the center frequency-offset of the integrated
FM band filter.
If Bit 4 = 0 the default setting (0 kHz) is used.
IF Correction
– 0 kHz
– 6.25 kHz
– 12.50 kHz
– 8.75 kHz
– 25.00 kHz
– 31.25 kHz
– 37.50 kHz
– 43.75 kHz
+ 0 kHz (default)
+ 6.25 kHz
+ 12.50 kHz
+ 8.75 kHz
+ 25.00 kHz
+ 31.25 kHz
+ 37.50 kHz
+ 43.75 kHz
Bit 17 Bit 16 Bit 15
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
Bit 14
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Setting of the bandwidth of the adjacent channel detector
filter.
If Bit 4 = 0 the default setting (76 kHz) is used.
IF
C
orrection
3 kHz
46 kHz
17.5 kHz
60 kHz
31 kHz
76 kHz (default)
54 kHz
90 kHz
61 kHz
106 kHz
76 kHz
120 kHz
90 kHz
136 kHz
105 kHz
151 kHz
Bit 13 Bit 12 Bit 11
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
Bit 10
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
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相關代理商/技術參數 |
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|---|---|
| U4255BM-MFN | 功能描述:IC RCVR AM/FM FRONT-END 44-SSOP RoHS:否 類別:RF/IF 和 RFID >> RF 接收器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS 產品變化通告:Product Discontinuation 09/Jan/2012 標準包裝:50 系列:* 頻率:850MHz ~ 2.175GHz 靈敏度:- 數據傳輸率 - 最大:- 調制或協議:- 應用:* 電流 - 接收:* 數據接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 特點:- 電源電壓:4.75 V ~ 5.25 V 工作溫度:0°C ~ 85°C 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| U4255BM-MFNG3 | 功能描述:IC RCVR AM/FM FRONT-END 44-SSOP RoHS:是 類別:RF/IF 和 RFID >> RF 接收器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS 產品變化通告:Product Discontinuation 09/Jan/2012 標準包裝:50 系列:* 頻率:850MHz ~ 2.175GHz 靈敏度:- 數據傳輸率 - 最大:- 調制或協議:- 應用:* 電流 - 接收:* 數據接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 特點:- 電源電壓:4.75 V ~ 5.25 V 工作溫度:0°C ~ 85°C 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| U4256BM | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Frequency Synthesizer for Radio Tuning |
| U4256BM-AFS | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Frequency Synthesizer for Radio Tuning |
| U4256BM-AFSG3 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Frequency Synthesizer for Radio Tuning |
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