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參數(shù)資料
| 型號(hào)： | U4256BM-R |
| 廠商： | Atmel Corp. |
| 英文描述： | Frequency Synthesizer for Radio Tuning |
| 中文描述： | 無(wú)線電頻率合成調(diào)諧 |
| 文件頁(yè)數(shù)： | 1/19頁(yè) |
| 文件大?。?/td> | 403K |
| 代理商： | U4256BM-R |
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1
Features
Reference Oscillator up to 15 MHz (Tuned)
Oscillator Buffer Output (for AM Up/Down Conversion)
Two Programmable 16-bit Dividers
Fine-tuning Steps Possible
Fast Response Time due to Integrated Loop Push-pull Stage
3-wire Bus (Enable, Clock and Data; 3 V and 5 V Microcontrollers Acceptable)
Four Programmable Switching Outputs (Open Drain)
Three DACs for Software Controlled Tuner Alignment
Low-power Consumption
High S/N Ratio
Integrated Band Gap – only One Supply Voltage Necessary
Description
The U4256BM-R is a synthesizer IC for FM receivers and an AM up-convertion
system in BICMOS technology. Together with the AM/FM IC T4258 or U4255BM, it
performs a complete AM/FM car radio front-end, which is recommended also for RDS
(Radio Data System) applications. It is controlled by a 3-wire bus and also contains
switches and Digital to Analog Converters (DACs) for software-controlled alignment of
the AM/FM tuner. The U4256BM-R is the pin-compatible succesor IC of U4256BM-N.
Pin Configuration
Figure 1.
Pinning SSO20
1
2
3
4
5
6
7
8
1
1
1
1
1
1
1
2
E
D
C
S
S
S
S
G
O
O
M
V
P
P
D
V
9
1
1
F
D
G
1
D
U
Frequency
Synthesizer for
Radio Tuning
U4256BM-R
Preliminary
Rev. 4562C–AUDR–08/04
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| U4256BM | Frequency Synthesizer for Radio Tuning |
| U4256BM-AFS | Frequency Synthesizer for Radio Tuning |
| U4256BM-AFSG3 | Frequency Synthesizer for Radio Tuning |
| U4256BM-RFS | Frequency Synthesizer for Radio Tuning |
| U4256BM-RSG3 | Frequency Synthesizer for Radio Tuning |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| U4256BM-RFS | 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:Frequency Synthesizer for Radio Tuning |
| U4256BM-RSG3 | 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:Frequency Synthesizer for Radio Tuning |
| U426 | 制造商:CALOGIC 制造商全稱(chēng):CALOGIC 功能描述:N-Channel Dual JFET |
| U426_PDIP | 制造商:MICROSS 制造商全稱(chēng):MICROSS 功能描述:a high input impedance Monolithic Dual N-Channel JFET |
| U426_SOIC | 制造商:MICROSS 制造商全稱(chēng):MICROSS 功能描述:a high input impedance Monolithic Dual N-Channel JFET |
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