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參數(shù)資料
| 型號： | SDA9251-2X |
| 廠商： | SIEMENS A G |
| 元件分類： | DRAM |
| 英文描述： | 868352-Bit Dynamic Sequential Access Memory for Television Applications (TV-SAM) |
| 中文描述： | 212K X 4 VIDEO DRAM, 25 ns, PDSO28 |
| 文件頁數(shù)： | 23/23頁 |
| 文件大?。?/td> | 771K |
| 代理商： | SDA9251-2X |
SDA 9251-2X
Semiconductor Group
181
Typical Application
Digital Storage of a TV Field
As standard for digital TV systems, CCIR recommendation 601 defines a field of 288 lines with 720
pixels per line.
The sampling frequency is 13.5 MHz with a resolution of 8 bit per pixel.
Information is stored in 3 different channels: one channel for luminance (Y), two channels for
chrominance (U and V).
The bandwidth ratio between the different channels is either Y:U:V = 4:1:1, 4:2:2 or 4:4:4 depending
on the coding method.
HDTV will have a sampling frequency of 54 MHz.
The following tables show the memory requirements for the field buffer and the number of memory
chips when the SDA 9251 is used.
Table 1
Memory Requirements for the Digital TV-Field Buffer
Table 2
Number of Required Memory Devices in the Field Buffer when Using the SDA 9251
Clock Rate
Bus Width
Y:U:V
13.5 MHz
54 MHz
4:1:1
4:2:2
4:4:4
2.37 Mbit
3.16 Mbit
4.75 Mbit
9.49 Mbit
12.66 Mbit
18.98 Mbit
12 bit
16 bit
24 bit
Clock Rate
Bus Width
Y:U:V
4:1:1
4:2:2
4:4:4
13.5 MHz
3
4
6
54 MHz
12
16
24
12 bit
16 bit
24 bit
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PDF描述 |
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| SDA9253 | 2.6 MBit Dynamic Sequential Access Memory for Television Applications (TV-SAM) |
| SDA9254-2 | 2.6 MBit Dynamic Sequential Access Memory for Television Applications (TV-SAM) with On-chip Noise Reduction Filter |
| SDA9257 | Clock Sync Generator |
| SDA9280 | ICs for Consumer Electronics |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SDA9253 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:2.6 MBit Dynamic Sequential Access Memory for Television Applications (TV-SAM) |
| SDA9254-2 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:2.6 MBit Dynamic Sequential Access Memory for Television Applications (TV-SAM) with On-chip Noise Reduction Filter |
| SDA9255 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:SRC-Scan Rate Converter SDA9255 |
| SDA9257 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Clock Sync Generator |
| SDA9270 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics |
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