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參數(shù)資料
| 型號(hào)： | ASM2I2313ANZ |
| 廠商： | Alliance Semiconductor Corporation |
| 英文描述： | 13 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
| 中文描述： | 13輸出，3.3V的SDRAM內(nèi)存緩沖器，用于桌面電腦，3個(gè)DIMM |
| 文件頁數(shù)： | 9/13頁 |
| 文件大?。?/td> | 513K |
| 代理商： | ASM2I2313ANZ |
June 2005
rev 0.4
ASM2I2313ANZ
13 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs
9 of
13
Notice: The information in this document is subject to change without notice.
C
d
= 0.1
μ
F
Application Information
Clock traces must be terminated with either series or parallel termination, as is normally done.
Application Circuit
Summary
Surface mount, low-ESR, ceramic capacitors should be used for filtering. Typically, these capacitors have a value
of 0.1
μ
F. In some cases, smaller value capacitors may be required.
The value of the series terminating resistor satisfies the following equation, where Rtrace is the loaded characteristic
impedance of the trace, Rout is the output impedance of the buffer (typically 25
), and Rseries is the series terminating
resistor.
Rseries > Rtrace – Rout
Footprints must be laid out for optional EMI-reducing capacitors, which should be placed as close to the terminating
resistor as is physically possible. Typical values of these capacitors range from 4.7pF to 22pF.
A Ferrite Bead may be used to isolate the Board V
DD
from the clock generator V
DD
island. Ensure that the Ferrite Bead
offers greater than 50
impedance at the clock frequency, under loaded DC conditions.
If a Ferrite Bead is used, a 10
μ
F–22
μ
F tantalum bypass capacitor should be placed close to the Ferrite Bead. This
capacitor prevents power supply droop during current surges.
C
d
= DECOUPLING CAPACITORS
C
t
= OPTIONAL EMI-REDUCING CAPACITORS
R
s
= SERIES TERMINATING RESISTORS
Rs
BUF_IN
SDATA
SCLK
V
DD
V
SS
Rs
SDRAM (0.12)
C
t
3.3V
ASM2I2313ANZ
28-Pin SOIC
CPUCLK
SDATA
SCLK
SDRAM(0.12)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ASM2I2314ANZ | 14 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
| ASM2I2314ANZ-28-SR | Circular Connector; No. of Contacts:128; Series:MS27508; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:24; Circular Contact Gender:Socket; Circular Shell Style:Box Mount Receptacle RoHS Compliant: No |
| ASM2I2314ANZ-28-ST | Circular Connector; No. of Contacts:56; Series:MS27508; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:24; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:24-4 RoHS Compliant: No |
| ASM2I2314AGNZ-28-SR | 14 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
| ASM2I2314AGNZ-28-ST | 14 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ASM2I2313ANZ-28-SR | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:13 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
| ASM2I2313ANZ-28-ST | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:13 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
| ASM2I2314AGNZ-28-SR | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:14 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
| ASM2I2314AGNZ-28-ST | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:14 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
| ASM2I2314ANZ | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:14 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
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