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参数资料
| 型号： | ASM2I2314ANZ-28-SR |
| 厂商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分类： | 时钟及定时 |
| 英文描述： | 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 |
| 中文描述： | 2314 SERIES, LOW SKEW CLOCK DRIVER, 14 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO28 |
| 封装： | 0.300 INCH, SOIC-28 |
| 文件页数： | 9/13页 |
| 文件大小： | 515K |
| 代理商： | ASM2I2314ANZ-28-SR |
June 2005
rev 0.4
ASM2I2314ANZ
14 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
C
t
= OPTIONAL EMI-REDUCING CAPACITORS
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
R
s
= SERIES TERMINATING RESISTORS
Rs
BUF_IN
SDATA
SCLK
V
DD
V
SS
Rs
SDRAM (0.13)
C
t
V
DD
3.3V
ASM2I2314ANZ
28-Pin SOIC
CPUCLK
SDATA
SCLK
SDRAM (0.13)
相关PDF资料 |
PDF描述 |
|---|---|
| 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 |
| ASM2I2318AGNZ-48-AR | 18 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
| ASM2I2318AGNZ-48-AT | 18 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ASM2I2314ANZ-28-ST | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:14 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
| ASM2I2318AGNZ-48-AR | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:18 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
| ASM2I2318AGNZ-48-AT | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:18 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
| ASM2I2318ANZ | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:18 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
| ASM2I2318ANZ-48-AR | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:18 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs |
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