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参数资料
| 型号： | CY2254A |
| 厂商： | Cypress Semiconductor Corp. |
| 英文描述： | Pentium Processor Compatible Clock Synthesizer/Driver(奔腾处理器兼容的时钟合成器/驱动器) |
| 中文描述： | 奔腾处理器兼容的时钟合成器/驱动器（奔腾处理器兼容的时钟合成器/驱动器） |
| 文件页数： | 4/6页 |
| 文件大小： | 86K |
| 代理商： | CY2254A |
CY2254A
4
Switching Characteristics
[5]
Parameter
Output
Name
Description
Min.
Max.
Unit
t
1
t
2[4]
All
Output Duty Cycle
[6]
t
1
= t
1A
÷
t
1B
Measured between 0.4 and 2.4V
45%
55%
CPUCLK, PCICLK
Output Rising and Fall-
ing Edge Rate
1
V/ns
t
3[4]
t
4[4]
t
5[4]
t
6[4]
t
7[4]
REF, KBDCLK, USBCLK
Rise Time
Measured between 0.4 and 2.4V
4
ns
REF, KBDCLK, USBCLK
Fall Time
Measured between 2.4 and 0.4V
4
ns
CPUCLK
CPU-CPU Clock Skew
Measured at 1.5V
250
ps
PCICLK
PCI-PCI Clock Skew
Measured at 1.5V
250
ps
CPUCLK, PCICLK
CPU-PCI Skew
Measured at 1.5V (
1 option)
1
4
ns
Measured at 1.5V (
2 option)
500
ps
t
8[4]
CPUCLK
Cycle-Cycle Clock Jitter
CPU Clock Jitter
200
ps
Switching Waveforms
Notes:
5.
6.
All parameters specified with outputs fully loaded.
Duty cycle is measured at 1.5V.
Duty Cycle Timing
t
1B
2254–2
t
1A
1.5V
1.5V
1.5V
All Outputs Rise/Fall Time
2254–3
OUTPUT
t
2
t
3
3.3V
0V
0.4V
2.4V
2.4V
0.4V
t
2
t
4
Clock Skew
2254–4
CPUCLK/
PCICLK
1.5V
1.5V
t
5
t
6
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|---|---|
| CY2254 | Two-PLL Clock Generator(二锁相环时钟发生器) |
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| CY2273A | Pentium㈢/II, 6x86, K6 Clock Synthesizer/Driver for Desktop PCs with Intel 82430TX, 82440LX or ALI IV/IV+, AGP and 3 DIMMs |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CY2254ASC-1 | 制造商:Rochester Electronics LLC 功能描述:PENTIUM COMPATIBLE CLOCK GENERATOR/DRIVER - Bulk |
| CY2254ASC-1T | 制造商:Cypress Semiconductor 功能描述:Pentium Processor Compatible 28-Pin SOIC T/R 制造商:Rochester Electronics LLC 功能描述:PENTIUM COMPATIBLE CLOCK GENERATOR/DRIVER - Tape and Reel |
| CY2254ASC-2 | 制造商:Cypress Semiconductor 功能描述:Pentium Processor Compatible 28-Pin SOIC |
| CY2255 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:CPU System Clock Generator |
| CY225670SNC | 制造商:Cypress Semiconductor 功能描述: |
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