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參數(shù)資料
| 型號(hào)： | CY2275A |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | PentiumII Clock Synthesizer/Driver for Desktop PCs with Intel 82440LX with 3 DIMMs(帶英特爾82440LX 和 3個(gè)DIMM的應(yīng)用于桌上型PC機(jī)的奔騰II時(shí)鐘合成器/驅(qū)動(dòng)器) |
| 中文描述： | PentiumII時(shí)鐘合成器/ 82440LX與英特爾臺(tái)式機(jī)與3個(gè)DIMM驅(qū)動(dòng)器（帶英特爾82440LX和3個(gè)DIMM內(nèi)存的應(yīng)用于桌上型電腦機(jī)的奔騰二時(shí)鐘合成器/驅(qū)動(dòng)器） |
| 文件頁(yè)數(shù)： | 2/12頁(yè) |
| 文件大小： | 200K |
| 代理商： | CY2275A |
CY2275A
2
CPU and PCI Clock Driver Strengths
Matched impedances on both rising and falling edges on
the output drivers
Output impedance: 25
(typical) measured at 1.5V.
Pin Summary
Name
V
DDQ3
V
DDQ2
V
DDCPU
AV
DD
V
SS
Pins
6, 14, 19, 30, 36
Description
3.3V Digital voltage supply
48
IOAPIC Digital voltage supply, 2.5V
42
CPU Digital voltage supply, 2.5V
1
Analog voltage supply, 3.3V
3, 9, 16, 22, 27, 33,
39, 45
Ground
XTALIN
[2]
XTALOUT
[2]
4
Reference crystal input
5
Reference crystal feedback
SDRAM7/
PCI_STOP
28
SDRAM clock output. Also, active LOW control input to stop PCI clocks, enabled
when MODE is LOW.
SDRAM6/
CPU_STOP
29
SDRAM clock output. Also, active LOW control input to stop CPU clocks, enabled
when MODE is LOW.
SDRAM5/
PWR_DWN
31
SDRAM clock output. Also, active LOW control input to power down device, enabled
when MODE is LOW.
SDRAM[0:4],[8:11]
38, 37, 35, 34, 32,
21, 20, 18, 17
SDRAM clock outputs
OE
26
Active HIGH Output Enable Input (see table below)
CPUCLK[0:3]
44, 43, 41, 40
CPU clock outputs
PCICLK[0:5]
8, 10, 11, 12, 13, 15
PCI clock outputs, at one-half the CPU frequency
PCICLK_F
7
Free-running PCI clock output
IOAPIC[0:1]
47, 46
IOAPIC clock output
REF0
2
Reference clock outputs, 14.318 MHz, drives 45 pF load
SDATA
23
Serial data input for serial configuration port
SCLK
24
Serial clock input for serial configuration port
MODE
25
Mode Select pin for enabling power management features
Note:
2.
For best accuracy, use a parallel-resonant crystal, C
LOAD
= 18 pF.
Function Table
OE
XTALIN
14.318 MHz
CPUCLK[0:3]
SDRAM[0:11]
Hi-Z
PCICLK[0:5]
PCICLK_F
Hi-Z
REF0
IOAPIC[0:1]
Hi-Z
0
1
14.318 MHz
66.67 MHz
33.33 MHz
14.318 MHz
Actual Clock Frequency Values
Clock Output
CPUCLK
Target
Frequency
(MHz)
66.67
Actual
Frequency
(MHz)
66.654
PPM
–195
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CY2276A-12 | PentiumII Clock Synthesizer/Driver for Desktop PCs with Intel 82440LX and 4 DIMMs(帶英特爾82440LX 和4個(gè)DIMM的應(yīng)用于桌上型PC機(jī)的奔騰II時(shí)鐘合成器/驅(qū)動(dòng)器) |
| CY2276A-13 | PentiumII Clock Synthesizer/Driver for Desktop PCs with Intel 82440LX and 4 DIMMs(帶英特爾82440LX 和4個(gè)DIMM的應(yīng)用于桌上型PC機(jī)的奔騰II時(shí)鐘合成器/驅(qū)動(dòng)器) |
| CY2276A-21 | PentiumII Clock Synthesizer/Driver for Desktop PCs with Intel 82440LX and 3SO- DIMMs(帶英特爾82440LX 和3SO-DIMM的應(yīng)用于桌上型PC機(jī)的奔騰II時(shí)鐘合成器/驅(qū)動(dòng)器) |
| CY2276A-31 | PentiumII Clock Synthesizer/Driver for Desktop PCs with Intel 82440LX and 3SO- DIMMs(帶英特爾82440LX 和3SO-DIMM的應(yīng)用于桌上型PC機(jī)的奔騰II時(shí)鐘合成器/驅(qū)動(dòng)器) |
| CY2278A | PentiumII Clock Synthesizer/Driver for Mobile PCs with Intel 82430TX and No SDRAM(帶英特爾82430TX和2個(gè)DIMM 或3個(gè)SO-DIMM 的應(yīng)用于移動(dòng)PC機(jī)的奔騰II6x86, K6 時(shí)鐘合成器/驅(qū)動(dòng)器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY2275APVC-12 | 制造商:Cypress Semiconductor 功能描述:66.654 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| CY2275PVC-1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
| CY2276APVC-13 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
| CY2276PVC-1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
| CY2276PVC-2 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
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