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参数资料
| 型号： | CY2273APVC-3 |
| 厂商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分类： | XO, clock |
| 英文描述： | Pentium㈢/II, 6x86, K6 Clock Synthesizer/Driver for Desktop PCs with Intel 82430TX, 82440LX or ALI IV/IV+, AGP and 3 DIMMs |
| 中文描述： | 66.67 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封装： | SSOP-48 |
| 文件页数： | 3/14页 |
| 文件大小： | 178K |
| 代理商： | CY2273APVC-3 |
CY2273A
3
Pin Summary
Name
V
DDQ3
Pins (-1, -4)
6, 14, 19, 30, 36,
48
N/A
42
1
3, 9, 16, 22, 27,
33, 39, 45
4
5
28
Pins (-2)
6, 14, 19, 30, 36,
48
N/A
42
1
3, 9, 16, 22, 27,
33, 39, 45
4
5
28
Pins (-3)
6, 14, 19, 30, 36
Description
3.3V Digital voltage supply
V
DDQ2
V
DDCPU
AV
DD
V
SS
48
42
23
3, 9, 16, 22, 27,
33, 39, 45
4
5
28
IOAPIC Digital voltage supply, 2.5V
CPU Digital voltage supply, 2.5V or 3.3V
Analog voltage supply, 3.3V
Ground
XTALIN
[2]
XTALOUT
[2]
SDRAM7/
PCI_STOP
SDRAM6/
CPU_STOP
SDRAM5/
PWR_DWN
SDRAM[0:4],
[8:11]
SEL0
SEL1
CPUCLK[0:3]
PCICLK[0:5] or
PCICLK[0:3]
PCICLK_F
AGPCLK[0:1]
IOAPIC
REF0
USBCLK
SDATA
SCLK
MODE
Reference crystal input
Reference crystal feedback
SDRAM clock output. Also, active low control input
to stop PCI clocks, enabled when MODE is LOW.
SDRAM clock output. Also, active low control input
to stop CPU clocks, enabled when MODE is LOW.
SDRAM clock output. Also, active low control input
to power down device, enabled when MODE is LOW.
SDRAM clock outputs
29
29
29
31
31
31
38, 37, 35, 34,
32, 21, 20, 18, 17
26
46
44, 43, 41, 40
8, 10, 11, 12, 13,
15
7
N/A
N/A
2
47
23
24
25
38, 37, 35, 34,
32, 21, 20, 18, 17
26
46
44, 43, 41, 40
8, 10, 11, 12
38, 37, 35, 34,
32, 21, 20, 18, 17
46
N/A
44, 43, 41, 40
8, 10, 11, 12, 13,
15
7
N/A
47
2
1
24
25
26
CPU frequency select input, bit 0 (See table below.)
CPU frequency select input, bit 0 (See table below.)
CPU clock outputs
PCI clock outputs, at 30 or 33.33 MHz
7
13, 15
N/A
2
47
23
24
25
Free-running PCI clock output
AGP clock outputs at 60 or 66.66 MHz
IOAPIC clock output
3.3V Reference clock output
USB Clock output at 48 MHz
Serial data input for serial configuration port
Serial clock input for serial configuration port
Mode Select pin for enabling power management
features
Note:
2.
For best accuracy, use a parallel-resonant crystal, C
LOAD
= 18 pF.
Function Table (-1, -2 and -4)
SEL1
SEL0
CPU/PCI
Ratio
CPUCLK[0:3]
SDRAM[0:11]
PCICLK[0:5]
PCICLK_F
AGP
(-2 Only)
REF0
IOAPIC
USBCLK
0
0
2
60.0 MHz
30.0 MHz
60.0 MHz
14.318 MHz
48 MHz
0
1
2
66.67 MHz
33.33 MHz
66.66 MHz
14.318 MHz
48 MHz
1
0
2.5
75.0 MHz
30.0 MHz
60.0 MHz
14.318 MHz
48 MHz
1
1
2.5
83.33 MHz
33.33 MHz
66.66 MHz
14.318 MHz
48 MHz
Function Table (-3)
SEL0
0
CPU/PCI Ratio
2
CPUCLK[0:3]/SDRAM[0:11]
60.0 MHz
PCICLK[0:5],PCICLK_F
30.0 MHz
REF0/IOAPIC
14.318 MHz
USBCLK
48 MHz
1
2
66.67 MHz
33.33 MHz
14.318 MHz
48 MHz
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CY2273APVC-4 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CY2273PVC-1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:CPU System Clock Generator |
| CY2273PVC-2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:CPU System Clock Generator |
| CY2273PVC-3 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:CPU System Clock Generator |
| CY2274APVC1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Interface IC |
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