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參數(shù)資料
| 型號(hào)： | W48S87 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | Spread Spectrum 3 DIMM Desktop Clock |
| 中文描述： | 擴(kuò)頻3個(gè)DIMM桌面時(shí)鐘 |
| 文件頁數(shù)： | 3/19頁 |
| 文件大小： | 248K |
| 代理商： | W48S87 |
W48S87-72
3
PWR_DWN#
44
I
Power-Down Control:
When this input is LOW, the device goes into a low-
power standby condition. All outputs are actively held LOW while in power-
down. CPU, SDRAM, and PCI clock outputs are stopped LOW after completing
a full clock cycle (2
–
4 CPU clock cycle latency). When brought HIGH, CPU,
SDRAM, and PCI outputs start with a full clock cycle at full operating frequency
(3 ms maximum latency).
MODE
6
I
Mode Control:
This input selects the function of device pin 26
(SDRAM7/PCI_STOP#) and pin 27 (SDRAM6/CPU_STOP#). Refer to descrip-
tion for those pins.
Serial Data Input:
Data input for Serial Data Interface. Refer to Serial Data
Interface section that follows.
SDATA
19
I/O
SCLOCK
20
I
Serial Clock Input:
Clock input for Serial Data Interface. Refer to Serial Data
Interface section that follows.
VDDQ3
7, 15, 21, 25
28, 34, 48
P
Power Connection:
Power supply for PCI0:5, REF0:1, and 48/24MHz output
buffers. Connected to 3.3V supply.
VDDQ2
46, 40
P
Power Connection:
Power supply for IOAPIC0, CPU0:3 output buffer. Con-
nected to 2.5V supply.
Ground Connection:
Connect all ground pins to the common system ground
plane.
GND
3, 10, 17,
24, 31, 37,
43
G
Pin Definitions
(continued)
Pin Name
Pin
No.
Pin
Type
Pin Description
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| W48S87-72 | Desktop/Notebook Frequency Generator(桌上型電腦/筆記本電腦系統(tǒng)頻率發(fā)生器) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W48S87-04 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Spread Spectrum 3 DIMM Desktop Clock |
| W48S87-72 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Desktop/Notebook Frequency Generator |
| W48S87-72H | 制造商:Cypress Semiconductor 功能描述:Logic and Timing, Clock Generation, Desktop/Notebook Frequency Generator |
| W48S87-72XT | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| W49 | 制造商:CERAMATE 制造商全稱:CERAMATE 功能描述:3-Phase Motor Driver for CD-ROMs |
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