- 您现在的位置：买卖IC网 > PDF目录67705 > ICS9248YF-87LF (INTEGRATED DEVICE TECHNOLOGY INC) 150 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 PDF资料下载
参数资料
| 型号： | ICS9248YF-87LF |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 150 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封装： | 0.300 INCH, SSOP-48 |
| 文件页数： | 6/13页 |
| 文件大小： | 362K |
| 代理商： | ICS9248YF-87LF |
2
ICS9248-87
Preliminary Product Preview
Third party brands and names are the property of their respective owners.
General Description
Pin Configuration
Power Groups
GNDREF, VDDREF = REF1, X1, X2
GNDPCI, VDDPCI = PCICLK [7:0]
GNDSDRAM, VDDSDRAM = SDRAM [8:0]
GND3V66,VDD3V66=3V66
VDD48 = 48MHz, 24MHz
GNDCOR, VDDCOR = supply for PLL core
VDDLAPIC = IOAPIC
GNDLCPU, VDDLCPU = CPUCLKL [1:0]
The ICS9248-87 is the single chip clock solution for designs
using 810/810E style chipset. It provides all necessary clock
signals for such a system.
Spread spectrum may be enabled through I2C programming.
Spread spectrum typically reduces system EMI by 8dB to
10dB. This simplifies EMI qualification without resorting to
board design iterations or costly shielding. The ICS9248-87
employs a proprietary closed loop design, which tightly
controls the percentage of spreading over process and
temperature variations.
Serial programming I2C interface allows changing functions,
stop clock programming and frequency selection.
PIN NUMBER
PIN NAME
TYPE
DESCRIPTION
REF1
OUT
14.318 MHz reference clock.
FS3
IN
Frequency select pin.
2, 6, 16, 24, 27, 34,
42
VDD
PWR
3.3V Power supply for SDRAM output buffers, PCI output buffers, reference
output buffers and 48MHz output
3
X1
IN
Crystal input,nominally 14.318MHz.
4
X2
OUT
Crystal output, nominally 14.318MHz.
5, 9, 13, 20, 26, 30,
38
GND
PWR
Ground pin for 3V outputs.
8, 7
3V66 [1:0]
OUT
3V66 clock outputs.
FS0
IN
Frequency select pin.
PCICLK0
OUT
PCI clock output.
FS1
IN
Frequency select pin.
PCICLK1
OUT
PCI clock output.
FS2
IN
Frequency select pin.
PCICLK2
OUT
PCI clock output.
19, 18, 17, 15, 14
PCICLK [7:3]
OUT
PCI clock outputs.
21, 22
48MHz
OUT
48MHz output clocks
SEL24_48#
IN
Sel pin for enabling 24MHz or 48MHz
H=24MHz L=48MHz
24_48MHz
OUT
Clock output for super I/O/USB
25
SDATA
IN
Data input for I2C serial input, 5V tolerant input
28
SCLK
IN
Clock input of I2C input, 5V tolerant input
29
PD#
IN
Asynchronous active low input pin used to power down the device into a low
power state. The internal clocks are disabled and the VCO and the crystal are
stopped. The latency of the power down will not be greater than 3ms.
31
SDRAM_F
OUT
SDRAM clock output - free running not affected by I
2C
32, 33, 35, 36, 37,
39, 40, 41
SDRAM [7:0]
OUT
SDRAM clock outputs
43
GNDLCPU
PWR
Ground pin for the CPU clocks.
44, 45
CPUCLK [1:0]
OUT
CPU clock outputs.
46
VDDLCPU
PWR
Power pin for the CPUCLKs. 2.5V
47
IOAPIC
OUT
2.5V clock output
48
VDDLAPIC
PWR
Power pin for the IOAPIC. 2.5V
23
1
11
12
10
相关PDF资料 |
PDF描述 |
|---|---|
| ICS9248YF-90LF-T | 132.99 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| ICS9248YF-90LF | 132.99 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| ICS9248YF-95LF | 124 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| ICS9248YF-96LF-T | 150 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| ICS9248YFI-81LF | 133.3 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS9248YF-90-T | 制造商:ICS 制造商全称:ICS 功能描述:Frequency Generator & Integrated Buffers for PENTIUM/ProTM |
| ICS9248YF-96LF-T | 制造商:ICS 制造商全称:ICS 功能描述:Frequency Generator & Integrated Buffers for Celeron & PII/III⑩ |
| ICS9248YF-96-T | 制造商:ICS 制造商全称:ICS 功能描述:Frequency Generator & Integrated Buffers for Celeron & PII/III⑩ |
| ICS9248YF-97-T | 制造商:ICS 制造商全称:ICS 功能描述:Frequency Timing Generator for PENTIUM II Systems |
| ICS9248YF-98-T | 制造商:ICS 制造商全称:ICS 功能描述:Frequency Generator & Integrated Buffers for Celeron & PII/III⑩ |
发布紧急采购，3分钟左右您将得到回复。