參數(shù)資料
型號(hào): ICS950905
英文描述: Replaced by SN74ABT16541A : 16-Bit Buffers/Drivers With 3-State Outputs 48-TSSOP -40 to 85
中文描述: 可編程定時(shí)控制中心,為小四至⑩⑩
文件頁(yè)數(shù): 1/18頁(yè)
文件大?。?/td> 206K
代理商: ICS950905
Integrated
Circuit
Systems, Inc.
ICS950905
Advance Information
Block Diagram
950905 Rev - 11/26/01
Pin Configuration
Recommended Application:
VIA P4X266 chipset with PC133 or DDR memory.
Output Features:
2 - Pair of differential CPU clocks @ 3.3V
1 - Pair of differential push pull CPU_CS clocks @ 2.5V
3 - AGP @ 3.3V
9 - PCI @ 3.3V
1- IOAPIC @ 2.5V
1 - 48MHz @ 3.3V fixed
1 - 24_48MHz @ 3.3V
1 - REF @ 3.3V, 14.318MHz
Features/Benefits:
Programmable output frequency.
Programmable output divider ratios.
Programmable output rise/fall time.
Programmable output skew.
Programmable spread percentage for EMI control.
Watchdog timer technology to reset system
if system malfunctions.
Programmable watch dog safe frequency.
Support I
2
C Index read/write and block read/write
operations.
For DDR and or PC133 SDRAM system use ICS93718
as the memory buffer.
Uses external 14.318MHz crystal.
Key Specifications:
CPU_CS - CPU0: <±250ps
CPU_CS - AGP: <±250ps
PCI - PCI: <500ps
CPU - PCI: Min = 1.0ns, Typ = 2.0ns, Max = 4.0ns
Programmable Timing Control Hub for P4
1. These outputs have 2X drive strength.
* These inputs have a internal Pull-up resistor
of 120K to VDD
** These inputs have a internal pull-down to GND
48-Pin 300-mil SSOP
Frequency Table
I REF
PLL2
PLL1
Spread
Spectrum
48MHz
24_48MHz
IOAPIC
PCICLK (7:0)
AGPCLK (2:0)
RESET#
PCICLK_F
3
X1
X2
XTAL
OSC
CPU
DIVDER
CPU
DIVDER
IOAPIC
DIVDER
PCI
DIVDER
AGP
DIVDER
Stop
Stop
Stop
SEL24_48
SDATA
SCLK
FS (3:0)
PD#
PCI_STOP#
CPU_STOP#
MULTI_SEL
Vtt_PWRGD#
Control
Logic
Config.
Reg.
/ 2
REF0
CPUCLKT_(1:0)
CPUCLKC_(1:0)
CPUCLK_PPT
CPUCLK_PPC
WDEN
WDTB
0
L
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1
1
2
2
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r
R
f
A
0
F
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R
I
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4
=
h
o
0
5
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V
0
1
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m
h
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0
5
,
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m
1
5
7
4
3
=
=
r
R
f
A
2
F
E
R
I
*
6
=
h
o
0
5
@
V
7
3
S
F
2
S
F
1
S
F
0
S
F
K
L
C
H
U
P
M
C
z
P
z
G
H
A
M
K
L
z
C
I
H
C
M
P
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
0
0
0
0
0
6
0
6
6
6
0
7
0
7
0
8
0
8
0
9
8
6
9
0
1
6
3
1
4
0
2
6
6
0
0
1
0
0
2
3
3
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
7
0
0
0
0
0
0
0
8
0
8
6
6
0
6
0
7
0
7
0
7
0
7
8
6
2
6
8
6
8
6
6
6
6
6
6
6
6
6
0
0
0
0
0
0
0
0
0
3
0
0
0
0
0
0
0
4
0
4
3
3
0
3
0
3
0
3
0
3
0
3
4
3
6
3
4
3
4
3
3
3
3
3
3
3
3
3
0
0
0
0
0
0
0
0
ADVANCE INFORMATION
documents contain information on products in the formative or design phase development. Characteristic data and other specifications are design goals.
ICS reserves the right to change or discontinue these products without notice. Third party brands and names are the property of their respective owners.
1
**SEL24_48/REF0
VDDREF
GND
X1
X2
VDD48
*FS3/48MHz
*FS2/24_48MHz
GND
*FS0/PCICLK_F
**FS1/PCICLK0
*MULTI_SEL/PCICLK1
GND
PCICLK2
PCICLK3
VDDPCI
PCICLK4
PCICLK5
PCICLK6
GND
PCICLK7
*PD#
AGPCLK0
VDDAGP
*WDTB/
**WDEN/
VDDLAPIC
GND
N/C
IOAPIC
GND
VDDCPU_PP (2.5V)
CPUCLK_PPT
CPUCLK_PPC
CPUCLKT_0
CPUCLKC_0
VDDCPU (3.3V)
I REF
GND
CPUCLKT_1
CPUCLKC_1
Vtt_PWRGD#
CPU_STOP#*
PCI_STOP#*
RESET#
SDATA
SCLK
AGPCLK2
AGPCLK1
GND
I
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
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ICS950908BFLFT 功能描述:IC TIMING CTRL HUB P4 56-SSOP RoHS:是 類(lèi)別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 專(zhuān)用 系列:TCH™ 標(biāo)準(zhǔn)包裝:28 系列:- 類(lèi)型:時(shí)鐘/頻率發(fā)生器 PLL:是 主要目的:Intel CPU 服務(wù)器 輸入:時(shí)鐘 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:3:22 差分 - 輸入:輸出:無(wú)/是 頻率 - 最大:400MHz 電源電壓:3.135 V ~ 3.465 V 工作溫度:0°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:64-TFSOP (0.240",6.10mm 寬) 供應(yīng)商設(shè)備封裝:64-TSSOP 包裝:管件
ICS950908BGLF 功能描述:IC TIMING CTRL HUB P4 56-TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 專(zhuān)用 系列:TCH™ 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:時(shí)鐘/頻率發(fā)生器,多路復(fù)用器 PLL:是 主要目的:存儲(chǔ)器,RDRAM 輸入:晶體 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:1:2 差分 - 輸入:輸出:無(wú)/是 頻率 - 最大:400MHz 電源電壓:3 V ~ 3.6 V 工作溫度:0°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:16-TSSOP(0.173",4.40mm 寬) 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:Digi-Reel® 其它名稱(chēng):296-6719-6
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