- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄378999 > CY2276A-13 (Cypress Semiconductor Corp.) PentiumII Clock Synthesizer/Driver for Desktop PCs with Intel 82440LX and 4 DIMMs(帶英特爾82440LX 和4個DIMM的應用于桌上型PC機的奔騰II時鐘合成器/驅(qū)動器) PDF資料下載
參數(shù)資料
| 型號： | CY2276A-13 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | PentiumII Clock Synthesizer/Driver for Desktop PCs with Intel 82440LX and 4 DIMMs(帶英特爾82440LX 和4個DIMM的應用于桌上型PC機的奔騰II時鐘合成器/驅(qū)動器) |
| 中文描述： | PentiumII時鐘合成器/與英特爾82440LX和4個DIMM臺式機驅(qū)動器（帶英特爾82440LX和4個DIMM內(nèi)存的應用于桌上型電腦機的奔騰二時鐘合成器/驅(qū)動器） |
| 文件頁數(shù)： | 1/11頁 |
| 文件大?。?/td> | 164K |
| 代理商： | CY2276A-13 |
Pentium
II Clock Synthesizer/Driver for Desktop PCs
with Intel 82440LX and 4 DIMMs
CY2276A-12
CY2276A-13
Cypress Semiconductor Corporation
3901 North First Street
San Jose
CA 95134
408-943-2600
October 12, 1998
2
Features
Mixed 2.5V and 3.3V operation
Complete clock solution to meet requirements of Pen-
tium
and Pentium
II motherboards
—Five CPU clocks at 2.5V
—Sixteen 3.3V SDRAM clocks
—Seven synchronous PCI clocks, one free-running
—Three 2.5V IOAPIC clocks at 14.318 MHz
—One 3.3V Ref. clock at 14.318 MHz
1 ns–6 ns CPU-PCI delay (-12 option)
1 ns–4.8 ns CPU-PCI delay (-13 option)
I
2
C Serial Configuration Interface
Dedicated OE input
Factory-EPROM programmable output drive and slew
rate for EMI customization
Factory-EPROM programmable CPU clock frequencies
for custom configurations
High drive, low skew, and low jitter outputs
Intel Test Mode support
Available in space-saving 56-pin SSOP package
Functional Description
The CY2276A-12 and CY2276A-13 are Clock Synthesiz-
er/Drivers for Pentium or Pentium II-based PCs designed with
an Intel 82440LX or similar core-logic chipset.
The CY2276A-12 and CY2276A-13 output five CPU clocks at
2.5V. There are seven PCI clocks, at one half the CPU clock
frequency, one of which is free-running. Additionally, the parts
drive out sixteen 3.3V SDRAM clocks at the CPU clock fre-
quency, three 2.5V IOAPIC clocks at 14.318 MHz, and one
3.3V reference clock at 14.318 MHz.
The CY2276A-12 and CY2276A-13 can be used with a periph-
eral clock generator (CY2030) which can generate USB, I/O,
reference, and Audio clocks, thus providing a complete solu-
tion for motherboard manufacturers.
The CY2276A-12 and CY2276A-13 outputs are designed for
low EMI emission. Controlled rise and fall times, unique output
driver circuits and factory-EPROM programmable output drive
and slew-rate enable optimal configurations for EMI control.
CY2276A Selector Guide
Clocks Outputs
CPU@2.5V (66.6 MHz)
SDRAM
PCI (33.3 MHz)
IOAPIC (14.318 MHz)
Ref (14.318MHz)
CPU-PCI delay
Note:
1.
One free-running PCI clock.
-12
5
16
7
[1]
3
1
-13
5
15
7
[1]
3
1
1–6 ns
1–4.8 ns
Intel and Pentium are registered trademarks of Intel Corporation.
I
2
C is a trademark of Philips Corporation.
Pin Configuration
56 SSOP
Logic Block Diagram
XTALOUT
XTALIN
IOAPIC [0:2] (14.318 MHz)
14.318
MHz
OSC.
SDRAM [0–15]
OE
V
DDQ2
REF0 (14.318 MHz)
CPU
PLL
/2
Delay
SCLK
SDATA
CPUCLK [0–4]
V
DDCPU
PCI [0–5]
PCICLK_F
INTERFACE
CONTROL
LOGIC
SERIAL
1
2
3
4
5
6
7
8
9
10
11
12
13
33
32
31
30
29
36
35
34
AV
DD
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
45
44
43
42
41
37
38
39
40
48
47
46
IOAPIC2
REF0
V
SS
49
52
51
50
53
56
55
54
V
SS
V
SS
V
SS
V
SS
OE
MODE
V
SS
SDRAM12
SDRAM13
V
SS
SDRAM4
V
SS
CPUCLK4
V
SS
CPUCLK0
V
DDQ3
V
DDQ3
V
DDQ3
SDRAM9
SDRAM8
V
DDQ3
SDATA
SCLK
V
DDQ3
SDRAM6
V
DDQ3
SDRAM2
V
DDCPU
CPUCLK2
V
DDQ2
IOAPIC0
XTALIN
XTALOUT
PCICLK_F
PCICLK0
PCICLK1
PCICLK2
PCICLK3
PCICLK4
PCICLK5
SDRAM11
SDRAM10
SDRAM15
SDRAM14
SDRAM7
SDRAM5
SDRAM3
SDRAM1
SDRAM0
CPUCLK3
CPUCLK1
IOAPIC1
相關PDF資料 |
PDF描述 |
|---|---|
| CY2276A-21 | PentiumII Clock Synthesizer/Driver for Desktop PCs with Intel 82440LX and 3SO- DIMMs(帶英特爾82440LX 和3SO-DIMM的應用于桌上型PC機的奔騰II時鐘合成器/驅(qū)動器) |
| CY2276A-31 | PentiumII Clock Synthesizer/Driver for Desktop PCs with Intel 82440LX and 3SO- DIMMs(帶英特爾82440LX 和3SO-DIMM的應用于桌上型PC機的奔騰II時鐘合成器/驅(qū)動器) |
| CY2278A | PentiumII Clock Synthesizer/Driver for Mobile PCs with Intel 82430TX and No SDRAM(帶英特爾82430TX和2個DIMM 或3個SO-DIMM 的應用于移動PC機的奔騰II6x86, K6 時鐘合成器/驅(qū)動器) |
| CY22800-082A | Universal Programmable Clock Generator (UPCG) |
| CY22800 | Universal Programmable Clock Generator (UPCG) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| CY2276PVC-3 | 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-4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
發(fā)布緊急采購，3分鐘左右您將得到回復。