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參數(shù)資料
| 型號(hào)： | CY2254ASC-1 |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | Pentium Processor Compatible Clock Synthesizer/Driver |
| 中文描述： | 66.66 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO28 |
| 封裝： | 0.300 INCH, SOIC-28 |
| 文件頁(yè)數(shù)： | 2/8頁(yè) |
| 文件大?。?/td> | 94K |
| 代理商： | CY2254ASC-1 |
CY2254A
Document #: 38-07203 Rev. *A
Page 2 of 8
Pin Summary
Name
V
DD
XTALIN
[1]
XTALOUT
[1]
V
SS
OE
CPUCLK0
CPUCLK1
V
DD
CPUCLK2
CPUCLK3
V
SS
S1
S0
V
DD
PCICLK0
PCICLK1
V
SS
PCICLK5
PCICLK4
V
DD
PCICLK3
PCICLK2
V
SS
IOCLK
KBDCLK
USBCLK
V
DD
REF1
REF0
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Description
Voltage supply
Reference crystal input
Reference crystal feedback
Ground
Output Enable, Active HIGH (internal pull-up resistor to V
DD
)
CPU clock output
CPU clock output
Voltage supply
CPU clock output
CPU clock output
Ground
CPU clock select input, bit 1 (internal pull-up resistor to V
DD
)
CPU clock select input, bit 0 (internal pull-up resistor to V
DD
)
Voltage supply
PCI clock output
PCI clock output
Ground
PCI clock output
PCI clock output
Voltage supply
PCI clock output
PCI clock output
Ground
I/O clock output (24 MHz)
Keyboard controller clock output (12 MHz)
Universal Serial Bus clock output (48 MHz)
Voltage supply
Reference clock output (14.318 MHz)
Reference clock output (14.318 MHz)
25
26
27
28
26
27
28
Function Table
Option
1,
2
1,
2
1,
2
1,
2
1
2
OE
0
S0
X
S1
X
XTALIN
14.318 MHz High-Z
CPUCLK
PCICLK
High-Z
Ref. Clock
Output
High-Z
IOCLK
High-Z
KBDCLK
1 only
High-Z
USBCLK
2 only
High-Z
1
0
0
14.318 MHz 50.0 MHz
25.0 MHz
14.318 MHz 24 MHz
12 MHz
48 MHz
1
0
1
14.318 MHz 60.0 MHz
30.0 MHz
14.318 MHz 24 MHz
12 MHz
48 MHz
1
1
0
14.318 MHz 66.66 MHz
TCLK
[2]
33.33 MHz
14.318 MHz 24 MHz
12 MHz
48 MHz
1
1
1
TCLK/2
TCLK/4
TCLK
TCLK/4
TCLK/8
1
1
1
14.318 MHz 55.0 MHz
27.5 MHz
14.318 MHz 24 MHz
48 MHz
Notes:
1.
2.
For best accuracy, use a parallel-resonant crystal, C
= 17 pF.
TCLK is a test clock on XTALIN (pin 2) during test mode.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY2254ASC-1T | 制造商:Cypress Semiconductor 功能描述:Pentium Processor Compatible 28-Pin SOIC T/R 制造商:Rochester Electronics LLC 功能描述:PENTIUM COMPATIBLE CLOCK GENERATOR/DRIVER - Tape and Reel |
| CY2254ASC-2 | 制造商:Cypress Semiconductor 功能描述:Pentium Processor Compatible 28-Pin SOIC |
| CY2255 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
| CY225670SNC | 制造商:Cypress Semiconductor 功能描述: |
| CY2256PVC-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 |
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