- 您现在的位置：买卖IC网 > PDF目录361775 > W250-03 Clocks and Buffers PDF资料下载
参数资料
| 型号： | W250-03 |
| 英文描述： | Clocks and Buffers |
| 中文描述： | 时钟和缓冲器 |
| 文件页数： | 10/12页 |
| 文件大小： | 120K |
| 代理商： | W250-03 |
W250-03
PRELIMINARY
Document #: 38-07254 Rev. *A
Page 10 of 12
REF Clock Outputs (Lump Capacitance Test Load = 20 pF)
Parameter
Description
f
Frequency, Actual
t
R
Output Rise Edge Rate
t
F
Output Fall Edge Rate
t
D
Duty Cycle
f
ST
Frequency Stabilization from
Power-up (cold start)
Test Condition/Comments
Frequency generated by crystal oscillator
Measured from 0.4V to 2.4V
Measured from 2.4V to 0.4V
Measured on rising and falling edge at 1.5V
Assumes full supply voltage reached within
1 ms from power-up. Short cycles exist prior to
frequency stabilization.
Average value during switching transition. Used
for determining series termination value.
Min.
Typ.
14.318
Max.
Unit
MHz
V/ns
V/ns
%
ms
0.5
0.5
45
2
2
55
3
Z
o
AC Output Impedance
40
48-MHz Clock Output (Lump Capacitance Test Load = 20 pF)
Parameter
Description
f
Frequency, Actual
f
D
Deviation from 48 MHz
m/n
PLL Ratio
t
R
Output Rise Edge Rate
t
F
Output Fall Edge Rate
t
D
Duty Cycle
f
ST
Frequency Stabilization
from Power-up (cold start)
Test Condition/Comments
Determined by PLL divider ratio (see m/n below)
(48.008
–
48)/48
(14.31818 MHz x 57/17 = 48.008 MHz)
Measured from 0.4V to 2.4V
Measured from 2.4V to 0.4V
Measured on rising and falling edge at 1.5V
Assumes full supply voltage reached within 1 ms
from power-up. Short cycles exist prior to fre-
quency stabilization.
Average value during switching transition. Used
for determining series termination value.
Min.
Typ.
48.008
+167
57/17
Max.
Unit
MHz
ppm
0.5
0.5
45
2
2
V/ns
V/ns
%
ms
55
3
Z
o
AC Output Impedance
40
24-MHz Clock Output (Lump Capacitance Test Load = 20 pF)
Parameter
Description
f
Frequency, Actual
f
D
Deviation from 24 MHz
m/n
PLL Ratio
t
R
Output Rise Edge Rate
t
F
Output Fall Edge Rate
t
D
Duty Cycle
f
ST
Frequency Stabilization
from Power-up (cold start)
Test Condition/Comments
Determined by PLL divider ratio (see m/n below)
(24.004
–
24)/24
(14.31818 MHz x 57/34 = 24.004 MHz)
Measured from 0.4V to 2.4V
Measured from 2.4V to 0.4V
Measured on rising and falling edge at 1.5V
Assumes full supply voltage reached within 1 ms
from power-up. Short cycles exist prior to fre-
quency stabilization.
Average value during switching transition. Used
for determining series termination value.
Min.
Typ.
24.004
+167
57/34
Max.
Unit
MHz
ppm
0.5
0.5
45
2
2
V/ns
V/ns
%
ms
55
3
Z
o
AC Output Impedance
40
Ordering Information
Ordering Code
W250-03
Package
Name
H
Package Type
48-pin SSOP (300 mils)
相关PDF资料 |
PDF描述 |
|---|---|
| W254B | Clocks and Buffers |
| W255 | Clocks and Buffers |
| W255H | 200-MPz 24-Output Buffer for 4DDR or 3 SDRAM DIMMS |
| W255HT | 200-MPz 24-Output Buffer for 4DDR or 3 SDRAM DIMMS |
| W25P010AD-8 | x32 Fast Synchronous SRAM |
相关代理商/技术参数 |
参数描述 |
|---|---|
| W25060 | 制造商:DANAHER - INDUSTRIAL/SPECIALTY 功能描述:LS-700 |
| W250-A1A | 制造商:Leach International Corporation 功能描述:TERMINAL & SPLICE - Bulk |
| W250-A1AD | 制造商:Leach International Corporation 功能描述:CONTACT PS FOR PRC'G - Bulk |
| W250-A1CD | 制造商:Leach International Corporation 功能描述:TERMINAL & SPLICE - Bulk |
| W250ACPCX-14 | 制造商:Magnecraft 功能描述: |
发布紧急采购，3分钟左右您将得到回复。