- 您现在的位置：买卖IC网 > PDF目录67685 > ICS813001AGILFT (INTEGRATED DEVICE TECHNOLOGY INC) 640 MHz, OTHER CLOCK GENERATOR, PDSO24 PDF资料下载
参数资料
| 型号： | ICS813001AGILFT |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 640 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| 封装： | 4.40 X 7.80 MM, 0.92 MM HEIGHT, ROHS COMPLIANT, MO-153, TSSOP-24 |
| 文件页数： | 2/19页 |
| 文件大小： | 456K |
| 代理商： | ICS813001AGILFT |
813001AGI
www.icst.com/products/hiperclocks.html
REV. A SEPTEMBER 2, 2005
10
Integrated
Circuit
Systems, Inc.
ICS813001I
DUAL VCXO W/3.3V, 2.5V LVPECL
FEMTOCLOCK PLL
l
o
b
m
y
Sr
e
t
e
m
a
r
a
Ps
n
o
i
t
i
d
n
o
C
t
s
e
Tm
u
m
i
n
i
Ml
a
c
i
p
y
Tm
u
m
i
x
a
Ms
t
i
n
U
C
W
O
L
_
V
e
c
n
a
t
i
c
a
p
a
C
r
o
t
c
a
r
a
V
w
o
LV
C
V
0
=5
1F
p
C
H
G
I
H
_
V
e
c
n
a
t
i
c
a
p
a
C
r
o
t
c
a
r
a
V
h
g
i
HV
C
V
3
.
3
=4
.
7
2F
p
TABLE 7.VARACTOR PARAMETERS
FORMULAS
(
) (
)
() (
)
Low
V
S
L
Low
V
S
L
Low
V
S
L
Low
V
S
L
Low
C
_
2
_
1
_
2
_
1
+
+
=
(
) (
)
() (
)
High
V
S
L
High
V
S
L
High
V
S
L
High
V
S
L
High
C
_
2
_
1
_
2
_
1
+
+
=
6
0
1
0
1
0
10
1
2
1
2
1
)
(
+
+
=
C
TPR
Range
Pull
Total
High
Low
C
Low
is the effective capacitance due to the low varactor capacitance, load capacitance and stray capacitance.
C
Low
determines the high frequency component on the TPR.
C
High
is the effective capacitance due to the high varactor capacitance, load capacitance and stray capacitance.
C
High
determines the low frequency component on the TPR.
Absolute Pull Range (APR) = Total Pull Range – (Frequency Tolerance + Frequency Stability + Aging)
EXAMPLE CALCULATIONS
Using the tables and figures above, we can now calculate the
TPR and APR of the VCXO using the example crystal
parameters. For the numerical example below there were
some assumptions made. First, the stray capacitance (C
S1,
C
S2), which is all the excess capacitance due to board
parasitic, is 4pF. Second, the expected lifetime of the project
is 5 years; hence the inaccuracy due to aging is ±15ppm.
Third, though many boards will not require load tuning
capacitors (C
L1, CL2), it is recommended for long-term
consistent performance of the system that two tuning
capacitor pads be placed into every design. Typical values
for the load tuning capacitors will range from 0 to 4pF.
TPR = ±106ppm
APR = 106ppm – (20ppm + 20ppm + 15ppm) = ±51ppm
The example above will ensure a total pull range of
±106 ppm with an APR of ±51ppm. Many times, board
designers may select their own crystal based on their
application. If the application requires a tighter APR, a crystal
with better pullability (C0/C1 ratio) can be used. Also, with the
equations above, one can vary the frequency tolerance,
temperature stability, and aging or shunt capacitance to
achieve the required pullability.
C
Low =
(0 + 4p + 15p ) (0 + 4p + 15p )
= 9.5p
C
High =
(0 + 4p + 27.4p ) (0 + 4p + 27.4p )
= 15.7p
1
1
2 220
(1 + 9.5p
4p )
2 220
(1 +15.7p
4p )
1
–
TPR =
= 106 = 212ppm
ICS813001I
DUAL VCXO W/3.3V, 2.5V LVPECL FEMTOCLOCK PLL
TSD
IDT / ICS DUAL VCXO W/3.3V, 2.5V LVPECL FEMTOCLOCK PLL
ICS813001I
10
相关PDF资料 |
PDF描述 |
|---|---|
| ICS82C404-XXCN16-LF | 120 MHz, VIDEO CLOCK GENERATOR, PDIP16 |
| ICS82C404MLF | 120 MHz, VIDEO CLOCK GENERATOR, PDSO16 |
| ICS83023AMILFT | 83023 SERIES, LOW SKEW CLOCK DRIVER, 1 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8 |
| ICS83026AMILF | 83026 SERIES, LOW SKEW CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8 |
| ICS83026AMILFT | 83026 SERIES, LOW SKEW CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS813001AGIT | 制造商:ICS 制造商全称:ICS 功能描述:DUAL VCXO W/3.3V, 2.5V LVPECL FEMTOCLOCK-TM PLL |
| ICS813001I | 制造商:ICS 制造商全称:ICS 功能描述:DUAL VCXO W/3.3V, 2.5V LVPECL FEMTOCLOCK-TM PLL |
| ICS813076BYI-31LF | 功能描述:IC VCXO-PLL WIRELESS 48-TQFP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:- 标准包装:27 系列:Precision Edge® 类型:频率合成器 PLL:是 输入:PECL，晶体 输出:PECL 电路数:1 比率 - 输入:输出:1:1 差分 - 输入:输出:无/是 频率 - 最大:800MHz 除法器/乘法器:是/无 电源电压:3.135 V ~ 5.25 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| ICS813076BYI-31LFT | 功能描述:IC VCXO-PLL WIRELESS 48-TQFP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:- 标准包装:27 系列:Precision Edge® 类型:频率合成器 PLL:是 输入:PECL，晶体 输出:PECL 电路数:1 比率 - 输入:输出:1:1 差分 - 输入:输出:无/是 频率 - 最大:800MHz 除法器/乘法器:是/无 电源电压:3.135 V ~ 5.25 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| ICS813076CYILF | 功能描述:IC VCXO-PLL WIRELESS 64-TQFP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, FemtoClock™ 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
发布紧急采购，3分钟左右您将得到回复。