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参数资料
| 型号： | ICS84021AYLF |
| 厂商： | IDT, Integrated Device Technology Inc |
| 文件页数： | 6/19页 |
| 文件大小： | 0K |
| 描述： | IC SYNTHESIZER HIGH FREQ 32-LQFP |
| 标准包装： | 250 |
| 系列： | HiPerClockS™ |
| 类型： | 频率合成器 |
| PLL： | 带旁路 |
| 输入： | LVCMOS，LVTTL，晶体 |
| 输出： | LVCMOS，LVTTL |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:2 |
| 差分 - 输入:输出： | 无/无 |
| 频率 - 最大： | 260MHz |
| 除法器/乘法器： | 是/无 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-LQFP |
| 供应商设备封装： | 32-TQFP（7x7） |
| 包装： | 托盘 |
| 其它名称： | 84021AYLF |
ICS84021 Data Sheet
260MHz, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER
ICS84021BY REVISION E AUGUST 18, 2011
14
2011 Integrated Device Technology, Inc.
Layout Guideline
Figure 3 shows a schematic example of the ICS84021. In this
example, a series termination is shown. Additional LVCMOS
termination approaches are shown in the LVCMOS Termination
Application Note. In this example, an 18pF parallel resonant crystal
is used. The C1 = 22pF and C2 = 22pF are approximate values for
frequency accuracy. The C1 and C2 may be slightly adjusted for
optimizing frequency accuracy.
As with any high speed analog circuitry, the power supply pins are
vulnerable to noise. To achieve optimum jitter performance, power
supply isolation is required. The ICS84021 provides separate power
supplies to isolate from coupling into the internal PLL.
In order to achieve the best possible filtering, it is recommended that
the placement of the filter components be on the device side of the
PCB as close to the power pins as possible. If space is limited, the
0.1uF capacitor in each power pin filter should be placed on the
device side of the PCB and the other components can be placed on
the opposite side.
Power supply filter recommendations are a general guideline to be
used for reducing external noise from coupling into the devices. The
filter performance is designed for wide range of noise frequencies.
This low-pass filter starts to attenuate noise at approximately 10kHz.
If a specific frequency noise component is known, such as switching
power supply frequencies, it is recommended that component values
be adjusted and if required, additional filtering be added. Additionally,
good general design practices for power plane voltage stability
suggests adding bulk capacitances in the local area of all devices.
The schematic example focuses on functional connections and is not
configuration specific. Refer to the pin description and functional
tables in the datasheet to ensure the logic control inputs are properly
set.
Figure 3. ICS84021 Application Schematic Example
C17
0.1uF
C18
10uF
3.3V
BLM18BB221SN1
Ferrite Bead
1
2
VDDA
C20
10uF
3.3V, 2.5V or 1.8V
BLM18BB221SN2
Ferrite Bead
1
2
C19
0.1uF
C15
0.1u
C16
10u
R7
15 - 24
C14
0.1u
U1
ICS84021
M5
1
M6
2
M7
3
M8
4
N0
5
N1
6
nc
7
GND
8
T
EST
9
VD
D
10
OE1
11
OE0
12
VD
D
O
13
Q1
14
Q0
15
GN
D
16
MR
17
S_CLOCK
18
S_DATA
19
S_LOAD
20
VDDA
21
nXTAL_SEL
22
T_CLK
23
X_OUT
24
M4
32
M3
31
M2
30
M1
29
M0
28
VC
O_SEL
27
nP_LOAD
26
X_I
N
25
Set Logic
Input to '0'
To Logic
Input
pins
To Logic
Input
pins
RU2
Not Install
C2
22p
RU1
1K
RD2
1K
RD1
Not Install
X1
18pF
R2
43
C11
0.01u
C1
22p
R1
43
Zo = 50 Ohm
VDD
VDDO
VDD
Set Logic
Input to '1'
Logic Input Pin Examples
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS84021AYLFT | 功能描述:IC SYNTHESIZER HIGH FREQ 32-LQFP 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:HiPerClockS™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
| ICS84021AYT | 制造商:ICS 制造商全称:ICS 功能描述:260MHZ, CRYSTAL-TO-LVCMOS / LVTTL FREQUENCY SYNTHESIZER |
| ICS840245AGILF | 功能描述:IC FREQ SYNTHESIZER 16-TSSOP 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:HiPerClockS™, FemtoClock™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
| ICS840245AGILFT | 功能描述:IC FREQ SYNTHESIZER 16-TSSOP 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:HiPerClockS™, FemtoClock™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
| ICS84025 | 制造商:ICS 制造商全称:ICS 功能描述:CRYSTAL-TO-LVCMOS / LVTTL FREQUENCY SYNTHESIZER WITH FANOUT BUFFER |
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