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参数资料
| 型号： | ICS556M-04ILFT |
| 厂商： | IDT, Integrated Device Technology Inc |
| 文件页数： | 2/7页 |
| 文件大小： | 0K |
| 描述： | IC CLOCK BUFFER 1:4 27MHZ 8-SOIC |
| 标准包装： | 2,500 |
| 类型： | 扇出缓冲器（分配） |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:4 |
| 差分 - 输入:输出： | 无/无 |
| 输入： | 时钟，晶体 |
| 输出： | 时钟 |
| 频率 - 最大： | 27MHz |
| 电源电压： | 2.375 V ~ 5.25 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
| 其它名称： | 556M-04ILFT |
ICS556-04
LOW SKEW 1 TO 4 CLOCK BUFFER
CRYSTAL BUFFER
IDT / ICS LOW SKEW 1 TO 4 CLOCK BUFFER
2
ICS556-04
REV E 051310
Pin Assignment
Pin Descriptions
External Components
A minimum number of external components are required for proper operation. A decoupling capacitor of 0.01
F
should be connected between VDD on pin 1 and GND on pin 4, as close to the device as possible. A 33
series
terminating resistor may be used on each clock output if the trace is longer than 1 inch.
To achieve the low output skew that the ICS556-04 is capable of, careful attention must be paid to board layout.
Essentially, all four outputs must have identical terminations, identical loads, and identical trace geometries. If not,
the output skew will be degraded. For example, using a 30
series termination on one output (with 33 on the
others) will cause at least 15 ps of skew.
Crystal Information
The crystal used should be a fundamental mode (do not use third overtone), parallel resonant. Crystal capacitors
should be connected from pins X1 to ground and X2 to ground to optimize the initial accuracy. The value of these
capacitors is given by the following equation:
Crystal caps (pF) = (CL - 6) x 2
In the equation, CL is the crystal load capacitance. So, for a crystal with a 16 pF load capacitance, two 20 pF [(16-6)
x 2] capacitors should be used.
1
2
3
X 1 /ICL K
4
VDD
GND
Q4
Q3
8
7
6
5
X2
8- pi n ( 150 mi l ) S OI C
Q1
Q2
Pin
Number
Pin
Name
Pin
Type
Pin Description
1
VDD
Power
Connect to +2.5 V, +3.3 V or +5.0 V.
2
X1/ICLK
Input
Crystal or clock input (5 V tolerant input). Connect to 5 to 27 MHz input.
3
X2
Input
Connect to a fundamental mode crystal. Leave open for clock input.
4
GND
Power
Connect to ground.
5
Q1
Output
Clock Output 1.
6
Q2
Output
Clock Output 2.
7
Q3
Output
Clock Output 3.
8
Q4
Output
Clock Output 3.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS556M-04IT | 功能描述:IC CLOCK BUFFER 1:4 27MHZ 8-SOIC RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 时钟缓冲器，驱动器 系列:- 标准包装:1 系列:HiPerClockS™ 类型:扇出缓冲器（分配），多路复用器 电路数:1 比率 - 输入:输出:2:18 差分 - 输入:输出:是/无 输入:CML，LVCMOS，LVPECL，LVTTL，SSTL 输出:LVCMOS，LVTTL 频率 - 最大:250MHz 电源电压:2.375 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:- 其它名称:800-1923-6 |
| ICS557-01 | 制造商:ICS 制造商全称:ICS 功能描述:PCI-EXPRESS CLOCK SOURCE |
| ICS557-03 | 制造商:ICS 制造商全称:ICS 功能描述:PCI-EXPRESS CLOCK SOURCE |
| ICS557-05A | 制造商:ICS 制造商全称:ICS 功能描述:Quad Differential PCI-Express Clock Source |
| ICS557-06 | 制造商:ICS 制造商全称:ICS 功能描述:ONE TO FOUR HCSL CLOCK BUFFER |
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