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| 型号： | ISPPAC-CLK5304S-01TN48C |
| 厂商： | Lattice Semiconductor Corporation |
| 文件页数： | 9/56页 |
| 文件大小： | 0K |
| 描述： | IC CLOCK PROGRAM BUFFER 48TQFP |
| 标准包装： | 250 |
| 系列： | ispClock™ |
| 类型： | 时钟发生器，扇出配送，零延迟缓冲器 |
| PLL： | 带旁路 |
| 输入： | HSTL，LVCMOS，LVDS，LVPECL，LVTTL，SSTL |
| 输出： | eHSTL，HSTL，LVCMOS，LVTTL，SSTL |
| 电路数： | 1 |
| 比率 - 输入:输出： | 2:4 |
| 差分 - 输入:输出： | 是/无 |
| 频率 - 最大： | 267MHz |
| 除法器/乘法器： | 是/无 |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-TQFP（7x7） |
| 包装： | 托盘 |
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Lattice Semiconductor
ispClock5300S Family Data Sheet
17
Detailed Description
PLL Subsystem
The ispClock5300S provides an integral phase-locked-loop (PLL) which may be used to generate output clock sig-
nals at lower, higher, or the same frequency as a user-supplied input reference signal. The core functions of the
PLL are an edge-sensitive phase detector, a programmable loop lter, and a high-speed voltage-controlled oscilla-
tor (VCO). Additionally, a set of programmable feedback dividers (V[0, 1, 2]) is provided to support the synthesis of
different output frequencies.
Phase/Frequency Detector
The ispClock5300S provides an edge-sensitive phase/frequency detector (PFD), which means that the device will
function properly over a wide range of input clock reference duty cycles. It is only necessary that the input refer-
ence clock meet specied minimum HIGH and LOW times (tCLOCKHI, tCLOCKLO) for it to be properly recognized by
the PFD. The PFD’s output is of a classical charge-pump type, outputting charge packets which are then integrated
by the PLL‘s loop lter.
A lock-detection feature is also associated with the PFD. When the ispClock5300S is in a LOCKED state, the
LOCK output pin goes HIGH. The number of cycles required before asserting the LOCK signal in frequency-lock
mode can be set from 16 through 256.
When the lock condition is lost the LOCK signal will be de-asserted (Logic ‘0’) immediately.
Loop Filter: The loop lter parameters for each prole are automatically selected by the PAC-Designer software
depending on the following:
Maximum VCO operating frequency
Spread Spectrum Support: The reference clock inputs of the ispClock5300S device are spread spectrum clock
tolerant. The tolerance limits are:
Center spread ±0.125% to ±2%
Down spread -0.25% to 0.5%
30-33kHz modulation frequency
The ispClock5300S PLL has two modes of operation:
Spread Spectrum setting turned on - Spread Spectrum modulation is transferred from input to output with
minimal attenuation.
Spread Spectrum setting turned off - Spread Spectrum modulation transfer from input to output is attenu-
ated. The extent of attenuation depends on the VCO operating frequency and the feedback divider value.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISPPACCLK5304S-01TN48C | 制造商:LATTICE 制造商全称:Lattice Semiconductor 功能描述:In-System Programmable, Zero-Delay, Universal Fan-Out Buffer, Single-Ended |
| ispPAC-CLK5304S-01TN48I | 功能描述:时钟驱动器及分配 ISP 0 Delay Unv Fan- Out Buf-Sngl End I RoHS:否 制造商:Micrel 乘法/除法因子:1:4 输出类型:Differential 最大输出频率:4.2 GHz 电源电压-最大: 电源电压-最小:5 V 最大工作温度:+ 85 C 封装 / 箱体:SOIC-8 封装:Reel |
| ISPPACCLK5304S-01TN48I | 制造商:LATTICE 制造商全称:Lattice Semiconductor 功能描述:In-System Programmable, Zero-Delay, Universal Fan-Out Buffer, Single-Ended |
| ISPPACCLK5304S-01TN64C | 制造商:LATTICE 制造商全称:Lattice Semiconductor 功能描述:In-System Programmable, Zero-Delay, Universal Fan-Out Buffer, Single-Ended |
| ISPPACCLK5304S-01TN64I | 制造商:LATTICE 制造商全称:Lattice Semiconductor 功能描述:In-System Programmable, Zero-Delay, Universal Fan-Out Buffer, Single-Ended |
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