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参数资料
| 型号： | MAX3624AETJ+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 312.5 MHz, OTHER CLOCK GENERATOR, QCC32 |
| 封装： | 5 X 5 MM, ROHS COMPLIANT, TQFN-32 |
| 文件页数： | 12/12页 |
| 文件大小： | 391K |
| 代理商： | MAX3624AETJ+ |
MAX3624A
Low-Jitter, Precision Clock Generator
with Four Outputs
_______________________________________________________________________________________
9
Table 4. Crystal Selection Parameters
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Crystal Oscillation Frequency
fOSC
19.375
27
MHz
Shunt Capacitance
CO
2.0
7.0
pF
Load Capacitance
CL
18
pF
Equivalent Series Resistance (ESR)
RS
50
Maximum Crystal Drive Level
300
μW
PLL Divider Configuration
Table 3 shows the input settings required to set PLL
feedback divider.
Crystal Selection
The crystal oscillator is designed to drive a fundamen-
tal mode, AT-cut crystal resonator. See Table 4 for rec-
ommended crystal specifications. See Figure 4 for
external capacitance connection.
Crystal Input Layout and Frequency
Stability
The crystal, trace, and two external capacitors should
be placed on the board as close as possible to the
MAX3624A’s X_IN and X_OUT pins to reduce crosstalk
of active signals into the oscillator.
The layout shown in Figure 3 gives approximately 3pF
of trace plus footprint capacitors per side of the crystal
(Y1). The dielectric material is FR4 and dielectric thick-
ness of the reference board is 15 mils. Using a 25MHz
crystal and the capacitor values of C22 = 27pF and
C23 = 33pF, the measured output frequency accuracy
is -14ppm at +25°C ambient temperature.
Table 3. PLL Divider Configuration Chart
INPUT
FB_SEL1
FB_SEL0
M DIVIDER
0
÷25
0
1
÷24
1
0
÷32
1
÷16
Figure 3. Crystal Layout
X_IN
X_OUT
27pF
CRYSTAL
(CL = 18pF)
33pF
Figure 4. Crystal, Capacitors Connection
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3624AETJ+ | 功能描述:时钟发生器及支持产品 Low Jitter Precision w/Four Outputs RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
| MAX3624AETJ+T | 功能描述:时钟发生器及支持产品 Low Jitter Precision w/Four Outputs RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
| MAX3624AEVKIT+ | 制造商:Microsemi Corporation 功能描述:MAX3624A EVALUATION KIT - Boxed Product (Development Kits) 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:KIT EVALUATION MAX MAX3624A 制造商:Microsemi Corporation 功能描述:KIT EVALUATION MAX MAX3624A |
| MAX3624EVKIT+ | 制造商:Microsemi Corporation 功能描述:MAX3624 EVALUATION KIT - Boxed Product (Development Kits) 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:KIT EVALUATION MAX MAX3624 制造商:Microsemi Corporation 功能描述:KIT EVALUATION MAX MAX3624 |
| MAX3624UTJ+ | 功能描述:时钟发生器及支持产品 RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
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