The MX55/MX57 product line is an ultra-low jitter family
of industry standard crystal oscillators (XO) designed to
maximize performance in networking, storage, server,
and telecommunications equipment.
The MX55 employs a space-saving 3.2 mm x 5 mm
package, while the MX57 is in a 5 mm x 7 mm package.
These devices meet ±50 ppm total stability across
–40°C to +85°C operating temperature range, using
proven high reliability assembly methods that improve
long term reliability and minimize aging drift compared
to traditional XO assembly processes.
With programmable output format and OE options,
these XOs can be configured to be footprint compatible
with any standard 6-pin XO available today. Standard
options and frequencies are also available.
Please visit
http://clockworks.microchip.com/timing
to
select a combination of options to customize your
product, print a specific data sheet, and order samples.
Applications
•
•
•
•
•
10/40/100G Ethernet
Optical Communications
PCIe Gen 1/2/3/4
Fibre Channel/SAS
CPRI/OBSAI, XAUI and Backplane SERDES
Block Diagram
VDD Pin 6
GND Pin 3
VDD Noise Filter
OE Pin 1 or Pin 2
Fixed
Freq. XO
Phase Locked
Loop
Q Pin 4
Q Pin 5
2018 Microchip Technology Inc.
DS20005972A-page 1
MX55/57
Package Types
MX55 Pinout Enable
Pin 1 Option
MX57 Pinout Enable
Pin 2 Option
OE
1
6 VDD
5 Q
DNC 1
OE
2
6 VDD
5 Q
DNC 2
GND 3
-
-
4 Q
GND 3
4 Q
DS20005972A-page 2
2018 Microchip Technology Inc.
MX55/57
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Input Voltage, (V
IN
) ............................................................................................................................–0.3V to V
DD
+0.3V
Supply Voltage ......................................................................................................................................... –0.3V to + 4.0V
while (DEF_TRUE) { /* Task body, always written as an infinite loop. */ //BSP_LED_Toggle(0); OSTimeDlyHMSM(0, 0, 0, 500); GPIO_SetBits(GPIOE,GPIO_P ......
C++ 属于面向对象的编程语言，OOP的思想不必多说，特别对于复杂的软件工程来说，利用OOP绝对是事半功倍，相对于传统的C来说； 当然用C来写单片机程序无可厚非，已经延续了一个传统，从大学时学的开始到工作岗位，好多人都是一直用C来做，但是既然Keil支持C++编译， 可以用C++来编写你的代码，可以利用高级语言来结构化，清晰化你的程序，为嘛不用呢！哈哈，个人看法！下面进入正题： C+...[详细]
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