within 5°C of the specified classification temperature (T
C
)
Ramp-down rate (T
p
to T
smax
)
Time 25°C to peak temperature
Reflow cycles
*Tolerance
for peak profile temperature (T
P
) is defined as a supplier minimum and a user maximum.
Sn-Pb Eutectic
Assembly
100°C
150°C
60 - 120 sec.
3°C/sec. max
183°C
60 - 150 sec.
see Table 1
20 sec.
6°C/sec. max
6 min. max
2 max
Pb-Free
Assembly
150°C
200°C
60 - 120 sec.
3°C/sec. max
217°C
60 - 150 sec.
see Table 2
30 sec.
6°C/sec. max
8 min. max
2 max
**Tolerance
for time at peak profile temperature (t
p
) is defined as supplier minimum and a user maximum.
ATTENTION:
Abracon LLC’s products are COTS – Commercial-Off-The-Shelf products; suitable for Commercial, Industrial and, where designated, Automotive Applications. Abracon’s products
are not specifically designed for Military, Aviation, Aerospace, Life-dependent Medical applications or any application requiring high reliability where component failure could result in loss of life
and/or property. For applications requiring high reliability and/or presenting an extreme operating environment, written consent and authorization from Abracon LLC is required. Please contact
Real-time clock program, through 89C52, let 1602 LCD display real-time clock, use key1 (function key) to set date and time, key2 is pressed once to add 1 to time or date, key3 is pressed once to subtr...
[i=s]This post was last edited by w562601331 on 2017-3-4 14:47[/i] [font=宋体]I have recently studied sensortile's standard routines and would like to share and explain some of its basic functions. Firs...
CCS is an open software platform that can support different hardware interfaces. Therefore, different hardware interfaces must be connected to CCS through standard drivers.
What is the role of Link's ...
I added a dialog box to the resource, and displayed it in the function dlg.DoModal(). Why is there a keyboard icon in the bottom row? And when I click it on the screen, the entire keyboard keys will a...
Today's computer peripherals are pursuing high speed and high versatility. In order to meet user needs, seven companies led by Intel launched the USB (Universal Serial Bus) bus protocol in 1994, wh...[Details]
All electronic design engineers and scientists have performed electrical signal analysis, or signal analysis for short. Through this basic measurement, they can gain insight into signal details and...[Details]
In this article, the high-performance DSP developed by TI can be used as an effective confidentiality method if it is applied to PC encryption cards.
As an effective network security solution,...[Details]
Introduction
Power subsystems are becoming more and more integrated into the overall system. Power systems have moved from being separate "essential dangerous devices" to being monitorable...[Details]
The solidification and modularization of intelligent video analysis algorithms are the current trends in the application of intelligent video analysis technology. It perfectly combines intelligent ...[Details]
1. Introduction
At present, most lighting equipment still uses traditional energy for lighting. Making full use of solar energy as the energy supply for lighting equipment is of great si...[Details]
1. What is temperature?
Heat is a type of molecular motion. The hotter an object is, the faster its molecules move. Absolute zero is defined as the temperature at which all molecular motion ...[Details]
Contact resistance
is the resistance to current flow through a closed pair of contacts. This type of measurement is performed on devices such as connectors,
relays
, and switches. The...[Details]
Overview:
This paper introduces a method of connecting a CAN-bus network with Ethernet to form a medium-sized remote monitoring/data transmission network.
CAN (Controller Area Network) is ...[Details]
1 Introduction to HART Protocol
HART (Highway Addressable Remote Transducer), an open communication protocol for addressable remote sensor high-speed channels, was launched by Rosemen in the U...[Details]
With the rapid development of intelligent control technology, computers and information technology, the trend of information appliances IA (Information Application), computers and communications integ...[Details]
Many battery-powered systems require a visual indicator to show when the battery needs to be replaced. LEDs are commonly used for this purpose, but they consume at least 10mA of current. This con...[Details]
introduction
MEMS is a high-tech that has flourished on the basis of integrated circuit production technology and dedicated micro-electromechanical processing methods. Pressure sensors develop...[Details]
1. Disadvantages of choosing too high a voltage level
Choosing too high a voltage level will result in too high an investment and a long payback period. As the voltage level increases, the...[Details]
At present, a large number of cooling tower fans, speed fans and special fans are in use in petroleum, chemical, pharmaceutical, metallurgical and other enterprises. Some fans have no monitoring in...[Details]