85°C ± 2°C, 85%±5%RH, 1000 hours; 1.5 hr ON, 0.5 hr OFF cycle
85°C ± 2°C, 3000 hours, 1.5 hr ON, 0.5 hr OFF cycle
+155°C, 1000 hours
* Depends on resistance value, please contact KOA Speer for details.
Precautions for Use
• The properly and electrostatically measured taping materials are used for the components, but attention should be paid to the fact that there is some danger the parts
absorb on the top tapes to cause a failure in the mounting and the parts are destructed by static electricity (1J, 2A, 2B, 2E: 1kV and more, 1E: 0.5kV and more at Human
Body Model 100pF, 1.5kΩ) to change the resistance in the conditions of an excessive dryness or after the parts are given vibration for a long time as they are packaged
on the tapes. Similarly, care should be given not to apply the excessive static electricity when mounting on the boards.
• Ionic impurities such as flux etc. that are attached to these products or those mounted onto a PCB, negatively affect their moisture resistance, corrosion resistance, etc.
The flux may contain ionic substances like chlorine, acid, etc. while perspiration and saliva include ionic impurities like sodium (Na＋), chlorine (Cl−) etc. Therefore these
kinds of ionic substances may induce electrical corrosion when they invade into the products. Either thorough washing or using RMA solder and flux are necessary since
lead free solder contains ionic substances. Washing process is needed, before putting on moisture proof material in order to prevent electrical corrosion.
• Please pay attention that the top of an iron does not direct touch to the components. There is a risk that may cause a change in resistance. Take care that another risk
may happen that the protecting coat is carbonized in an instant when touched directly by the top of the iron, also climatic-proof for electric corrosion or insulation of
protecting coat may be dropped down. Be sure not to give high temperature on the top of the iron as it will degrade the protecting coat.
• Avoid storing components under direct sun rays, high temperature/humidity. Direct sun rays will cause quality change of taping and difficulty of keeping appropriate peeling
strength. 5~35°C/35~75%RH, there is no deterioration of solderability for 12 months, but take special care for storing, because condensation, dust, and toxic gas like
hydrogen sulfide, sulfurous acid gas, hydrogen chloride, etc. may drop solderability.
●
The upper electrodes could be peeled off when a heat-resistant masking tape is attached to the mounted chip resistors and then detached from them. It is confirmed that
the adhesiveness gets stronger due to the exposure to heat under mounting. Accordingly, we recommend the use of masking tape be refrained. If the use of heat-resistant
masking tape is unavoidable, please make sure that the adhesives on the tape do not directly come in contact with the product.
For Surface Temperature Rise Graph see Environmental Applications. Additional environmental applications can also be found at www.koaspeer.com
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
11/06/17
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
41
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
MCLR/Vpp是ICD2编程电压引脚，编程时电压应该在13 V左右，这个引脚的另一个功能是复位。我们知道，任何单片机在上电或在其他一些特殊情况下都能引起复位。单片机的复位与电源和晶体振荡是单片机进入正常工作的三大必要条件。因此，应该注意以下问题。 ① 不能接入大电容，否则Vdd（电源电压）不能快速建立，影响复位。 字串5 ② 目标板的Vdd（电源电压）与MCLR/Vpp间应串接一...[详细]
电容C1和电阻R1并联使用，是一个典型的电容降压电路，交流电经过降压、VD1～VD4整流、滤波后，提供给三极管VT、光敏电阻RG、电阻R2、电阻R3组成的电压控制电路。当夜幕降临光线过低时，RG阻值增大，VT基极的电位下降，使VT关断。供给LED光源组的电压升高，HW点亮。反之光线比较亮时，RG阻值减小，基极的电压处于高电位，VT导通，LED不发光。鱼塘 LED 捕蛾灯电路图: ...[详细]
WindowsCE
