群芯微 QX814 是一款由發光二極管和光電晶體管組成的光電耦合器，采用四引腳封裝，有 DIP、DIP-M、SMD 三種形式，符合 CQC 認證、UL 認證、VDE 認證。以下是其詳細參數：
電氣特性
輸入特性：
正向電壓：在規定的正向電流下，發光二極管的正向電壓相對較低，這有助于降低輸入功耗。雖然具體數值未明確給出，但通常在 1.2V 到 1.4V 左右。
正向電流：一般為 5mA 到 10mA，較小的輸入電流即可使光耦正常工作，便于與各種低功耗的控制電路相連接。
輸出特性：
集電極 - 發射極擊穿電壓：≥80V，較高的擊穿電壓使得輸出端能夠承受一定的電壓沖擊，提高了光耦的穩定性和可靠性。
電流傳輸比：CTR 范圍≥20%（=±1mA，=5V），電流傳輸比是光耦的重要參數，它表示輸入電流與輸出電流之間的比例關系，該數值確保了輸入信號與輸出信號之間的有效耦合和準確轉換。
Forward voltage: In the specified forward current, the forward voltage of the LED is relatively low, which helps to reduce the input power consumption. Although the exact number is not explicitly given, it is usually around 1.2V to 1.4V.
Forward current: generally 5mA to 10mA, small input current can make the optocoupler work normally, easy to connect with a variety of low-power control circuits.
Output characteristics:
Collector-emitter breakdown voltage: ≥80V, the higher breakdown voltage makes the output side can withstand a certain voltage impact, improve the stability and reliability of the optocoupler.
Current transmission ratio: CTR range ≥20% (=±1mA, =5V), the current transmission ratio is an important parameter of optocoupler, it represents the proportional relationship between the input current and the output current, the value ensures the effective coupling and accurate conversion between the input signal and the output signal.

光學特性
發光波長：內部采用 GaAs 紅外發光二極管作為發光源，其發光波長一般在 940nm 左右，該波長的光具有較高的發光效率和較好的光電轉換性能，能夠有效地實現光信號的傳輸和耦合。
響應時間：雖未明確具體數值，但在實際應用中，其響應時間較短，能夠快速地對輸入信號進行響應，確保信號的快速傳輸和處理。
Luminous wavelength: the internal use of GaAs infrared light-emitting diode as a light source, its luminous wavelength is generally about 940nm, the wavelength of light has a high luminous efficiency and better photoelectric conversion performance, can effectively achieve the transmission and coupling of optical signals.
Response time: Although the specific value is not clear, in practical applications, its response time is short, and it can quickly respond to the input signal to ensure the rapid transmission and processing of the signal.

隔離特性
輸入 - 輸出隔離電壓：=5000V rms，高隔離電壓有效地實現了輸入電路與輸出電路之間的電氣隔離，能夠防止不同電路之間的電氣干擾，提高了系統的安全性和可靠性。
絕緣電阻：輸入級與輸出級之間的絕緣電阻較高，通常在Ω 以上，這進一步增強了輸入輸出之間的隔離效果，減少了漏電流的影響。
工作溫度范圍
能夠在 - 55℃至 110℃的寬溫度范圍內穩定工作，在不同的環境溫度下，其電氣特性和光學特性的變化較小，具有良好的溫度穩定性，可滿足各種工業、汽車電子、家電等領域的應用需求。
封裝特性
封裝形式：采用四引腳封裝，有 DIP（雙列直插式封裝）、DIP-M（改進型雙列直插式封裝）、SMD（表面貼裝封裝）三種形式，用戶可以根據實際應用需求選擇合適的封裝形式。
封裝尺寸：不同封裝形式的尺寸略有不同，但總體上具有體積小、引腳間距小等特點，便于安裝和焊接，適用于高密度電路板的設計和應用。
認證信息
CQC 認證：編號為 CQC19001227486，符合 GB 4943.1-2011/GB 8898-2011 標準。
UL 認證：編號為 20191028-E509768，符合 UL1577 標準。
VDE 認證：編號為 40051490，符合 DIN EN60747-5-5（VDE0884-5）/DIN EN62368-1（VDE0868-1）標準。
Input-output isolation voltage: =5000V rms, the high isolation voltage effectively realizes the electrical isolation between the input circuit and the output circuit, can prevent electrical interference between different circuits, and improve the safety and reliability of the system.
Insulation resistance: The insulation resistance between the input stage and the output stage is high, usually above Ω, which further enhances the isolation effect between the input and output and reduces the influence of leakage current.
Operating temperature range
It can work stably in a wide temperature range of -55 ° C to 110 ° C, and has small changes in its electrical and optical characteristics under different ambient temperatures, and has good temperature stability, which can meet the application needs of various industries, automotive electronics, home appliances and other fields.
Package characteristics
Package form: Four-pin package, DIP (double in-line package), DIP-M (improved double in-line package), SMD (surface mount package) three forms, users can choose the appropriate package form according to the actual application needs.
Package size: The size of different package forms is slightly different, but it has the characteristics of small volume, small pin spacing, etc., which is easy to install and weld, and is suitable for the design and application of high-density circuit boards.
Authentication information
CQC certification: the number is CQC19001227486, in line with GB 4943.1-2011/GB 8898-2011 standard.
UL Certification: No. 20191028-E509768 complies with UL1577 standard.
VDE Certification: No. 40051490 according to DIN EN60747-5-5 (VDE0884-5) /DIN EN62368-1 (VDE0868-1).

審核編輯 黃宇