By LEIDITECH | 03 July 2024 | 0 Comments
The fragile nerves guarding the electronic world：Revealing the Art of Static and Surge Protection fo
The electrostatic and surge protection of data interfaces is an indispensable part of modern electronic system design，Its importance lies in protecting sensitive electronic devices from damage caused by external environmental factors。electrostatic discharge （ESD）And surges are two common threats，They can instantly generate high voltage or high current，Potential damage to the circuit。
ESDUsually occurs when the human body or other objects approach or come into contact with electronic devices，And surges may be caused by lightning strikes、Caused by power system faults or other electromagnetic interference events。These transient events may cause physical damage to the data interface，Data loss，Or the system may be unstable，Thereby affecting the normal operation of the equipment。Especially in the data center、industrial control 、In applications such as communication networks that require extremely high reliability，An unexpected incidentESDOr surge events may cause service interruptions，Causing huge economic losses。
therefore，By using appropriate protective components such asESDdiode、TVS二极管、Gas discharge tube（GDT）、Varistors, etc，Establish a multi-level protection mechanism，Can effectively absorb or divert these transient energies，Ensure the security of these critical data interfaces and the continuous operation of the system。
Lei Mao provides various solutions for different protection needs of different data interfaces。
eSATA（ExternalSerial ATA）Interface is a type of interface based onSerial ATA（SATA）Standard external interface technology，Designed specifically for connecting external storage devices。It provides a high speed、A reliable way，Enable users to easily access external devices like connecting an internal hard driveSATAHard drive、SSDOr storage devices such as optical drives，Without opening the computer case。
eSATAThe interface is integrated with the internalSATASame signal and data transmission protocol，Eliminated traditionUSBorFirewirePossible performance bottlenecks brought by interfaces，So as to fully utilize the maximum read and write speed of storage devices。
12.1 eSATA Static protection scheme
Advantages of the plan：eSATAProvide 6000Mbit/sTransmission speed of，Lei Mao adopts integrated device protection,Parasitic capacitance<1pf，Ensure signal integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 8kV，Air discharge 15kV
12.2 eSATA Electrostatic protection scheme 2
Advantages of the plan：eSATAavailableLC05CDorULC0502M3Q，Lei Mao adopts ultra-low capacitance integrated devices for protection, Parasitic capacitance<1pf，While ensuring signal integrity，adoptElectrostatic testing。satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV。
T1 andE1 belongs to the quasi synchronous digital series（PDH）。T1 interface provided 1.544 MbpsTotal bandwidth of，Divided into 24 time slots，Each time slot can carry one 64 KbpsChannel，Commonly used for telephone and data transmission。andE1. The interface follows European standards，Bandwidth of 2.048 Mbps，Includes 32 time slots，Similarly, each time slot is typically 64 Kbps，Suitable for a wider range of international applications，Especially in China, this standard has also been adopted。Both are based on time-division multiplexing technology，Ensure efficient utilization of bandwidth resources，Widely used for enterprise network connectivity、ISPAccess、Remote access and transmission of multiple communication protocols。
13.1 T1 E1 Interface electrostatic surge protection scheme
Advantages of the plan：Lei Mao adopts integrated device protection,Save space，Provide front-end protection for surge devices。Ensure signal integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 8kV，Air discharge 15kV。
I/Ointerface，Input/Output interface，It is a crucial component in computer systems，It serves as the central processing unit（CPU）Bridge between external devices，Implemented bidirectional transmission of data and control signals。These interfaces allow computers to interact with the external world，Whether receiving input commands from the keyboard、Send image data to the monitor，Or with the hard drive、network equipment 、Data exchange with printers, etc。
14.1 ordinaryIOStatic protection scheme
Advantages of the plan：Lei Mao uses ordinary low capacitance integrated devices to prevent static electricity，satisfyIEC61000-4-2，Level 4，Contact discharge 8kV，Air discharge 15kV。 Single channel 0402 packaging device optional。
MCUSerial port，NamelyMicrocontroller（Micro controller Unit）Serial communication interface in，It is a technology that enables efficient data exchange between microcontrollers and external devices。By serial mode，Namely, sequentially transmitting data bit by bit，MCUSerial port can convert data from external devices into signals that can be recognized by microcontrollers，Enable microcontrollers to control these devices；meanwhile，It also converts the instructions issued by the microcontroller into a form that external devices can understand，To execute control functions。
14.2 MCUSerial portUARTDiscrete electrostatic protection scheme
Advantages of the plan：CommonUARTProvide 115200MbpsTransmission speed of，Lei Mao adopts discrete device protection, Convenient design and placement，Ensure signal integrity。ESDA33CP30，SMDA05CCN，ULC0542CsatisfyIEC61000-4-2，Level 4。
14.3 MCUSerial portUARTIntegrated electrostatic protection scheme
Advantages of the plan：UARTProvide 11520MbpsTransmission speed of，Lei Mao adopts single device protection,Save space， Ensure signal integrity，ULC3304P10, ULC0524P Between the 1st and 6th legs of the,Between feet 2 and 9,There is connectivity between the 4 and 7 legs，convenientPCBwiring，satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV，Ensure various electrical interferences for industrial customers。
KeyboardKeys are input devices that make up computers or other electronic devices——The basic unit of a keyboard，Users send instructions or input information to the device by pressing these physical buttons
15.1 KeyboardElectrostatic protection scheme for discrete button components
Advantages of the plan：Lei Mao uses ordinary low capacitance discrete devices to prevent static electricity，satisfyIEC61000-4-2，Level 4， Contact discharge 8kV，Air discharge 15kV。
15.2 KeyboardStatic protection scheme for button integrated devices
Advantages of the plan：Lei Mao uses ordinary low capacitance integrated devices to prevent static electricity，satisfyIEC61000-4-2，Level 4， Contact discharge 8kV，Air discharge 15kV。
CAN，Full nameControllerArea Network，Controller Local Area Network，It is an internationally standardized serial communication protocol，Widely used in automotive electronics、industrial automation 、vessel、Medical equipment and other fields。CANBus system design for achieving high efficiency in distributed control systems、Reliable data transmission，Equipped with multi master control、Error detection and recovery、Characteristics such as fault closure，Support high-speed communication between nodes，Simultaneously maintaining system flexibility and scalability。
16.1 CANStatic protection scheme
Advantages of the plan：Lei Mao adopts integrated device protection，capacitance<50PF，While ensuring signal integrity，Through electrostatic measurement try。satisfy：satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV。SMC24 Through automotive gradeAEC-Q101 Certification。
16.3 CANElectrostatic filtering protection scheme
Advantages of the plan：Lei Mao adopts multiple integrated devices for protection，capacitance<50PF，While ensuring signal integrity，Can filter out noise、Through electrostatic testing。
satisfy：IEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV。 SMC24 Through automotive gradeAEC-Q101 Certification。
16.4 CANInterface electrostatic surge protection scheme
Advantages of the plan：ForCANSurge protection of interfaces，Lei Mao adopts low residual voltageTSS，Effectively protecting interfaces，TSSReaction time Betweennslevel，Capable of preventing surges，It can also prevent static electricity，And ensure signal integrity.
satisfy: IEC61000-4-2，Static level 4，Contact discharge 15kV，Air discharge 8kV； IEC61000-4-5 wave Surging 10/700μs，6KV。
microphone，Also known as a microphone or microphone，It is an energy conversion device that converts sound signals into electrical signals，Widely used in communication、tape、broadcast、show、Multiple fields such as conferences。
17.1. Microphone static protection scheme
Advantages of the plan：Lei Mao adopts integrated device protection，Capacitor 0.22PF，While ensuring signal integrity，Through electrostatic testing。 satisfy：IEC61000-4-2，Contact discharge 30kV，Air discharge 30kV。
RS485andRS422The interfaces all belong to the serial communication standard，Mainly used for long-distance data transmission between devices，Specially suitable for complex wiring and noise suppression requirements in industrial and commercial environments。
RS485 interface is a half duplex communication protocol，It adoptsDifferential signaltransmission，Allow multiple devices to be connected on one bus（Theoretically, up to 256），And it can reach up to 10 at a distance of up to 1200 metersMbpsTransmission speed of data。RS485 due to its low cost、High reliability and good noise resistance performance，In industrial automation、Building automation、Widely used in remote monitoring systems。
by comparison，RS422 interface provides full duplex communication capability，Also using differential signals，But usually four lines are needed（Two transmissions，Two receiving lines），This allows it to send and receive data simultaneously at the same time。RSThe transmission distance and data rate of 422 are related toRS485 similarity，But due to its full duplex feature，RS422 is more suitable in application scenarios that require bidirectional simultaneous communication，For example, in professional audio equipment and high-speed data acquisition systems。
18.2 RS485 Surge protection scheme
Advantages of the plan：Lei Mao adopts two-level protection，First level adoptionGDTAnti surge，Second levelESDDiode anti-static。Anti static complianceIEC 61000-4-2 (ESD)±30kV（air）and±30kV（contact）standard。Surge protection level：8/20us 5KA。
18.4 RS485 Surge filtering protection scheme
Advantages of the plan：Lei Mao adopts multiple integrated devices for protection，While ensuring signal integrity，Can filter out noise，Through electrostatic testing。satisfy：satisfyIEC61000-4-2，ISO10605-2 Level 4，Contact discharge 30kV，Air discharge 30kV。
18.5 RS422RS485 electrostatic surge protection scheme
Advantages of the plan：ForRS422RSSurge protection for 485 interface，Lei Mao adopts low residual voltageTSS，effective protection RS422 RS485chip，TSSThe reaction time isnslevel，Capable of preventing surges，It can also prevent static electricity，And ensure signal integrity.satisfyIEC61000-4-2，Static level 4，Contact discharge 15kV，Air discharge 8kV；IEC61000-4-5 wave Surging 10/700μs，6KV。
19.2 RS422 data cable with power supply static electricity Surge protection scheme
Advantages of the plan：Lei Mao adopts integrated device protection，While ensuring signal integrity，Through electrostatic testing。satisfy：satisfyIEC61000-4-2，ISO10605-2 Level 4，Contact discharge 30kV，Air discharge 30kV
RS232Interface is a classic serial communication standard，Originally created by the Electronic Industry Association of America（EIA）formulate，The full name isEIA-RS-232。It is mainly used to achieve data transmission between computers and external devices，Like a printer、Modemetc.。
20.1 RS232 interface integrated electrostatic protection scheme
Advantages of the plan：Lei Mao adopts integrated device protection，While ensuring signal integrity，Through electrostatic testing。satisfy：IEC61000-4-2，ISO10605-2 Level 4，Contact discharge 30kV，Air discharge 30kV
20.2 RS232 Interface integrated surge electrostatic protection scheme
Advantages of the plan：Lei Mao adopts two-level protection，First level adoptionGDTAnti surge，Second levelESDDiode anti-static。Anti static complianceIEC 61000-4-2 (ESD)±30kV（air）and±30kV（contact）standard。Surge protection level：8/20us 5KA。
20.4 RS232 data line with power supply electrostatic surge protection scheme
Advantages of the plan：Lei Mao adopts integrated device protection，While ensuring signal integrity，Through electrostatic testing。satisfy：satisfyIEC61000-4-2，ISO10605-2 Level 4，Contact discharge 30kV，Air discharge 30kV。
20.5 RS232 Interface discrete electrostatic protection scheme
RS-232standard interface ，Also known asEIA RS-232，It is one of the commonly used serial communication interface standards，Usually used for point-to-point communication over short distances。This interface serves as a debugging interface on communication devices、Inter board communication interface and monitoring signal interface，The maximum speed is 115,200 baud rate。
Advantages of the plan：Lei Mao adopts discrete device protection，While ensuring signal integrity，Through electrostatic testing。satisfy：satisfyIEC61000-4-2，ISO10605-2 Level 4，Contact discharge 30kV，Air discharge 30kV
20.6 RS232 Interface discrete surge electrostatic protection scheme
Advantages of the plan：Lei Mao adopts two-level protection，First level adoptionGDTAnti surge，Second levelESDDiode anti-static adopts discrete devices。Anti static complianceIEC 61000-4-2 (ESD)±30kV（air）and±30kV（contact）standard。Surge protection level：8/20us 5KA。
Lei Mao has a detailed plan and wiring diagram，And recommended model parameters。Please contact Lei MaoEMCLittle brother requests it。
Lei Mao mainly provides anti-static measuresTVS/ESDAnd relatedEMCcomponent（Discharge tubeTSS/GDT、Stabilizing tubeZENER、VaristorMOV、Rectifier diodeRECTIFIER、Self recovery fusePPTC、Field-effect transistorMOSFET、inductance）。
Surrounded by Lei MaoEMCEMC service customers，Self built free laboratory for testing static electricity for customersESD（30KV）、Group pulseEFT(4KV)、surge（8/20，10/700 10/1000）、Car load shedding（7637 5a/5b）Performance testing of components, etc。LeiditechKeeping up with the pulse of domestic and international technological updates，Continuously innovatingEMCProtection scheme and related devices，Target direction is small packaging，High power，Provide reliable solutions and components for domestic substitution。
The fragile nerves guarding the electronic world：Revealing the Art of Static and Surge Protection fo
Lei Mao's one-stop solution to electrostatic surge and interface safety in electronic equipment
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