SP485EEN-L/TR - 10Mbps Low-EMI RS-485 Transceiver | MaxLinear
料号： SP485EEN-L/TR ✓ 量产中SP485EEN-L/TR 概述
An RS-485 transceiver is an interface IC that combines a differential line driver and differential receiver so that digital logic can communicate over a balanced, multipoint cable. It belongs to the hierarchy of serial-interface transceivers, physical-layer interface ICs, interface ICs, and semiconductors. Unlike a single-ended communication standard, RS-485 uses differential signaling and commonly pairs with termination resistors, biasing networks, galvanic-isolation components, and protected connector interfaces.
The SP485EEN-L/TR provides a maximum signaling rate of 10 Mbps, making it suitable for factory automation, industrial controllers, instrumentation, and other equipment that requires faster balanced-bus communication than conventional low-speed RS-485 links. Its half-duplex architecture uses one shared differential bus pair for transmission and reception. The listed electrical range of 4.75 V to 5.25 V supports a conventional 5 V supply environment.
MaxLinear describes the SP485 family as a BiCMOS design that supports low-power operation without sacrificing performance. The SP485EEN-L/TR is also identified as pin-to-pin compatible with the earlier SP481 and SP485 devices and with widely used industry-standard transceivers. This compatibility is important when an existing PCB footprint must be retained, although the designer must still verify supply voltage, driver current, receiver thresholds, shutdown behavior, and bus-direction-control requirements.
Typical applications include industrial sensor networks, programmable-logic-controller communication links, motor-control equipment, building-automation controllers, test and measurement systems, and external data-acquisition modules. In a multidrop bus, the device can interface a host UART to a terminated and biased RS-485 network. In a point-to-point link, two devices can communicate over a longer balanced cable, subject to the transceiver and connector requirements established in the system design.
The principal design consideration is preserving signal integrity and transient immunity. Place the transceiver close to the connector, provide a continuous ground reference, use appropriate termination and fail-safe biasing, and route the differential pair together with consistent geometry. Adequate supply decoupling is also required, while external protection may still be necessary for exposed cables or severe industrial environments.
This product record combines verified distributor pricing, manufacturer family information, pin-compatible cross references, package details, and practical integration guidance. It also distinguishes confirmed drop-in candidates from alternatives whose detailed electrical limits still require comparison against the manufacturer datasheet.
直接替换替代料： SP485EEN-L/TR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SP485EEN-L/TR （相同外形与封装尺寸） ——差异在于 Data Rate, Package, Supply Voltage, RoHS Status, Duplex.
SP485CN-L/TR
✅ 直接替换📋 参考替代料（不在目录中）
SP485EEN-L
✅ 直接替换联系询价
查看数据手册 →SP485EN-L
✅ 直接替换联系询价
查看数据手册 →MAX485CSA-T
✅ 直接替换📋 参考替代料（不在目录中）
MAX485ESA+
✅ 直接替换联系询价
查看数据手册 →SP485EEN-L/TR 规格参数
| Product Type | Half-duplex RS-422/RS-485 transceiver |
| Transmitter and Receiver Count | 1 transmitter and 1 receiver |
| Maximum Data Rate | 10 Mbps |
| Supply Voltage Range | 4.75 V to 5.25 V |
| 封装 | 8-pin SOIC |
| 安装类型 | Surface mount |
| 工作温度范围 | -40 °C to +85 °C |
| ESD Tolerance, Human Body Model | Over ±15 kV |
| ESD Tolerance, Air Discharge | Over ±15 kV per IEC 61000-4-2 |
| Bus Compatibility | RS-422 and RS-485 |
| Duplex Mode | Half-duplex |
| Process Architecture | BiCMOS |
SP485EEN-L/TR 8-pin soic 引脚配置指南
SP485EEN-L/TR（8-pin soic 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： SP485EEN-L/TR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SP485EEN-L/TR 适用于 6 应用s: Industrial Automation Fieldbus Interfaces, PLC and Sensor Network Communications, Motor Control and Machinery Interfaces, Building Automation and HVAC Equipment, Test and Measurement Data Acquisition, Secure Remote and Communications Equipment.
Industrial Automation Fieldbus Interfaces
The SP485EEN-L/TR fits industrial controller and fieldbus interface boards that require a compact 5 V RS-485 physical layer. Its 10 Mbps maximum data rate supports higher-speed equipment links, while the -40 °C to +85 °C operating range covers factory environments. The single half-duplex driver and receiver reduce board area compared with separate line-driver and receiver ICs. Designers should still provide termination, fail-safe biasing, a controlled ground reference, and connector-side surge protection.
推荐
PLC and Sensor Network Communications
The SP485EEN-L/TR is suitable for connecting a controller UART to industrial sensors distributed across a balanced cable. Its one-driver, one-receiver half-duplex arrangement allows shared-bus operation, and the 4.75 V to 5.25 V supply range aligns with conventional 5 V logic. At 10 Mbps, the device can address faster local sensing networks, although cable length and topology determine the practical usable rate. Robust grounding and balanced routing are essential for dependable field-bus communication.
推荐
Motor Control and Machinery Interfaces
The SP485EEN-L/TR can connect motor controllers, servo amplifiers, remote I/O modules, and machinery diagnostic equipment over a short balanced industrial link. Its 10 Mbps capability provides substantial signaling headroom for local control traffic, while enhanced ESD protection above ±15 kV in the documented Exar family helps manage electrostatic events at accessible equipment interfaces. External surge protection may still be required at long cable entries. The 8-pin SOIC package also simplifies compact control-board layouts.
推荐
Building Automation and HVAC Equipment
The SP485EEN-L/TR supports low-cost RS-485 connectivity in building controllers, HVAC equipment, room controllers, and access-control panels. The compact 8-pin SOIC footprint preserves board area, and its 5 V operating range is convenient for systems powered from regulated industrial rails. A -40 °C to +85 °C operating range supports equipment installed in controlled plant rooms and industrial enclosures. Designers should use isolated bus transceivers when ground potential differences or long building cable runs could exceed the application requirements.
推荐
Test and Measurement Data Acquisition
The SP485EEN-L/TR is appropriate for remote instrumentation, laboratory data loggers, and automated test equipment that must collect measurements across a multi-drop bus. Its 10 Mbps maximum rate supports high-throughput local data transfers, and the half-duplex topology limits wiring to one balanced pair. The compact SOIC package leaves room for dense analog and digital circuitry. Engineers should account for bus reflections, input impedance, synchronization, and isolation when connecting high-impedance sensors or long instrument cables.
推荐
Secure Remote and Communications Equipment
The SP485EEN-L/TR can provide the physical layer between a communications processor and a remote RS-485 link used in access terminals, security equipment, or network-management modules. Its one-transmitter, one-receiver BiCMOS design supports half-duplex traffic in a small 8-pin SOIC footprint, and its documented 10 Mbps rate supports fast local links. The enhanced ESD performance is useful near exposed equipment interfaces, but it does not replace surge arrestors for severe installations or an isolation barrier for large ground-potential differences.
推荐
推荐产品汇总
工程参考数据： SP485EEN-L/TR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | SP485CN-L/TR | SP485EEN-L | SP485EN-L | MAX485CSA-T | MAX485ESA+ |
|---|---|---|---|---|---|---|
| Package | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Brand | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | MaxLinear, Inc. | Maxim Integrated | Analog Devices |
| Transceiver Configuration | 1 transmitter and 1 receiver | 1 transmitter and 1 receiver | 1 transmitter and 1 receiver | 1 transmitter and 1 receiver | RS-485 transceiver | 1 transmitter and 1 receiver |
| Bus Standard | RS-422/RS-485 | RS-422/RS-485 | RS-422/RS-485 | RS-422/RS-485 | RS-485 | RS-485 |
| Duplex Mode | Half-duplex | Half-duplex | Half-duplex | Half-duplex | Half-duplex | Half-duplex |
关键差异点
- Documented high-speed half-duplex operation （对比 MAX485CSA-T)
- Enhanced transient protection （对比 MAX485ESA+)
- Direct manufacturer-family compatibility （对比 SP485EN-L)
- Documented industrial temperature range （对比 MAX485CSA-T)
设计说明
Route the differential driver and receiver pair as a tightly coupled pair with continuous impedance and no intervening stubs. Keep the transceiver close to the connector and place protection devices near the entry point. Provide a low-impedance ground reference along the cable interface because common-mode energy cannot be referenced reliably without a nearby ground conductor. Avoid sharing narrow return paths with switching converters or motors.
Decouple the 5 V transceiver supply with local high-frequency and bulk capacitance, placing the closest capacitor directly beside the supply and ground pins. Keep supply and return paths compact so switching noise does not enter the receiver through the common-mode range. The verified material does not provide a recommended capacitor value, so use the manufacturer application circuit as the controlling reference rather than substituting an arbitrary value.
Do not treat the integrated ±15 kV-class ESD rating as complete lightning or industrial-surge protection. A long cable connected outside the enclosure may require external surge and common-mode protection. Termination belongs at the physical ends of the bus, not at every node, while fail-safe biasing must be designed so an inactive driver does not leave the receiver output undefined. These steps are essential for reliable multidrop RS-485 operation.
The SP485 family is described as a low-EMI BiCMOS implementation, but PCB layout still determines much of the radiated and conducted emission. Use a solid ground plane, avoid large copper loops around the driver and connector, and minimize the distance between the transceiver, protection network, and connector. If emissions fail limit testing, investigate edge-rate behavior, cable common-mode conversion, chassis grounding, and shield termination before changing the transceiver.
合规信息
The verified search results mention IEC 61000-4-2 air-discharge ESD testing but do not provide exact RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification declarations for SP485EEN-L/TR.