SP485EEN-L/TR - 10Mbps Low-EMI RS-485 Transceiver | MaxLinear
MPN: SP485EEN-L/TR ✓ Hoạt độngSP485EEN-L/TR Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho SP485EEN-L/TR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với SP485EEN-L/TR (cùng hình factor và footprint) — khác nhau ở Data Rate, Package, Supply Voltage, RoHS Status, Duplex.
SP485CN-L/TR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SP485EEN-L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →SP485EN-L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX485CSA-T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX485ESA+
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →SP485EEN-L/TR Thông số kỹ thuật
| 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 |
| Hộp | 8-pin SOIC |
| Kiểu lắp đặt | Surface mount |
| Khoảng nhiệt độ hoạt động | -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 |
Hướng dẫn cấu hình chân SP485EEN-L/TR 8-pin soic
Cấu hình chân cho SP485EEN-L/TR (8-pin soic gói). Số thứ tự chân, chức năng và sơ đồ kết nối được xác định trong tài liệu thông số kỹ thuật của nhà sản xuất. Tham khảo nó để biết footprint và hướng dẫn hàn chính xác.
Không có dữ liệu chân cụ thể sẵn có cho SP485EEN-L/TR.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
SP485EEN-L/TR phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho SP485EEN-L/TR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Documented high-speed half-duplex operation (vsMAX485CSA-T)
- Enhanced transient protection (vsMAX485ESA+)
- Direct manufacturer-family compatibility (vsSP485EN-L)
- Documented industrial temperature range (vsMAX485CSA-T)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.