SP485EN-L - 5Mbps RS-485/RS-422 Transceiver | MaxLinear
MPN: SP485EN-L ✓ פעילSP485EN-L סקירה
An RS-485/RS-422 transceiver is an interface IC that converts logic-level signals into balanced differential transmissions and reconstructs received data from differential bus voltage. These transceivers form the physical communication layer between processors, controllers, sensors, and remote equipment, with RS-422 commonly supporting point-to-point links and RS-485 supporting multipoint buses.
The SP485EN-L family provides half-duplex operation, one differential driver, and one differential receiver. Its 5Mbps capability suits high-rate industrial, instrumentation, and embedded links, while the 5V-only operating range makes supply compatibility a central design consideration. A nominal 5V supply is accepted, and the verified operating range extends from -40°C to 85°C.
The BiCMOS process is intended to reduce power use relative to older bipolar transceiver designs without sacrificing line performance. The receiver uses differential inputs with Schmitt-trigger behavior, supporting robust decoding of signals shaped by cable attenuation, reflections, and common-mode noise. Exact driver load, receiver sensitivity, propagation delay, and input-current figures are not present in the supplied verified data and therefore require confirmation from the manufacturer datasheet.
Typical uses include industrial controller links, factory automation equipment, remote sensor networks, data acquisition units, building controls, and embedded serial buses. In a half-duplex design, the direction-control signal determines whether the device transmits or receives; only the selected node should enable its driver to prevent multiple drivers from driving the same bus.
Place the transceiver close to the bus connector and provide the decoupling and protection required by the system. A common RS-485 layout uses a low-impedance ground reference alongside A, B, and the differential pair. External protection, termination, biasing, and isolation remain application-specific choices rather than functions confirmed as integrated into the SP485EN-L.
This product summary combines the verified distributor, manufacturer, and cross-reference information with practical RS-485 design guidance. It distinguishes documented parameters from missing electrical details, focuses on the genuine 8-pin drop-in alternatives, and helps engineers evaluate supply, speed, temperature, bus topology, and protection requirements before procurement.
חלופות תחליף ישיר עבור SP485EN-L — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם SP485EN-L (אותו גורם צורה וטביעת רגל) — שונים ב Product Type, Operating Temperature Range, Mounting Type, Package, Maximum Data Rate.
MAX485EESA+
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←SP485EEN-L/TR
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←SP485EMN-L/TR
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←LTC485IN8#PBF
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ST485EBDR
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
SP485EN-L מפרטים
| Product Type | Half-duplex differential transceiver |
| Interface Standards | RS-422 and RS-485 |
| Maximum Data Rate | 5 Mbps |
| Supply Voltage Range | 4.75V to 5.25V |
| Nominal Supply Voltage | 5 V |
| טווח טמפרטורת פעולה | -40°C to +85°C |
| Driver and Receiver Count | 1 differential driver and 1 differential receiver |
| Duplex Mode | Half-duplex |
| Receiver Input Type | Differential Schmitt-trigger input |
| Process Technology | BiCMOS |
| מארז | 8-pin SOIC |
| Package Width | 3.9 mm |
| Package Length | 4.9 mm |
| סוג הרכבה | Surface mount |
| Transceiver Count per Package | 1 |
| סטטוס RoHS | unknown |
| REACH Status | unknown |
תצורת פינים של SP485EN-L
| פין 1 | RO — Receiver output |
| פין 2 | /RE — Receiver enable input, active low |
| פין 3 | DE — Driver enable input |
| פין 4 | DI — Driver data input |
| פין 5 | GND — Ground |
| פין 6 | A — Noninverting differential bus terminal |
| פין 7 | B — Inverting differential bus terminal |
| פין 8 | VCC — Positive supply |
יישומים טיפוסיים
SP485EN-L מתאים עבור 6 יישוםs: Industrial RS-485 Controller Links, Remote Sensor Data Acquisition, Building and HVAC Automation, Data Acquisition and Test Equipment, Embedded Serial Gateways, Factory Motor and Equipment Interfaces.
Industrial RS-485 Controller Links
The SP485EN-L is a fit for industrial half-duplex links that need a 5Mbps-class RS-485 transceiver in an 8-pin SOIC. Its 4.75V-to-5.25V supply range and -40°C-to-85°C operating range provide a useful baseline for factory equipment, controller boards, and remote I/O. Install it between the host UART or logic interface and the A/B bus pair. Add termination, biasing, surge protection, and a suitable ground reference; the IC does not replace those system-level protections. Verify timing and drive capability against the official datasheet before selecting the link length and baud rate.
מומלץ
Remote Sensor Data Acquisition
The SP485EN-L can connect a remote sensor node to a central controller over a balanced RS-485 bus. Its differential receiver and Schmitt-trigger behavior help decode signals after cable attenuation, reflections, and common-mode disturbance, while the 5Mbps rating provides ample link margin for many measurement systems. Keep the transceiver and bus protection close to the connector, route A and B as a tight differential pair, and provide a low-impedance ground reference. Confirm actual receiver sensitivity, propagation delay, and node loading in the manufacturer datasheet before defining the baud rate and cable length.
מומלץ
Building and HVAC Automation
The SP485EN-L is suitable for half-duplex building-control trunks carrying sensor, actuator, and controller commands over long cable runs. The -40°C-to-85°C range can suit equipment rooms and industrial building controls, but the exact enclosure temperature and supply tolerance still need validation. Use an external protection network for transients, common-mode chokes or filtering when required, and controlled biasing so the bus remains defined when no node transmits. The 5Mbps capability supports higher protocol rates, while RS-485 distance and topology remain the practical bandwidth and reliability limits.
מומלץ
Data Acquisition and Test Equipment
The SP485EN-L can serve as the physical link between an instrument controller and remote measurement hardware in a data-acquisition system. Its 5V supply requirement makes it convenient where the surrounding electronics already use regulated 5V, and its half-duplex architecture allows one bus to support multiple addressed nodes. Keep the analog and sensitive digital sections away from the bus connector, use a controlled reference ground, and validate the driver/receiver timing against the instrument controller. For laboratory environments with long leads or ground-loop risk, consider an isolated interface instead of relying on the non-isolated SP485EN-L alone.
מומלץ
Embedded Serial Gateways
The SP485EN-L is appropriate for an embedded gateway that translates a host UART to an RS-485 field bus. The 8-pin SOIC footprint supports compact industrial controller layouts, and the 4.75V-to-5.25V operating range aligns with many legacy 5V systems. Firmware must enforce one active driver at a time and manage bus turnaround timing; otherwise contention can corrupt transmissions or increase stress on the driver. Add termination only where appropriate for the cable, bias the differential pair in a controlled manner, and use protection components selected for the installation’s surge and ESD environment.
מומלץ
Factory Motor and Equipment Interfaces
The SP485EN-L can connect industrial controllers, motor-drive monitoring equipment, and service interfaces that use half-duplex differential signaling. The family’s stated RS-422/RS-485 support and 5Mbps capability provide useful protocol flexibility, but the IC is not a motor driver and does not provide isolation. Keep high-energy switching nodes and motor wiring physically separated from the transceiver and route A/B as a differential pair. Confirm the transceiver’s drive strength, receiver thresholds, thermal margin, and protection requirements in the official datasheet before using it in a factory environment.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור SP485EN-L — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | MAX485 | SP485EEN-L/TR | SP485EMN-L/TR | LTC485IN8#PBF | ST485EBDR |
|---|---|---|---|---|---|---|
| Package | 8-pin SOIC | SOIC-8 | 8-SOIC | SOIC-8 | SOIC-8 | SOIC-8 |
| Brand | MaxLinear | Maxim Integrated | MaxLinear | MaxLinear | Analog Devices | STMicroelectronics |
מבדילים עיקריים
- Verified MaxLinear sourcing and documented 5Mbps SP485 family capability (לעומתLTC485IN8#PBF)
- BiCMOS implementation aimed at lower power than older bipolar designs (לעומתMAX485)
- Industrial temperature coverage for equipment-room and factory environments (לעומתSP485EEN-L/TR)
הערות תכנון
Place the SP485EN-L close to the RS-485 connector and route A and B as a tight differential pair over a continuous reference plane. Keep the transceiver and protection network away from high-current switching paths. The supplied verified data does not specify exact capacitor values or trace geometry, so use the manufacturer’s recommended layout and termination guidance rather than relying on a generic schematic.
Do not allow multiple nodes to drive the bus simultaneously. In a half-duplex design, coordinate DE and /RE with the host UART and account for driver turn-on and turn-off timing. Verify the exact pin names and active levels from the official SP485EN-L datasheet before finalizing the control logic; the supplied search results confirm the function class but do not provide a complete pin table.
Use controlled bus biasing so the differential line has a defined state during idle periods, and install termination at the physical ends of the cable rather than at every node. Add surge and ESD protection selected for the actual installation. The SP485EN-L is a line transceiver, not a complete protection network, and its 5Mbps capability does not eliminate cable or connector effects.
The SP485EN-L operates from 4.75V to 5.25V, so validate regulator tolerance, startup sequencing, and the voltage observed at the IC during bus activity. Place local supply decoupling close to the device and keep return-current paths short. Exact recommended capacitance and ESR are marked as missing because they are not specified in the supplied verified results.
מידע על תאימות
The supplied verified results identify the device as a MaxLinear RS-485/RS-422 interface IC but do not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations.