SP485EMN-L/TR - 5Mbps RS-485 Transceiver | MaxLinear
MPN: SP485EMN-L/TR ✓ NakahandaSP485EMN-L/TR Ulas
An RS-485 transceiver is a physical-layer interface IC that converts logic-level signals into differential bus signals and receives differential bus signals back into CMOS-compatible logic. In the hierarchy, the SP485EMN-L/TR is a half-duplex line transceiver, part of the broader RS-422/RS-485 interface IC and interface-driver/receiver family within integrated interface semiconductors. Differential signaling improves noise immunity by rejecting common-mode voltage that can disrupt single-ended logic interconnects.
The principal verified features are one driver, one receiver, half-duplex operation, RS-422 and RS-485 protocol support, operation up to 5 Mbps, and low-power BiCMOS design. The SP485EMN-L/TR also provides enhanced ESD performance, with available comparison data indicating tolerance above ±15 kV for the human-body model and IEC 61000-4-2 air-discharge method. The 8-pin SOIC package is compatible with standard surface-mount assembly and leaded-solder inspection processes.
A typical half-duplex circuit connects the transceiver driver and receiver to the same differential pair through direction-control logic. The DE and RE inputs determine whether the node transmits or receives. Designers must manage driver enable timing, bus turnaround delays, termination, biasing, and protection-network placement to avoid contention and receiver misinterpretation during direction changes.
Common applications include industrial automation links, building-control networks, remote sensor modules, industrial instrumentation, and long-distance RS-485 equipment links. The 5-Mbps capability supports high-speed point-to-point or multipoint industrial buses, while the low-power BiCMOS implementation is useful when system-level energy consumption matters.
The main design consideration is the transceiver interface around the SOIC-8 pins. Keep the bus trace path short, preserve symmetry between differential conductors, place termination only at physical bus endpoints, and use suitable common-mode protection for exposed cables. The DE/RE control signals should be sequenced so the receiver is enabled before the driver transmits and the driver is disabled before the receiver switches.
This page combines manufacturer-family information, distributor availability, package details, verified cross-reference results, replacement guidance, and application-specific engineering notes to help engineers evaluate the SP485EMN-L/TR beyond a basic distributor listing.
Mga alternatibo na pwedeng ilagay na SP485EMN-L/TR — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok SP485EMN-L/TR (parehas na form factor at footprint) — pagkakaiba sa Package, Product Type, Package Width, Operating Temperature Range, RoHS Status.
SP485ECN-L
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →SP485EN-L
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →SP485CN-L/TR
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
SP485EEN-L
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →MAX485CSA-T
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
SP485EMN-L/TR Mga Spesipikasyon
| Product Type | RS-422/RS-485 half-duplex line transceiver |
| Number of Drivers | 1 driver |
| Number of Receivers | 1 receiver |
| Supported Protocols | RS-422 and RS-485 |
| Maximum Data Rate | 5 Mbps |
| Operating Mode | Half-duplex |
| Process Technology | BiCMOS |
| Power Characterization | Low-power operation |
| ESD Protection | Over ±15 kV for human-body model and IEC 61000-4-2 air-discharge method |
| Packhaging | 8-pin SOIC (PDSO8) |
| Package Pin Count | 8 pins |
| Uri ng Pagpapasok | Surface mount |
| Hanay ng Temperature na Operasyon | -40 °C to +125 °C |
| Automotive Qualification | Not qualified |
| Tindminan RoHS | Compliant |
| Lead-Free Finish | Matte tin (Sn) |
| Manufacturer | MaxLinear |
Gabay sa Pin Configuration ng SP485EMN-L/TR 8 pins
Pin configuration para sa SP485EMN-L/TR (8 pins package). Ang pagnunumero ng pin, mga function, at connection diagram ay tinukoy sa datasheet ng manufacturer. Sumangguni dito para sa eksaktong footprint at mga alituntunin sa soldering.
Wala ng detalyadong pinout data na magagamit para sa SP485EMN-L/TR.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
SP485EMN-L/TR ay nararapat para sa 6 aplikasyons: Industrial Automation Networks, Building Control Systems, Remote Sensor Modules, Industrial Test and Measurement, Security and Access-Control Equipment, RS-422 Point-to-Point Links.
Industrial Automation Networks
The SP485EMN-L/TR suits industrial automation buses that require a low-power half-duplex differential interface. Its one-driver, one-receiver configuration and operation up to 5 Mbps allow a controller to exchange data with remote sensors, drives, or I/O modules over a shared RS-485 pair. The BiCMOS architecture supports low system power, while enhanced ESD protection above ±15 kV adds protection for factory environments. Board designers should preserve trace symmetry, terminate only at bus endpoints, and validate common-mode range and surge requirements for the actual cable length and topology.
Inirekomenda
Building Control Systems
The SP485EMN-L/TR can connect thermostats, access-control units, lighting controllers, and supervisory controllers in a building-control network. Half-duplex RS-485 operation reduces wiring cost by allowing multiple nodes to share a twisted pair, while the 5-Mbps maximum rate supports factory-default programming as well as routine command traffic. The -40 °C to +125 °C rating is useful in equipment rooms, but in-wall cables may require external surge and common-mode protection beyond the device's enhanced on-chip ESD capability.
Inirekomenda
Remote Sensor Modules
The SP485EMN-L/TR is appropriate for remote sensor nodes that report measurements over an industrial RS-485 bus. A single driver and receiver provide bidirectional service using one cable pair, and the 5-Mbps capability allows short polling loops to complete quickly. Low-power BiCMOS operation is valuable in space-constrained instrumentation, although the complete node's sleep strategy must be designed around the transceiver's operating state. Add bus biasing only where required, and keep protection components outside the high-speed differential path.
Inirekomenda
Industrial Test and Measurement
The SP485EMN-L/TR can connect laboratory instruments, programmable controllers, and test fixtures that communicate over RS-422 or RS-485. Its 5-Mbps capability supports high-volume command and response traffic, and the half-duplex topology keeps interface wiring economical. For bench equipment, preserve a controlled ground relationship through the cable and interface design, use shielded or twisted-pair cabling where appropriate, and avoid long unprotected stubs. The transceiver's -40 °C to +125 °C range also supports equipment intended for extended-temperature environments.
Inirekomenda
Security and Access-Control Equipment
The SP485EMN-L/TR fits access-control panels, camera-door stations, and intercom controllers that need a wired half-duplex communication path. Its differential RS-485 interface reduces susceptibility to the common-mode noise found near motors, relays, and switching power supplies, while enhanced ESD protection is valuable around frequently touched equipment. The 5-Mbps ceiling supports rapid configuration downloads and firmware transport. Correct DE and /RE timing is essential when an endpoint changes direction, and cable transients should be handled with appropriately rated external protection.
Inirekomenda
RS-422 Point-to-Point Links
Although highlighted for RS-485 networks, the SP485EMN-L/TR also supports RS-422, making it useful for full-duplex or point-to-point differential links when configured with the appropriate signals. The 5-Mbps maximum data rate supports high-speed communication over properly terminated cable. Unlike a dedicated RS-422 transceiver, the target is described as a half-duplex family member, so the system designer must confirm the required full-duplex arrangement using separate transmit and receive channels. Biasing and termination should be calculated for the selected RS-422 topology rather than copied from an RS-485 network.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for SP485EMN-L/TR — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | SP485ECN-L | SP485EN-L | SP485CN-L/TR | SP485EEN-L | MAX485CSA-T |
|---|---|---|---|---|---|---|
| Package | 8-pin SOIC (PDSO8) | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Brand | MaxLinear | MaxLinear | MaxLinear | MaxLinear | MaxLinear | Maxim Integrated |
Pangunahing mga Pagkakaiba
- Direct SP485 family replacement path (kumpara saMAX485CSA-T)
- Documented 5 Mbps family performance (kumpara saSP485ECN-L)
- Extended-temperature operation (kumpara saSP485EN-L)
- Distributor availability (kumpara saSP485EEN-L)
Talaan ng Disenyo
Route the RS-485 differential pair as a tightly coupled pair over a continuous ground plane, keeping the pair away from switching nodes and clocks. Match the driver and receiver connections consistently to the connector and protection-device layout. Do not route the bus through unprotected long PCB traces on exposed equipment; place common-mode protection close to the connector and keep the high-speed path between the transceiver and protection network short.
Prevent bus contention by allowing only one node to enable its driver at a time. Sequence /RE and DE so the receiver is ready before the driver starts and the driver is disabled before the receiver changes state. Include sufficient dead time for the driver to become passive. Do not add termination resistors at every node: place a termination matching the cable impedance only at each physical end of the bus, and determine whether fail-safe biasing is needed at the selected topology.
Use a twisted pair with a continuous reference ground or shield appropriate to the installation, and keep common-mode transients within the transceiver's verified limits. The available data confirms enhanced ESD performance above ±15 kV for human-body and IEC 61000-4-2 air-discharge testing, but ESD qualification does not replace surge, lightning, or EFT protection. Select external protection with suitable standoff voltage and capacitance after reviewing the exact datasheet limits.
Impormasyon ng Pagsunod sa Kautusan
The verified comparison data identifies the SP485EMN-L/TR as RoHS compliant, not qualified for automotive applications, and supplied with a matte tin finish. No verified REACH, halogen-free, or conflict-minerals declaration was provided.
