SP485EEP-L - 5Mbps Half-Duplex RS-485 Transceiver | MaxLinear
MPN: SP485EEP-L ✓ פעילSP485EEP-L סקירה
An RS-485 transceiver is an interface IC that converts logic-level transmit and receive signals into a differential, multipoint bus. Within the hierarchy of serial-interface devices, the SP485EEP-L belongs to the RS-485 transceiver class, where it is also compatible with RS-422 signaling. Its half-duplex arrangement means the bus can transmit or receive, but not both simultaneously.
The principal features include operation up to 5 Mbps, enhanced ESD tolerance exceeding ±15 kV for the Human Body Model and the IEC61000-4-2 air-discharge method, and a low-power BiCMOS design. The device operates over a -40°C to +85°C temperature range and supports both RS-485 and RS-422 serial protocols. Only a 5 V supply is required.
The SP485EEP-L belongs to the SP481E and SP485E transceiver family, which is designed to be pin-to-pin compatible with the original Exar SP481 and SP485 devices and popular industry-standard implementations. Its enhanced ESD performance is especially useful where the transceiver connects directly to an exposed industrial or communications cable.
Typical uses include industrial RS-485 buses, building-automation controllers, instrumentation links, data-acquisition equipment, and other low- to high-speed isolated or non-isolated multidrop networks. In a half-duplex implementation, the DE and active-low RE inputs determine whether the transmitter or receiver is enabled.
When laying out a circuit, route the differential A and B bus connections as a controlled-impedance pair, provide the decoupling and termination components recommended by the manufacturer, and connect the transceiver interface pins according to the complete system grounding strategy. The 5 Mbps capability does not remove the need for good cable, termination, and grounding practice.
This product data combines the verified MaxLinear and distributor information with explicit comparison rows, application guidance, and practical interface-design notes. It distinguishes verified facts from unavailable commercial values and identifies the limits of the available drop-in replacement evidence.
חלופות תחליף ישיר עבור SP485EEP-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 SP485EEP-L (אותו גורם צורה וטביעת רגל) — שונים ב Mounting Type, Package, Data Rate, Product Type.
SP485EEN-L
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←SP485ECN-L
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←SP485ECP-L
✅ Drop-Inצור קשר לקבלת מחיר
SP481E
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
SP485EEP-L מפרטים
| Product Type | Half-duplex RS-485/RS-422 transceiver |
| Maximum Data Rate | 5 Mbps |
| מתח אספקה | 5 V |
| Supported Protocols | RS-485 and RS-422 |
| Process Technology | BiCMOS |
| ESD Protection, Human Body Model | Over ±15 kV |
| ESD Protection, IEC61000-4-2 Air Discharge | Over ±15 kV |
| טווח טמפרטורת פעולה | -40°C to +85°C |
| מארז | 8-pin PDIP |
| סוג הרכבה | Through-hole |
| Transceiver Configuration | 1 transmitter and 1 receiver |
| Duplex Mode | Half-duplex |
| Power Consumption | Low-power operation |
| Enhanced ESD Performance | Yes |
| Legacy Pin Compatibility | Pin-to-pin compatible with Exar SP481 and SP485 devices |
| Delivery Format | Tube |
תצורת פינים של SP485EEP-L
| פין 1 | RO — Receiver output |
| פין 2 | RE — Active-low receiver enable |
| פין 3 | DE — Driver enable |
| פין 4 | DI — Driver data input |
| פין 5 | GND — Ground |
| פין 6 | A — Non-inverting differential bus terminal |
| פין 7 | B — Inverting differential bus terminal |
| פין 8 | VCC — 5 V power supply |
יישומים טיפוסיים
SP485EEP-L מתאים עבור 6 יישוםs: Industrial RS-485 Control Bus, Building Automation and HVAC Communications, Data Acquisition and Instrumentation, Security and Surveillance Peripherals, Instrumentation and Test Equipment, RS-422 Point-to-Point Links.
Industrial RS-485 Control Bus
The SP485EEP-L fits a 5 V industrial control or sensor bus that requires a half-duplex differential interface and a data rate of up to 5 Mbps. Its BiCMOS implementation provides low-power operation, while ESD tolerance exceeding ±15 kV under the Human Body Model and IEC61000-4-2 air-discharge method adds protection where the transceiver may be connected to an exposed cable. The device is placed at the bus node with A and B routed as a pair, a termination strategy selected for the network topology, and DE and active-low RE controlled so that only one driver transmits at a time. Verify cable length against the actual data rate because the 5 Mbps capability does not guarantee reliable operation over an arbitrary cable length.
מומלץ
Building Automation and HVAC Communications
The SP485EEP-L is appropriate for half-duplex RS-485 building-automation and HVAC controller networks operating from a 5 V rail. Its 5 Mbps maximum rate exceeds the throughput required by many supervisory-controller links, while the -40°C to +85°C operating range supports temperature variation in equipment rooms and industrial enclosures. The transceiver can interface a controller UART to a differential automation bus, with DE and active-low RE managed by the host controller. Its enhanced ESD rating is valuable when bus wiring enters a distribution panel, although the installer still needs a suitable earth and shield strategy to prevent ground-potential problems.
מומלץ
Data Acquisition and Instrumentation
The SP485EEP-L can connect a compact data-acquisition or instrumentation controller to an RS-485 measurement bus. The 5 Mbps capability supports high-throughput command traffic, and the low-power BiCMOS design is useful in multi-node systems where each instrument contributes to the aggregate power budget. The controller UART drives the transmit input, while direction-control firmware enables the driver only during transmission and enables the receiver during responses. Its enhanced ESD protection is especially helpful near external sensor cables. For sensitive analog measurements, use separate analog and digital grounding practices and avoid allowing large bus return currents to flow through sensitive reference paths.
מומלץ
Security and Surveillance Peripherals
The SP485EEP-L is suitable for a low-cost RS-485 connection between surveillance equipment and a peripheral such as a camera housing, access-control reader, or remote sensor. Half-duplex operation allows a compact controller to share a multidrop wiring infrastructure, and the 5 V supply requirement simplifies integration with powered field equipment. The device's ESD tolerance exceeding ±15 kV provides useful robustness at externally accessible cable interfaces, although enclosure bonding and surge protection remain separate design requirements. Direction control should be designed so that addressable nodes do not transmit simultaneously. The 5 Mbps rate supports bursty data traffic but does not change the bandwidth limit imposed by the physical cable and installed distance.
מומלץ
Instrumentation and Test Equipment
The SP485EEP-L can serve as the differential bus interface in bench or field test equipment that communicates with remote sensors, fixtures, or programmable instruments. Its low-power operation supports compact portable equipment, and its 8-pin PDIP package allows straightforward through-hole assembly where serviceability is important. The 5 Mbps interface rate can reduce transfer time for data-heavy test sequences, while the half-duplex architecture avoids requiring separate transmit and receive bus pairs. Use controlled-impedance routing for A and B, place supply decoupling near the device, and follow the manufacturer's termination guidance. Verify grounding carefully because a shared test-chassis ground can create ground offsets that obscure low-level measurements.
מומלץ
RS-422 Point-to-Point Links
The SP485EEP-L can also be used for RS-422 point-to-point communication because the manufacturer identifies the SP481E and SP485E family as supporting both RS-485 and RS-422 protocols. A 5 V system can use the transceiver differential output and receiver input to connect two circuit boards or instruments, with the 5 Mbps maximum rate supporting fast command and measurement transfers. Unlike a multidrop RS-485 network, an RS-422 link has a dedicated driver on the transmitting end and a dedicated receiver on the receiving end. This avoids contention but still requires controlled cable impedance and common-mode management. Confirm logic levels, propagation delay, and termination requirements in the complete datasheet before finalizing the interface.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור SP485EEP-L — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | SP485EEN-L | SP485ECN-L | SP485ECP-L | SP481E |
|---|---|---|---|---|---|
| Package | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP |
| Brand | MaxLinear | MaxLinear | MaxLinear | MaxLinear | MaxLinear |
| Supply Voltage | 5 V | 5 V family operation | 5 V family operation | 5 V family operation | 5 V family operation |
| Duplex Mode | Half-duplex | Half-duplex family | Half-duplex family | Half-duplex family | Half-duplex family |
| Supported Protocols | RS-485 and RS-422 | RS-485 and RS-422 family | RS-485 and RS-422 family | RS-485 and RS-422 family | RS-485 and RS-422 family |
מבדילים עיקריים
- Higher verified maximum data rate than the lower-speed family alternatives (לעומתSP485ECN-L)
- Enhanced ESD protection for cable-connected interfaces (לעומתSP481E)
- Single 5 V low-power BiCMOS implementation (לעומתSP485ECP-L)
הערות תכנון
Route the A and B connections as a differential pair with continuous geometry and minimal stubs. Keep the transceiver close to the connector or protection network so surge and ESD currents are diverted before reaching sensitive circuitry. Do not create uncontrolled branches to test points; excessive stub length can degrade the 5 Mbps edge rate and increase reflections.
Avoid enabling the driver and receiver for conflicting directions during bus turnaround. Firmware should assert DE only while transmitting and deassert it after the final stop bit, while active-low RE determines receiver availability. If multiple nodes can transmit, the system must guarantee that only one driver is enabled at a time to prevent bus contention and excessive current.
Use the termination and biasing arrangement required by the installed bus topology rather than indiscriminately adding termination at every node. A single termination at each physical end of a long point-to-point cable may be appropriate, while multidrop RS-485 networks can require different bias placement. Confirm grounding and shield use so common-mode voltage and ground-potential differences do not degrade receiver operation.
Place the supply-decoupling capacitor close to the VCC and GND pins and follow the manufacturer layout guidance. The SP485EEP-L is a 5 V, low-power BiCMOS device, but local decoupling remains necessary because cable transients and bus-driver switching can create high-frequency supply disturbance. Verify the regulator tolerance and power-source impedance at the transceiver pins rather than assuming the nominal 5 V rail is sufficient under worst-case load transients.
מידע על תאימות
The verified excerpts do not provide explicit environmental-compliance declarations. AEC-Q100 is not applicable because this is an industrial/communications interface IC rather than an automotive-qualified device.