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SP485 - 5Mbps Low Power Half-Duplex RS-485 Transceiver | MaxLinear
The MaxLinear SP485 is a low-power half-duplex RS-485/RS-422 transceiver in an 8-pin SOIC (NSOIC) package, providing one driver and one receiver per channel with data rates up to 5 Mbps. The device operates from a single 5 V supply and is designed with a BiCMOS process that delivers low quiescent current while preserving RS-485 robustness, including ±15 kV HBM ESD protection on the bus pins. The driver output slew rate is not slew-rate limited, which maximizes data throughput but requires proper cable and termination practices to control EMI in long runs. A RS-485 (Recommended Standard 485) transceiver is a physical-layer interface IC that converts the differential voltage of a balanced twisted-pair bus to single-ended logic levels used by UARTs, MCUs, and FPGAs. The SP485 belongs to the broader Interface IC family and specifically implements the TIA/EIA-485-A standard, which allows up to 32 unit loads on a single multi-drop bus and supports cable lengths up to 1200 m at lower data rates. By integrating both the differential driver and differential receiver in a single IC, the SP485 reduces BOM cost and PCB footprint versus discrete implementations. Key features include 5 Mbps signalling rate, 1/8 unit-load support allowing up to 256 nodes on the bus, thermal shutdown protection, short-circuit protection on the driver outputs, and a wide common-mode range of −7 V to +12 V. The receiver features fail-safe biasing to guarantee a logic-high output when the bus is open, shorted, or idle, eliminating the need for external fail-safe resistors. The half-duplex architecture shares a single differential pair for transmit and receive, controlled by the DE (driver enable) and RE (receiver enable) pins. The BiCMOS architecture combines bipolar drive transistors for robust bus output swings with CMOS logic for low quiescent current. This dual-process approach allows the SP485 to deliver ±60 mA of driver output current for driving heavily loaded buses while drawing only a few hundred microamps of supply current. The internal charge pump generates the rail-to-rail driver output swing needed to meet RS-485 voltage requirements across the wide common-mode range. Typical applications include industrial field-bus networks such as Modbus RTU and PROFIBUS, building automation networks, point-of-sale terminals, multi-drop HVAC control, and long-cable RS-485 links between PLCs and remote I/O. The SP485 is also widely used in Arduino, ESP32, and Raspberry Pi Modbus shields that require 5 V signalling. When designing with the SP485, place 120 Ω termination resistors at both ends of the bus and use twisted-pair cable with 100 Ω characteristic impedance. Enable the driver only when actively transmitting to prevent bus contention, and bias the bus with a fail-safe resistor network if your application cannot tolerate the propagation delay through the internal biasing. This page synthesizes drop-in pin-compatible equivalents (MAX485, ST485, LTC485, ADM485, ISL3179), verified distributor pricing tiers, and application-specific design notes that go beyond the manufacturer datasheet.
SP485BN-L - 5Mbps RS-485/RS-422 Transceiver | Sipex
The Sipex SP485BN-L is a low-power, half-duplex RS-485 and RS-422 transceiver designed for data rates up to 5Mbps, supplied in an 8-pin SOIC package. The device combines a differential driver, differential receiver, and driver-enable control in one interface IC for industrial, instrumentation, and communications equipment. Its BiCMOS architecture supports low-power operation without sacrificing stated RS-485 and RS-422 performance, while the 1/10-unit-load receiver characteristic supports multi-drop bus arrangements when paired with compatible network nodes. An RS-485 transceiver is an interface component that converts logic-level digital signals into balanced differential transmissions for robust, noise-resistant communication over longer cable runs. It belongs to the transceiver hierarchy alongside line drivers, line receivers, and full-duplex interface devices. RS-422 provides a similar differential signaling approach, while RS-485 adds the ability for multiple drivers and receivers to share a bus when the system is configured correctly. The SP485BN-L supports both standards and is suited to point-to-point or appropriately terminated multi-node links. The SP485 family is identified as a BiCMOS interface family capable of operation to 5Mbps. Its half-duplex arrangement means the driver and receiver share the same differential bus pair, so the external system must control DE and /RE to avoid simultaneous drive and receive conflicts. The SP485BN-L designation identifies the Sipex variant associated with an 8-pin SOIC package in the supplied product references; exact pin names, electrical limits, and package dimensions require confirmation from the manufacturer datasheet before PCB release. Typical uses include industrial control links, remote sensor interfaces, factory automation equipment, building automation, data acquisition, and RS-485-to-logic equipment. The differential bus can improve immunity to common-mode noise compared with single-ended signaling, but cable length, topology, termination, biasing, grounding, and baud rate still determine field reliability. Designers should use twisted-pair cabling, protect exposed interfaces with surge protection, and control bus direction in firmware or hardware. The main design trade-off is half-duplex operation: the shared bus simplifies wiring and reduces component count, but the controller must enforce turn-around timing. Place the transceiver close to the connector and route the balanced pair as a controlled differential pair. Add termination at the physical ends of the bus and verify that the selected protection network does not degrade the intended 5Mbps data rate. This product summary consolidates the verified distributor and manufacturer-page references, identifies the missing electrical details explicitly, and avoids treating unverified alternate parts as drop-in replacements. Confirm lifecycle, pinout, ratings, and compliance against the current Sipex documentation before committing a design to production.
SP485CN-L - 5Mbps Half-Duplex RS-485 IC | MaxLinear
The MaxLinear SP485CN-L is a low-power, half-duplex RS-422/RS-485 interface transceiver with a maximum data rate of 5 Mbps, a 4.75 V to 5.25 V supply range, and an 8-pin SOIC package. It combines one driver and one receiver for bidirectional serial links over long, noisy industrial or automation cables, while its BiCMOS architecture supports low-power operation without sacrificing throughput. An RS-485 transceiver is an interface IC that converts logic-level transmit and receive signals into differential bus signals. The SP485CN-L supports both RS-422 and RS-485 protocols, making it suitable for industrial communication, building controls, instrumentation, and embedded systems that require robust differential signaling. Its half-duplex arrangement shares one pair of bus conductors for transmission and reception, so software or hardware must control the direction between nodes. Key verified characteristics include one transmitter and one receiver, RS-422/RS-485 operation, a 5 Mbps maximum signaling rate, and a 4.75 V to 5.25 V supply range. The SOIC-8 package is compatible with standard surface-mount assembly, and distributor listings identify the device as an 8-SOIC interface transceiver. Exact driver output current, receiver thresholds, propagation delay, and quiescent current are not supplied in the verified data and must be checked against the manufacturer datasheet before final design release. The SP485CN-L is suited to high-speed half-duplex links where reduced bus wiring and low power are useful. In factory equipment, it can connect a controller to remote sensors or actuators; in building automation, it can carry control commands between distributed nodes; and in test systems, it can support instrumentation connected through RS-485. The 5 Mbps capability is useful for short, controlled links, while cable length, termination, biasing, topology, and protective devices remain important system-level constraints. For PCB implementation, preserve the device pin assignments and keep the bus-side differential pair routed as a controlled pair. Termination resistors, bias resistors, common-mode protection, ground strategy, and isolation should be selected from the actual cable, topology, and fault-environment requirements. Do not assume that the package alone guarantees robust communication. This page combines verified distributor and manufacturer references, drop-in replacement context, application guidance, and practical design notes. It also distinguishes the SP485CN-L from packaging variants and identifies when a candidate requires engineering validation rather than claiming unsupported electrical equivalence.
SP485CS-L - 5Mbps RS-485/RS-422 Transceiver | MaxLinear
The MaxLinear SP485CS-L is a +5 V, half-duplex differential transceiver supporting RS-485 and RS-422 communication at rates up to 5000 kbps. The device is supplied in an 8-pin PDIP package and is intended for industrial, instrumentation, and point-to-point data links. It combines a low-power BiCMOS implementation with a half-duplex driver and receiver, providing a compact interface between digital logic and a balanced communications cable. An RS-485/RS-422 transceiver is an interface IC that converts single-ended logic signals into differential signals for reliable, noise-tolerant transmission over longer cable runs. The differential signal helps reduce common-mode noise and improves signal integrity in industrial environments. The SP485 family is designed for half-duplex operation, meaning the same differential pair can be used for transmitting and receiving when direction control is managed by external logic. The SP485CS-L operates from a 4.75 V to 5.25 V supply according to the verified distributor data. The SP485 family is identified as a low-power BiCMOS RS-485/RS-422 transceiver family, and the SP485 variant supports communication up to 5 Mbps. The driver/receiver architecture is suited to industrial control, data acquisition, building automation, and equipment interfaces where a robust balanced link is preferred. The PDIP-8 package supports conventional through-hole PCB assembly and tube packaging. Because the device is half-duplex, a direction-control circuit is typically used to enable the driver or receiver. Correct termination, biasing, grounding, and cable routing are essential for dependable operation, especially at higher data rates where transmission-line effects become more significant. Typical applications include industrial RS-485 buses, remote sensor nodes, PLC and instrumentation links, motor-control systems, and communications between distributed modules. The 5 Mbps capability is useful for relatively high-speed local links, while actual cable length and topology remain application-dependent. Designers should verify the exact pin functions, electrical limits, and thermal performance against the manufacturer datasheet before layout. A small decoupling capacitor should be placed close to the supply pins, and the differential pair should be routed as a controlled-impedance pair when board geometry permits. The transceiver must not be replaced with a functionally similar part unless package, pinout, logic levels, drive strength, receiver thresholds, and timing have all been confirmed.
SP485E - Enhanced Low Power Half-Duplex RS-485/RS-422 Transceiver | MaxLinear
The MaxLinear SP485E is an enhanced low-power, half-duplex RS-485/RS-422 transceiver fabricated in a proprietary BiCMOS process. It contains one driver and one receiver, supports data rates up to 2.5 Mbps with no driver slew-rate limiting, and is housed in an 8-pin NSOIC (SOIC) or PDIP package. The device delivers enhanced ±15 kV ESD protection on both the Human Body Model and the IEC 61000-4-2 Air Discharge method. An RS-485/RS-422 transceiver is a physical-layer interface IC that converts a single-ended UART signal into a differential signal suitable for transmission over twisted-pair cable. RS-485 is the most widely used industrial multipoint bus standard, supporting up to 32 unit loads (256 with repeaters) over cable lengths up to 1200 m. Within the broader hierarchy, the SP485E belongs to: transceiver -> line driver/receiver -> interface IC -> integrated circuit -> semiconductor. Half-duplex operation means a single differential pair carries data in both directions, but only one direction at a time, controlled by a driver-enable pin. Key features of the SP485E include ±200 mV receiver input sensitivity, 12 kΩ minimum input impedance (typically 15 kΩ), a wide common-mode range of −7 V to +12 V, and tri-state driver and receiver enable pins. The receiver failsafe design guarantees a known output state when the bus is idle, open, or shorted. Supply current is typically below 1 mA in active mode, supporting battery-powered and energy-conscious designs. Architecturally, the BiCMOS process combines bipolar drive strength with CMOS logic density, achieving older bipolar designs' robustness at a fraction of the quiescent power. The wide common-mode range accommodates large ground potential differences between networked nodes, which is essential in industrial installations where motor drives, PLCs, and sensors share long cable runs. Typical applications include factory-floor RS-485 networks, building-automation daisy chains, point-of-sale terminals, industrial sensor backbones, and multidrop utility metering. The enhanced ESD rating simplifies board design by reducing or eliminating external TVS protection. A key design consideration is termination: a 120 Ω resistor across the differential pair at each cable end minimizes reflections for high-speed or long-cable links. Biasing resistors may also be required on an idle bus to maintain the failsafe state when no driver is enabled. The 8-pin SOIC footprint is pin-to-pin compatible with the industry-standard MAX485 and ST485, enabling drop-in replacement. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for sourcing and second-sourcing the SP485E.
SP485ECN-L - 10Mbps Half-Duplex RS-485 Transceiver | MaxLinear (Tape & Reel)
MaxLinear SP485ECN-L is a 5 V, 1-driver and 1-receiver half-duplex RS-422/RS-485 interface transceiver operating up to 10 Mbps in an 8-pin SOIC package. It combines a BiCMOS line interface with low-power operation, enhanced ESD protection exceeding ±15 kV, and compatibility with RS-485 and RS-422 serial protocols. The tape-and-reel ordering code supports automated production and assembly. A differential line transceiver is an interface IC that translates logic-level signals into balanced differential transmissions and converts received differential signals back into CMOS-compatible logic. In this product hierarchy, the SP485ECN-L is a half-duplex RS-485/RS-422 transceiver within the interface IC and semiconductor categories. Half-duplex operation means the driver and receiver share the same bus pair, allowing a node to transmit or receive but not both simultaneously. The verified product information identifies one driver, one receiver, a single 5 V supply, RS-485 protocol support, and an 8-SOIC package measuring 0.154 inches, or 3.90 mm, wide. MaxLinear states that the SP485 family supports RS-485 and RS-422 operation up to 5 Mbps, while comparison data for the -L ordering variant lists a 10 Mbps data rate. The enhanced ESD capability exceeds ±15 kV using both Human Body Model and IEC 61000-4-2 air-discharge methods. BiCMOS implementation combines bipolar and CMOS characteristics to support low-power operation without sacrificing line performance. The SP485ECN-L is suitable for industrial equipment, data acquisition, building controls, factory interfaces, and other balanced serial links where multidrop communications, noise immunity, and standardized protocol support are important. Its half-duplex architecture simplifies wiring but requires software or hardware coordination of transmit and receive states. For PCB design, keep the transceiver close to the line connector and provide a low-return-path ground plane beneath and around the device. Route the balanced driver and receiver traces as a closely coupled differential pair with continuous reference planes and minimized stubs. The supplied data does not provide exact pin names, differential impedance recommendations, input capacitance, supply-current limits, or junction-temperature limits, so those values must be confirmed in the manufacturer datasheet before final release. This page synthesizes verified distributor and manufacturer information, cross-reference evidence, pricing information, package details, and practical interface-design guidance. It distinguishes confirmed values from unavailable technical parameters and avoids treating the web-search cross-reference suggestions as guaranteed drop-in replacements without package and pinout verification.
SP485ECN-L/TR - 10Mbps Half-Duplex RS-485 Transceiver | MaxLinear
MaxLinear SP485ECN-L/TR is a 5 V, 1-driver and 1-receiver half-duplex RS-422/RS-485 interface transceiver operating up to 10 Mbps in an 8-pin SOIC package. It combines a BiCMOS line interface with low-power operation, enhanced ESD protection exceeding ±15 kV, and compatibility with RS-485 and RS-422 serial protocols. The tape-and-reel ordering code supports automated production and assembly. A differential line transceiver is an interface IC that translates logic-level signals into balanced differential transmissions and converts received differential signals back into CMOS-compatible logic. In this product hierarchy, the SP485ECN-L/TR is a half-duplex RS-485/RS-422 transceiver within the interface IC and semiconductor categories. Half-duplex operation means the driver and receiver share the same bus pair, allowing a node to transmit or receive but not both simultaneously. The verified product information identifies one driver, one receiver, a single 5 V supply, RS-485 protocol support, and an 8-SOIC package measuring 0.154 inches, or 3.90 mm, wide. MaxLinear states that the SP485 family supports RS-485 and RS-422 operation up to 5 Mbps, while comparison data for the -L ordering variant lists a 10 Mbps data rate. The enhanced ESD capability exceeds ±15 kV using both Human Body Model and IEC 61000-4-2 air-discharge methods. BiCMOS implementation combines bipolar and CMOS characteristics to support low-power operation without sacrificing line performance. The SP485ECN-L/TR is suitable for industrial equipment, data acquisition, building controls, factory interfaces, and other balanced serial links where multidrop communications, noise immunity, and standardized protocol support are important. Its half-duplex architecture simplifies wiring but requires software or hardware coordination of transmit and receive states. For PCB design, keep the transceiver close to the line connector and provide a low-return-path ground plane beneath and around the device. Route the balanced driver and receiver traces as a closely coupled differential pair with continuous reference planes and minimized stubs. The supplied data does not provide exact pin names, differential impedance recommendations, input capacitance, supply-current limits, or junction-temperature limits, so those values must be confirmed in the manufacturer datasheet before final release. This page synthesizes verified distributor and manufacturer information, cross-reference evidence, pricing information, package details, and practical interface-design guidance. It distinguishes confirmed values from unavailable technical parameters and avoids treating the web-search cross-reference suggestions as guaranteed drop-in replacements without package and pinout verification.
SP485EEN-L - 10Mbps Half-Duplex RS-485 IC | MaxLinear
The MaxLinear SP485EEN-L is a low-power, half-duplex RS-422 and RS-485 interface transceiver with a data rate of 10,000 kbps, enhanced ESD protection, and an 8-pin SOIC package. Its 4.75 V to 5.25 V operating supply supports conventional 5 V industrial and commercial equipment while the RS-485/RS-422 interface enables bidirectional communication over long, noise-prone differential buses. An RS-485 transceiver is an interface IC that converts logic-level transmit and receive signals into differential bus voltages. The SP485EEN-L combines one transmitter and one receiver in a half-duplex arrangement, so the driver and receiver share the same differential pair. In the hierarchy of electronic components, it belongs to interface ICs and specifically to the RS-485 transceiver family used for industrial automation, instrumentation, and building systems. The verified manufacturer information identifies a 4.75 V to 5.25 V supply range, operation from -40 C to +85 C, and enhanced ESD tolerance exceeding 15 kV using both the Human Body Model and the IEC1000-4-2 air-discharge method. The low-power architecture is intended to reduce system consumption, while enhanced ESD capability improves robustness in electrically noisy installations. A 10,000 kbps rate also supports communication rates commonly required by RS-485 equipment. The SP485E and SP481E family is designed as a half-duplex RS-422 and RS-485 interface with pin-to-pin compatibility with Exar SP481 and SP485 devices and other industry-standard implementations. The SOIC-8 package supports conventional surface-mount assembly. Because the device is half-duplex, firmware and external direction-control logic must prevent the transmitter and receiver from driving the bus simultaneously. Typical uses include industrial RS-485 links between controllers and sensors, factory automation equipment, remote instrumentation, building-control networks, and data-acquisition systems. The differential interface is particularly useful where ground-potential differences and external noise could impair a single-ended communication path. Its 10,000 kbps capability allows it to serve both moderate-speed control networks and faster point-to-point links. Designers should include bus termination, biasing, protection, and a controlled DE/RE direction sequence. The transmitter should be disabled while receiving, and enable pins should not be allowed to float. A termination resistor belongs at each end of the main bus segment rather than at every node, while transient protection may be added when the cable leaves a protected enclosure. This product page consolidates verified manufacturer information, distributor availability and pricing, package details, cross-reference candidates, and practical RS-485 design guidance. It also distinguishes documented drop-in candidates from package-compatible parts that still require datasheet verification before substitution.
SP485EEN-L/TR - 10Mbps Low-EMI RS-485 Transceiver | MaxLinear
The MaxLinear, Inc. SP485EEN-L/TR is a single half-duplex RS-422/RS-485 transceiver with one transmitter and one receiver, a maximum data rate of 10 Mbps, and an 8-pin SOIC package. Designed for low-power industrial communication, it operates from a 4.75 V to 5.25 V supply and combines a BiCMOS implementation with enhanced ESD protection. According to the available Exar-family documentation, ESD tolerance exceeds ±15 kV for both the Human Body Model and the IEC 61000-4-2 air-discharge method. These characteristics make it suitable for robust point-to-point and multidrop industrial serial links where low EMI, compact size, and reliable transient protection are important. 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.
SP485EEP-L - 5Mbps Half-Duplex RS-485 Transceiver | MaxLinear
The MaxLinear SP485EEP-L is a low-power, half-duplex RS-485 and RS-422 transceiver operating at up to 5 Mbps from a single 5 V supply, housed in an 8-pin PDIP package. It uses a BiCMOS process to combine low power consumption with high communication speed and enhanced electrostatic-discharge protection. 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.
SP485EMN-L - 10Mbps Low-Power RS-485 Transceiver | MaxLinear
The MaxLinear SP485EMN-L is a low-power, half-duplex RS-422/RS-485 interface transceiver with a 10,000 kbps data rate, enhanced ESD protection, and an 8-pin SOIC package. It operates from a 4.75 V to 5.25 V supply and is designed for bidirectional industrial data links requiring one driver and one receiver. Its enhanced low-EMI implementation and BiCMOS process support reliable communication over longer, noisy cable runs. An RS-485 transceiver is an interface IC that combines a differential line driver and differential receiver into a physical-layer component for balanced serial communication. The SP485 belongs to the RS-422/RS-485 interface hierarchy within the broader semiconductor and industrial communications market. Half-duplex operation means the driver and receiver share the same differential pair, allowing the connected device to transmit or receive, but not both simultaneously. Key features include support for both RS-422 and RS-485 protocols, operation across a 4.75 V to 5.25 V supply range, a maximum data rate of 10,000 kbps, and an industrial temperature range of -40°C to +125°C. The SP485EMN-L family also provides enhanced ESD tolerance of more than ±15 kV for both the human body model and the IEC 61000-4-2 air-discharge method, improving protection during cable connection and industrial installation. The BiCMOS architecture combines bipolar and CMOS characteristics to provide low-power operation without sacrificing data-rate performance. A single driver and single receiver support point-to-point and multidrop bus arrangements when the system includes the required biasing, termination, protection, and protocol controls. The low-EMI designation is particularly relevant to industrial environments where radiated emissions and cable transients can affect neighboring equipment. Typical applications include industrial serial buses, building automation controllers, factory data acquisition, remote sensor nodes, industrial gateways, and instrumentation links. The device can also bridge a legacy UART or microcontroller port to a balanced RS-485 network. Its wide temperature range and enhanced ESD performance make it suitable for equipment exposed to temperature variation and electrostatic discharge during field installation or maintenance. Designers should provide termination at both ends of the bus, bias the differential pair at one location, route the driver and receiver outputs as a balanced pair, and keep unprotected cable connectors away from sensitive logic. Supply and ground decoupling should be placed close to the IC. The half-duplex DE and /RE control functions must be sequenced so that the driver is disabled while the receiver remains active during bus turnaround. This product data combines verified distributor availability, package and electrical information, candidate drop-in comparisons, and practical implementation guidance. It is intended to help engineers evaluate the SP485EMN-L for industrial RS-485 designs, verify board compatibility, and identify the electrical and layout conditions needed for dependable field operation.
SP485EMN-L/TR - 5Mbps RS-485 Transceiver | MaxLinear
The MaxLinear SP485EMN-L/TR is a low-power, half-duplex RS-422/RS-485 line transceiver with one driver and one receiver, operating at data rates up to 5 Mbps in an 8-pin SOIC package. The device uses a BiCMOS architecture to combine low power consumption with RS-485 and RS-422 performance, while enhanced ESD protection supports industrial communication equipment exposed to electrostatic discharge. 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.
SP485EN-L - 5Mbps RS-485/RS-422 Transceiver | MaxLinear
MaxLinear SP485EN-L is a single half-duplex differential transceiver for RS-485 and RS-422 links, supporting data rates up to 5Mbps from a 4.75V to 5.25V supply in an 8-pin SOIC package. Its BiCMOS implementation combines low power with differential line-driver and receiver functions. 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.
SP485EN-L/TR - 5Mbps RS-485/RS-422 Transceiver | MaxLinear (Tape & Reel)
MaxLinear SP485EN-L/TR is a single half-duplex differential transceiver for RS-485 and RS-422 links, supporting data rates up to 5Mbps from a 4.75V to 5.25V supply in an 8-pin SOIC package. Its BiCMOS implementation combines low power with differential line-driver and receiver functions. 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/TR 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/TR. 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.
SP485ES-L 5Mbps RS-485 Transceiver | MaxLinear | 8-PDIP
The MaxLinear SP485ES-L is a single-channel, half-duplex RS-485 and RS-422 transceiver capable of operation up to 5000 kbps, supplied in an 8-pin plastic DIP package. The device combines one driver and one receiver with a BiCMOS design intended to provide low-power operation without sacrificing communication performance. Its differential bus pins support the physical layer used by industrial automation, instrumentation, building controls, and other long-distance serial networks. An RS-485 transceiver is an interface IC that converts logic-level data into a differential, balanced signal and converts received differential signals back into digital logic. The broader hierarchy is transceiver > serial interface > differential line interface > interface IC. RS-485 is commonly used for robust multidrop communication, while the SP485ES-L also supports RS-422 signaling as described by the manufacturer. Key features include a maximum data rate of 5000 kbps, a half-duplex 1/1 transceiver configuration, and an operating temperature range from -40 C to +85 C. The BiCMOS implementation combines bipolar and CMOS characteristics to support low-power operation. Because the device is half duplex, its driver and receiver share the bus connection and are controlled separately through DE and RE logic inputs. The SP485ES-L provides separate driver input, driver enable, receiver enable, and receiver output functions. This arrangement allows a design to disable the transmitter during reception, supporting bus turnaround in two-wire RS-485 networks. The exact differential input thresholds, output levels, supply current, driver impedance, receiver impedance, and protection ratings are not supplied in the retrieved source excerpts and therefore must be confirmed in the manufacturer datasheet before final circuit design. Typical uses include industrial RS-485 field buses, factory automation equipment, building automation controllers, data acquisition systems, motor-control interfaces, and embedded serial networks. The 5000 kbps capability makes the part suitable for relatively high-speed point-to-point or multidrop links where cable length, topology, termination, and transceiver slew rate remain compatible. Design with the SP485ES-L using a local 5 V supply only after checking the complete electrical limits in the datasheet. Place the transceiver close to the bus connector, provide the protection required by the installation environment, and apply termination and fail-safe biasing according to the selected bus topology. ESD and surge protection may require external components because the retrieved data does not establish the integrated protection rating. This page consolidates the verified package, speed, interface, temperature, sourcing, and cross-reference information with practical selection guidance. It also distinguishes the SP485ES-L from candidate drop-in devices and identifies electrical details that still require datasheet confirmation, providing more engineering context than a distributor listing alone.
SP485R - 1/10 Unit Load RS-485 Transceiver | MaxLinear
The MaxLinear SP485R is a low-power RS-485 differential transceiver offered in an 8-pin narrow SOIC or 8-pin plastic DIP package, designed as a pin-to-pin equivalent to the SP485 with significantly higher receiver input impedance. The part supports half-duplex communication with tri-state control and is intended for applications that require many nodes on a single twisted-pair bus, rated for over 400 transceivers per line due to its high-impedance differential receiver inputs (RIN approximately 120 kOhm to 150 kOhm typical). The SP485R operates from a single 5 V supply, delivers 5 Mbps signaling capability, and includes a low-power shutdown mode, making it suitable for industrial multi-drop networks, building automation, and long-cable installations. An RS-485 transceiver is a physical-layer interface IC that converts between a UART's TTL/CMOS logic levels and the differential voltage signaling required by the TIA/EIA-485 standard. The standard defines a half-duplex, multipoint differential bus capable of driving cables up to 1200 m at speeds up to 10 Mbps, with common-mode voltage tolerance up to 12 V and robust noise immunity. The 1/10 unit-load rating of the SP485R is a TIA/EIA-485 bus-loading metric meaning each receiver presents only 1/10 of one standard unit load, allowing roughly 10x more devices on the bus than the legacy 32-node limit. Transceivers such as the SP485R form a critical layer in the protocol stack, sitting between the UART/MAC and the physical copper medium in industrial fieldbus, Modbus RTU, PROFIBUS, and DMX512 systems. The SP485R's headline features are a 1/10 unit load (RIN approximately 150 kOhm typical), 5 Mbps data rate, half-duplex driver/receiver with tri-state control, 5 V single-supply operation, and an integrated shutdown pin for low-power idle states. Differential driver outputs swing the EIA-485-required 1.5 V minimum across a 54 Ohm load while maintaining reduced EMI through controlled slew rates. The architecture is a classic bipolar differential line driver and receiver pair with on-chip bandgap reference and thermal protection. The receiver's input hysteresis and high input impedance (at least 120 kOhm per datasheet) reduce bus loading and preserve signal integrity at high node counts. Thermal shutdown protects the output stage against bus faults such as shorts to ground or supply. Typical applications include industrial multi-drop networks, building automation, HVAC controls, security camera RS-485 links, utility metering, DMX512 lighting, and any design that must exceed the standard 32-node RS-485 limit without resorting to repeaters. The wide common-mode range (typically -7 V to +12 V) supports real-world installations with ground-potential differences. When designing with the SP485R, ensure proper termination (120 Ohm at both ends of the bus for long runs), biasing resistors if the bus is idle, and adequate decoupling (0.1 uF ceramic close to VCC). Be aware that the 1/10 unit load figure means up to 400 nodes are allowed only if all transceivers are also 1/10 unit-load rated - mixing standard and 1/10 unit-load parts breaks the math. This page synthesizes real distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
SP485RCN-L - 1/10-Unit-Load RS-485 Transceiver | MaxLinear
MaxLinear SP485RCN-L is a 1/10-unit-load RS-485 and RS-422 half-duplex transceiver with high receiver input impedance, a 4.75 V to 5.25 V supply range, and data rates up to 5 Mbps, housed in an 8-pin SOIC package. Its BiCMOS implementation supports low-power operation while preserving robust differential bus performance. An RS-485 transceiver is a physical-layer interface IC that combines a differential line driver and receiver on a balanced two-wire bus. The SP485 family supports RS-485 and RS-422 operation, while the SP485R high-fanout version raises receiver input impedance and can accommodate more than 400 transceivers on one transmission line without materially degrading the driver signal. The SP485RCN-L offers several practical benefits for industrial communication equipment. Its 1/10-unit-load receiver allows many devices to share the same bus without requiring a separate termination for every node. High receiver input impedance reduces loading in multi-drop networks, while the 5 Mbps maximum data rate supports both legacy industrial baud rates and faster point-to-point links. The SP485R architecture is described by the manufacturer as pin-to-pin equivalent to the original SP485 while adding high receiver input impedance and enhanced ESD tolerance. This makes it suitable for designs migrating from a conventional SP485 footprint when fan-out or transient robustness is important. The half-duplex arrangement allows the same differential pair to support transmission and reception, although direction control must be managed by the host logic. Typical applications include industrial PLC and factory automation links, building-control networks, instrumentation buses, motor-control equipment, security systems, and communications equipment that must place multiple transceivers on a single RS-485 segment. The 8-pin narrow SOIC package also supports compact board layouts where a higher-density interface solution would otherwise consume unnecessary area. Designers should use the manufacturer pin-description table when assigning PCB tracks, place the transceiver close to the connector, and apply suitable protection to the external bus. Termination, biasing, common-mode range, and isolation requirements must be evaluated together because the transceiver itself does not remove the need for correct bus topology and surge protection. This product data combines the SP485 family architecture, package information, manufacturer guidance, and drop-in comparison guidance to support faster schematic review, PCB-footprint validation, and sourcing decisions for industrial RS-485 and RS-422 interfaces.
SP485RCN-L/TR - 5Mbps RS-485 Transceiver | MaxLinear
MaxLinear SP485RCN-L/TR is a 5 Mbps half-duplex RS-485 and RS-422 interface transceiver with one transmitter and one receiver, a 4.75 V to 5.25 V supply range, and an 8-pin SOIC package. Its 1/10-unit-load receiver supports more than 400 transceivers on one transmission line, while the high-impedance receiver input helps preserve the driver signal in multi-node networks. An RS-485 transceiver is a bidirectional communications interface that combines a differential line driver and differential receiver on a single integrated circuit. RS-485 defines a physical layer for robust, multipoint, balanced digital data links, while RS-422 provides a related differential signaling system. These transceivers operate within the interface IC and data-communications hierarchy, converting between logic-level signals and balanced differential signals used by industrial, building, and telecommunications equipment. The SP485RCN-L/TR combines a 5 V BiCMOS implementation with operation at rates up to 5 Mbps. Key electrical features include a typical receiver input resistance of 150 kohm and support for more than 400 units on a single line. The device is intended for half-duplex communication, uses an 8-pin narrow SOIC package, and is supplied in tape-and-reel packaging. Its operating temperature range is 0 °C to 70 °C. The BiCMOS architecture combines bipolar and CMOS characteristics to provide low-power operation without sacrificing line-driver performance. Separate receiver and driver control inputs permit the design to select receive, transmit, or disabled operating states. This flexibility is useful when direction control is handled by a microcontroller, transceiver logic, or an automatic control circuit. The high receiver impedance is particularly valuable in large RS-485 networks where loading from many connected receivers could otherwise reduce bus signal amplitude. Typical uses include industrial RS-485 controllers, building-automation equipment, instrumentation links, motor-control systems, and communications between a host controller and distributed remote nodes. The 5 Mbps capability supports relatively fast short-distance balanced links, while the 1/10-unit-load receiver allows numerous devices to share a bus when cable length, topology, termination, and transceiver loading permit. Design the bus with correct differential routing, a termination strategy suited to the network topology, and protection appropriate for the installation environment. Keep the driver, receiver, and bypass-capacitor connections compact, and account for common-mode voltage and ground potential differences between remotely connected nodes. The MAX485ESA cross-reference page identifies direct drop-in options and notes that minor parametric differences may exist, so verify every replacement against the required data rate, unit load, and bus topology. This product page combines manufacturer-level interface characteristics, package and environmental information, drop-in replacement guidance, and practical network-design considerations. It helps engineers evaluate the SP485RCN-L/TR beyond basic catalog attributes and select a compatible replacement without changing the 8-pin PCB footprint.
SP485RCP-L - 1 Mbps RS-485 Transceiver | MaxLinear
The MaxLinear SP485RCP-L is a half-duplex RS-422/RS-485 interface transceiver with one driver and one receiver, a maximum data rate of 1 Mbps, and an 8-pin PDIP package. The device operates from a nominal 5.25 V supply and is specified for the 0°C to 70°C commercial temperature range, making it suitable for conventional industrial and legacy communications equipment. An RS-485 transceiver is a physical-layer interface IC that combines a differential line driver with a differential receiver. It belongs to the hierarchy of transceiver, interface IC, communications semiconductor, and semiconductor. RS-485 signaling supports robust point-to-multipoint data links over longer cable runs than single-ended logic interfaces, while RS-422 compatibility allows the same device to participate in compatible differential receiver networks. The SP485RCP-L provides a 1/1 driver-to-receiver configuration, allowing one transceiver to support bidirectional communication when the bus direction is controlled externally. Its 1 Mbps maximum signaling rate supports substantially faster communication than low-speed RS-485 devices. The commercial 0°C to 70°C temperature rating defines its intended operating environment, while the through-hole PDIP-8 package supports conventional PCB assembly and field-serviceable equipment. The transceiver separates the physical-layer data path from the digital logic interface used by a host controller. Direction control must be managed so that the driver and receiver do not contend on the bus. For half-duplex networks, the system commonly uses a receiver-enable or driver-enable signal to change the operating direction around a transmission request. Proper termination and biasing remain essential for dependable behavior on multidrop buses. Typical applications include industrial control links, instrument interfaces, point-of-sale equipment, building automation controllers, and factory data networks. The part is especially relevant when an existing board uses an 8-pin PDIP footprint and requires a direct RS-485/RS-422 interface upgrade without changing the mechanical layout. Its maximum data rate also suits moderate-speed supervisory and control channels rather than only slow telemetry links. Designers should verify logic thresholds, driver enable polarity, receiver fail-safe behavior, isolation needs, and bus-topology requirements before releasing a replacement design. A DIP package simplifies through-hole assembly, but it is larger than surface-mount alternatives. In long cables or noisy industrial environments, add appropriate transient protection, controlled grounding, and tested termination rather than relying on the transceiver alone for surge immunity. This page combines package, interface, temperature, and data-rate details with pin-compatible replacement guidance and practical PCB considerations. It is intended to help engineers determine whether SP485RCP-L fits an existing RS-485 design and to identify the checks required before approving a substitution.
SP485REN-L - 5Mbps RS-485 Transceiver | MaxLinear | SOIC-8
The MaxLinear SP485REN-L is a half-duplex RS-485 and RS-422 transceiver rated for data rates up to 5 Mbps and supplied in an 8-pin SOIC package. Its 1/10-unit-load receiver input enables more than 400 transceivers on one transmission line, while its 4.75 V to 5.25 V supply range supports conventional 5 V industrial communication systems. The SP485REN-L also provides high receiver input impedance, helping preserve the integrity of the driver signal when many nodes share a bus. An RS-485 transceiver is an interface IC that combines a differential line driver and differential receiver, allowing reliable bidirectional communication over long, electrically noisy interconnects. The SP485REN-L belongs to the RS-422/RS-485 interface hierarchy within the broader semiconductor and industrial-control markets. Its half-duplex architecture supports a shared differential pair through a direction-control input, making it suitable for multidrop buses, remote monitoring, factory automation, and building-control networks. The principal feature of the SP485REN-L is its low 1/10-unit-load receiver input. According to the manufacturer product information, this impedance permits more than 400 transceivers on a single transmission line without degrading the RS-485 driver signal. The device operates from a 4.75 V to 5.25 V supply, communicates at rates up to 5 Mbps, and supports an industrial temperature range of -40°C to 85°C. Its BiCMOS implementation combines low-power operation with high communication performance. The SP485REN-L uses a half-duplex arrangement in which the driver and receiver share differential bus terminals. A driver-enable control determines whether the device transmits, while a receiver-enable control determines whether the receiver is active. The high receiver impedance is particularly useful when numerous nodes must share one cable because it limits loading of the bus. This characteristic also distinguishes the SP485REN-L from the standard SP485 configuration for designs where node count is a primary constraint. Typical applications include industrial sensor networks, PLC-to-remote-I/O links, building automation equipment, telecommunications infrastructure, instrumentation, and industrial motor-control systems. A half-duplex implementation can connect a controller to distributed sensors over one twisted pair, while the 5 Mbps capability provides useful margin for moderate-speed industrial links and point-to-point backplanes. Designers should account for bus termination, fail-safe biasing, common-mode range, and cable length when integrating the transceiver. Place the transceiver close to the connector and route the differential pair as a balanced pair to minimize noise pickup. The external enable logic must also prevent driver contention, particularly during startup or fault-recovery conditions. This page combines device specifications, package and pin information, application guidance, drop-in alternatives, and practical interface-design considerations. It helps engineers compare bus loading, data rate, package compatibility, and protection requirements before assigning the SP485REN-L to a new RS-485 design.
SP485REN-L/TR - 5V RS-485/RS-422 Transceiver | MaxLinear
The MaxLinear SP485REN-L/TR is a 5 V half-duplex differential bus transceiver supporting RS-485 and RS-422 interfaces in an 8-pin SOIC package. It operates from 4.75 V to 5.25 V, supports data rates up to 5 Mbps, and is specified as a 1/1-unit-load transceiver for industrial-temperature applications. The device combines a push-pull differential driver and differential receiver in one package, allowing a single pair of interface ICs to support bidirectional half-duplex communication. An RS-485 transceiver is an interface IC that converts logic-level digital signals into balanced differential signals for reliable communication over longer, potentially noisy industrial buses. It belongs to the RS-485 and RS-422 transceiver category, within interface ICs and the broader semiconductor hierarchy. The SP485REN-L/TR is intended for systems that need standardized differential signaling, bus arbitration behavior, and a compact surface-mount implementation. Key features include support for both RS-485 and RS-422 operation, a maximum signaling rate of 5 Mbps, operation from a single 4.75 V to 5.25 V supply, and a high-impedance receiver arrangement identified by the REN designation. MaxLinear describes the SP485 and SP483 families as BiCMOS products designed to reduce power consumption without sacrificing performance. The industrial-temperature option and lead-free SOIC-8 package suit compact industrial control, instrumentation, and communications equipment. The REN variant provides higher receiver input impedance than the standard SP485 arrangement. A comparative manufacturer-family listing identifies the SP485REN-L as suitable for connecting more than 400 transceivers on one transmission line without degrading the RS-485 driver signal. This characteristic is useful in large multi-drop installations where many receiver nodes share a common bus, although cable length, topology, termination, and transceiver loading must still be evaluated together. Typical applications include industrial sensor networks, factory automation equipment, building-control interfaces, process instrumentation, and RS-485-to-serial bridges. At high data rates, cable type, connector transitions, grounding, and electromagnetic compatibility become increasingly important. At lower rates, longer cable runs may be practical, subject to the propagation delay and differential resistance limits of the selected cable and network topology. Designers should use the pin-description table and typical application circuit in the manufacturer datasheet when assigning PCB traces. Place the transceiver close to the bus connector, provide a solid ground reference, route the differential pair as a balanced pair, and avoid adding unnecessary stubs. Power-supply decoupling should be placed near the device, while external protection should be selected for the cable length, installation environment, and required surge withstand. This page organizes the confirmed electrical, package, application, and sourcing information for SP485REN-L/TR and adds practical guidance for bus layout, protection, compliance review, and drop-in replacement assessment. It distinguishes documented pin-compatible options from functionally similar devices that may require design verification before substitution.
SP485REP-L - 1/10 Unit Load RS-485 Transceiver | Exar
Exar Corporation SP485REP-L is a half-duplex RS-485/RS-422 transceiver with a 1/10 unit-load receiver input, a 4.75 V to 5.25 V supply, and an 8-pin plastic DIP package. It supports more than 400 transceivers on one transmission line and provides a typical receiver input impedance of 150 kOhm. Its 60 ns propagation delay and operating-temperature range from -40 C to +85 C make it suitable for industrial multipoint data links. An RS-485 transceiver is an interface IC that combines a differential line driver and differential receiver, allowing equipment to communicate reliably over noisy, long cable runs. The half-duplex arrangement means the driver and receiver share the same differential pair, with direction controlled by the design. As a universal bus transceiver, the SP485REP-L belongs to the interface IC hierarchy: bus transceiver, line transceiver, physical-layer interface, and communication semiconductor. The principal feature is its 1/10 unit-load receiver input. A lower unit load reduces the loading placed on a shared bus, while the specified typical input resistance of 150 kOhm helps preserve driver signal integrity. The result is support for more than 400 transceivers on a single transmission line. Half-duplex operation also reduces wiring complexity by sharing one bus pair rather than requiring separate transmit and receive pairs. The device operates from a regulated 4.75 V to 5.25 V supply and includes a propagation delay of 60 ns, according to the published SP485REP-L specifications. Its 8-pin plastic DIP package is intended for through-hole assembly and prototyping rather than compact automated surface-mount production. The -40 C to +85 C operating range provides useful environmental headroom for industrial control, instrumentation, and communications equipment. Typical uses include RS-485 field buses, industrial sensor networks, building automation equipment, remote monitoring stations, and data-acquisition systems. The high receiver impedance is particularly useful when many nodes share the same two-wire bus. Compared with a 1/8 or 1/4 unit-load transceiver, the 1/10 unit-load rating provides lower bus loading, while the trade-off is that the exact replacement must still match supply voltage, driver and receiver ratings, enable logic, and DIP pin mapping. Designers should verify the manufacturer's pinout and termination requirements before layout, and should use a proper RS-485 line network with controlled stub lengths. The DIP footprint requires through-hole clearances and adequate lead-bend spacing. Because the verified data does not include detailed absolute-maximum ratings, driver output levels, or full timing tables, those values should be obtained from the manufacturer datasheet before final release. This page consolidates the verified 1/10 unit-load, impedance, voltage, delay, temperature, package, pricing-directory, and replacement information with application guidance and package-conscious comparisons. It distinguishes confirmed facts from parameters that still require datasheet confirmation, helping engineers shortlist the SP485REP-L without overlooking PCB or bus-compatibility constraints.
SP490CN-L - 5Mbps RS-485/RS-422 Transceiver | MaxLinear
The MaxLinear SP490CN-L is a low-power BiCMOS differential line transceiver with one driver and one receiver, supporting RS-485 and RS-422 operation up to 5 Mbps in an 8-pin SOIC package. Its key electrical features include ±200 mV receiver input sensitivity, a wide receiver common-mode range, and 5 V supply operation. The SP490 is designed for industrial data links where low-power differential signaling and reliable noise immunity are important. An RS-485/RS-422 transceiver is an interface IC that combines a differential line driver and differential receiver into one package. The driver converts a logic signal into a balanced differential transmission, while the receiver converts the differential pair back into a logic signal. This interface class belongs to the broader hierarchy of interface ICs, communication transceivers, and semiconductor signal-conditioning devices used in industrial control, instrumentation, and point-to-point data systems. The verified manufacturer material identifies the SP490 as a low-power BiCMOS RS-485/RS-422 transceiver capable of operation to 5 Mbps. The receiver sensitivity is specified as ±200 mV, and the family is available in 8-pin plastic DIP and NSOIC packages. The SP491 is a related family member with additional driver and receiver tri-state enable lines, but it is not an interchangeable substitute for every SP490 design because its control-pin arrangement differs. The SP490CN-L is suitable for industrial communication links, data acquisition equipment, instrumentation, and embedded control systems using differential buses. Its 5 V supply simplifies integration with conventional 5 V logic systems, while the differential interface helps reject common-mode noise on longer cable runs. Designers must still account for termination, biasing, grounding, and protection-network requirements in the complete RS-485 or RS-422 interface. For PCB implementation, place the transceiver close to the connector and route the differential pair as a controlled-impedance pair with minimal stub length. Keep the ground reference continuous under the interface, use appropriate surge protection for exposed cabling, and verify that the receiver remains enabled or disabled as required by the bus architecture. The SP490CN-L datasheet is the authoritative source for electrical limits, pin assignments, and package details.
SP490CN-L/TR - 5Mbps RS-485/RS-422 Transceiver | MaxLinear (Tape & Reel)
The MaxLinear SP490CN-L/TR is a low-power BiCMOS differential line transceiver with one driver and one receiver, supporting RS-485 and RS-422 operation up to 5 Mbps in an 8-pin SOIC package. Its key electrical features include ±200 mV receiver input sensitivity, a wide receiver common-mode range, and 5 V supply operation. The SP490 is designed for industrial data links where low-power differential signaling and reliable noise immunity are important. An RS-485/RS-422 transceiver is an interface IC that combines a differential line driver and differential receiver into one package. The driver converts a logic signal into a balanced differential transmission, while the receiver converts the differential pair back into a logic signal. This interface class belongs to the broader hierarchy of interface ICs, communication transceivers, and semiconductor signal-conditioning devices used in industrial control, instrumentation, and point-to-point data systems. The verified manufacturer material identifies the SP490 as a low-power BiCMOS RS-485/RS-422 transceiver capable of operation to 5 Mbps. The receiver sensitivity is specified as ±200 mV, and the family is available in 8-pin plastic DIP and NSOIC packages. The SP491 is a related family member with additional driver and receiver tri-state enable lines, but it is not an interchangeable substitute for every SP490 design because its control-pin arrangement differs. The SP490CN-L/TR is suitable for industrial communication links, data acquisition equipment, instrumentation, and embedded control systems using differential buses. Its 5 V supply simplifies integration with conventional 5 V logic systems, while the differential interface helps reject common-mode noise on longer cable runs. Designers must still account for termination, biasing, grounding, and protection-network requirements in the complete RS-485 or RS-422 interface. For PCB implementation, place the transceiver close to the connector and route the differential pair as a controlled-impedance pair with minimal stub length. Keep the ground reference continuous under the interface, use appropriate surge protection for exposed cabling, and verify that the receiver remains enabled or disabled as required by the bus architecture. The SP490CN-L/TR datasheet is the authoritative source for electrical limits, pin assignments, and package details.