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SP331CT-L - RS232/485 Programmable 4/4 Transceiver | MaxLinear
SP331CT-L

SP331CT-L - RS232/485 Programmable 4/4 Transceiver | MaxLinear

The MaxLinear SP331CT-L is a programmable 4-driver/4-receiver multi-protocol transceiver that supports RS-232, RS-422, and RS-485 interfaces from a single 5V supply, housed in a 28-pin SOIC package. It integrates four drivers and four receivers in a 28-SOIC footprint with on-board charge-pump capacitors required only on the RS-232 drivers, and supports data rates up to 10 Mbps in RS-485 mode. A multi-protocol transceiver is a single-chip device that consolidates several serial-communication physical layers (RS-232, RS-422, RS-485) into one IC so a design can reconfigure its port via pin straps or firmware to operate on different buses without changing the PCB. In the broader taxonomy, the SP331CT-L belongs to the line driver/receiver family, which sits inside interface ICs, which are a sub-class of integrated circuits (semiconductors). This consolidation reduces BOM count, simplifies qualification, and lets one hardware platform address multiple end-customer protocols such as Modbus RTU (RS-485), EIA-232 point-to-point links, and EIA-422 multi-drop networks. Key features include 4 drivers / 4 receivers, RS-232 charge pump integrated on-chip (no external capacitors for the RS-232 drivers), RS-485 data rate up to 10 Mbps, a self-test loopback mode that internally routes driver outputs back to the receiver inputs for board-level diagnostics, and a commercial 0°C to +70°C operating temperature range. The 28-SOIC (JEDEC MS-013) wide-body package simplifies hand-prototyping and rework compared to finer-pitch QFN alternatives. Technically, the SP331CT-L pairs a charge-pump doubler/inverter (using four small external capacitors) with bipolar RS-485/RS-422 transceivers; the protocol select pins program each channel pair for the appropriate slew rate and load. Enhanced ESD protection of ±15 kV per IEC 61000-4-2 (air discharge) is implemented on the bus pins, removing the need for external TVS arrays in many industrial enclosures. Typical applications include multi-protocol industrial serial ports, factory-automation PLCs, point-of-sale terminals, and instrumentation that must support both legacy RS-232 equipment and modern RS-485 multi-drop fieldbus networks. The loopback mode is particularly useful for production test and field diagnostics. When designing with this device, route the RS-485 bus traces as a 100 Ω differential pair with characteristic impedance matching and place the four charge-pump capacitors (typically 0.1 µF) as close as possible to the charge-pump pins to reduce radiated EMI and ensure the ±15 kV ESD rating is preserved. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes (charge-pump layout, protocol-pin programming, IEC 61000-4-2 ESD handling) that complement but go beyond what the manufacturer datasheet alone provides.

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SP334CT-L - Programmable RS-232/RS-485 Transceiver 28-SOIC | MaxLinear
SP334CT-L

SP334CT-L - Programmable RS-232/RS-485 Transceiver 28-SOIC | MaxLinear

The MaxLinear SP334CT-L is a programmable RS-232 and RS-485 transceiver IC integrating three drivers and five receivers in RS-232 mode and two drivers and two receivers in RS-485 mode, packaged in a 28-pin SOIC with single 4.75 V to 5.25 V supply. The device supports data rates up to 230 kbps in RS-232 mode and up to 5 Mbps (driver) in RS-485 mode, with slew-rate-limited drivers to minimize EMI on shared multipoint buses. A multi-protocol transceiver IC combines a UART/serial-port line interface that bridges an MCU's asynchronous logic-level serial port to industry-standard differential or single-ended physical-layer signaling used in industrial, point-of-sale, and embedded-networking equipment. The SP334 family sits in the broader Interface IC hierarchy (line transceiver > multiprotocol transceiver > serial interface > wired connectivity IC) and is commonly used to consolidate RS-232 and RS-485 ports onto one PCB footprint when both legacy and industrial buses must coexist. Key features include on-board charge-pump DC-DC converters that generate the +/- 5 V to +/- 10 V RS-232 levels from a single 5 V supply, true fail-safe receiver inputs on the RS-485 path (guaranteed logic-high output with open or shorted inputs), thermal-shutdown protection, and a hardware strap (pin 28 / SLP) that selects between RS-232 and RS-485 modes. The internal drivers use slew-rate control on the RS-485 side to limit harmonic content and reduce reflections on unterminated stubs. Driver and receiver enable pins allow half-duplex RS-485 direction control while preserving RS-232 simplex operation. The SP334 architecture uses a BiCMOS process that integrates charge-pump capacitors externally but keeps the charge-pump switching nodes, drivers, and receivers on the same die. This minimizes external component count to typically six 0.1 uF pump capacitors plus standard bypass. The RS-485 drivers meet the TIA/EIA-485-A differential output swing of at least 1.5 V across a 27 ohm load and the receiver thresholds follow the +/- 200 mV standard with the additional fail-safe bias. Typical applications include multi-drop RS-485 industrial fieldbus nodes, point-of-sale terminals that require RS-232 for legacy peripherals, factory automation controllers, and HVAC or building-automation gateways. Designers choose the SP334 when a single BOM line item must cover both a maintenance-port RS-232 connection and an RS-485 trunk to neighboring equipment. A key design consideration is the charge-pump capacitor selection: 0.1 uF ceramics with low ESR and at least 16 V rating are recommended. Pump frequency is typically 1 MHz; bypassing the V+ and V- pins with 0.1 uF plus 10 uF bulk capacitors improves RS-232 output symmetry under heavy load. The mode-select pin must be tied high or low and not left floating during operation. This page synthesizes distributor pricing, parametric drop-in alternatives, and application-level design notes not consolidated in the manufacturer datasheet, giving engineers a faster sourcing decision path for the SP334CT-L.

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SP335EER1-L/TR - Multiprotocol RS-232/RS-485/RS-422 Transceiver | MaxLinear
SP335EER1-L/TR

SP335EER1-L/TR - Multiprotocol RS-232/RS-485/RS-422 Transceiver | MaxLinear

The MaxLinear SP335EER1-L/TR is an advanced multiprotocol serial transceiver supporting RS-232, RS-422, and RS-485 standards in a single 32-pin QFN (5x5 mm) package with exposed thermal pad. The device integrates 1 driver / 1 receiver pair for RS-232 mode and 2 driver / 2 receiver pairs for RS-485/RS-422 mode, supporting data rates up to 1 Mbps in RS-232 and up to 20 Mbps in RS-485/422. It operates from a 3.0 V to 5.5 V single supply and requires only four external charge-pump capacitors. A multiprotocol transceiver is a single-chip interface IC that allows a UART, MCU, or FPGA to communicate over multiple serial standards (RS-232 single-ended, RS-422 differential, RS-485 half/full duplex) through one connector. Compared with dedicated transceivers, it eliminates external mode-switching FETs or relays, reduces BOM count, and enables a single PCB layout to serve multiple cable protocols. Multiprotocol transceivers belong to the broader category of line drivers / receivers within the wired-communication interface family. Key features include integrated 120 ohm cable termination (selectable via the TERM pin), a half/full duplex mode pin, mode selection between RS-485 and RS-232, internal charge pump for RS-232 driver voltage generation, and an exposed thermal pad for enhanced power dissipation. The device supports up to 32 transceivers on a single RS-485 bus and is offered in industrial -40 C to +85 C operating temperature range. The SP335EER1-L/TR uses a BiCMOS process with on-chip charge-pump regulators to generate the RS-232 +/-5 V output swing from a single 3.3 V or 5 V rail. The differential drivers in RS-485/RS-422 mode deliver a 1.5 V minimum differential output across 27 ohm load, supporting the TIA/EIA-485 standard. ESD protection on the bus pins exceeds +/-15 kV HBM (per the manufacturer datasheet, SP335E revision 1.02, 2017). Typical applications include multiprotocol industrial serial ports, point-of-sale terminals, building automation controllers, RS-232 to RS-485 protocol converters, and embedded communication modules that must interoperate with legacy and modern fieldbus equipment. The integrated termination and flexible mode control make it well suited for mixed-protocol field service equipment. When designing with this part, place the four charge-pump capacitors (typically 0.1 uF or 1 uF) as close to the C1+ / C1- / C2+ / C2- pins as possible. Use a solid ground plane beneath the exposed pad and stitch vias around the perimeter for thermal relief. Mode pin logic transitions should occur only when the drivers are disabled to avoid bus contention. This page synthesizes distributor pricing, drop-in alternatives, design notes, and parametric comparisons drawn from MaxLinear datasheets and DigiKey/Mouser/Octopart listings as of 2026-10-10.

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SP3485CN-L - 10Mbps 3.3V RS-485 Transceiver | MaxLinear
SP3485CN-L

SP3485CN-L - 10Mbps 3.3V RS-485 Transceiver | MaxLinear

The MaxLinear SP3485CN-L is a 3.3V low-power half-duplex RS-422/RS-485 transceiver with a 10 Mbit/s data rate, supplied in an 8-pin SOIC package. It combines one driver and one receiver, making it suitable for two-wire multidrop buses as well as point-to-point RS-422 links. The verified operating supply range is 3.135V to 3.465V, and the commercial temperature range is 0C to 70C. A transceiver integrates differential driver and receiver functions into one physical interface IC. An RS-485 transceiver converts logic-level TXD and control signals into balanced bus signals, then converts differential bus voltage back into RXD logic. Half-duplex operation means the bus transmits and receives at different times, while an enable or driver-control input determines when the driver is active. The SP3485 supports the electrical requirements of both RS-422 and RS-485 serial-interface protocols. Its 10,000 kbit/s capability supports industrial control, instrumentation, building automation, and general-purpose serial buses. Low 3.3V operation reduces supply requirements, while the half-duplex architecture limits the number of interface devices required at each node. The manufacturer identifies SP3485 devices as pin-compatible with SP481, SP483, and SP485 families. In a multidrop network, the transceiver converts the differential bus into a logic-level receiver output at each connected node. Designers must still verify network topology, termination, biasing, cable length, grounding, and protocol timing for the complete system. Bus direction control requires coordination in software or hardware so multiple nodes do not transmit simultaneously. Typical uses include RS-485 industrial links, RS-422 point-to-point communications, factory equipment, remote sensors, and embedded serial bridges. Its 8-SOIC package supports conventional surface-mount assembly and makes the device practical for compact communication interfaces where a low-voltage transceiver is preferred. PCB implementation should place the transceiver close to the connector, route the differential pair as a controlled-impedance pair, provide a continuous ground reference, and keep external protection components close to the bus entry. Verify all voltage, temperature, ESD, cable, and termination requirements against the manufacturer datasheet before releasing the production design. This page consolidates the verified distributor specifications, sourcing links, protocol context, and replacement considerations into one engineering reference while identifying parameters that still require manufacturer-datasheet confirmation.

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SP3485EN-L - 10Mbps 3.3V RS-485/RS-422 Transceiver
SP3485EN-L

SP3485EN-L - 10Mbps 3.3V RS-485/RS-422 Transceiver

The MaxLinear SP3485EN-L is a 3.3 V low-power half-duplex RS-485 and RS-422 transceiver with one driver and one receiver, a 10 Mbps data rate, and an 8-SOIC package. It is designed for serial links where low supply voltage, bidirectional communication, and compact PCB area are priorities. The verified manufacturer listing identifies SP3485 and SP3481 as members of the same +3.3 V transceiver family, while the distributor data identifies SP3485EN-L as an 8-SOIC half-duplex transceiver. A half-duplex transceiver is a physical-layer interface IC that shares one differential bus connection between a transmitter and receiver. The driver converts logic-level signals into a differential RS-485 or RS-422 output, while the receiver converts the differential bus voltage back into a logic signal. Direction control determines whether the integrated driver, receiver, or both paths are active on a shared bus. Key verified features include operation from a 3.135 V to 3.465 V supply, support for RS-485 and RS-422 serial protocols, a 10 Mbps data rate, and pin-to-pin compatibility claims for Exar SP481, SP483, and SP485 devices and popular industry standards. The MaxLinear page also describes the family as using BiCMOS technology for low-power operation without sacrificing performance. Additional electrical limits, protection levels, temperature range, and pin-level details were not present in the supplied evidence. Typical uses include industrial control links, building automation, instrumentation, gateways, embedded serial networks, and RS-422 point-to-point links. The 3.3 V supply makes the part suitable for systems where a modern low-voltage controller or transceiver is used. At 10 Mbps, trace routing, connector geometry, termination, and grounding become especially important; the bus should be treated as a controlled transmission-line environment rather than an arbitrary wire length. The principal design check is electrical compatibility with the intended bus. Confirm supply voltage, driver and receiver topology, direction-control logic, bus termination, fail-safe behavior, and transceiver pin mapping before layout release. The supplied snippets support the 3.135 V to 3.465 V supply and 10 Mbps data-rate claims, but they do not provide complete pinout, absolute-maximum-rating, or package-dimension tables. This product page consolidates manufacturer and distributor evidence, cross-reference findings, application guidance, and design cautions into a practical engineering reference. It does not invent missing electrical parameters and clearly identifies values that still require confirmation from the complete MaxLinear datasheet.

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SP3485EN-L/TR - 3.3V 10Mbps RS-485 Transceiver | MaxLinear
SP3485EN-L/TR

SP3485EN-L/TR - 3.3V 10Mbps RS-485 Transceiver | MaxLinear

The MaxLinear SP3485EN-L/TR is a 3.3 V low-power half-duplex RS-422/RS-485 transceiver with a 10 Mbps data rate, supplied in an 8-pin SOIC package. It combines one driver and one receiver in a single package and uses a BiCMOS process to provide low-power operation without sacrificing serial-link performance. The device is designed for bidirectional point-to-point or multipoint industrial communication links. An RS-485 transceiver is an interface IC that converts between differential digital signals and a logic-level UART or controller interface. RS-485 uses balanced differential signaling to improve noise immunity and allow communication over longer cable runs than single-ended logic. The SP3485 belongs to the broader serial-interface hierarchy: transceiver -> differential line driver and receiver -> communications IC -> semiconductor. Key features include compatibility with both RS-422 and RS-485 protocols, half-duplex operation, a 10 Mbps maximum data rate, and operation from a 3.3 V supply. The SP3485 family is also identified as pin-to-pin compatible with Exar SP481, SP483 and SP485 devices and popular industry standards. Its 8-SOIC format supports conventional surface-mount assembly and compact board layouts. The BiCMOS architecture combines bipolar and CMOS characteristics, supporting low power while maintaining high communication speed. Because the transceiver is half-duplex, the driver and receiver share the bus connection and direction is controlled by an external logic signal. The system designer must manage enable, bus idle state and turnaround timing to avoid contention. Typical uses include industrial automation equipment, building-control systems, instrumentation, data acquisition, motor-control interfaces and embedded serial bridges. The 3.3 V supply is well suited to modern controller platforms, while the differential bus can improve robustness in electrically noisy environments when implemented with proper cabling, termination and grounding. For PCB design, place the transceiver close to the bus connector and route differential pairs as a tightly coupled pair. Termination and bias resistors should be located where they can be configured or removed for the system topology. Decoupling should be placed close to the supply pins, and ESD protection should be selected to suit the connector environment. This product page consolidates verified distributor information, manufacturer family data and cross-reference findings. It distinguishes true pin-compatible alternatives from broader functional equivalents so engineers can shortlist parts without overlooking footprint, voltage or data-rate differences.

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SP3490EN-L/TR - 3.3V Full-Duplex RS-485/RS-422 Transceiver | MaxLinear
SP3490EN-L/TR

SP3490EN-L/TR - 3.3V Full-Duplex RS-485/RS-422 Transceiver | MaxLinear

The MaxLinear SP3490EN-L/TR is a 3.3V low-power full-duplex RS-485/RS-422 transceiver with 10 Mbps data rate in an 8-pin SOIC package. It integrates one driver and one receiver, supports supply voltages from 3.0V to 3.6V, and tolerates ±2 kV ESD on the bus pins per HBM-style contact discharge. The part draws a typical supply current of approximately 1 mA during operation and is qualified over the -40°C to +85°C industrial temperature range. An RS-485/RS-422 transceiver is a differential line driver/receiver IC that converts TTL/CMOS logic levels on the UART or controller side into balanced differential signals on a twisted-pair bus, enabling reliable multi-drop communication over long cable runs. SP3490EN-L/TR operates as a full-duplex link (separate driver output and receiver input pins), sits in the interface-IC family inside the broader signal-path taxonomy (transceiver -> line driver/receiver -> interface IC -> semiconductor). It interoperates with industry-standard 3.3V transceivers such as the MAX3485 and MAX3490, simplifying second-source qualification. Key features include driver slew-rate limited edges to control EMI, thermal-shutdown protection, short-circuit protection on the bus outputs, and a high-impedance shutdown mode (only on SP3491 variant; the SP3490 has permanently enabled driver/receiver paths). The BiCMOS process keeps quiescent current low while still supporting 10 Mbps signaling, which is significantly faster than legacy 2.5 Mbps RS-485 parts and sufficient for PROFIBUS, DMX512, and many industrial fieldbus extensions. Architecturally, the SP3490EN-L/TR uses a charge-pump to generate the higher rail needed for true RS-485 output swings from a single 3.3V supply, avoiding the dual +/-5V rails required by older generations. The receiver offers a 200 mV input hysteresis for noise immunity on long bus stubs. Typical applications include multi-drop RS-485 networks, point-to-point RS-422 links, DMX512 stage lighting, industrial PLC backplanes, and building-automation gateways requiring 3.3V-only logic compatibility. It is widely paired with low-power MCUs such as STM32 and ESP32 that operate natively at 3.3V. For robust bus design, use 120 Ω termination at both cable ends, place a 100 nF decoupling capacitor within 5 mm of the VCC pin, and ensure stub lengths remain under one-tenth of the driver's rise time at the data rate used. This page synthesizes distributor pricing, drop-in cross-brand equivalents, and PCB design notes that complement the manufacturer datasheet.

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SP3491EN-L - 3.3V Full-Duplex RS-485/422 Transceiver | MaxLinear
SP3491EN-L

SP3491EN-L - 3.3V Full-Duplex RS-485/422 Transceiver | MaxLinear

The MaxLinear SP3491EN-L is a +3.3V low-power full-duplex RS-485/RS-422 transceiver in a 14-pin SOIC (narrow) package, supporting data rates up to 10 Mbps. It integrates one driver and one receiver, supports 32 transceivers on the bus (1/8 unit load), and operates from a single 3.0V-3.6V supply. The device is pin-to-pin compatible with the MaxLinear SP490 and SP491 family and several industry-standard equivalents, enabling drop-in second-source replacement. According to the MaxLinear SP3490/SP3491 datasheet, the part uses a BiCMOS process for low power without sacrificing transient or ESD performance, and the SP3491 is qualified to +/-15kV HBM ESD on the bus pins. A transceiver in the RS-485/RS-422 category is a physical interface IC that converts between a single-ended UART/logic signal on the controller side and a differential signaling pair on the cable side, allowing reliable data transmission over twisted-pair copper cables up to 1200 meters. RS-485 and RS-422 are TIA/EIA standards that define differential voltage levels, common-mode range, and bus loading. Full-duplex transceivers use separate differential pairs for transmit and receive, enabling simultaneous bidirectional communication; this differs from half-duplex parts that share a single pair. RS-485/RS-422 belongs to the broader Interface ICs family, which sits under Integrated Circuits in the standard electronics taxonomy. Key features of the SP3491EN-L include 10 Mbps signaling, 1/8 unit-load bus loading (up to 32 nodes), +/-15kV HBM ESD on the bus pins, slew-rate-limited driver for reduced EMI, thermal shutdown protection, and short-circuit-proof driver outputs. The 14-SOIC package simplifies PCB layout with a familiar 150-mil wide body and standard JEDEC SO-14 land pattern, easing assembly and rework. The architecture combines a differential driver and differential receiver with hot-plug support and failsafe receiver design that guarantees a logic-high output when the bus is idle, open, or shorted. Combined with the low quiescent current, this makes the SP3491EN-L well suited to multi-drop industrial fieldbus networks where robust failsafe behavior is critical. Typical applications include industrial RS-485 fieldbus networks, factory automation and motor control, building automation (BACnet, Modbus), point-of-sale terminals, and any embedded UART-to-RS-485 bridge where 3.3V logic levels drive a long cable. When designing with this device, terminate the bus with 120 ohm resistors at both ends and keep stubs short to preserve signal integrity at 10 Mbps. Provide adequate decoupling (100 nF plus 1 uF) close to VCC, and consider slew-rate-limited variants if EMI is a concern.

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SP385EEA-L/TR - 3.3V/5V RS-232 Transceiver, 2x Driver/Receiver | MaxLinear
SP385EEA-L/TR

SP385EEA-L/TR - 3.3V/5V RS-232 Transceiver, 2x Driver/Receiver | MaxLinear

The MaxLinear SP385EEA-L/TR is a 2-driver / 2-receiver full-duplex RS-232 line transceiver that operates from a single 3.3 V or 5 V supply, supplied in a 20-pin SSOP (0.209 inch / 5.30 mm body width) package and shipped on tape and reel. The device supports data rates up to 120 kbps and conforms to EIA-232-D and V.28 specifications at 5 V, while also meeting EIA-562 (EIA/TIA-562) requirements at 3.3 V, enabling direct use in legacy RS-232 ports and newer 3.3 V MCU platforms without level translators. An RS-232 transceiver is a type of serial interface IC that translates logic-level (typically 0 V to VCC) UART signals on one side to the ±5 V to ±15 V single-ended voltage swings defined by the EIA-232 standard on the cable side. Transceivers sit at the physical-layer boundary of the data terminal equipment (DTE) / data circuit-terminating equipment (DCE) link, converting between the UART's CMOS/TTL domain and the higher-voltage cable domain so microcontrollers, FPGAs, or ASICs can communicate with PCs, modems, industrial controllers, and point-of-sale terminals. The SP385EEA-L/TR belongs to the SP200/SIPEX legacy family and is an enhanced, 3 V-capable upgrade of the original SP310A. Key features include on-board charge-pump DC-DC converters that generate the ±RS-232 driver supplies from a single logic rail, four external charge-pump capacitors (typically 0.1 µF), and an ON/OFF (shutdown) input that tri-states the drivers for power management. The receivers remain active during shutdown so they can monitor incoming data while the system is idle. Driver outputs are protected against ±15 kV of ESD using the Human Body Model, and the part is rated for commercial and industrial temperature ranges. Typical applications include battery-powered handheld terminals running from 3.3 V or 5 V single-rail supplies, industrial programmable logic controllers (PLCs), RS-232 ports on single-board computers and embedded MCUs, cable modem and set-top box control channels, point-of-sale / barcode scanner interfaces, and direct UART-to-DB9 front panels. The wide supply range (3.0 V to 5.5 V) lets a single BOM cover both 3.3 V MCU designs and legacy 5 V systems.

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SP485 - 5Mbps Low Power Half-Duplex RS-485 Transceiver | MaxLinear
SP485

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.

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SP485BN-L - 5Mbps RS-485/RS-422 Transceiver | Sipex
SP485BN-L

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.

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SP485CN-L - 5Mbps Half-Duplex RS-485 IC | MaxLinear
SP485CN-L

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.

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SP485CS-L - 5Mbps RS-485/RS-422 Transceiver | MaxLinear
SP485CS-L

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.

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SP485E - Enhanced Low Power Half-Duplex RS-485/RS-422 Transceiver | MaxLinear
SP485E

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.

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SP485ECN-L - 10Mbps Half-Duplex RS-485 Transceiver | MaxLinear (Tape & Reel)
SP485ECN-L

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.

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SP485ECN-L/TR - 10Mbps Half-Duplex RS-485 Transceiver | MaxLinear
SP485ECN-L/TR

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.

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SP485EEN-L - 10Mbps Half-Duplex RS-485 IC | MaxLinear
SP485EEN-L

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.

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SP485EEN-L/TR - 10Mbps Low-EMI RS-485 Transceiver | MaxLinear
SP485EEN-L/TR

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.

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SP485EEP-L - 5Mbps Half-Duplex RS-485 Transceiver | MaxLinear
SP485EEP-L

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.

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SP485EMN-L - 10Mbps Low-Power RS-485 Transceiver | MaxLinear
SP485EMN-L

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.

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SP485EMN-L/TR - 5Mbps RS-485 Transceiver | MaxLinear
SP485EMN-L/TR

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.

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SP485EN-L - 5Mbps RS-485/RS-422 Transceiver | MaxLinear
SP485EN-L

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.

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SP485EN-L/TR - 5Mbps RS-485/RS-422 Transceiver | MaxLinear (Tape & Reel)
SP485EN-L/TR

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.

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SP485ES-L 5Mbps RS-485 Transceiver | MaxLinear | 8-PDIP
SP485ES-L

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.

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