MAX3485ESA+ - 10Mbps RS-485/RS-422 Transceiver | Analog Devices
Référence : MAX3485ESA+ ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.96 | $2,96 |
| 10 | $2.75 | $27,50 |
| 100 | $2.35 | $235,00 |
| 500 | $1.95 | $975,00 |
| 1 000 | $1.65 | $1 650,00 |
| 3 000 | $1.45 | $4 350,00 |
MAX3485ESA+ Présentation
An RS-485/RS-422 transceiver is a physical-layer interface IC that converts logic-level digital signals into differential bus signals and receives differential bus signals back into CMOS-compatible logic. RS-485 supports multipoint, half-duplex communication, while RS-422 is commonly used for point-to-point, full-duplex links. The MAX3485 family combines a driver and receiver in one package to reduce board area and simplify interface implementation.
The MAX3485ESA+ is identified as a 3.3 V-powered, slew-rate-limited, true RS-485/RS-422 transceiver. The verified product information specifies a 10 Mbps data rate and an 8-SOIC package. The slew-rate-limited driver is intended to reduce unwanted signal transitions and improve communication behavior on practical differential buses. Each device contains one driver and one receiver.
The interface family is suitable for industrial control, instrumentation, data acquisition, building automation, and embedded communications where differential signaling helps reject common-mode noise. The MAX3485ESA+ can also support point-to-point RS-422 links, depending on the system wiring and termination arrangement. Its low-power 3.3 V operation is useful for compact equipment where supply current and bus-energy efficiency matter.
When designing a circuit, verify the exact pin functions, supply-voltage limits, driver enable logic, receiver output behavior, and termination requirements from the manufacturer datasheet before layout. RS-485 buses generally need correct biasing and termination at the physical endpoints; RS-422 links require termination appropriate to the selected topology. Never infer an alternate package or pinout from a distributor title alone.
This page consolidates the verified manufacturer product information, distributor listings, packaging data, and design-oriented guidance for engineers evaluating the MAX3485ESA+. It also distinguishes the part from functional alternatives that may require different packages, logic functions, or interface architectures.
Alternatives de remplacement direct pour MAX3485ESA+ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MAX3485ESA+ (même facteur de forme et même empreinte) — différant par Package, Unit Load, Duplex, Product Type, Supply Voltage (VCC).
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MAX3486EESA+T
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SP3485EN-L
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
XR3078XID-F
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX3485ESA+ Spécifications
| Product Type | RS-485/RS-422 transceiver |
| Tension d'alimentation | 3.3 V |
| Maximum Data Rate | 10 Mbps |
| Driver Count | 1 |
| Receiver Count | 1 |
| Supported Standards | RS-485 and RS-422 |
| Driver Architecture | Slew-rate-limited true transceiver |
| Boîtier | 8-pin SOIC |
| Type de montage | Surface mount |
| Power Class | Low-power transceiver |
| Production Status | PRODUCTION |
Guide de configuration des broches du MAX3485ESA+ 8-pin soic
Configuration des broches du MAX3485ESA+ (boîtier 8-pin soic). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour MAX3485ESA+.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MAX3485ESA+ convient pour 6 applications: Industrial RS-485 Control Bus, Point-to-Point RS-422 Link, Data Acquisition and Instrumentation, Building Automation and Environmental Monitoring, Embedded Serial Communication Module, Test Equipment and Remote Diagnostics.
Industrial RS-485 Control Bus
The MAX3485ESA+ fits a 3.3 V industrial controller that must communicate with remote actuators, sensors, or PLC modules over a differential bus. Its verified 10 Mbps capability and slew-rate-limited driver provide a practical foundation for reducing edge-rate effects on industrial wiring. The transceiver is used between the controller UART and the A/B bus pair, with the driver enable controlled by the application firmware. Designers must add the appropriate bus termination, biasing, grounding, and protection network, and must verify temperature, ESD, and surge requirements for the installation environment.
Recommandé
Point-to-Point RS-422 Link
The MAX3485ESA+ is appropriate for a point-to-point RS-422 link when the system needs a 3.3 V differential interface and a controlled, low-power transceiver. One driver and one receiver support the physical-layer signaling, while the verified 10 Mbps capability allows communication rates that exceed common low-speed serial links. The implementation depends on whether the link is full duplex or uses a single differential pair, and termination values must be selected from the cable impedance and topology. Verify the exact receiver and driver pin functions in the manufacturer datasheet before assigning enable and signal-routing logic.
Recommandé
Data Acquisition and Instrumentation
The MAX3485ESA+ can serve as the communication interface in a 3.3 V data-acquisition instrument that must transfer measurements between a controller, remote sensor, or laboratory peripheral. Differential signaling helps reject common-mode noise compared with a single-ended interface, while the verified slew-rate-limited, 10 Mbps specification supports short- and medium-length links when the bus is correctly terminated. Keep the transceiver close to the connector or cable entry, maintain a continuous ground reference, and place protection components where cable transients can enter the board. The complete measurement accuracy budget should also account for UART timing and receiver performance.
Recommandé
Building Automation and Environmental Monitoring
The MAX3485ESA+ is suitable for building-automation nodes that connect a low-voltage controller to distributed environmental sensors, dampers, or access-control modules. Its low-power, 3.3 V operation aligns with compact embedded equipment, and the RS-485/RS-422 interface supports robust differential communication over building wiring when the installation follows the required biasing and termination rules. A practical design should include a defined cable fault strategy, connector surge protection, and a power budget that accounts for the transceiver's operating states. Temperature and ESD ratings must be checked for the actual enclosure and cable environment.
Recommandé
Embedded Serial Communication Module
The MAX3485ESA+ is a practical interface stage for an embedded processor or microcontroller that exposes a 3.3 V UART to an external RS-485 or RS-422 connector. The verified one-driver/one-receiver arrangement keeps the physical layer compact, and the 10 Mbps rating provides margin for links that need more throughput than a slow asynchronous bus. Firmware must control driver direction so that the receiver is not subjected to an unintended transmit state, and the PCB must keep the differential pair geometry consistent. Add ESD protection at the connector and validate cable length and baud rate together.
Recommandé
Test Equipment and Remote Diagnostics
The MAX3485ESA+ can be used in compact test equipment or remote diagnostic hardware where a controller must exchange commands and status with an external instrument over a differential bus. The confirmed 3.3 V supply, 10 Mbps capability, and slew-rate-limited operation make it a useful building block for short-distance communication paths where lower EMI and controlled edge rates are desired. The system integrator must still verify the full electrical limits, fail-safe behavior, and environmental ratings from the datasheet. Use a defined termination strategy and avoid leaving unused transceiver inputs or outputs in an undefined state.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MAX3485ESA+ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MAX3486EESA+T | SP3485EN-L | XR3078XID-F |
|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC candidate |
| Brand | Maxim Integrated | Maxim Integrated | MaxLinear | MaxLinear |
| Product Category | RS-485/RS-422 transceiver | RS-485/RS-422 transceiver | RS-485 transceiver | RS-485 interface candidate |
Principaux différenciateurs
- 10 Mbps verified communication capability (vs SP3485EN-L)
- Dual RS-485 and RS-422 positioning (vs XR3078XID-F)
- Slew-rate-limited driver (vs MAX3486EESA+T)
Notes de conception
Place the MAX3485ESA+ close to the RS-485/RS-422 connector and route the differential pair as a controlled, impedance-consistent pair. Keep the driver, receiver, protection network, and termination components in the same signal path rather than spreading them across the PCB. This limits radiated emissions and improves the effectiveness of the slew-rate-limited edge control. Confirm the final layer stack, connector geometry, and grounding strategy against the system requirements.
Do not substitute a transceiver solely because its product description says RS-485. Verify the exact SOIC-8 pin map, supply voltage, data rate, receiver thresholds, enable polarity, ESD rating, and temperature range. SP3485EN-L is described by the verified cross-reference data as a functional equivalent and pin-compatible alternative, but it still requires manufacturer-level validation. A same-package candidate can differ in protection, fail-safe behavior, or logic timing even when the basic protocol is the same.
Use the correct bus biasing and termination network for the installed topology. Reflections and common-mode transients can degrade a differential link even when the transceiver itself is operating within its data-rate rating. Keep the ground reference continuous between connected equipment, use a common ground strategy appropriate to the RS-485 interface, and place ESD or surge protection at the connector entry. Validate edge rate, cable length, baud rate, and termination with an oscilloscope in the final mechanical enclosure.
Informations de conformité
The supplied verified data identifies the MAX3485 family as a 3.3 V, low-power RS-485/RS-422 transceiver in production, but it does not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. Compliance fields are therefore left unknown.