MAX1480AEPI+ - Isolated RS-485/RS-422 Transceiver | Analog Devices
N.º de pieza: MAX1480AEPI+ ✓ ActivoMAX1480AEPI+ Descripción general
An isolated RS-485/RS-422 transceiver is an interface IC that transfers digital data between a logic system and a differential, multipoint or point-to-point communications bus. The transceiver hierarchy places this device within bus line transceivers, then interface ICs, semiconductors, and broader data-communication electronics. Galvanic isolation places a protective boundary between the logic-side circuitry and the external bus, helping limit fault-current and common-mode coupling into the host system.
The MAX1480AEPI+ combines the RS-485/RS-422 driver and receiver in one isolated 28-pin PDIP device. The verified distributor description identifies a one-transmitter, one-receiver, half-duplex configuration and a 250 kbps data rate. The 28-pin PDIP package also provides generous pin spacing compared with a surface-mount package, which can simplify prototype assembly, inspection, and rework. The manufacturer lists ATE, HVAC and building-control networks, industrial control, local-area networks, and isolated EMI-sensitive interfaces among its applications.
The half-duplex architecture allows the same bus driver to transmit and receive data at different times. Bus direction must therefore be managed by the host controller, while the transceiver handles conversion between the host's digital signals and the differential RS-485 or RS-422 bus. The isolated output structure is particularly relevant when the bus may experience ground-potential differences or where designers need to reduce the energy transferred from a bus fault into the local electronics.
Typical uses include industrial-control nodes, building automation equipment, automated test equipment, local-area networks, and isolated data links exposed to electromagnetic interference. The MAX1480AEPI+ is most appropriate when an external RS-485 or RS-422 bus, a 250 kbps-class data rate, and galvanic isolation are required in the same through-hole package. It is not a substitute for an RS-232-only transceiver, and its isolation should not be treated as a substitute for surge protection on an unprotected external cable.
The primary design consideration is the bus interface. The transceiver must be paired with correct termination, biasing, protection, and grounding practices for the selected RS-485 or RS-422 topology. Because the supplied data does not include complete electrical tables or a verified pin map, engineers should consult the official MAX1480A datasheet for pin names, isolation ratings, supply-current details, driver limits, and recommended external networks before releasing a production design.
This page combines verified manufacturer and distributor information, same-family drop-in candidates, a parameter comparison, and practical design cautions. It also distinguishes verified facts from parameters that remain to be confirmed from the manufacturer datasheet, making the MAX1480AEPI+ easier to evaluate for industrial and EMI-sensitive interface designs.
Alternativas directas para MAX1480AEPI+ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MAX1480AEPI+ (mismo factor de forma y huella) — difiere en Package, Data Rate, Operating Temperature, Product Type.
MAX1480AEPI
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MAX1480BEPI+
✅ Sustitución directaConsulte el precio
Ver hoja de datos →MAX1480BCPI+
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Ver hoja de datos →MAX1480ECCPI+
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MAX1480EAEPI+
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MAX1480AEPI+ Especificaciones
| Product Type | Isolated RS-485/RS-422 transceiver |
| Transmitter and Receiver Count | 1 transmitter and 1 receiver |
| Duplex Mode | Half-duplex |
| Velocidad de datos | 250 kbps |
| Supported Interfaces | RS-485 and RS-422 |
| Tensión de alimentación | +5 V on the logic side |
| Isolation Architecture | Electrically isolated |
| Encapsulado | 28-pin PDIP, 0.600 inch, 15.24 mm |
| Estilo de montaje | Through-hole |
| Logic-Side Supply Architecture | Single +5 V supply powers both sides of the interface |
| Application | Automated test equipment, HVAC and building-control networks, industrial control, local-area networks, and isolated EMI-sensitive data interfaces |
| Manufacturer Family | MAX1480A/B/C |
| Available Package Configuration | 28-pin DIP |
Guía de configuración de pines de MAX1480AEPI+ 28-pin dip
Configuración de pines para MAX1480AEPI+ (encapsulado 28-pin dip). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para MAX1480AEPI+.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MAX1480AEPI+ es adecuado para 6 aplicacións: Industrial Control Networks, HVAC and Building-Control Networks, Automated Test Equipment, Local Area Networks, EMI-Sensitive Data Interfaces, Remote Monitoring and Telemetry.
Industrial Control Networks
The MAX1480AEPI+ fits industrial-control links that require a 250 kbps RS-485 or RS-422 interface with electrical isolation between controller electronics and the field bus. Its one-transmitter, one-receiver, half-duplex arrangement allows a controller to exchange commands and status data with remote nodes over a differential bus. Isolation helps contain bus-side disturbances and ground-potential effects, while the 28-pin PDIP package supports straightforward prototype assembly. External surge protection, termination, and bias components remain necessary for a field-wired installation.
Recomendado
HVAC and Building-Control Networks
The MAX1480AEPI+ is appropriate for building-control equipment that links supervisory controllers to distributed HVAC and environmental-monitoring units. Its verified 250 kbps data rate is suitable for command and status traffic rather than high-bandwidth payload transfer, and the isolated bus side helps reduce coupling from electrical equipment and long building cables. Use the half-duplex mode with host-controlled driver direction, place protection at the connector or line interface, and verify termination against the actual cable length and node count.
Recomendado
Automated Test Equipment
The MAX1480AEPI+ can connect automated test equipment to external RS-485 or RS-422 instrumentation when galvanic isolation and a 250 kbps-class link are required. A half-duplex transceiver supports bidirectional command-and-response traffic without separate transmit and receive driver packages. Isolation may be useful when the fixture or instrument has a different ground reference from the tester, reducing the risk of direct ground-current paths. Designers should still account for tester bandwidth, cable reflections, termination, and connector-level transient protection.
Recomendado
Local Area Networks
The MAX1480AEPI+ supports moderate-speed local-area communication segments built around RS-485 or RS-422 differential signaling. Its 250 kbps data rate is applicable to supervisory, telemetry, and equipment-control networks where deterministic command exchange is more important than high throughput. Electrical isolation adds a useful boundary between bus-connected equipment and the host controller, especially in installations with multiple grounded systems. Confirm that the chosen family variant provides sufficient timing margin for the intended baud rate and bus topology.
Recomendado
EMI-Sensitive Data Interfaces
The MAX1480AEPI+ is appropriate for isolated data interfaces operating near electromagnetic interference, as identified on the manufacturer product page. Its electrically isolated bus outputs can provide a protective communication boundary while the differential RS-485 or RS-422 signaling improves common-mode rejection over the external cable. Isolation is only one part of a robust EMC design: use controlled edge rates, proper grounding, suitable cable, chassis or surge protection, and common-mode components selected from verified bus-protection requirements.
Recomendado
Remote Monitoring and Telemetry
The MAX1480AEPI+ can carry commands and periodic measurements between a central controller and remotely located sensors or monitoring modules. The 250 kbps class operation provides ample bandwidth for typical telemetry packets, while half-duplex operation conserves wiring and supports bidirectional communication over one differential pair. The isolated bus side is beneficial when monitoring equipment spans large ground-potential differences. Select termination and fail-safe biasing for the actual RS-485 topology, and isolate or protect external connectors where cables leave the enclosure.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MAX1480AEPI+ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MAX1480AEPI | MAX1480BEPI+ | MAX1480BCPI+ | MAX1480ECCPI+ | MAX1480EAEPI+ |
|---|---|---|---|---|---|---|
| Package | 28-pin PDIP | 28-pin PDIP - same | 28-pin PDIP - same | 28-pin PDIP - same | 28-pin PDIP - same | 28-pin PDIP - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Function | Isolated RS-485/RS-422 transceiver | Isolated RS-485/RS-422 transceiver | Isolated RS-485/RS-422 transceiver | Isolated RS-485/RS-422 transceiver | RS-485/RS-422 interface IC | RS-485/RS-422 interface IC |
| Mounting Style | Through-hole | Through-hole | Through-hole | Through-hole | Through-hole | Through-hole |
Diferenciadores clave
- A verified 250 kbps operating point (frente a MAX1480BEPI+)
- Through-hole 28-pin PDIP implementation (frente a MAX1480BCPI+)
- Complete isolated transceiver integration (frente a MAX1480ECCPI+)
- Half-duplex bus economy (frente a MAX1480EAEPI+)
Notas de diseño
Do not treat galvanic isolation as a substitute for surge protection. The MAX1480AEPI+ isolates the communications interface, but an external cable can still conduct lightning or industrial transients into the board. Place appropriately rated protection at the connector or line interface, keep the protection return path close to the cable shield, and confirm that the selected protection component is suitable for the bus-side supply arrangement. Also verify the official pinout before assigning supplies or isolation-side ground connections.
Keep the logic-side and bus-side copper regions separated according to the isolation barrier shown in the official package and layout guidance. Place bus-side decoupling and protection close to the transceiver pins and connector, while keeping high-current return paths away from sensitive logic traces. The 28-pin PDIP footprint provides space for routing and inspection, but good isolation-barrier clearance still depends on copper pours, mounting hardware, and creepage-controlled construction. Avoid connecting grounds across the isolation boundary unless the manufacturer explicitly permits it.
For RS-485, use termination and fail-safe biasing appropriate to the network topology rather than adding termination indiscriminately to every node. For RS-422, configure the source and receiver termination according to the official application guidance. The half-duplex driver must not be enabled during reception, so coordinate DE, RE, and bus-direction control in firmware. Verify timing margins using the selected MAX1480 family's propagation-delay and enable/disable data rather than relying only on the nominal 250 kbps rate.
Cable routing and edge rate strongly affect electromagnetic interference. If reflections or ringing are prominent, evaluate the reduced-slew-rate MAX1480B family candidate or another qualified device, but confirm that its timing still supports the required baud rate and protocol timing. Use twisted-pair cabling, controlled connector shields, common-mode protection where justified, and a defined chassis or signal-ground strategy. Compliance testing should be performed on the completed assembly because the transceiver alone does not determine system-level EMC performance.
Información de cumplimiento
The supplied verified results do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 status was not stated; the device is an industrial interface IC rather than an explicitly automotive-qualified product in the supplied evidence.
