MAX1480CCPI+ - 250kbps Isolated RS-485/422 | Maxim Integrated
N.º de pieza: MAX1480CCPI+ ✓ ActivoMAX1480CCPI+ Descripción general
An RS-485/RS-422 transceiver is an interface IC that converts logic-level transmit and receive signals into balanced differential bus signals. The MAX1480 belongs to the broader isolated interface-IC hierarchy, where isolation provides a galvanic barrier between a communication bus and the controlling electronics. This helps protect systems from ground-potential differences and common-mode transients while supporting point-to-point and multidrop RS-485 or RS-422 communication networks.
The MAX1480CCPI+ uses a reduced-slew-rate driver to minimize electromagnetic interference and reduce reflected signaling on the bus. Its isolated outputs are stated to meet RS-485 and RS-422 specifications. Because one 5 V supply on the logic side powers both sides of the interface, the system does not require a separate isolated bus-side supply in the intended operating arrangement. The half-duplex architecture supports bidirectional communication over a shared differential pair when the application controls driver and receiver direction.
The MAX1480C family is implemented as a hybrid microcircuit in a 28-pin DIP package. The isolated interface integrates the physical-layer transceiver and isolation barrier rather than requiring a discrete optocoupler, transformer, and driver-receiver arrangement. This reduces component count and simplifies the physical isolation implementation, but designers must still account for creepage, isolation boundaries, bus termination, grounding, and protection requirements at the board level.
Typical uses include isolated RS-485 links in industrial controllers, HVAC and building-control networks, automated test equipment, local-area networks, and isolated data interfaces operating in EMI-sensitive environments. A 250 kbps data rate is suitable for moderate-speed supervisory, monitoring, and control traffic rather than the highest-speed industrial Ethernet protocols. The 28-pin through-hole DIP package also favors legacy, repairable, and industrial control-board designs.
When designing around the MAX1480CCPI+, place the device so its isolation boundary remains clearly defined, connect the logic ground and bus ground to their respective domains, and follow the bus-interface recommendations in the manufacturer datasheet. Termination, protection, and common-mode requirements depend on cable length, topology, and the external transceiver used. This page consolidates verified manufacturer and distributor information, drop-in alternatives, pricing, and practical selection guidance beyond a basic distributor listing.
Alternativas directas para MAX1480CCPI+ — 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 MAX1480CCPI+ (mismo factor de forma y huella) — difiere en Package, Product Type, Isolation, Driver Slew Rate, RoHS Status.
MAX1480ACPI+
✅ Sustitución directaConsulte el precio
Ver hoja de datos →MAX1480BCPI+
✅ Sustitución directaConsulte el precio
Ver hoja de datos →MAX1480CCPI+ Especificaciones
| Product Type | Isolated RS-485/RS-422 transceiver |
| Driver and Receiver Configuration | 1 driver and 1 receiver |
| Duplex Mode | Half duplex |
| Maximum Data Rate | 250 kbps |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Isolation | Galvanically isolated logic-side and bus-side interfaces |
| Driver Slew Rate | Reduced slew rate |
| Supported Standards | RS-485 and RS-422 |
| Encapsulado | 28-pin DIP, 0.600 in (15.24 mm) width |
| Tipo de montaje | Through-hole |
| Logic-Side Supply | Single 5 V supply powers both sides of the interface |
| Driver Count | 1 |
| Receiver Count | 1 |
| Estado RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
Guía de configuración de pines de MAX1480CCPI+ 28-pin dip, 0.600 in (15.24 mm) width
Configuración de pines para MAX1480CCPI+ (encapsulado 28-pin dip, 0.600 in (15.24 mm) width). 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 MAX1480CCPI+.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MAX1480CCPI+ es adecuado para 6 aplicacións: Industrial Control Networks, HVAC and Building Control, Automated Test Equipment, EMI-Sensitive Isolated Data Links, Local Area Bus Gateways, Remote Sensor and Actuator Networks.
Industrial Control Networks
The MAX1480CCPI+ fits isolated supervisory links between industrial controllers and field equipment because it combines one driver, one receiver, and a 250 kbps maximum data rate in a 28-pin DIP package. It is placed at the RS-485 or RS-422 boundary where the controller must communicate over a cable while remaining electrically separated from the bus. The reduced-slew-rate driver limits EMI and reflected signaling, while the single 4.5 V to 5.5 V supply simplifies the interface. Engineers should still verify the complete datasheet for common-mode limits, isolation rating, temperature range, termination, and transient protection before qualifying the part for an installation.
Recomendado
HVAC and Building Control
The MAX1480CCPI+ is applicable to HVAC and building-control networks that distribute commands and status over RS-485 or RS-422 wiring. Its 250 kbps data rate accommodates many monitoring and control messages, while electrical isolation helps the controller withstand ground-potential differences between building zones. The 28-pin DIP package is practical for through-hole industrial controllers and serviceable equipment. Using the reduced-slew-rate driver can improve EMI behavior around building wiring, but designers must maintain the isolation boundary, apply appropriate bus termination, and verify surge and ground-fault conditions against the complete manufacturer specifications.
Recomendado
Automated Test Equipment
The MAX1480CCPI+ can serve as the isolated communications interface in automated test equipment that must exchange RS-485 or RS-422 commands with external fixtures or instruments. Isolation reduces the risk of ground-potential interference between test-station electronics and remote equipment, while the 250 kbps rate supports moderate-speed control traffic. Its one-driver, one-receiver arrangement allows a half-duplex link when direction is managed by the test controller. Board layout must preserve creepage and isolation clearances, and the bus side should be checked for ESD, surge, and cable-length requirements that are outside the supplied excerpts.
Recomendado
EMI-Sensitive Isolated Data Links
The MAX1480CCPI+ is specifically suited to EMI-sensitive isolated data interfaces because its reduced-slew-rate driver minimizes electromagnetic interference and reflected bus signaling. The 250 kbps maximum data rate is appropriate for low- to moderate-speed data paths where predictable edges and reduced emissions are more valuable than maximum throughput. Its integrated isolation provides a galvanic barrier between the logic-side controller and the bus side. Layout should include short bus connections, controlled return paths, suitable protection, and verified isolation spacing; the reduced slew rate alone is not a substitute for a complete EMC-compliant interface design.
Recomendado
Local Area Bus Gateways
The MAX1480CCPI+ can provide the isolated physical interface on a gateway that bridges a host controller to an RS-485 or RS-422 local-area network. The half-duplex, one-driver and one-receiver arrangement supports shared-bus communication when the gateway controls transmit direction, and the 250 kbps rate suits supervisory and configuration traffic. The 28-pin DIP package supports repairable and legacy-style controller boards. Actual deployment requires checking the complete datasheet for bus-drive capability, timing, common-mode range, termination strategy, isolation rating, and environmental limits, because those details are not quantified in the supplied search excerpts.
Recomendado
Remote Sensor and Actuator Networks
The MAX1480CCPI+ can interface remote sensors and actuators in a wired monitoring system using RS-485 or RS-422 differential signaling. Isolation helps protect the local controller from ground shifts and common-mode disturbances encountered on field wiring, while the 250 kbps rate is adequate for many periodic measurement and command sequences. The reduced-slew-rate driver reduces EMI and reflected transitions on the bus. For long cables or industrial environments, engineers should add the required termination and surge protection and confirm the device’s common-mode voltage, isolation withstand, and environmental specifications from the complete manufacturer datasheet.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MAX1480CCPI+ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MAX1480ACPI+ | MAX1480BCPI+ |
|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 28-pin DIP | 28-pin DIP | 28-pin DIP |
| Product Type | Isolated RS-485/RS-422 transceiver | Isolated RS-485/RS-422 transceiver | Isolated RS-485/RS-422 transceiver |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Isolation | Electrically isolated | Electrically isolated | Electrically isolated |
| Supported Bus Standards | RS-485 and RS-422 | RS-485 and RS-422 | RS-485 and RS-422 |
Diferenciadores clave
- Complete isolation and differential interface integrated in one device (frente a MAX1480BCPI+)
- Confirmed 28-pin DIP family footprint (frente a MAX1480ACPI+)
- Reduced-slew-rate driver for lower EMI (frente a MAX1480ACPI+)
- Single logic-side supply architecture (frente a MAX1480BCPI+)
Notas de diseño
Preserve a continuous isolation barrier across the board rather than routing logic-side or bus-side copper beneath the transceiver. Keep bus traces short, use a solid ground reference on each side, and place any required protection close to the connector so surge current does not flow through sensitive circuitry. The supplied manufacturer material identifies the MAX1480 as an electrically isolated interface, but exact creepage, clearance, and isolation-body dimensions must be taken from the complete datasheet and package drawing.
Use the reduced-slew-rate driver as intended, but do not rely on it as the only EMI-control measure. Match differential pair geometry where practical, minimize stub lengths, place termination only where required by the bus topology, and route the pair away from switching nodes and clocks. The verified 250 kbps data rate helps constrain edge-rate-related emissions, yet cable length, connector construction, grounding, and shielding can determine practical EMC performance in the finished equipment.
Confirm direction-control logic before using the half-duplex interface because the device contains one driver and one receiver. Releasing the bus at the correct time prevents the driver from fighting another transmitter, while receiver enable should be managed to avoid unwanted echo or contention. Also verify common-mode voltage, isolation withstand voltage, temperature range, and external protection requirements from the complete datasheet; those values are not present in the supplied excerpts and should not be guessed.
Decouple the 4.5 V to 5.5 V logic-side supply at the device using the capacitor values and grounding arrangement specified in the manufacturer datasheet. The verified description states that one 5 V supply on the logic side powers both sides of the interface, so designers should not assume a conventional non-isolated transceiver layout. Keep high-current return paths away from the isolated bus-side reference and validate startup, supply tolerance, and power-sequencing requirements on the final board.
Información de cumplimiento
The supplied excerpts do not provide verified RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations for MAX1480CCPI+.
