MAX3488ECPA+ - 12Mbps 3.3V RS-485/RS-422 | Analog Devices
N.º de pieza: MAX3488ECPA+ ✓ ActivoMAX3488ECPA+ Descripción general
An RS-485/RS-422 transceiver is a physical-layer interface IC that converts logic-level signals into balanced differential signals and receives differential signals back into logic-level data. The MAX3488E belongs to the transceiver hierarchy: transceiver > bus-line transceiver > differential interface IC > interface IC > semiconductor. Its dual differential implementation supports point-to-point RS-422 links as well as multi-drop RS-485 buses, subject to proper termination and biasing.
The device operates from a 3.3 V supply and supports data rates up to 12 Mbps. According to the supplied distributor and manufacturer data, the MAX3488ECPA+ provides ±15 kV ESD protection and slew-rate-limited operation. These characteristics are useful in industrial, instrumentation, and embedded communication systems where connector exposure, reflected bus signals, or electromagnetic interference could otherwise corrupt transmitted data.
The MAX3488E architecture combines one transmit channel with one receive channel in a single package. Slew-rate limiting controls the transition rate of the driver output, helping reduce unwanted high-frequency content on the bus. This is important in multi-drop RS-485 networks because the transceiver's edge rate directly affects signal integrity, electromagnetic emissions, and receiver performance.
Typical uses include industrial control links, RS-485 sensor buses, RS-422 point-to-point equipment links, building automation interfaces, test and measurement equipment, and industrial data acquisition systems. The 8-pin PDIP package is particularly useful for through-hole designs, prototypes, legacy control boards, and applications where a socketed or leaded package simplifies inspection and assembly.
A robust implementation must include correct bus termination, fail-safe biasing where required, grounding, and protection appropriate to the installation environment. Supply decoupling should be placed close to the IC, while the differential route should be kept short and symmetrical. Signal integrity and ESD performance depend on the complete board and cable system, not only on the transceiver specifications.
This product page consolidates the verified 3.3 V supply, 12 Mbps data rate, ±15 kV ESD protection, RS-485/RS-422 capability, PDIP-8 packaging, distributor pricing, and documented same-family alternatives. It also adds practical PCB guidance and explicit parameter comparisons to support sourcing and engineering decisions.
Alternativas directas para MAX3488ECPA+ — 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 MAX3488ECPA+ (mismo factor de forma y huella) — difiere en Driver Count, Receiver Count, Maximum Data Rate, Interface Standards.
MAX3488EEPA+
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Ver hoja de datos →MAX3488EEPA
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MAX3488EPA+
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Ver hoja de datos →MAX3488CPA+
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Ver hoja de datos →MAX3488ECPA+ Especificaciones
| Tensión de alimentación | 3.3 V |
| Maximum Data Rate | 12 Mbps |
| ESD Protection | ±15 kV |
| Supported Standards | RS-422/RS-485 |
| Transceiver Configuration | 1 transmitter and 1 receiver |
| Driver Type | Slew-rate-limited true RS-485/RS-422 |
| Receiver Type | Differential RS-422/RS-485 receiver |
| Encapsulado | 8-pin PDIP |
| Tipo de montaje | Through-hole |
| Tube Quantity | 1 tube |
Guía de configuración de pines de MAX3488ECPA+ 8-pin pdip
Configuración de pines para MAX3488ECPA+ (encapsulado 8-pin pdip). 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 MAX3488ECPA+.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MAX3488ECPA+ es adecuado para 6 aplicacións: Industrial RS-485 Control Bus, RS-422 Point-to-Point Equipment Link, Data Acquisition and Sensor Network, Building Automation Interface, Test and Measurement Instrumentation, Embedded Communication Controller.
Industrial RS-485 Control Bus
The MAX3488ECPA+ fits industrial control and factory automation buses that need reliable differential signaling from a 3.3 V controller. Its 12 Mbps maximum data rate supports high-speed telemetry, while the slew-rate-limited true RS-485/RS-422 driver helps control edge content on longer or multi-drop wiring. The ±15 kV ESD rating adds useful protection for equipment connected to external field wiring. In a half-duplex circuit, one MAX3488ECPA+ provides the driver and receiver needed to share a differential pair. Termination, fail-safe biasing, grounding, and surge protection must be designed around the actual bus length and environment.
Recomendado
RS-422 Point-to-Point Equipment Link
The MAX3488ECPA+ is appropriate for point-to-point RS-422 links between industrial controllers, remote I/O modules, and test equipment. The dual differential bus arrangement supports the full-duplex style of RS-422 communication, while the 3.3 V supply aligns with modern embedded processors. Its 12 Mbps capability provides ample bandwidth for command, status, and measurement data. Slew-rate-limited operation is valuable because it limits high-frequency edge content and can reduce EMI problems in cabinets containing clocks, switching supplies, and long cable routes. Cable length, termination resistance, common-mode limits, and grounding should still be verified against the complete interface specification.
Recomendado
Data Acquisition and Sensor Network
The MAX3488ECPA+ can connect a 3.3 V data-acquisition controller to remote sensors or measurement modules over an RS-485 bus. A 12 Mbps transceiver provides adequate throughput for continuous sampling, configuration data, and diagnostic packets, and the one-driver/one-receiver arrangement supports economical half-duplex bus nodes. The ±15 kV ESD protection is especially relevant when sensors are connected through user-accessible cables. For reliable operation, use a balanced cable, place termination only at the physical ends of the bus, and use biasing only where the transceiver requires fail-safe behavior. The complete system should also account for ground-potential differences between separately powered remote nodes.
Recomendado
Building Automation Interface
The MAX3488ECPA+ suits building automation controllers, HVAC equipment, lighting interfaces, and access-control nodes that use 3.3 V logic and RS-485 or RS-422 wiring. Its 12 Mbps capability allows compact controllers to support multiple communication functions, while the slew-rate-limited output improves compatibility with field cables carrying edges through building distribution panels. The ±15 kV ESD protection provides additional resilience for transceivers connected to longer external wiring. Installation engineers should plan termination and fail-safe bias at the network level, maintain a common reference where appropriate, and use additional surge protection for long cables or connections between buildings. This makes the device useful for both panel-mounted equipment and compact remote I/O modules.
Recomendado
Test and Measurement Instrumentation
The MAX3488ECPA+ is useful in test and measurement instruments that exchange commands and results with computers or remote fixtures over RS-485 and RS-422. Its 3.3 V operation suits compact embedded control sections, while 12 Mbps provides adequate transfer speed for status updates and instrument data blocks. The true differential transceiver architecture supports balanced connections that are less susceptible to common-mode interference than single-ended links. ESD protection is valuable when a user connects external leads to an instrument, although it does not replace a correctly coordinated surge-protection design. Engineers should use symmetrical routing, preserve the differential pair’s ground reference, and validate the maximum cable length and data rate together rather than treating 12 Mbps as a universal reach specification.
Recomendado
Embedded Communication Controller
The MAX3488ECPA+ provides a compact communication interface for embedded controllers, service modules, and communication adapters based on 3.3 V processors. The one-transmitter, one-receiver arrangement avoids duplicating two separate interface ICs in a half-duplex design, while the 12 Mbps rating permits high-speed command traffic and firmware data transfer. A PDIP package also simplifies through-hole prototyping and repair of legacy controller boards. In a practical layout, place the transceiver close to the connector or isolation barrier, provide local supply decoupling, and keep the balanced route away from switching nodes. System-level safeguards should include termination at appropriate cable ends, optional fail-safe biasing, and surge protection when the interface leaves the equipment enclosure.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MAX3488ECPA+ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MAX3488EEPA+ | MAX3488EEPA | MAX3488EPA | MAX3488CPA+ |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | PDIP-8 | PDIP-8 | PDIP-8 | PDIP-8 | PDIP-8 |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Maximum Data Rate | 12 Mbps | 12 Mbps | 12 Mbps | 12 Mbps | 12 Mbps |
| Supported Interfaces | RS-422/RS-485 | RS-422/RS-485 | RS-422/RS-485 | RS-422/RS-485 | RS-422/RS-485 |
| Transceiver Configuration | 1 transmitter and 1 receiver | 1 transmitter and 1 receiver | 1 transmitter and 1 receiver | 1 transmitter and 1 receiver | 1 transmitter and 1 receiver |
| Mounting Style | Through-hole | Through-hole | Through-hole | Through-hole | Through-hole |
Diferenciadores clave
- Direct same-family replacement path (frente a MAX3488EEPA+)
- High-speed differential interface (frente a MAX3488CPA+)
- Single-package bidirectional resource (frente a MAX3488EPA)
Notas de diseño
Place the MAX3488ECPA+ close to the bus connector or isolation boundary and route the differential pair as a short, balanced pair. The 12 Mbps rating makes trace symmetry and return-path continuity important because unequal impedance can shift differential timing and increase emissions. Keep the pair away from switching-power nodes and high-current edges. A solid ground plane beneath the pair is preferred, with connector-side protection located where the cable enters the board.
Use short, low-impedance supply and ground connections from the MAX3488ECPA+ to the local 3.3 V distribution network. Place the required bypass capacitor at the device supply pins with the shortest practical connection, and avoid sharing a narrow neck with bus-return current. The supplied data does not specify the recommended capacitance, ESR, or supply-current limits, so those values must be taken directly from the current manufacturer datasheet before layout release.
Do not assume that ±15 kV ESD protection eliminates the need for an external surge-protection strategy. ESD protection and surge protection address different stresses, and long field cables may also introduce ground-potential differences. Confirm whether the design needs galvanic isolation, add appropriate bus-side protection where required, and verify the fail-safe state. Likewise, do not infer the numbered pinout from generic MAX3488-family diagrams without checking the exact ordering code.
RS-485 termination belongs at the physical ends of a bus, not at every node, while fail-safe bias generally belongs at one defined location. Validate termination value, bias topology, stub length, cable type, and data rate together because a 12 Mbps transceiver does not guarantee reliable communication at every distance. For point-to-point RS-422, use the receiver termination required by the system and maintain symmetrical transmit and receive routing.
Información de cumplimiento
The supplied snippets do not provide verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. The plus suffix is present in the orderable MPN, but no compliance conclusion is inferred from that suffix.