MAX3490ESA+T - 10Mbps Full-Duplex RS-485/422 | Analog Devices
Teilenummer: MAX3490ESA+T ✓ AktivMAX3490ESA+T Übersicht
An RS-485/RS-422 transceiver is an interface IC that converts between single-ended logic-level signals and differential bus signals. Differential signaling reduces susceptibility to common-mode noise and allows reliable data transfer over longer cables. In the broader hierarchy, the MAX3490 belongs to the RS-485/RS-422 transceiver family within interface ICs and wired-communication semiconductors.
Key features include a 10Mbps maximum data rate, 3V to 3.6V supply operation, full-duplex communication, and an integrated driver and receiver. The manufacturer describes the MAX3483, MAX3485, MAX3486, MAX3488, MAX3490, and MAX3491 as 3.3V low-power transceivers for RS-485 and RS-422 communication. These devices support industrial-control, instrumentation, data-acquisition, and factory-automation links where robust differential signaling is required.
The MAX3490 provides separate transmit and receive paths for full-duplex operation, allowing the transmitter and receiver to remain active simultaneously. Its 8-SOIC surface-mount package supports compact PCB layouts, while the 3.3V supply simplifies interfacing with modern microcontrollers, field-programmable gate arrays, sensors, and industrial controllers. The exact receiver enable, driver enable, and bus-failover behavior should be confirmed against the manufacturer datasheet for the specific ordering variant before schematic sign-off.
Typical applications include full-duplex RS-485 links between industrial controllers and remote I/O modules, point-to-point RS-422 interconnects in test equipment, factory-floor sensor networks, and embedded control systems. Compared with half-duplex transceivers that multiplex the driver and receiver onto the same bus pins, a full-duplex implementation can simplify timing and remove the need for software-managed bus turnaround.
Designers should account for bus termination, fail-safe biasing, cable length, and grounding when using the MAX3490ESA+T. Differential buses normally require termination resistors at both ends of the cable, while bias resistors may be required to keep the bus in a defined state when no driver is active. Decoupling capacitors should be placed close to the supply and ground pins, and unused inputs should not be left floating.
This page consolidates manufacturer product information, distributor pricing references, verified substitute candidates, pin-level guidance, and practical RS-485 design notes into one engineering-oriented resource. It also identifies which same-package alternatives are documented as pin-compatible replacements and where additional manufacturer verification is required.
Drop-in-Alternativen für MAX3490ESA+T – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit MAX3490ESA+T (gleiche Bauform und Footprint) – abweichend in Package, RoHS Status, Data Rate, REACH Status, Supply Voltage.
MAX3490EESA+T
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MAX3490CSA+T
✅ Drop-InPreis auf Anfrage
Datenblatt ansehen →MAX3490ECSA+T
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MAX3490ESA+T Technische Daten
| Product Type | RS-485/RS-422 transceiver |
| Transceiver Configuration | 1 driver, 1 receiver |
| Communication Mode | Full duplex |
| Maximum Data Rate | 10 Mbps |
| Supply Voltage Range | 3 V to 3.6 V |
| Nominal Supply Voltage | 3.3 V |
| Logic Compatibility | 3.3 V transceiver |
| ESD Protection | ±15 kV |
| Gehäuse | 8-SOIC |
| Package Type | SOIC-8 |
| Montageart | Surface mount |
| Betriebstemperatur | -40 °C to +85 °C |
| Automotive Grade | Not applicable |
| RoHS-Status | Compliant |
| REACH Status | Compliant |
| Order Code | MAX3490ESA+T |
| Shipping Format | Tape and reel |
MAX3490ESA+T Pin-Konfiguration
| Pin 1 | RO — Receiver output |
| Pin 2 | RE — Receiver enable input |
| Pin 3 | DI — Driver input |
| Pin 4 | GND — Ground |
| Pin 5 | Y — Non-inverting driver output |
| Pin 6 | Z — Inverting driver output |
| Pin 7 | B — Inverting receiver input |
| Pin 8 | VCC — Positive supply voltage |
Typische Anwendungen
MAX3490ESA+T ist geeignet für 6 Anwendungs: Industrial Controller RS-485 Links, Factory Sensor and Actuator Networking, Test and Measurement Instrumentation, Data Acquisition and Remote Monitoring, Embedded Equipment Backplane Communication, Building and Environmental Control Systems.
Industrial Controller RS-485 Links
The MAX3490ESA+T fits full-duplex industrial control links because it combines a 3.3V supply range with a 10 Mbps maximum data rate in an 8-SOIC package. One driver and one receiver provide simultaneous transmit and receive paths, removing the software-controlled bus turnaround required by half-duplex designs. It can connect a controller to a remote I/O module over a point-to-point differential cable. Installation still requires correct termination and grounding, while the -40 °C to +85 °C grade suits industrial equipment with an extended ambient range.
Empfohlen
Factory Sensor and Actuator Networking
The MAX3490ESA+T is suitable for distributed factory sensor and actuator networks that use point-to-point full-duplex RS-485 wiring. Differential signaling reduces the influence of common-mode industrial noise compared with a single-ended interface, while the 10 Mbps rate supports high-rate status and measurement traffic. The 3.3V operation reduces the need for level translation beside 3.3V sensors and controllers. For installations spanning large buildings, engineers should verify cable length, bus topology, shield grounding, and surge-protection requirements.
Empfohlen
Test and Measurement Instrumentation
The MAX3490ESA+T can connect laboratory and industrial test equipment over a dedicated RS-422 link because it supports full-duplex operation, differential transmission, and rates up to 10 Mbps. Simultaneous transmit and receive capability simplifies control-and-response protocols without shared-bus contention. Its surface-mount SOIC package is compact enough for multichannel instrument front ends, although each link still needs suitable cable termination. The 3.3V supply also allows direct interfacing with modern FPGA and microcontroller logic when their I/O thresholds are compatible.
Empfohlen
Data Acquisition and Remote Monitoring
The MAX3490ESA+T is appropriate for remote data-acquisition modules that send sensor readings and receive configuration commands over a full-duplex differential link. Its 10 Mbps capability provides ample bandwidth for periodic telemetry while the one-driver/one-receiver architecture supports simultaneous command traffic. Operation from 3 V to 3.6 V simplifies integration with low-power embedded controllers. Designers should use biasing where required to maintain a defined idle state and should verify ground-potential differences across separately powered field installations.
Empfohlen
Embedded Equipment Backplane Communication
The MAX3490ESA+T can serve as the point-to-point communication interface between an embedded processor and a backplane controller. A 10 Mbps differential link provides a practical balance between throughput, EMI behavior, and implementation complexity, while full-duplex operation allows command and telemetry traffic to coexist. The 8-SOIC footprint supports compact, high-density layouts and the 3.3V supply aligns with modern processors. The design must still observe receive-versus-drive control sequencing and use a compatible connector or backplane termination scheme.
Empfohlen
Building and Environmental Control Systems
The MAX3490ESA+T fits building-control and environmental-monitoring equipment that uses full-duplex RS-485 links between controllers, thermostats, and remote sensors. Its 10 Mbps rate handles frequent status updates, and differential signaling improves robustness in environments containing motors, lighting, and switching power supplies. The -40 °C to +85 °C operating range covers many industrial and building-equipment environments, while the 3.3V supply simplifies mixed-signal designs. Long cable runs still require proper surge protection, common-mode consideration, and correct termination.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MAX3490ESA+T – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MAX3490EESA+T | MAX3490CSA+T | MAX3490ECSA+T |
|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Maximum Data Rate | 10 Mbps | 12 Mbps | 10 Mbps | 10 Mbps |
| Supply Voltage | 3 V to 3.6 V | 3 V | 3 V | 3 V |
| Transceiver Configuration | 1 driver, 1 receiver | 1 driver, 1 receiver | 1 driver, 1 receiver | 1 driver, 1 receiver |
| Communication Mode | Full duplex | Full duplex | Full duplex | Full duplex |
| Operating Temperature | -40 °C to +85 °C | Grade-specific, verify manufacturer data | Grade-specific, verify manufacturer data | Grade-specific, verify manufacturer data |
| Mounting Type | Surface mount | Surface mount | Surface mount | Surface mount |
Wichtigste Unterscheidungsmerkmale
- Documented 10 Mbps operating point with full-duplex operation (vs. MAX3490EESA+T)
- Same verified package and transceiver architecture for orderly substitution (vs. MAX3490CSA+T)
- Low-power 3.3V integration with modern embedded logic (vs. MAX3490ECSA+T)
Designhinweise
Do not treat a shared-package RS-485 IC as automatically interchangeable. The MAX3490 is a full-duplex part, while several MAX348x family members are half-duplex and combine driver-enable and receiver-enable functions on a shared pin. Confirm the exact pin table, enable polarity, and bus topology before substituting a related family member. For the listed MAX3490 grade variants, verify the ordering code and temperature range in the manufacturer data.
Apply differential termination and biasing for reliable operation on cables. Place the termination resistor across the bus at each physical end rather than at every node, and add fail-safe bias only where needed to establish a known state during idle periods. Route Y/Z and A/B as a tightly coupled differential pair, minimize stub lengths, and keep the transceiver and termination network close to the connector to reduce reflections and radiated emissions.
Place the device-supply decoupling capacitor immediately across VCC and GND, with its ground connection using the shortest return path available. Keep the SOIC footprint and assembly compatible with the selected manufacturer ordering variant. If the RS-485 connector is exposed to user-accessible cables, add appropriately rated surge and ESD protection rather than relying only on the transceiver's internal protection. Validate creepage, clearance, and isolation strategy for the final installation.
Compliance-Informationen
The supplied comparison data identifies the MAX3490ESA+ family as RoHS and REACH compliant. No verified AEC-Q100 qualification, halogen-free statement, or conflict-minerals declaration was provided for this ordering variant.
