MAX3070EAPD+ - 3.3V 250kbps RS-485/422 Transceiver | Analog Devices
Référence : MAX3070EAPD+ ✓ ActifMAX3070EAPD+ Présentation
An RS-485/RS-422 transceiver is an interface integrated circuit that converts logic-level signals into differential bus voltages and converts received differential signals back into CMOS-compatible logic. These differential interfaces belong to the broader serial-interface IC and industrial-communication hierarchy. Their common-mode tolerance, noise immunity, and fault-safe thresholds help preserve data integrity across cables, connectors, motors, automation equipment, and industrial controllers.
The MAX3070EAPD+ operates from a 3.3V supply and combines several protection-oriented features in one transceiver. Its ±15kV ESD rating supports robust connection to external equipment, while fail-safe receiver circuitry provides defined behavior during bus idle, driver disconnect, or shorted-driver conditions. Hot-swap operation permits the device to join a live bus without disruptive initialization, making it useful in systems with removable or field-serviceable communication modules.
This member of the MAX3070E through MAX3079E family combines a one-driver, one-receiver arrangement with full RS-485 and RS-422 operation. The 250kbps maximum signaling rate suits moderate-speed control and monitoring links rather than high-bandwidth storage or video networks. Differential signaling reduces susceptibility to common-mode noise relative to single-ended implementations, especially on industrial cables routed near motors, relays, and switching power equipment.
Typical uses include industrial automation controllers, programmable-logic-crane controllers, building-control equipment, instrumentation, motor-control interfaces, and isolated or non-isolated industrial data links. The transceiver can also bridge legacy controller UART signals to differential RS-485 equipment. Because the device provides both transmit and receive paths, a full-duplex connection requires two differential pairs and separate driver-enable and receiver-enable control according to the bus architecture.
PCB design should preserve controlled differential impedance, minimize stub lengths, and keep the transceiver close to the connector. Place protection devices near the external interface, provide local supply decoupling, and route the logic ground cleanly to the bus-return path. Verify termination, biasing, and enable sequencing against the cable length, node count, and topology used by the target network.
This product reference combines the exact MAX3070EAPD+ ratings, package information, interface role, application guidance, drop-in family alternatives, and engineering-focused comparison points to support faster component selection, PCB implementation, and sourcing decisions.
Alternatives de remplacement direct pour MAX3070EAPD+ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
MAX3071EAPD+
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MAX3072EAPD+
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MAX3073EAPD+
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MAX3074EAPD+
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MAX3075EAPD+
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MAX3070EAPD+ Spécifications
| Product Type | RS-485/RS-422 transceiver |
| Tension d'alimentation | 3.3 V |
| Maximum Data Rate | 250 kbps |
| ESD Protection | ±15 kV |
| Interface Standards | RS-485 and RS-422 |
| Transceiver Configuration | 1 driver and 1 receiver |
| Duplex Mode | Full duplex |
| Fail-Safe Receiver | Yes |
| Hot-Swap Support | Yes |
| Boîtier | 14-pin PDIP |
| Type de montage | Through-hole |
Guide de configuration des broches du MAX3070EAPD+ 14-pin pdip
Configuration des broches du MAX3070EAPD+ (boîtier 14-pin pdip). 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 MAX3070EAPD+.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MAX3070EAPD+ convient pour 6 applications: Industrial Automation Controllers, Programmable Logic and Crane Control, Building Control and HVAC Equipment, Instrumentation and Test Equipment, Motor Control and Condition Monitoring, Remote Sensor and Telemetry Links.
Industrial Automation Controllers
The MAX3070EAPD+ fits controller-to-controller and controller-to-module links that require a 3.3V differential RS-485 or RS-422 interface. Its one-driver/one-receiver arrangement supports full-duplex communication, while the 250kbps rate is appropriate for parameter updates, commands, and diagnostic status. The ±15kV ESD protection is especially useful where field cables connect through accessible industrial connectors. Use controlled differential routing, proper bus termination, and defined enable sequencing so that normal traffic, idle states, and fault recovery remain predictable.
Recommandé
Programmable Logic and Crane Control
Programmable-logic and crane-control equipment often distributes commands over long cable runs where common-mode noise and electrostatic discharge threaten signal integrity. The MAX3070EAPD+ provides a differential 250kbps RS-422 or RS-485 path with ±15kV ESD protection, fail-safe receiver behavior, and hot-swap support. These functions allow a controller UART to connect to remote modules without exposing the logic side directly to the field bus. Keep the differential pair impedance consistent, minimize stubs, and separate transceiver and protection components from high-current switching paths.
Recommandé
Building Control and HVAC Equipment
The MAX3070EAPD+ is suitable for building-control networks carrying configuration commands, sensor readings, and equipment status at rates up to 250kbps. Differential RS-422 or RS-485 signaling improves noise immunity over long, unshielded or lightly shielded cable routes, while fail-safe receiver operation helps define the logic state when a device is disconnected. The 3.3V operating supply simplifies integration with embedded controllers. Select termination and biasing for the installed cable length, and provide surge protection at the building-side connector where cables leave the enclosure.
Recommandé
Instrumentation and Test Equipment
The MAX3070EAPD+ can connect laboratory instruments, remote sensors, and automated test fixtures through a 3.3V RS-485 or RS-422 port. Its 250kbps limit is well suited to command and measurement traffic, while the full-duplex arrangement permits simultaneous control and monitoring when the wiring provides two differential pairs. The ±15kV ESD rating improves robustness at exposed ports, and fail-safe behavior assists system diagnostics after cable or peripheral faults. Keep instrumentation grounds and bus returns organized to avoid injecting measurement noise into the differential receiver.
Recommandé
Motor Control and Condition Monitoring
Motor-drive and condition-monitoring systems often place communication transceivers near noisy power stages, relays, and motor wiring. The MAX3070EAPD+ provides differential 250kbps signaling with ±15kV ESD protection and a fail-safe receiver, helping preserve controller commands when environmental noise or an unplugged sensor is present. Its 3.3V supply supports embedded logic integration. Place the transceiver near the external connector, maintain a continuous return path, and separate it from motor-current switching nodes; add appropriately rated surge protection for cables extending beyond the cabinet.
Recommandé
Remote Sensor and Telemetry Links
The MAX3070EAPD+ supports remote sensor nodes that transmit periodic measurements and accept configuration commands over a 3.3V differential bus. A 250kbps data rate is sufficient for many telemetry systems and reduces bandwidth demands compared with faster communication links. Fail-safe receiver behavior helps the host identify an inactive or disconnected node, while hot-swap capability supports field-serviceable modules. Maintain consistent trace geometry across the board-to-board and cable portions of the interface, and avoid long unterminated branches on multidrop networks.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MAX3070EAPD+ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MAX3071EAPD+ | MAX3072EAPD+ | MAX3073EAPD+ | MAX3074EAPD+ | MAX3075EAPD+ |
|---|---|---|---|---|---|---|
| Package | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| ESD Protection | ±15 kV | ±15 kV | ±15 kV | ±15 kV | ±15 kV | ±15 kV |
| Interface Standards | RS-485 and RS-422 | RS-485 and RS-422 | RS-485 and RS-422 | RS-485 and RS-422 | RS-485 and RS-422 | RS-485 and RS-422 |
| Driver and Receiver Count | 1 driver and 1 receiver | 1 driver and 1 receiver | 1 driver and 1 receiver | 1 driver and 1 receiver | 1 driver and 1 receiver | 1 driver and 1 receiver |
| Fail-Safe Receiver | Yes | Yes | Yes | Yes | Yes | Yes |
| Hot-Swap Support | Yes | Yes | Yes | Yes | Yes | Yes |
Principaux différenciateurs
- Combines fail-safe reception with hot-swap operation (vs MAX3071EAPD+)
- Provides ±15kV ESD protection (vs MAX3072EAPD+)
- Supports 250kbps differential communication (vs MAX3073EAPD+)
Notes de conception
Route the RS-485 or RS-422 driver and receiver connections as a controlled-impedance differential pair. Keep the pair length matched, minimize vias and stubs, and provide a continuous return path. Place the transceiver near the connector so transient energy is clamped before reaching sensitive logic. Avoid routing communications signals parallel to motor phases, relay contacts, or switching-converter power loops.
Do not apply RS-422 full-duplex termination rules to an RS-485 multidrop network. Confirm the bus topology, cable length, node count, bias resistors, and termination locations before enabling the driver. The MAX3070EAPD+ provides fail-safe and hot-swap features, but incorrect bus configuration can still produce excessive loading, reflections, or unintended driver contention.
Keep the 3.3V transceiver supply path close to the device and decouple it locally with the capacitance recommended by the family datasheet. Use a quiet ground reference for the digital side and maintain bus-return continuity. If the interface crosses a cable boundary, place appropriately rated surge and ESD protection near the connector, while coordinating its capacitance and clamping behavior with the intended maximum data rate.
Informations de conformité
No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status was stated for MAX3070EAPD+ in the available product records.