ADM489ANZ - 250kbps RS-485/RS-422 Transceiver | Analog Devices
Référence : ADM489ANZ ✓ ActifADM489ANZ Présentation
An RS-485 transceiver is an interface IC that converts logic-level signals into balanced differential signals for reliable communication over long, noisy, or multipoint wiring. An RS-422 transceiver serves a similar physical-layer role for balanced point-to-point links. The ADM489ANZ belongs to the transceiver, interface IC, and communications-semiconductor hierarchy, providing the physical layer between digital controllers and industrial cabling.
Slew-rate limiting is a key feature of the ADM489ANZ. It reduces the rate at which driver edges transition, limiting high-frequency energy that can propagate through cables and disturb neighboring systems. This behavior makes the device suitable for industrial, instrumentation, building-control, and equipment networks where a moderate 250 kbps data rate is sufficient and controlled transitions improve interoperability.
The ADM489ANZ operates from a single 4.5 V to 5.5 V supply, placing it in the 5 V interface-device class. Its one-driver, one-receiver organization supports full-duplex operation, while its differential driver and receiver interface is intended for balanced transmission lines. The operating temperature range extends from -40 °C to +85 °C, allowing use across industrial and commercial temperature conditions.
Typical applications include industrial control networks, factory automation links, building automation equipment, instrumentation, and other balanced data buses. Because the interface is full duplex, transmit and receive paths can operate simultaneously. System designers must still observe the bus topology, termination, grounding, and enable-control requirements described in the manufacturer datasheet.
For new layouts, place the transceiver close to the connector and route the balanced pair as a tightly coupled differential pair with a continuous ground reference. Appropriate termination and biasing depend on the cable length, topology, and network design. Check signal polarity and driver-enable timing before operation to prevent multiple transmitters from driving the bus simultaneously.
This page combines the manufacturer electrical and ordering information with package details, interface-selection guidance, verified source links, and practical comparison criteria. It is intended to help engineers evaluate the ADM489ANZ for a new RS-485 or RS-422 design and to identify whether a candidate replacement truly preserves its package, pinout, operating range, and communications behavior.
Alternatives de remplacement direct pour ADM489ANZ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ADM489ANZ (même facteur de forme et même empreinte) — différant par Package, Product Type.
ADM489AN
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →MAX489EPD+
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADM489ANZ Spécifications
| Product Type | Full-duplex differential line transceiver |
| Supported Standards | EIA RS-485 and RS-422 |
| Number of Drivers | 1 |
| Number of Receivers | 1 |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Supply Variation Tolerance | ±10% |
| Maximum Data Rate | 250 kbps |
| Plage de température de fonctionnement | -40 °C to +85 °C |
| Boîtier | 14-pin PDIP, 0.300 inch body width, 7.62 mm pitch |
| Style de montage | Through-hole PDIP |
| Packaging | Tube |
| Slew Rate | Limited; numeric slew-rate value not stated |
| Driver Disable Support | Yes |
Guide de configuration des broches du ADM489ANZ 14-pin pdip, 0.300 inch body width, 7.62 mm pitch
Configuration des broches du ADM489ANZ (boîtier 14-pin pdip, 0.300 inch body width, 7.62 mm pitch). 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 ADM489ANZ.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ADM489ANZ convient pour 6 applications: Industrial Control Networks, Factory Automation Equipment, Building Automation and HVAC, Instrumentation and Test Systems, Security and Access-Control Equipment, Telecom and Remote Monitoring.
Industrial Control Networks
The ADM489ANZ fits balanced control links that need full-duplex communication at rates up to 250 kbps. Its 4.5 V to 5.5 V operating range is compatible with conventional 5 V industrial electronics, while the slew-rate-limited driver reduces fast-edge energy on longer cables. The -40 °C to +85 °C rating supports equipment deployed across industrial temperature zones. Designers should preserve the differential trace geometry, provide a continuous ground reference, and prevent more than one driver from being enabled on the same bus.
Recommandé
Factory Automation Equipment
Factory automation controllers often exchange commands and status data over balanced wiring where a 250 kbps rate is sufficient. The ADM489ANZ provides one driver and one receiver in a full-duplex arrangement, allowing continuous bidirectional communication. Its 14-pin PDIP format can simplify through-hole construction and rework compared with fine-pitch surface-mount packages. System designers should account for motor-generated noise, maintain a low-impedance ground connection, and verify termination at the physical ends of the bus.
Recommandé
Building Automation and HVAC
The ADM489ANZ can connect building controllers, HVAC equipment, sensors, and supervisory systems over balanced RS-485 links. A 250 kbps limit is well suited to supervisory control traffic that does not require real-time video or storage bandwidth. Full duplex allows command and response traffic to coexist, and the -40 °C to +85 °C range accommodates equipment rooms and unheated enclosures. Cabling practices remain important: keep the pair together, avoid long unprotected stubs, and follow the bus topology specified for the installation.
Recommandé
Instrumentation and Test Systems
The ADM489ANZ is appropriate for distributed instrumentation that exchanges measurement commands and results through a balanced bus at moderate speed. Its full-duplex architecture prevents the transmitting and receiving paths from sharing the same pair, while the slew-rate-limited output reduces unwanted high-frequency coupling into sensitive measurements. Use a clean analog and digital ground strategy, route the bus away from switching nodes, and verify the receiver threshold and bus idle behavior in the final equipment configuration.
Recommandé
Security and Access-Control Equipment
Access-control readers, controllers, and monitoring equipment can use the ADM489ANZ for reliable balanced command and status communication. Full-duplex operation supports simultaneous requests and responses, and the limited 250 kbps rate matches the payload requirements of typical identity and event traffic. Because security systems may span building boundaries and connect to longer cables, designers should assess surge protection, isolation, grounding, and connector pinout continuity rather than relying on transceiver compliance alone.
Recommandé
Telecom and Remote Monitoring
The ADM489ANZ can interface remote monitoring units with a central controller over balanced wiring. Its 5 V supply range, 250 kbps data rate, and -40 °C to +85 °C operating range fit many telemetry and supervisory-control designs. The full-duplex arrangement allows continuous status collection while commands are returned. For long outdoor routes, add appropriately selected surge and isolation protection, maintain consistent reference grounds where required, and validate the complete cable and termination network under worst-case loading.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADM489ANZ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADM489AN | MAX489EPD+ |
|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Maxim Integrated |
| Package | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP |
| Transceiver Configuration | 1 driver / 1 receiver | 1 driver / 1 receiver | 1 driver / 1 receiver |
| Duplex Mode | Full duplex | Full duplex | Full duplex |
Principaux différenciateurs
- Full-duplex operation with one driver and one receiver (vs MAX489EPD+)
- Documented 250 kbps operation (vs ADM489AN)
- Controlled driver-edge behavior (vs MAX489EPD+)
Notes de conception
Route the ADM489ANZ differential pair as a controlled-impedance, tightly coupled pair over a continuous reference plane. Keep the transceiver close to the connector so external surge energy is clamped before reaching the device. Avoid routing the pair through noisy power-switching areas, and use a single, clearly defined grounding strategy for the transceiver, connector shield, and downstream equipment.
Do not enable multiple drivers on the same differential bus. The ADM489ANZ supports driver disable, but its control sequence must prevent bus contention during startup, reset, or fault recovery. Confirm receiver and driver logic levels in the system controller, ensure the bus remains in a valid idle state, and verify that any alternate driver is disabled before the primary driver is enabled.
Use the 250 kbps rate as a system ceiling rather than assuming every cable installation supports the maximum rate. Longer cables, stubs, heavy loading, and mismatched impedances reduce the usable margin. Apply the termination and biasing arrangement appropriate to the selected topology, minimize branch lengths, and test operation with all transmitters connected and the production cable installed.
Place the transceiver's supply decoupling directly beside its power and ground pins, using the capacitor arrangement specified by the manufacturer datasheet. Keep the high-current return path away from sensitive signal-ground areas. Since the accepted supply range is 4.5 V to 5.5 V, confirm that the complete 5 V rail remains inside this range during startup, load transients, and minimum operating voltage.
Informations de conformité
The ADM489ANZ supports EIA RS-485 and RS-422 and is described in the manufacturer datasheet as compliant with JEDEC MS-001-AA package requirements. Current RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations were not established by the available product records.
