ISO1452BDW - 50Mbps Isolated RS-485/RS-422 | Texas Instruments
Référence : ISO1452BDW ✓ ActifISO1452BDW Présentation
An isolated RS-485 or RS-422 transceiver is an interface IC that transfers differential data across a communication link while electrically separating the equipment-side circuitry from the bus-side circuitry. In the signal hierarchy, it belongs to the RS-485/RS-422 transceiver class, within interface ICs and broader semiconductor devices. Galvanic isolation limits fault-current and ground-potential pathways between connected systems while enabling communication across substantial isolation barriers.
The ISO1452BDW combines 50-Mbps data capability, full-duplex operation, RS-485 and RS-422 compatibility, and EMC protection in one 16-SOIC device. Its differential bus interface is suitable for industrial control, instrumentation, and data-acquisition systems where reducing common-mode interference is important. The integrated 3-channel digital isolator also allows a host-side digital interface to cross the same isolation barrier.
Texas Instruments describes the family as compatible with TIA/EIA-485-A and built around a silicon-dioxide capacitive isolation barrier. The 5-kVrms withstand rating and 1500-VPK working voltage provide quantified isolation capability. Because the exact detailed electrical limits and timing values are not included in the supplied verified extracts, parameters such as receiver thresholds, propagation delay, supply current, and temperature limits must be confirmed in the manufacturer datasheet before release.
Typical applications include industrial RS-485 networks, isolated RS-422 point-to-point links, factory automation equipment, motor-control systems, and instrumentation requiring a high-speed isolated data interface. Full-duplex operation allows separate transmitting and receiving paths, which can simplify communication timing compared with a shared half-duplex bus.
PCB design should preserve the isolation boundary, minimize differential-trace asymmetry, provide the capacitor and supply networks recommended by the manufacturer, and avoid placing unprotected copper or assembly features across the isolation barrier. The 16-pin wide-body SOIC footprint should be checked against its creepage, clearance, and pad geometry before layout.
This page consolidates the verified manufacturer and distributor facts for ISO1452BDW, distinguishes documented capability from data still requiring datasheet confirmation, and provides a conservative replacement guide for engineers evaluating same-package alternatives.
Alternatives de remplacement direct pour ISO1452BDW — 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 ISO1452BDW (même facteur de forme et même empreinte) — différant par EMC Protection, Mounting Type, Product Type, Supported Standards.
ISO1452DWR
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →ISO1452DW
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →ISO1452BDWR
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ISO1452BDW Spécifications
| Product Type | Isolated RS-485/RS-422 transceiver |
| Manufacturer | Texas Instruments |
| Maximum Data Rate | 50 Mbps |
| Duplex Mode | Full duplex |
| Supported Standards | TIA/EIA-485-A, RS-485, RS-422 |
| Isolation Withstand Voltage | 5 kVrms |
| Isolation Working Voltage | 1500 VPK |
| Digital Isolation Channels | 3 channels |
| Isolation Barrier Technology | Silicon-dioxide capacitive isolation barrier |
| EMC Protection | EMC protected |
| Package Type | 16-pin wide-body SOIC |
| Type de montage | Surface mount |
| Terminal Count | 16 terminals |
| Automotive Temperature Grade | Automotive |
| Receiver Count | 1 receiver |
| Transmitter Count | 1 transmitter |
Guide de configuration des broches du ISO1452BDW 16-pin wide-body soic
Configuration des broches du ISO1452BDW (boîtier 16-pin wide-body soic). 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 ISO1452BDW.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ISO1452BDW convient pour 6 applications: Industrial RS-485 Automation Networks, Isolated RS-422 Point-to-Point Links, Factory Motor-Control Isolation, Instrumentation and Data-Acquisition Systems, Medical and Diagnostic Equipment, Isolated Building and Energy-Control Networks.
Industrial RS-485 Automation Networks
The ISO1452BDW fits industrial automation networks requiring isolated RS-485 communication between a controller and field equipment. Its 50-Mbps maximum data rate provides substantial link margin, while full-duplex operation permits simultaneous transmission and reception. The 5-kVrms isolation withstand rating and 1500-VPK working voltage help separate the controller ground domain from the bus-side interface. The 16-pin wide-body SOIC package also provides a practical isolation boundary on the PCB. Designers should use the manufacturer datasheet to confirm logic thresholds, timing, external capacitance, and bus loading.
Recommandé
Isolated RS-422 Point-to-Point Links
The ISO1452BDW supports isolated point-to-point RS-422 links where full-duplex data flow and high signaling speed are important. At up to 50 Mbps, the transceiver is suitable for equipment connections that exceed the rate of many conventional RS-422 transceivers. Its 3-channel digital isolator can carry related control signals across the isolation barrier. The 5-kVrms rating supports robust separation between connected systems, but cable length, termination, skew, and propagation-delay margins must be evaluated together because a high IC data rate does not remove channel-level limitations.
Recommandé
Factory Motor-Control Isolation
The ISO1452BDW is appropriate for factory motor-control and industrial drive modules where a control processor must communicate through an isolation barrier. Full-duplex RS-485/RS-422 operation can support simultaneous command and feedback traffic, while the 50-Mbps capability offers useful timing margin. The 5-kVrms isolation withstand rating and 1500-VPK working voltage help manage galvanic separation between control and power domains. Layout must keep high-current switching paths away from the isolated interface and preserve the manufacturer's recommended creepage and clearance around the device.
Recommandé
Instrumentation and Data-Acquisition Systems
The ISO1452BDW can connect laboratory, process, and data-acquisition equipment requiring a fast, galvanically isolated differential communication path. Its 50-Mbps maximum rate supports high-volume command and measurement traffic, and the full-duplex architecture removes the need to share a single bus direction. The 3-channel digital isolator provides additional isolated digital connectivity, while the 5-kVrms withstand rating is valuable when instrument grounds may differ from host grounds. Engineers should verify analog and digital return paths so bus noise is not inadvertently coupled through the enclosure or shield system.
Recommandé
Medical and Diagnostic Equipment
The ISO1452BDW can be evaluated for medical and diagnostic equipment where a communication link must cross a patient-protection or equipment-isolation boundary. Its 5-kVrms isolation withstand rating, 1500-VPK working voltage, and full-duplex RS-422/RS-485 capability support a high-speed isolated data path. The 50-Mbps rate provides ample bandwidth for commands and diagnostic data. Actual medical suitability cannot be inferred from these communication specifications alone; the complete system must satisfy applicable safety, creepage, clearance, component-qualification, and risk-management requirements.
Recommandé
Isolated Building and Energy-Control Networks
The ISO1452BDW suits building-control, energy-management, and distributed equipment nodes that exchange data over isolated RS-485 or RS-422 links. Full-duplex communication can simplify protocol timing between a central controller and remote module, and the 50-Mbps maximum rate covers common control traffic with margin. The 5-kVrms isolation withstand rating helps reduce fault-current paths between differently powered subsystems. The 16-pin wide-body SOIC footprint is compatible with conventional leaded assembly, but production designs must preserve creepage, clearance, and separate ground domains around the isolation barrier.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ISO1452BDW — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ISO1452DWR | ISO1452DW | ISO1452BDWR |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 16-pin wide-body SOIC | 16-pin wide-body SOIC - same | 16-pin wide-body SOIC - same | 16-pin wide-body SOIC - same |
| Maximum Data Rate | 50 Mbps | 50 Mbps | 50 Mbps | 50 Mbps |
| Duplex Mode | Full duplex | Full duplex | Full duplex | Full duplex |
| Isolation Withstand Voltage | 5 kVrms | 5 kVrms | 5 kVrms | 5 kVrms |
| Isolation Working Voltage | 1500 VPK | 1500 VPK | 1500 VPK | 1500 VPK |
| Digital Isolation Channels | 3 channels | 3 channels | 3 channels | 3 channels |
| Interface Standards | RS-485 and RS-422, compatible with TIA/EIA-485-A | RS-485 and RS-422, compatible with TIA/EIA-485-A | RS-485 and RS-422, compatible with TIA/EIA-485-A | RS-485 and RS-422, compatible with TIA/EIA-485-A |
| EMC Protection | EMC protected | EMC protected | EMC protected | EMC protected |
Principaux différenciateurs
- High-speed isolated differential communication (vs ISO1432DWR)
- Integrated multi-channel digital isolation (vs ISO1410DWR)
- EMC-focused interface implementation (vs SN65HVD06D)
- Full-duplex bus operation (vs SN75174DWR)
Notes de conception
Preserve the manufacturer-specified isolation boundary on all copper, solder mask, silkscreen, and assembly layers. Do not route ground or chassis connections across the barrier. Maintain the datasheet's creepage and clearance requirements and avoid placing high-voltage or high-current switching nodes near either side of the isolated interface.
Route the RS-485 or RS-422 differential pair as a tightly coupled pair with matched impedance, consistent length, and minimal stubs. Keep the bus-side traces away from digital switching edges and the isolated-side supply return. Verify propagation-delay and skew budgets at 50 Mbps and confirm that the connector, cable, termination, and transceiver can all support the intended signaling distance.
Do not treat a 50-Mbps IC data-rate rating as permission to omit termination or relax cable-length calculations. Confirm the receiver topology, fail-safe behavior, bus loading, common-mode range, supply levels, and logic thresholds in the ISO1452 datasheet. Also verify that the selected ISO1452 ordering suffix provides the required temperature grade and shipping format.
Follow the manufacturer's guidance for each isolated supply domain, including capacitor selection, placement, and return-current routing. Keep input and ground planes continuous on their respective sides of the isolation barrier. Because detailed supply-current and capacitor values were not included in the supplied data, they must be obtained from the manufacturer datasheet rather than estimated.
Informations de conformité
The supplied verified extracts identify the ISO1452 family as compatible with TIA/EIA-485-A and describe a 5-kVrms isolated interface, but they do not explicitly state the target MPN's RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The distributor excerpt labels the temperature grade as automotive, but that statement alone was not treated as proof of AEC-Q100 qualification.
