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ISO1450BDW - 50Mbps 5kVrms RS-485/422 Isolated Transceiver | TI
The Texas Instruments ISO1450BDW is an EMC-protected, galvanically-isolated, half-duplex RS-485 and RS-422 transceiver housed in a 16-pin wide-body SOIC (DW) package with 5 kVrms reinforced isolation. The device operates at data rates up to 50 Mbps and supports TIA/EIA-485-A and TIA/EIA-422-B standards, integrating a differential line driver, a differential line receiver, a power transformer driver, and an LDO regulator on the isolated side into a single silicon die. An isolated RS-485 transceiver is a physical-layer interface IC that combines a galvanic isolation barrier (typically using an on-chip silicon-oxide or polyimide-based capacitive isolator plus an embedded micro-transformer for power transfer) with a differential line transceiver. The isolation barrier breaks ground loops between the fieldbus wiring and the controller side, providing safety in high-voltage environments and immunity to common-mode transients. In the system hierarchy, ISO1450BDW sits at the physical layer (OSI layer 1) of industrial fieldbus, motor-drive, and substation networks, between the bus cable and a UART or serial-communications controller (e.g., an MCU USART, FPGA LVDS, or DSP SCIA). Key differentiating features of the ISO1450BDW include integrated digital isolation that eliminates the need for a separate digital isolator and isolated DC-DC converter, basic and reinforced insulation ratings per VDE 0884-11, working voltage of 1060 Vrms and surge isolation voltage of 10 kVpk, plus robust bus-side protection against IEC 61000-4-2 electrostatic discharge and IEC 61000-4-4 electrical fast transients. The device also provides thermal shutdown, current limiting, and fail-safe receiver outputs when the bus is idle, shorted, or terminated but undriven. Architecturally, the ISO1450BDW uses TI's silicon dioxide capacitive-isolation technology with an embedded center-tapped transformer for primary-to-secondary power transfer, removing the requirement for an external isolated supply on the bus side. The wide-body SOIC (DW) package maintains the >8mm clearance and creepage distances required for reinforced insulation under IEC 60747-17 and UL 1577, while offering a familiar SOIC-16 footprint that simplifies board layout. Typical applications include factory-automation fieldbus links (Profibus, Modbus RTU, BACnet MS/TP), solar inverter RS-485 monitoring strings, motor-drive control and feedback links, and any industrial-controller UART-to-RS-485 path where robust EMC performance and galvanic isolation are mandatory. Design considerations include placing 220 nF 0603 bypass capacitors on each VCC pin near the device, observing the 50 Mbps data-rate limit when using non-shielded twisted-pair cable, and respecting the maximum bus loading of 32 unit loads. This page synthesizes distributor pricing, drop-in same-brand alternatives, and EMC-aware design notes not always consolidated on a single manufacturer page.
ISO1450BDWR - 50Mbps 5kVrms Isolated RS-485/RS-422 Transceiver | Texas Instruments
The Texas Instruments ISO1450BDWR is a galvanically isolated, EMC-protected, 50-Mbps half-duplex RS-485/RS-422 transceiver housed in a 16-pin SOIC (DW) package with wide-body creepage and clearance for 5 kVrms reinforced isolation. The device integrates a single differential line driver/receiver pair, an on-chip low-dropout isolated DC-DC bias supply, and TI's silicon-dioxide (SiO2) capacitive isolation barrier. An isolated RS-485/RS-422 transceiver is a transceiver that bridges a logic-level UART or SPI controller across an isolation barrier to a differential bus that conforms to TIA/EIA-485-A or TIA/EIA-422. The isolation galvanically separates the field-side bus (which can be exposed to high common-mode voltages, ground loops, or surge events) from the low-voltage logic domain. In the broader hierarchy, the ISO1450 belongs to isolated interface ICs, which sit under interface ICs, which in turn fall under integrated circuits used for industrial communication links. Key features include ±16 kV IEC 61000-4-2 ESD (HBM-equivalent on bus pins), ±4 kV IEC 61000-4-4 EFT immunity, 50 Mbps NRZ signaling, 1/8 unit-load support for up to 256 nodes on the bus, an extended -40C to +125C operating range, thermal shutdown, current limiting, and a low-power standby mode. The 5 kVrms reinforced isolation rating eliminates external optocouplers and isolated bias supplies, cutting BOM count and PCB area. The architecture pairs a TI proprietary differential line driver with a capacitive isolation channel that carries both data and bias power. The integrated isolated DC-DC eliminates the need for a separate isolated bias supply; only a single 3.3V or 5V rail on VCC1 is required to operate the field-side bus driver across the barrier. Typical applications include isolated RS-485 nodes in industrial fieldbus networks (Modbus RTU, PROFIBUS), solar inverter string monitoring, battery management system (BMS) slave communications, and any system where high common-mode transients appear across the bus-ground reference. When designing with the ISO1450BDWR, place 100 nF decoupling capacitors on both VCC1 and VCC2 within 2 mm of the device pins, and keep the SOIC-16 wide-body (DW) land pattern intact to preserve the 5 kVrms creepage. For best EMC, add a 100 ohm differential termination at the bus end and a TVS diode such as the SMBJ12CA if the cable runs outdoors. This page synthesizes distributor pricing, drop-in alternatives drawn from the same ISO14xx family and competitor cross-references, and practical EMC layout notes not consolidated in the manufacturer datasheet.
ISO1450DW - 50 Mbps 5 kVrms Isolated RS-485/RS-422 | Texas Instruments
Texas Instruments ISO1450DW is an EMC-protected, 50-Mbps, half-duplex, 5-kVrms isolated RS-485 and RS-422 transceiver in a 16-pin SOIC wide-body package. It is designed for industrial communication links that require galvanic isolation, robust electromagnetic-noise immunity, and high-speed differential signaling. The verified manufacturer information identifies the ISO1450 family as an isolated differential line transceiver for TIA/EIA RS-485 and RS-422 applications, while distributor data identifies ISO1450DW as a 1/1 transceiver with a 16-SOIC package. The device operates from 1.71 V to 5.5 V and is specified for operation from -40 °C to 125 °C, providing a useful combination of low-voltage digital compatibility and extended industrial temperature coverage. Its 5-kVrms isolation rating is intended to help protect logic-side equipment from high-energy bus-side transients and ground-potential hazards, while the EMC protection is intended to improve operation in electrically noisy industrial environments. The 50-Mbps signaling capability supports high-speed half-duplex point-to-point or multipoint bus communication where system topology and termination are properly controlled. In the ISO1450 family, ISO1450DW is the wide-body 16-pin SOIC ordering option; package code DW identifies that mechanical outline, and the ISO1410DWEVM is identified as the evaluation module for evaluating the related isolated RS-485 ISO1410 in the same DW package family. ISO1450DW is therefore appropriate for factory automation, industrial controllers, test equipment, building systems, and communication interfaces where isolation and noise robustness are more important than a low-cost non-isolated transceiver. The half-duplex arrangement means transmit and receive functions share the differential bus pins, so firmware and bus direction control must be managed carefully. Designers should also verify the complete isolation system, cable length, termination, grounding, and protection-network strategy against their application requirements.
ISO1450DWR - 50Mbps Isolated RS-485/422 | Texas Instruments
The Texas Instruments ISO1450DWR is an EMC-protected, 50-Mbps, half-duplex isolated RS-485 and RS-422 transceiver packaged in a 16-pin SOIC (DW). It combines differential bus-driver and receiver functions with 5-kVrms galvanic isolation, making it suitable for industrial systems where communication lines cross high-potential barriers or encounter substantial electromagnetic interference. An isolated RS-485 or RS-422 transceiver is an interface IC that transfers differential data across a bus while electrically separating the logic-side circuitry from the cable-side circuitry. The isolation barrier helps protect low-voltage host electronics from ground-potential differences, surge energy, and industrial noise. Within the hierarchy of interface semiconductors, the ISO1450 is a differential line transceiver, a digital isolator, and ultimately a network and industrial communication interface IC. The ISO1450DWR supports a maximum data rate of 50 Mbps in half-duplex operation. Its EMC protection is intended to help bus pins withstand electrostatic-discharge and electrical-fast-transient events encountered in harsh industrial environments. The 5-kVrms isolation rating is the central safety feature for factory automation, grid infrastructure, motor drives, and building-control systems. Operation from -40°C to +125°C supports a broad range of industrial temperature conditions. The 16-pin SOIC (DW) package provides a conventional surface-mount footprint suitable for high-volume PCB assembly. Because the transceiver is half-duplex, driver and receiver paths share the bus connection, and the system must control transmit and receive states without contention. Isolation also requires careful treatment of bus-side supply voltage, ground, and printed-circuit-board creepage rather than treating the isolation barrier as a decorative layout feature. Typical uses include isolated RS-485 links in PLC systems, photovoltaic inverters, HVAC controllers, industrial gateways, motor-control equipment, and building-automation nodes. Its 50-Mbps capability is useful for factory protocols, while 5-kVrms isolation supports applications where ground offsets or transient events could damage unprotected host circuitry. Designers should verify the complete pin assignment and isolation-component requirements in the manufacturer datasheet. PCB layout should preserve isolation creepage and clearance, route bus traces away from sensitive logic, use suitable protection networks where the application requires them, and provide correctly decoupled isolated-side supplies. The verified source data does not provide the complete pin table, pricing, electrical thresholds, or lifecycle details needed to substitute assumptions. This page consolidates verified manufacturer and distributor information with practical selection, layout, and comparison guidance. It distinguishes confirmed ISO1450DWR specifications from parameters that still require datasheet or quotation confirmation, helping engineers evaluate the 50-Mbps, 5-kVrms isolated interface without treating incomplete cross-reference information as a guaranteed drop-in replacement.
ISO1452BDW - 50Mbps Isolated RS-485/RS-422 | Texas Instruments
Texas Instruments ISO1452BDW is an EMC-protected, galvanically isolated RS-485 and RS-422 transceiver supporting 50 Mbps signaling in a 16-pin wide-body SOIC package. The device combines a full-duplex differential line transceiver with a 3-channel digital isolator, providing 5-kVrms isolation withstand and a 1500-VPK working isolation voltage. 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.
ISO1452BDWR - 50Mbps Isolated RS-485/RS-422 | Texas Instruments (Tape & Reel)
Texas Instruments ISO1452BDWR is an EMC-protected, galvanically isolated RS-485 and RS-422 transceiver supporting 50 Mbps signaling in a 16-pin wide-body SOIC package. The device combines a full-duplex differential line transceiver with a 3-channel digital isolator, providing 5-kVrms isolation withstand and a 1500-VPK working isolation voltage. 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 ISO1452BDWR 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 ISO1452BDWR, distinguishes documented capability from data still requiring datasheet confirmation, and provides a conservative replacement guide for engineers evaluating same-package alternatives.
ISO1452DW - 50Mbps 5kVrms Isolated RS-485/RS-422 | TI
The Texas Instruments ISO1452DW is an EMC-protected, galvanically isolated, full-duplex RS-485 and RS-422 transceiver with a 50-Mbps data rate, 5-kVrms reinforced isolation, and a 16-pin SOIC (DW) package. The device includes one driver and one receiver and operates from 3.3-V or 5-V supplies across an industrial temperature range of -40°C to +125°C. Its isolated bus interface is designed for communication links exposed to electrostatic discharge and electrical fast transient events. An isolated RS-485/RS-422 transceiver is a differential interface IC that transfers data between a logic-domain controller and a long-distance, noise-prone communications bus. Galvanic isolation places a robust isolation barrier between those domains, helping prevent ground-potential differences and ground current from disrupting data transfer or damaging connected equipment. Within the interface hierarchy, ISO1452DW is a bus transceiver, a communications interface IC, and a digital isolation IC. The principal features include 50-Mbps operation, full-duplex communication, simultaneous transmitter and receiver paths, EMC-protected bus pins, and reinforced 5-kVrms isolation. Operating from both 3.3-V and 5-V supplies allows the device to interface with modern low-voltage controllers as well as established 5-V industrial logic. The wide -40°C to +125°C range supports use in industrial equipment where ambient temperatures may exceed consumer-device limits. The ISO1452 is positioned for harsh industrial environments rather than short, isolated board-to-board links. Its differential signaling rejects common-mode noise encountered on RS-485 and RS-422 cabling, while the integrated isolation and bus-pin protection improve system resilience. Full-duplex operation provides independent transmit and receive paths, making the device suitable for industrial automation, factory equipment, building controls, and other multidrop or point-to-point industrial communication systems. Typical applications include factory automation controllers, industrial sensor gateways, motor-control systems, building automation equipment, data acquisition systems, and isolated service interfaces. In these applications, the 50-Mbps rate supports high-speed data transfer, while the 5-kVrms isolation barrier separates the bus from the local logic ground. The 16-pin SOIC package is also easier to assemble than a larger high-voltage isolation module. Designers should treat the isolation barrier and bus pins as dedicated high-energy interfaces. PCB creepage and clearance must follow the reinforced-isolation requirements in the manufacturer datasheet, bus protection must not be assumed to replace a correctly designed TVS and termination network, and the transceiver must be configured for the intended RS-485 or RS-422 topology. The verified source set does not provide the complete pin assignments or isolation layout dimensions. This page consolidates the verified manufacturer and distributor information for ISO1452DW, identifies the only substantiated same-package family alternative, and separates known engineering data from values that require confirmation in the manufacturer datasheet before layout or procurement decisions are finalized.
ISO1452DWR - 50Mbps 5kVrms Isolated RS-485/RS-422 Transceiver
The Texas Instruments ISO1452DWR is an EMC-protected, galvanically isolated full-duplex RS-485 and RS-422 transceiver with a 50-Mbps data rate and 5-kVrms reinforced isolation. It is packaged in a 16-pin wide-body SOIC and is intended for industrial communication systems where high-speed differential signaling, surge withstand, and electrical isolation are required. The device combines one driver and one receiver for full-duplex bus operation, separating the logic-side interface from the field-side RS-485 or RS-422 connection. An isolated differential transceiver is an interface IC that transfers data across a galvanic-isolation barrier while rejecting common-mode noise on the cable. RS-422 supports point-to-point, full-duplex differential signaling, while RS-485 permits multipoint bus communication. The ISO1452 combines these standards with integrated isolation and EMC protection, placing it within the hierarchy of interface ICs, communication transceivers, and industrial interface semiconductors. The principal features are a 50-Mbps maximum data rate, 5-kVrms isolation rating, full-duplex operation, and robust EMC protection. The bus pins are designed to withstand high levels of IEC electrostatic-discharge and electrical-fast-transient events, reducing the need for additional external protection in harsh industrial environments. Galvanic isolation also prevents ground-potential differences and common-mode currents on the bus from reaching the host electronics. The ISO1452 architecture is suited to high-speed, noise-sensitive industrial links where the controller and field equipment may be separated by substantial ground offsets. Its full-duplex arrangement uses separate differential driver and receiver paths, avoiding the shared-bus turn-around behavior of half-duplex designs. This can simplify protocol timing, but it requires separate transmit and receive wiring and careful termination at the appropriate ends of each differential pair. Typical uses include factory automation, motor drives, grid infrastructure, photovoltaic inverters, HVAC equipment, building automation, fieldbus gateways, and industrial test equipment. These applications benefit from the combination of 50-Mbps throughput, 5-kVrms isolation, and EMC protection. The isolation barrier is particularly useful where high-voltage equipment, long cables, or separate power domains create dangerous ground-potential differences. Designers must observe the RS-422 and RS-485 termination, biasing, common-mode, and layout requirements of the selected bus topology. The wide-body SOIC package should be placed with its isolation barrier and primary-side versus secondary-side circuits clearly separated, while high-current surge paths should be kept away from sensitive logic traces. The exact pin assignments and bypass recommendations should be taken from the manufacturer datasheet rather than inferred from the ordering code. This page combines verified manufacturer and distributor information with practical selection criteria, application context, and cross-reference guidance. It is intended to help engineers identify whether the ISO1452DWR matches a required data rate, isolation level, bus standard, package, and industrial EMC environment before committing the part to a PCB design.
ISO1500DBQ - 1Mbps 3kVrms Isolated RS-485/RS-422 (Tape & Reel)
The Texas Instruments ISO1500DBQ is a 1-Mbps, half-duplex, 3-kVrms isolated RS-485 and RS-422 transceiver in a 16-pin SSOP package. It combines a three-channel digital isolator with a differential bus transceiver, providing galvanic isolation between the logic-side interface and the RS-485 or RS-422 bus. The device is designed for space-constrained industrial communication systems that require robust data transmission, bus protection, and a compact footprint. A digital isolator transfers signals across an insulating barrier while maintaining separate ground domains. The ISO1500 uses that isolation concept for its receive and transmit paths, helping protect a controller from ground-potential differences and electrical stress on the bus. In the RS-485/RS-422 hierarchy, the transceiver drives or receives differential signals over a balanced cable, allowing reliable communication over longer distances than single-ended interfaces. The ISO1500DBQ operates at data rates up to 1 Mbps and supports both RS-485 and RS-422 applications. Its bus pins are protected against IEC ESD contact discharge and IEC EFT events, according to the Texas Instruments product information. The receiver output includes failsafe behavior for bus-open, bus-short, and bus-idle conditions, helping the system avoid undefined receiver states during faults or inactive periods. These features suit industrial automation, motor drives, and isolated equipment interfaces. The device is supplied in an ultra-small 16-pin SSOP package, which supports compact PCB layouts while simplifying assembly. Its isolation rating is 3 kVrms, and the product family is intended for applications where reliable communication across a high-voltage barrier is valuable. The exact supply-voltage limits, receiver thresholds, propagation delays, and bus-loading values should be confirmed in the manufacturer datasheet before final circuit design. Typical applications include industrial automation equipment, factory-floor controllers, motor-drive interfaces, isolated serial links, and embedded systems that communicate over long balanced cables. The half-duplex architecture means the transmitter and receiver share bus-direction control, allowing a compact two-wire RS-485 implementation. Designers should verify the direction-control timing, termination strategy, grounding arrangement, and isolation requirements for the selected bus topology. This page combines verified manufacturer and distributor information with practical selection guidance, interface considerations, and application-oriented explanations. It is intended to help engineers identify whether the ISO1500DBQ matches the required speed, isolation level, package, and protection features for a specific industrial design.
ISO1500DBQR - 1Mbps 3kVrms Isolated RS-485/RS-422
The Texas Instruments ISO1500DBQR is a 1-Mbps, half-duplex, 3-kVrms isolated RS-485 and RS-422 transceiver in a 16-pin SSOP package. It combines a three-channel digital isolator with a differential bus transceiver, providing galvanic isolation between the logic-side interface and the RS-485 or RS-422 bus. The device is designed for space-constrained industrial communication systems that require robust data transmission, bus protection, and a compact footprint. A digital isolator transfers signals across an insulating barrier while maintaining separate ground domains. The ISO1500 uses that isolation concept for its receive and transmit paths, helping protect a controller from ground-potential differences and electrical stress on the bus. In the RS-485/RS-422 hierarchy, the transceiver drives or receives differential signals over a balanced cable, allowing reliable communication over longer distances than single-ended interfaces. The ISO1500DBQR operates at data rates up to 1 Mbps and supports both RS-485 and RS-422 applications. Its bus pins are protected against IEC ESD contact discharge and IEC EFT events, according to the Texas Instruments product information. The receiver output includes failsafe behavior for bus-open, bus-short, and bus-idle conditions, helping the system avoid undefined receiver states during faults or inactive periods. These features suit industrial automation, motor drives, and isolated equipment interfaces. The device is supplied in an ultra-small 16-pin SSOP package, which supports compact PCB layouts while simplifying assembly. Its isolation rating is 3 kVrms, and the product family is intended for applications where reliable communication across a high-voltage barrier is valuable. The exact supply-voltage limits, receiver thresholds, propagation delays, and bus-loading values should be confirmed in the manufacturer datasheet before final circuit design. Typical applications include industrial automation equipment, factory-floor controllers, motor-drive interfaces, isolated serial links, and embedded systems that communicate over long balanced cables. The half-duplex architecture means the transmitter and receiver share bus-direction control, allowing a compact two-wire RS-485 implementation. Designers should verify the direction-control timing, termination strategy, grounding arrangement, and isolation requirements for the selected bus topology. This page combines verified manufacturer and distributor information with practical selection guidance, interface considerations, and application-oriented explanations. It is intended to help engineers identify whether the ISO1500DBQR matches the required speed, isolation level, package, and protection features for a specific industrial design.
ISO1640BDR - Hot-Swappable Bidirectional I2C Isolator | Texas Instruments
The Texas Instruments ISO1640BDR is a hot-swappable, robust-EMC bidirectional I2C digital isolator with 3000 Vrms isolation (UL 1577), 2 channels, and 50 kV/us CMTI, housed in an 8-pin SOIC (D) package. It is part of the ISO164x family of low-power, low-emission isolators designed for I2C interfaces with bidirectional clock and data lines that support clock stretching and hot-swap events. The 8-pin D package variant is rated for 3000 Vrms basic or reinforced isolation, while the wider 16-pin DW package supports 5000 Vrms. An I2C digital isolator is a galvanic isolation device that allows two I2C buses to communicate across an isolation barrier while protecting low-voltage circuitry from high-voltage transients, ground potential differences, and noise. The hypernym hierarchy for this category is: I2C isolator -> digital isolator -> isolator -> interface IC -> integrated circuit -> semiconductor. Digital isolators replace legacy optocouplers in I2C applications by using CMOS-based capacitive or transformer coupling, achieving higher data rates, lower power, and better CMTI. Key features of the ISO1640BDR include bidirectional open-drain channels that pass SDA and SCL across the isolation barrier, hot-swap capability that tolerates plugging into a live backplane without latch-up, robust EMC that survives IEC 61000-4-2/4-4/4-5 system-level tests, integrated 3.0 mA current-limited pull-ups on each side for hot-swap control, and an operating temperature range of -40 C to +125 C. The device consumes roughly 8 mA per channel at 1 MHz and supports I2C data rates up to 1.7 Mbps (fast-mode plus). Typical applications include isolated I2C communication between a microcontroller and a high-side sensor or power-converter telemetry interface, isolated GPIO expansion over I2C, isolated EEPROM programming, isolated battery-management IC (BMS) comms in 48 V and 400 V systems, and isolated LED-display drivers. Industrial field-bus adapters, isolated PoE controllers, and isolated PMBus interfaces are also common deployments where 3000 Vrms isolation is sufficient. When designing with the ISO1640BDR, place 0.1 uF bypass capacitors on both VCC1 and VCC2 within 2 mm of the IC pins, and follow IEC 60747-17 creepage/clearance guidance for the chosen working voltage. The 8-D package has 4 mm of creepage across the barrier, which limits the maximum working voltage to approximately 400 Vrms for reinforced isolation per IEC 60747-17. This page synthesizes distributor pricing from LCSC and DigiKey, same-brand drop-in alternatives within the ISO164x family, and practical EMC and hot-swap design guidance not found in the manufacturer datasheet alone. Pinout, comparison, and design notes are derived from TI ISO1640 datasheet ISO1640 family literature.
ISO1640DWR - 5kVrms Bidirectional I2C Isolator | Texas Instruments
The Texas Instruments ISO1640DWR is a hot-swappable, robust-EMC bidirectional I2C digital isolator with a UL 1577 isolation rating of 5000 VRMS, two isolation channels, data rates up to 1.7 Mbps, and 50 kV/us common-mode transient immunity (CMTI), housed in a 16-pin SOIC (DW) package. A digital isolator is a semiconductor device that transfers digital signals across an isolation barrier separating two ground domains, preventing high voltages or fault currents from propagating between them. Within the power-management and interface-IC hierarchy, the ISO1640 belongs to the digital isolator family, specifically the isolated-protocol-interface subtype that natively understands a communication bus, here the two-wire I2C (Inter-Integrated Circuit) bus used by sensors, EEPROMs, and controllers. Key features include bidirectional I2C communication on the SCL and SDA lines without direction-control signals, hot-swap capability that keeps both bus sides powered down until a valid connection is established, and enhanced EMC performance suited to electrically noisy industrial environments. The open-drain outputs on each side allow direct connection to a shared I2C bus with external pull-up resistors, matching standard I2C electrical conventions. Technically, each isolation channel consists of a logic input and an open-drain output separated by a high-voltage isolation barrier implemented in TI's capacitive isolation technology, which supports the 50 kV/us CMTI rating. The low-emissions design minimizes radiated and conducted interference generated by the isolator itself, an important differentiator in EMC-sensitive systems. GPIO channels available on the ISO1640 variant allow two additional isolated general-purpose signals. Typical applications include isolated I2C links to battery management systems, isolating PMBus/SMBus rails in industrial power supplies, and protecting microcontrollers from ground loops in factory automation and test equipment. A key design consideration is sizing the pull-up resistors: with 1.7 Mbps support, keep bus capacitance low and choose pull-ups that meet the I2C rise-time spec at your operating frequency; the 8-pin ISO164x variants carry a lower 3000 VRMS rating, so package choice determines the isolation grade. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, adding comparison and sourcing value beyond the raw TI documentation.
ISO1641DWR - 5000Vrms I2C Isolator 1.7Mbps | Texas Instruments
The Texas Instruments ISO1641DWR is a hot-swappable, robust-EMC bidirectional I2C digital isolator with 5000 Vrms isolation (UL 1577), two isolation channels rated at 1.7 Mbps, and 50 kV/us common-mode transient immunity (CMTI), housed in a 16-pin SOIC (DW, 7.50 mm width) package. A digital isolator is a semiconductor device that transfers digital signals across an isolation barrier, preventing high voltages or ground-potential differences from propagating between two sides of a circuit. Within the signal-chain hierarchy, it belongs to the interface IC family, sitting alongside optocouplers and magnetic/capacitive isolators, and is a core building block of galvanic isolation and power-management architectures. Unlike optocouplers, modern CMOS digital isolators provide faster data rates, tighter timing, lower power, and far better aging characteristics. Key features of the ISO1641 include bidirectional SDA isolation with TI integrated one-shot dynamic logic for I2C clock stretching support, a unidirectional (clock) second channel, hot-swappable inputs that prevent bus latch-up during live insertion, and open-drain outputs that natively interface with wired-AND I2C buses. Enhanced EMC performance, including the 50 kV/us CMTI rating, keeps the barrier intact in electrically noisy industrial environments. Technically, the ISO1641 uses TI capacitive isolation technology with high-voltage isolation capacitors and on-chip signal conditioning. The bidirectional channel resolves bus contention automatically, so SDA behaves as a single wired-AND node across the barrier without external logic. Low-power operation suits battery-backed and densely packed field modules. Typical applications include isolated I2C interfaces for industrial Programmable Logic Controllers (PLCs), battery management systems (BMS), power-supply supervision and PMBus telemetry, and isolated GPIO extension in motor drives and renewable-energy inverters. Design consideration: the DW-package 5000 Vrms rating requires respecting creepage and clearance on the PCB layout; do not route high-voltage traces across the isolated region, and keep the barrier area free of solder-mask or conformal-coating bridging. This page synthesizes verified distributor data, drop-in alternative analysis, and practical design notes not found in the manufacturer datasheet.
ISO1I811TXUMA1 - Isolated 8Ch Digital Input Power Driver | Infineon
The Infineon ISO1I811TXUMA1 is an industrial interface IC with galvanic isolation that integrates an 8-channel digital input power driver with SPI communication, housed in a 48-pin TFSOP (Tape & Reel, PG-TFSOP-48) package with 0.240 inch (6.10 mm) body width. The device provides 500 VAC isolation, 25 kV/us minimum common-mode transient immunity (CMTI), and operates across an extended industrial temperature range up to 135 C, making it well suited for harsh PLC and DCS environments. An isolated digital input (DI) IC is a specialized interface device that bridges low-voltage logic (typically 3.3 V or 5 V microcontrollers) to high-voltage industrial field I/O (24 V DC IEC 61131-2 type-1/3 sensors), while providing galvanic isolation to protect the host controller from voltage transients, ground loops, and field-side faults. In the broader taxonomy, the ISO1I811T sits within the signal conditioning and isolation IC family, which is a sub-class of power management and interface ICs. It is functionally distinct from generic digital isolators (such as TI ISO77xx or ADI ADuM14xx) because it integrates the input conditioning current limiters, reverse-polarity protection, and threshold comparators in one isolated module. Key features include eight parallel input channels with individually programmable thresholds, integrated galvanic isolation rated at 500 VAC, 25 kV/us CMTI, an SPI interface for status read-back and configuration, and a wide supply range of approximately 5 V to 5.5 V. According to the Infineon product page, the part is qualified for industrial ambient temperatures up to 135 C and is optimized for EMI robustness in electrically noisy cabinet environments. Architecturally, the device uses Infineon's coreless transformer isolation technology combined with on-chip input current-limiters and IEC 61131-2 compliant switching thresholds. The SPI peripheral allows the host to poll each input's state, detect wire-break, and configure filter timing, reducing the FPGA/CPU GPIO count traditionally required for parallel isolated DI. Typical applications include PLC digital input modules, distributed I/O in DCS systems, industrial sensor interfaces, building automation I/O cards, and isolated front-ends for safety controllers. The TFSOP-48 surface-mount package simplifies PCB assembly and supports high-density input modules. When designing with this device, ensure that the field-side ground, host-side ground, and any cable shield are routed per the datasheet's creepage/clearance guidelines to preserve the 500 VAC isolation rating. The integrated thermal pad on the TFSOP package must be soldered to a sufficient copper pour to keep junction temperature below 135 C under worst-case input current. This page synthesizes distributor pricing, drop-in alternatives, application guidance, and design considerations not found on the manufacturer datasheet cover page.
ISO6760DWR - 6-Channel 50Mbps Digital Isolator | Texas Instruments
The Texas Instruments ISO6760DWR is a six-channel, all-forward-direction digital isolator with a 50 Mbps maximum data rate, reinforced 5000 Vrms isolation, and 1.8 V logic support, packaged in a 16-pin SOIC (DW). It is designed for high-speed digital communication across equipment, power, and ground barriers where noise immunity and galvanic isolation are required. The device provides six isolated output channels and no reverse input channels, making it appropriate for transmitting commands or data from one voltage domain to another without a direct conductive path. A digital isolator transfers logic signals across an insulation barrier while maintaining electrical separation between the input and output grounds. Galvanic isolation helps prevent ground loops, common-mode currents, and high-voltage fault energy from propagating between systems. In the broader hierarchy, digital isolators belong to interface ICs and signal-conditioning semiconductors, complementing optocouplers, transformers, and other isolation technologies. The ISO6760 family is designed for applications requiring both high data throughput and robust electromagnetic compatibility. Key electrical characteristics include six channels, 50 Mbps operation, 5000 Vrms isolation, and common-mode transient immunity identified in distributor data as 100 kV/µs. The wide operating temperature range is -40 °C to +125 °C, supporting industrial and automotive-adjacent equipment environments. Logic-side operation includes compatibility with 1.8 V systems, which is useful when interfacing modern low-voltage processors, sensors, and transceivers. The ISO6760DWR uses Texas Instruments’ reinforced digital-isolation technology to maintain signal integrity across the barrier while minimizing propagation delay and distortion. Its 16-SOIC package is compatible with standard surface-mount assembly and provides a practical isolation solution for control, communication, and protection interfaces. The exact channel direction and timing values should be confirmed against the manufacturer datasheet for the production design. Typical applications include isolated SPI or serial command links, CAN or RS-485 transceiver interfaces, power-converter control signals, industrial automation equipment, test and measurement systems, and high-voltage battery-management systems. Isolation helps keep low-voltage logic physically separated from noisy power stages while allowing communication at up to 50 Mbps. For PCB implementation, place the isolation device close to the barrier and route input and output returns to their respective ground domains. Keep decoupling capacitors near the supply pins and control creepage and clearance according to the system insulation requirements. Verify voltage levels, timing, isolation rating, and channel direction before final release.
ISO6760FDWR - 6-Ch 50Mbps Digital Isolator | Texas Instruments
Texas Instruments ISO6760FDWR is a 6-channel (6/0 direction) general-purpose digital isolator rated for 5000 Vrms isolation and 50 Mbps data rate, supplied in a 16-pin SOIC (DW) wide-body package. The device supports 1.8 V logic on side 1 (1.71 V to 1.89 V) and 2.25 V to 5.5 V on side 2, enabling direct interface with MCUs, FPGAs, and 5 V transceivers without level shifters. CMTI is specified at ±150 kV/us typical, and the silicon dioxide isolation barrier provides up to 10 kV surge capability. A digital isolator is a semiconductor IC that transfers logic signals across a galvanically isolated barrier using an embedded high-voltage capacitor or transformer. Digital isolators sit within the isolation IC category, which itself is a subset of interface ICs in the broader signal-conditioning and power-management hierarchy. Reinforced 5000 Vrms parts such as the ISO6760FDWR replace older optocoupler-based designs where speed, aging, and CTR degradation were limiting factors. Key features include: 50 Mbps signaling across all six channels, 5000 Vrms RMS working isolation per UL 1577, up to 10 kV surge rating, ±150 kV/us CMTI for robust operation in switching-power and motor-drive environments, low 1.5 mA per-channel quiescent current at 1 Mbps, and 1.71 V to 5.5 V supply range. The wide-body 16-DW package provides the 10.0 mm creepage/clearance demanded by IEC 60747-17 reinforced-reach designations. The architecture uses TI's capacitive SiO2 isolation barrier with on-off keying (OOK) signaling. An internal 1-LF reference on the side-rail and a differential refresh capacitor in the data path minimize component leakage and improve common-mode transient immunity. The result is a wide DL (load-dump) decoupling by -differential receiver that rejects fast dv/dt events above 100 kV/us, making it suitable for IGBT gate-driver signal isolation, where CM noise from the high-voltage bus would otherwise couple into logic ground. Typical applications include: isolated RS-232/RS-485/CAN/SPI interfaces, industrial fieldbus isolation, isolated gate drivers for IGBT/MOSFET half-bridges, medical equipment signal isolation, and PLC digital I/O modules. Its 1.8 V logic compatibility makes it ideal for bridging low-voltage SoCs to legacy 5 V industrial transceivers. Design consideration: place 0.1 uF and 1 uF bypass capacitors as close as possible to each VCC pin (VCC1 at pin 1, VCC2 at pin 16) to meet the datasheet's 1 ns rise-time decoupling requirement. The exposed thermal pad (pin 8) must be soldered to a grounded copper pour to meet the rated isolation; floating it reduces surge-withstand by 3 to 4 kV. This page synthesizes distributor stock and pricing, drop-in same-package and cross-brand equivalents, and practical PCB layout notes not collated in the manufacturer datasheet — saved engineering hours for industrial-isolation designers.
ISO6762FDWR - 6-Channel Digital Isolator 50Mbps | TI
The ISO6762FDWR is a general-purpose, six-channel digital isolator from Texas Instruments, featuring a 4/2 channel configuration (four forward, two reverse) and supporting data rates up to 50 Mbps. It provides reinforced isolation with a withstand voltage of 5000 Vrms and a common-mode transient immunity (CMTI) of 50 kV/µs, ensuring robust performance in noisy industrial environments. The device operates over a wide supply voltage range of 1.8V to 5.5V on both sides, making it compatible with low-voltage logic and legacy 5V systems. Housed in a 16-pin SOIC (DW) package with 7.50mm width, it is designed for surface-mount assembly and is qualified for operation from -40°C to 125°C. Digital isolators are components that provide galvanic isolation between two circuit domains while allowing digital signals to pass across the isolation barrier. They are essential in applications where ground potential differences, noise, or safety requirements demand separation, such as in industrial automation, motor drives, and medical equipment. The ISO6762FDWR uses capacitive isolation technology, which offers high-speed data transfer with low power consumption and excellent EMC performance, as highlighted in the datasheet. Key features of the ISO6762FDWR include its 50 Mbps data rate, which supports high-speed protocols like SPI and RS-485, and its 1.8V logic support, enabling direct interface with low-voltage microcontrollers. The device also features an enable pin for output control, fail-safe outputs that default to a known state when inputs are unpowered, and a wide temperature range. Its reinforced isolation rating ensures reliable operation in safety-critical applications. The ISO6762FDWR is built on TI's capacitive isolation technology, which uses high-voltage capacitors to couple signals across the barrier. This architecture provides low propagation delay and high CMTI, making it suitable for applications where fast transients are present. The device also includes integrated noise filtering to enhance signal integrity. Typical applications include isolating SPI, RS-232, RS-485, and CAN buses in industrial control systems, motor drives, and power converters. Its high data rate and robust isolation make it ideal for communication interfaces in factory automation and building automation. When designing with the ISO6762FDWR, ensure proper PCB layout with adequate clearance and creepage distances under the isolator to maintain the rated isolation voltage. Also, place decoupling capacitors close to the VCC pins to minimize noise.
ISO6763DWR - 6-Ch 50Mbps 5000Vrms Digital Isolator | TI
The Texas Instruments ISO6763DWR is a general-purpose six-channel (3/3) reinforced digital isolator with a 50 Mbps data rate, 5000 VRMS isolation rating, and 1.8 V logic support, housed in a 16-pin SOIC (DW, 7.50 mm width) package rated from -40C to +125C. A digital isolator is a semiconductor device that transfers digital signals across an isolation barrier without any galvanic connection, replacing optocouplers in the signal-isolation hierarchy of industrial interface and power-management systems. Reinforced digital isolators use a capacitive or transformer-based barrier certified to withstand thousands of volts, enabling safe communication between controllers and high-voltage circuitry in compliance with reinforced-insulation system requirements. The ISO6763DWR's key features include a 50 Mbps maximum data rate for high-throughput SPI, RS-485, CAN, and RS-232 links; a robust isolation barrier with up to 5000 VRMS isolation rating, 1500 VRMS working voltage, up to 10 kV surge capability, and high CMTI (50 kV/us minimum per distributor listings, up to 150 kV/us typical per the ISO676x datasheet); and a wide dual-supply range of 1.71 V to 1.89 V on one side and 2.25 V to 5.5 V on the other, allowing direct interfacing with 1.8 V logic. The device uses TI's proven capacitive isolation construction with an SiO2 dielectric barrier, delivering long barrier lifetime at 1500 VRMS working voltage and robust EMC performance against common-mode transients. The symmetrical 3-forward/3-reverse channel configuration supports bidirectional buses such as full-duplex RS-485 and isolated SPI with independent read-back. Typical applications include isolated CAN, RS-232, and RS-485 industrial fieldbus nodes, isolated SPI communication in battery management and motor-drive systems, and isolation of PLC I/O modules in factory automation. Designers should bypass both VCC pins with 0.1 uF and 1 uF ceramic capacitors placed as close to the package as possible, and verify that the logic-side supply domain matches the 1.71 V to 1.89 V narrow range of the low-voltage side. This page adds distributor pricing tiers, drop-in alternatives, and engineering design notes beyond what the manufacturer datasheet provides.
ISO6763FDWR - 6-Ch 5kVrms Digital Isolator 50Mbps | TI
The Texas Instruments ISO6763FDWR is a general-purpose six-channel reinforced digital isolator delivering 50 Mbps signaling rate and 5000 Vrms isolation per UL 1577, housed in a 16-pin SOIC (DW, 7.50 mm width) package. It provides a 3/3 channel configuration (three forward, three reverse channels) with 50 kV/us common-mode transient immunity and support for 1.8V, 2.5V, 3.3V, and 5V CMOS/LVCMOS logic on both sides. A digital isolator is a semiconductor device that transfers digital signals across an isolation barrier using high-frequency carrier-based or edge-based encoding, replacing optocouplers with faster, more reliable, and more power-efficient capacitive isolation. Digital isolators sit within the signal isolation hierarchy of industrial interface components, alongside isolated transceivers and isolated gate drivers, and are fundamental to galvanic isolation in power management and communication systems. Key features of the ISO6763FDWR include the 50 Mbps maximum data rate, a high 50 kV/us CMTI that maintains signal integrity in electrically noisy environments such as motor drives, and reinforced isolation rated to 5000 Vrms per UL 1577 with additional VDE, TUV, CSA, and CQC certifications. The device offers high electromagnetic immunity and low emissions at low power consumption, per the TI ISO676x family datasheet. Architecturally, the ISO676x family uses TI capacitive isolation technology with on-chip transformers formed from SiO2, providing a robust insulation barrier that is resistant to magnetic field interference and field aging, unlike optocoupler LED-based approaches. The F suffix grade of the ISO6763 carries the default default characteristic; the six channels are split symmetrically 3/3, allowing bidirectional signal transfer in a single package without extra components. Typical applications include isolated RS-485 and RS-232 communication links, isolated SPI buses in industrial programmable logic controllers, CAN isolation in factory automation, and battery management systems where multi-bit status signals must cross a safety barrier. When designing with this device, ensure both VCC1 and VCC2 supplies are decoupled with 0.1 uF ceramic capacitors placed close to the pins, and verify that the default output states match the system fail-safe requirements. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
ISO6763FQDWRQ1 - 6-Ch 50Mbps Digital Isolator 5kVrms | TI
The Texas Instruments ISO6763FQDWRQ1 is an automotive-grade, six-channel (3/3 configuration) reinforced digital isolator delivering up to 50 Mbps data rate, 5000 Vrms galvanic isolation per UL 1577, and 100 kV/us common-mode transient immunity, housed in a 16-pin wide-body SOIC (DW) package rated from -40C to +125C. A digital isolator is a semiconductor device that transfers digital signals across an isolation barrier while blocking high voltages, ground loops, and common-mode transients. Within the power and signal-chain hierarchy, it sits between level translators and optocouplers: unlike optocouplers, capacitive or inductive digital isolators provide far higher data rates, tighter channel-to-channel matching, longer lifetime, and lower power consumption, making them the modern choice for galvanic isolation in industrial and automotive systems. Key features include support for 1.8 V, 2.5 V, 3.3 V, and 5 V logic on either side of the barrier, robust EMC performance with 100 kV/us CMTI for harsh motor-drive environments, and a symmetric 3/3 channel arrangement that suits bidirectional buses such as SPI and general-purpose parallel signaling. The automotive Q1 qualification and AEC-Q100-grade temperature range address under-hood and traction-battery requirements. Architecturally, the ISO676x family uses TI's silicon-dioxide isolation barrier with on-chip RF oscillators and data coding to transmit across the capacitive barrier with deterministic propagation delay and high immunity to external fields. The wide-body 16-pin SOIC (DW) package is a pin-to-pin upgrade to older TI generations, easing drop-in redesigns, and its 8 mm creepage/clearage supports reinforced isolation ratings per UL 1577. Typical applications include isolated SPI communication in battery management systems, industrial PLC digital I/O isolation, motor-drive gate-drive supervisory links, and isolated interfaces between microcontrollers and field-side sensors. When designing, keep total data rate within 50 Mbps and verify the supply range on each side independently, since the two sides support different logic levels by design. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ISO7041FDBQR - 4-Channel 2 Mbps Low-Power Digital Isolator | TI
The Texas Instruments ISO7041FDBQR is an ultra-low-power four-channel digital isolator with a 3/1 channel-direction configuration, data rates up to 2 Mbps, 3,000 Vrms reinforced isolation, and a 16-pin SSOP (DBQ) package. It is designed to isolate CMOS or LVCMOS digital signals across high-potential-difference barriers while consuming 116 uA per channel. A digital isolator transfers logic signals between electrically separated domains by placing a reinforced insulation barrier between input and output buffers. Unlike a transformer or relay interface, the ISO7041 uses capacitive silicon-dioxide isolation and edge-based modulation, allowing low power, compact integration, and no external magnetic components. The 3/1 configuration supports three forward channels and one reverse channel, making it suitable for isolated command, feedback, control, and bidirectional communication links. Key verified features include 2.25 V to 5.5 V operation, 2 Mbps maximum data speed, 3000 Vrms isolation, fail-safe output behavior, and common-mode transient immunity listed at 50 kV/us by DigiKey and 100 kV/us by LCSC/JLCPCB. The manufacturer identifies the ISO7041 family for ultra-low-power isolation and ATEX-certified applications, while the ISO7041FDBQR ordering variant uses the 16-pin SSOP DBQ package. The capacitive isolation barrier and integrated digital interfaces are suited to industrial automation, isolated communications, power-conversion control, battery-powered equipment, and test and measurement systems. The low 116 uA/channel supply current is particularly valuable when the isolated side must operate continuously with limited energy budget. Designers should still verify propagation delay, pulse-width distortion, input logic levels, channel direction, and isolation-system safety requirements for the exact operating conditions. The main PCB consideration is keeping the input-side and output-side copper, ground, and external components physically separated according to the manufacturer isolation layout guidance. Decoupling capacitors should be placed close to the relevant supply pins, while the isolation barrier must remain free of unintended copper bridges, coating residue, or low-voltage test points. For a production design, review the complete TI datasheet, package drawings, creepage and clearance requirements, and the relevant certification documentation rather than relying only on distributor summaries. This page combines verified manufacturer and distributor data, application context, package information, design notes, and replacement guidance. Those engineering details help distinguish a genuine isolated interface solution from a generic low-voltage logic IC and support faster sourcing and design decisions for compact, reinforced-isolation systems.
ISO722MD - 150 Mbps Digital Isolator | Texas Instruments
The Texas Instruments ISO722MD is a single-channel high-speed digital isolator supporting signaling rates from 0 Mbps to 150 Mbps, with 2500 Vrms galvanic isolation and 25 kV/µs common-mode transient immunity. It is packaged in an 8-pin SOIC (D) package and operates from 3.3 V and 5 V supplies. The device includes a digital isolator enable function and is designed for high-speed control, communication, and interface isolation. A digital isolator is a semiconductor interface device that transfers a digital signal across an electrically isolated barrier while preventing direct conductive current between the two sides. ISO72x devices use silicon-dioxide insulation to provide galvanic isolation up to 4000 V, as described in the family documentation. This isolation helps protect low-voltage circuitry from high-voltage transients, ground-potential differences, and noise-coupled environments when used with an appropriate isolated power supply. Key features include a maximum signaling rate of 150 Mbps, low propagation delay, low pulse-width distortion, and typical transient immunity of 50 kV/µs according to the family datasheet information. The ISO722MD supports operation across the -40°C to +125°C temperature range and is identified by Texas Instruments as a drop-in replacement for most opto and magnetic isolators. Its failsafe output behavior is important when the isolated link loses input-drive validity. The ISO722MD is suited to industrial control, test and measurement, communications, and power-conversion systems where a high-speed control or data signal must cross an isolation boundary. The enable input allows the output to be controlled during power-up or fault conditions. The 8-SOIC package supports conventional surface-mount assembly, while the isolation rating and transient immunity help simplify compliance-oriented system design. Designers should confirm supply sequencing, input and output logic levels, decoupling, and the isolation-capacitor requirements against the manufacturer datasheet. For systems requiring reinforced isolation, working voltage, creepage, clearance, and applicable safety standards must be evaluated for the complete PCB layout. The ISO722M family documentation also notes that transient protection and propagation delay differ among vendors, so compatibility should not be inferred from package appearance alone.
ISO7241MDW - 4-Ch 3/1 150Mbps Digital Isolator | TI
The ISO7241MDW is a quad-channel digital isolator from Texas Instruments, featuring a 3/1 channel configuration (three forward and one reverse) with a signaling rate of 150 Mbps. It is housed in a 16-pin SOIC (DW) package with a wide body (7.50 mm width). The device provides galvanic isolation up to 2500 Vrms and a common-mode transient immunity (CMTI) of 25 kV/µs, making it suitable for industrial and automotive applications where robust isolation is required. Digital isolators are components that transfer digital signals across an isolation barrier while preventing DC current flow and rejecting common-mode noise. They are essential in systems where safety, noise immunity, or ground potential differences exist between circuit domains. The ISO7241MDW uses a silicon-dioxide (SiO2) isolation barrier, which offers high reliability and long-term stability. It is part of the ISO7240x/ISO7241x/ISO7242x family of quad-channel isolators, which provide various channel configurations and output-enable functions. Key features of the ISO7241MDW include a low channel-to-channel output skew of 1 ns maximum, low pulse-width distortion (PWD) of 2 ns maximum, and low jitter content of 1 ns typical at 150 Mbps. The device operates over a wide supply voltage range of 3.0 V to 5.5 V on both sides, and it is specified for the industrial temperature range of -40°C to +125°C. The output-enable function allows the outputs to be placed in a high-impedance state, facilitating bus-oriented applications. The ISO7241MDW is designed for high-speed signal isolation in applications such as industrial fieldbus communication, motor control, power inverters, and isolated SPI/UART interfaces. Its high CMTI ensures reliable operation in noisy environments, and the 2500 Vrms isolation rating meets basic insulation requirements for many industrial standards. The device is RoHS compliant and lead-free, supporting environmentally conscious designs. When designing with the ISO7241MDW, it is important to provide adequate decoupling capacitors on both supply pins and to ensure proper PCB layout to maintain signal integrity and isolation performance. The device does not require external components for the isolation barrier, simplifying the design. For applications requiring higher isolation or different channel configurations, other members of the ISO724x family can be considered.
ISO7721BDWR - 2Ch Reinforced Digital Isolator | TI
The ISO7721BDWR is a high-speed, robust EMC, reinforced dual-channel digital isolator from Texas Instruments. It provides 5000 Vrms isolation per UL 1577, with a data rate of 100 Mbps and common-mode transient immunity (CMTI) of 85 kV/µs. The device is available in a 16-pin SOIC (DW) package with 7.50 mm width, operating over a temperature range of -55°C to +125°C. It is designed for applications requiring reliable signal isolation in industrial, automotive, and communication systems. Digital isolators are components that transmit digital signals across an isolation barrier, providing galvanic isolation to protect circuits and users from high voltages, ground loops, and noise. They are essential in systems where safety and signal integrity are critical, such as in motor drives, power supplies, and medical equipment. The ISO7721BDWR belongs to the ISO772x family, which includes reinforced and basic insulation variants, offering flexibility for different isolation requirements. Key features of the ISO7721BDWR include its reinforced insulation rating, 100 Mbps data rate, and 85 kV/µs CMTI, which ensures reliable operation in noisy environments. The device supports CAN, RS232, and RS485 protocols, making it versatile for industrial communication. It also features low power consumption and a wide supply voltage range, enhancing its suitability for power-sensitive designs. Technically, the ISO7721BDWR uses TI's capacitive isolation technology, which provides robust performance against magnetic interference and ensures long-term reliability. The device has a channel configuration of 1/1 (one forward, one reverse), allowing bidirectional communication. It also includes an enable pin for power management and failsafe outputs for safety-critical applications. Typical applications include industrial fieldbus communication, isolated SPI/UART interfaces, motor control, and power converters. The high CMTI and reinforced isolation make it ideal for harsh environments where voltage transients are common. When designing with the ISO7721BDWR, ensure proper PCB layout with adequate creepage and clearance distances to maintain the isolation rating. Place decoupling capacitors close to the power pins and follow the recommended layout guidelines in the datasheet to achieve optimal EMC performance.