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ADM234LAR

ADM234LAR - 4/4 5V RS-232 Interface | Analog Devices

The Analog Devices ADM234LAR is a 5 V-powered CMOS RS-232 interface IC containing four drivers and four receivers, supporting data rates up to 120 kB/s in a 20-lead SSOP package. It is designed for single-supply equipment that must communicate with legacy RS-232 ports using EIA-232-E and V.28-compatible signaling. An RS-232 interface IC is a transceiver within the broader interface-IC and data-communication semiconductor hierarchy. It converts low-voltage CMOS logic into RS-232-compatible line levels and converts incoming RS-232 signals back into CMOS logic. The ADM234LAR integrates this bidirectional conversion so a system can connect a UART, microcomputer, or embedded controller to a serial port without implementing discrete charge-pump and level-shifting circuits on the PCB. Key features include a single 5 V power supply, 120 kB/s data rate, onboard DC-DC converters, approximately 9 V output swing from a 5 V supply, and support for 1 µF charge-pump capacitors. Low-power shutdown is also listed, while the receivers remain active during shutdown. A 30 V receiver-input rating provides additional tolerance for exposed serial connections. The integrated DC-DC converter allows the drivers to generate the positive and negative voltage swings required by RS-232 without a negative supply rail. This simplifies system power architecture, although external charge-pump capacitor selection, layout, and ripple behavior remain important. The four-driver/four-receiver arrangement consolidates multiple serial channels in one package and can reduce board area when compared with separate single-channel transceivers. Typical applications include industrial serial controllers, data-logging equipment, instrumentation, point-of-sale systems, embedded control panels, and legacy peripheral connectivity. The ADM234LAR is particularly useful where the host logic operates from 5 V but the external cable interface requires bipolar RS-232 levels. Designers must still account for cable length, common-mode voltage, ground noise, and protection requirements. The principal layout consideration is keeping charge-pump and high-voltage driver paths compact while maintaining adequate separation from sensitive logic. Place the specified capacitors close to their associated pins, use a low-inductance ground return, and route protected connector-side traces away from clocks, analog inputs, and precision references. A solid ground plane and short return path help reduce RS-232 return-current effects. This product page combines the verified ADM234LAR feature data with package guidance, application analysis, comparison criteria, and design notes. Because verified pricing, exact pin functions, operating-temperature limits, and several electrical limits were not included in the supplied records, those fields are marked for confirmation rather than inferred from unrelated parts.

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ADM234LJR

ADM234LJR - 5V CMOS RS-232 Drivers/Receivers | Analog Devices

The Analog Devices ADM234LJR is a 5 V-powered CMOS RS-232 line driver and receiver integrated circuit designed for EIA-232-E and V.28 communication interfaces. It provides four drivers and four receivers in a 16-lead SOIC package, supporting operation from a single 5 V supply while producing approximately 9 V RS-232 output swing. The device includes on-board DC-DC converters, allowing ±12 V RS-232-level signaling without an external dual supply. According to the manufacturer datasheet, the interface supports data rates up to 120 kB/s, includes low-power shutdown, and provides approximately 1 F charge-pump capacitors. The ADM234LJR is suitable for industrial equipment, instrumentation, data acquisition, and embedded serial links where a single 5 V rail must connect to an RS-232 transceiver port. Its CMOS implementation targets low power consumption and compact PCB area compared with discrete RS-232 interface designs. The 16-pin SOIC package is available in commercial temperature-grade product ordering and is identified by the ADM234LJR part number. Designers should account for RS-232 cable length, signal polarity, grounding, and the voltage limits of the connected equipment when deploying this interface. The internal charge-pump architecture simplifies the power-supply arrangement, but external bypass and charge-pump capacitors remain necessary according to the datasheet application guidance.

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ADM235LJN

ADM235LJN - 5V RS-232 Transceiver | Analog Devices

The Analog Devices ADM235LJN is a single-supply CMOS RS-232 line driver and receiver with a 5 V power supply, 120 kB/s data rate, and onboard DC-DC converters. The integrated converters produce a 9 V output swing without requiring external ±12 V supplies, while the device is housed in a 24-pin PDIP package measuring 0.600 inch, or 15.24 mm, across the lead span. An RS-232 transceiver is an interface IC that combines a transmitter and receiver for serial data links using differential voltage signaling. It belongs to the RS-232 line transceiver and interface IC hierarchy, where EIA-232-E and V.28 define the electrical behavior expected by compatible computer and industrial equipment. The ADM235LJN is intended for systems that need an RS-232 port but cannot conveniently provide both positive and negative supply rails. Key features include operation from one 5 V supply, onboard DC-DC conversion, 120 kB/s data throughput, a 9 V output swing, and support for low-power shutdown. The receivers remain active during shutdown and tolerate input voltages to 30 V. These characteristics make the device useful when an existing embedded system must deliver conventional RS-232 levels from a single low-voltage rail. The internal charge-pump and DC-DC circuitry eliminates the external negative supply normally associated with older RS-232 implementations. A 9 V output swing provides useful margin against the RS-232 voltage thresholds, while the 30 V receiver input rating helps protect the interface when connected to exposed or longer cables. Receiver and driver performance should still be evaluated against the system’s grounding and noise environment. Typical applications include industrial control consoles, POS terminals, service equipment, data acquisition systems, and embedded instrumentation. The device is especially appropriate where a 5 V logic rail is available but a separate negative voltage rail would increase power-supply complexity or reduce reliability. Cable length and data rate must be considered when designing the physical link. For implementation, place the device close to the RS-232 connector and keep the unprotected transceiver-side traces away from sensitive analog and high-speed digital signals. Verify bypass-capacitor placement and grounding against the manufacturer application guidance. The 24-pin PDIP format favors through-hole assembly and prototype or industrial equipment where a socket or leaded component is appropriate. This page organizes the electrical capabilities, interface use cases, comparison points, and implementation considerations of the ADM235LJN. It also distinguishes true package-level replacement options from related RS-232 devices that require different supplies, different packages, or different interface functions.

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ADM236LAN

ADM236LAN - 5V 4/3 RS-232 Transceiver | Analog Devices

Analog Devices ADM236LAN is a 5 V powered CMOS RS-232 interface transceiver with four drivers, three receivers, 120 kB/s data rate, and on-board DC-DC converters in a 24-pin PDIP package. The single-supply design produces a 9 V output swing from a 5 V supply, while small 1 F capacitors support the on-board converters. Low-power shutdown keeps the receivers active, and the receiver inputs tolerate voltages up to 30 V. A CMOS RS-232 transceiver is an interface IC that converts digital logic levels into RS-232 line levels and converts incoming RS-232 signals back into logic-compatible levels. It belongs to the interface IC hierarchy, where transceiver ICs bridge low-voltage digital systems and older, high-voltage serial interfaces. The ADM236LAN combines transmit and receive functions in one device, reducing the number of separate line-interface components required by an RS-232 port. Key features include compliance with EIA-232-E and V.28 specifications, operation from one 5 V supply, a 120 kB/s maximum data rate, and four transmitters with three receivers. The integrated DC-DC converters eliminate the need for a separate negative supply rail and permit approximately 9 V output swing. The shutdown function reduces power use when the interface is inactive, while the always-active receivers can continue detecting incoming data. The device uses CMOS drivers and receivers to combine RS-232 signal conditioning with modern low-power logic interfacing. Its 1 F charge-pump capacitors support the on-board converters, and the 30 V receiver input rating provides margin for exposed serial ports. Designers should still protect the driver outputs against sustained overvoltage, electrostatic discharge, and uncontrolled cable transients according to the system-level requirements. Typical uses include industrial equipment, laboratory instruments, data acquisition systems, legacy controller ports, configuration interfaces, and service equipment requiring a compact RS-232 connection. The four-driver capability allows multi-channel arrangements, while three receiver channels support monitoring or handshake signals. It is particularly useful where a modern controller must communicate with equipment that retains an RS-232 interface. A key design consideration is that the ADM236LAN operates from 5 V, but its RS-232 driver outputs still use elevated voltage levels generated internally. Place the 1 F converter capacitors and interface-protection components close to their associated pins, keep the converter loop compact, and provide suitable return paths for high-current driver transitions. This page consolidates verified manufacturer and distributor information, same-package alternatives, technical comparisons, and practical integration guidance. It also distinguishes documented electrical characteristics from parameters that require confirmation against the current Analog Devices datasheet before a new design is released.

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ADM236LJN

ADM236LJN - 4/3 5V RS-232 Transceiver | Analog Devices

Analog Devices ADM236LJN is a 4-driver, 3-receiver CMOS RS-232 interface transceiver operating from a single 5 V supply at data rates up to 120 kB/s, housed in a 24-pin DIP package. The integrated DC-DC converter produces approximately 9 V signal swings without requiring external ±12 V rails, while onboard 1 uF charge-pump capacitors simplify the application circuit. A CMOS RS-232 transceiver is an interface IC that converts logic-level signals into RS-232-compatible voltage levels and converts received RS-232 signals back into logic levels. In the interface hierarchy, it belongs to the RS-232 transceiver category, then to communications interface ICs, then to broader interface and semiconductor families. It is useful wherever two systems must exchange serial data across a noise-prone, unbalanced cable using the EIA-232-E and V.28 signaling specifications. Key features include a single 5 V power supply, four drivers, three receivers, a maximum data rate of 120 kB/s, an approximately 9 V output swing, and receiver input levels extending to 30 V. Low-power shutdown is supported, and the receivers remain active in shutdown according to the supplied family data. The interface also offers ESD protection greater than 2 kV and is described as latch-up free. The ADM236L family uses onboard charge-pump circuitry to generate the bipolar voltage required by RS-232 drivers from a single positive supply. This architecture removes the external ±12 V requirement common to older RS-232 implementations. A 4-to-3 driver and receiver arrangement suits asymmetric links, including systems that transmit on several lines but receive data on a smaller number of channels. Typical uses include industrial control links, point-of-sale equipment, instrumentation, data acquisition, and embedded serial ports where a 5 V system cannot provide ±12 V. The 120 kB/s capability is suitable for moderate-speed control and data-transfer channels rather than high-bandwidth protocols. Its DIP-24 package is also appropriate for through-hole legacy and industrial boards. Designers should provide the datasheet-specified 1 uF capacitors, route the charge-pump and interface connections according to the manufacturer's application guidance, and keep RS-232 routing away from sensitive analog signals. Confirm supply tolerance, transceiver direction, and connector-level protection against the actual board requirements before production use. This page combines verified manufacturer-family specifications, distributor availability information, structured comparison data, and practical integration guidance. It distinguishes package-level replacement constraints from merely similar RS-232 devices, helping engineers avoid substitutions that require pinout, channel-count, or board-layout changes.

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ADM236LJR

ADM236LJR - 5V 120kbps RS-232 Transceiver | Analog Devices

Analog Devices ADM236LJR is a +5 V powered CMOS RS-232 drivers/receivers interface IC with a 120 kB/s data rate, 9 V output swing, and a 20-pin SOIC package. It integrates three drivers and three receivers with on-board DC-DC converters, allowing EIA-232-E and V.28 communications from a single 5 V supply without external +12 V and -12 V rails. The device also supports low-power shutdown below 5 µW and provides small 1 µF charge-pump capacitors. An RS-232 transceiver is an interface IC that combines line drivers, line receivers, and voltage-level translation for serial communications. In the product hierarchy, it belongs to interface ICs, data converters and interface devices, and semiconductor components. The ADM2xx family is intended for systems where conventional negative supply voltages are unavailable. The integrated converter approach reduces board complexity by producing bipolar RS-232 levels internally while the external system operates from 5 V. Key features include a maximum stated data rate of 120 kB/s, on-board DC-DC conversion, approximately 9 V output swing from a 5 V supply, and 1 µF external charge-pump capacitors. The low-power shutdown function reduces power dissipation to less than 5 µW, making the interface suitable for portable and power-conscious equipment. Two receivers remain active during shutdown, allowing selected incoming signals to be monitored while most of the transceiver is inactive. The receiver input withstands voltages up to 30 V, providing protection in industrial environments where connected equipment can present larger voltage excursions. The manufacturer datasheet also states that the drivers maintain approximately ±5 V signal levels at data rates up to 100 kbps under worst-case loading. These characteristics make the ADM236LJR useful where a compact, single-supply RS-232 connection is required without relying on an external bipolar power supply. Typical applications include industrial serial-port equipment, point-of-sale terminals, data acquisition systems, test and measurement instruments, security-system controllers, and battery-powered communication equipment. Designers should verify line capacitance, cable length, driver loading, and receiver input levels against the application’s EIA-232-E requirements. The shutdown-control logic and the behavior of the two always-active receivers should also be checked to ensure they meet the system power-management sequence. For a robust layout, place the 1 µF charge-pump capacitors close to their associated IC pins and keep the high-voltage driver outputs away from sensitive input traces. Confirm that the external supply remains stable during data transmission, and account for the positive temperature coefficient of RS-232 thresholds when designing across the full operating environment. The exact pin names, package dimensions, and full electrical limits should be confirmed against the official Analog Devices datasheet before layout release. This page combines the verified Analog Devices datasheet information, current distributor availability, same-package alternatives, and practical design guidance. It highlights the ADM236LJR’s single-supply operation, integrated DC-DC conversion, shutdown behavior, and interface trade-offs in a format intended for component selection and PCB design decisions.

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ADM237LJR

ADM237LJR - 5V 5-Driver 3-Receiver RS-232 | Analog Devices

Analog Devices ADM237LJR is a 5 V powered CMOS RS-232 driver/receiver transceiver with five drivers, three receivers, and a 24-SOIC package. It operates from a single 5 V power supply, supports data rates up to 120 kB/s, and provides 9 V output swing using onboard DC-DC converters. The device is designed for systems that require RS-232 communication without externally supplied positive and negative voltage rails. An RS-232 interface transceiver belongs to the communications IC hierarchy and combines digital line-driver and receiver functions with the voltage conversion needed for unbalanced point-to-point serial links. The ADM237LJR is a multichannel variant intended to reduce the number of interface packages required in industrial control, instrumentation, data acquisition, and embedded systems. Its five-driver and three-receiver organization supports asymmetric channel counts where several devices transmit and fewer devices receive data. Key features include single 5 V operation, compliance with EIA-232-E and V.28 specifications, a maximum data rate of 120 kB/s, onboard DC-DC converters, and a 9 V output swing from a 5 V supply. The advertised 1 µF charge-pump capacitor requirement helps keep the external component count low. Low-power shutdown is supported, while the receivers remain active during shutdown according to the supplied manufacturer and distributor information. The integrated charge-pump architecture raises the 5 V supply to the bipolar voltage levels required by RS-232 drivers. This architecture eliminates a separate external power supply for positive and negative transceiver rails, although the internal converters, driver output swing, receiver thresholds, and supply noise still require careful PCB treatment. With three receivers receiving up to 30 V input, the receive network must be protected from excessive voltage and ESD exposure. Typical uses include multi-channel RS-232 test equipment, industrial data-acquisition controllers, serial port expanders, point-of-sale terminals, communications adapters, and embedded control systems. A design with more than three receive endpoints should account for the receiver-count limitation, while a design requiring more than five transmit endpoints needs another transceiver or a different channel configuration. Place the charge-pump capacitors and interface bypass capacitors close to their specified pins, and route each RS-232 driver and receiver as a separate routed signal rather than through shared buses. Confirm connector-level transient protection and chassis grounding separately from logic-side protection because the ADM237LJR is not a surge-protection device. This product page consolidates the verified manufacturer description, distributor pricing, channel configuration, package information, interface characteristics, and practical replacement guidance. It also distinguishes a true same-package alternative from related devices that differ in package, channel count, or interface function, preventing a functionally similar part from being presented as an unqualified drop-in replacement.

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ADM238LAN

ADM238LAN - 120 kbps 4/4 RS-232 Transceiver | Analog Devices

The Analog Devices ADM238LAN is a 4/4 full-duplex RS-232 transceiver with four drivers and four receivers, a 120 kB/s data rate, and a single 5 V supply in a 24-pin PDIP package. Its integrated DC-DC converters generate the bipolar voltage required by RS-232 drivers from one 5 V input, while four external 1 uF capacitors support the charge-pump circuitry. According to the manufacturer product information, the device provides a 9 V output swing with a 5 V supply, low-power shutdown, receiver operation in shutdown, and receiver input levels extending to 30 V. An RS-232 transceiver is an interface IC that combines line drivers and receivers for serial data links using the EIA-232-E and V.28 standards. It belongs to the broader interface IC hierarchy and converts between low-voltage digital logic levels and the bipolar voltage swings used on an RS-232 cable. The ADM238LAN is especially useful when a system has only a 5 V supply but requires full-duplex RS-232 connectivity rather than single-direction or unbalanced logic-level signaling. The four drivers provide transmit-side level shifting, while the four receivers support independent receive channels. A 120 kB/s maximum data rate suits industrial equipment, data acquisition systems, service interfaces, embedded controllers, and legacy peripheral connections. The single-supply architecture reduces external power complexity compared with traditional RS-232 designs that require positive and negative supplies, while the onboard converters preserve the bipolar signaling required at the cable interface. The ADM238LAN family meets EIA-232-E and V.28 requirements and supports a data rate up to 120 kB/s. Its advertised 9 V output swing is adequate for reliable RS-232 signaling in noise-prone industrial environments, and the 30 V receiver input rating provides additional protection against excessive interface voltage. The integrated shutdown function can reduce consumption when the interface is not needed, although applications must account for the device-specific shutdown and receiver-enable timing shown in the manufacturer datasheet. Typical applications include multi-port RS-232 connections in industrial controllers, laboratory instrumentation, point-of-sale equipment, telecommunications equipment, and embedded systems requiring four transmit and four receive channels. Because the device is a 4/4 transceiver, it supports full-duplex links and can handle bidirectional traffic without separate driver and receiver packages. The 24-pin PDIP package also facilitates prototyping and through-hole service access where fine-pitch surface-mount assembly is undesirable. The principal design consideration is the external charge-pump capacitor network. Use the required 1 uF capacitors with close PCB placement, observe the stated polarity, and route the high-voltage driver outputs away from sensitive logic and clock lines. Confirm the transceiver’s shutdown behavior in the system power sequence, especially when receivers must remain active while drivers are disabled. This page combines the manufacturer’s ADM238L product information with interface-family specifications and practical selection guidance. It distinguishes pin-compatible family options from related devices with different driver or receiver counts and highlights the ADM238LAN’s 120 kB/s, four-channel, single-supply architecture for engineers designing robust RS-232 links.

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ADM238LAQ

ADM238LAQ - 4/4 RS-232 Transceiver, 120 kB/s | Analog Devices

The Analog Devices ADM238LAQ is a four-driver, four-receiver RS-232 transceiver designed for single 5 V operation in a 24-lead ceramic DIP package. It supports data rates up to 120 kB/s, provides on-board DC-DC converters, and uses 1 uF capacitors for charge-pump operation. The device meets EIA-232-E and V.28 specifications while delivering a 9 V output swing from a 5 V supply. These characteristics make the ADM238LAQ suitable for industrial control, instrumentation, data acquisition, and legacy serial-port interfaces that require four RS-232 channels without external transmit voltage conversion. An RS-232 transceiver is an interface integrated circuit that combines line drivers and line receivers for bidirectional or unidirectional serial communication. It belongs to the interface IC hierarchy, converting between low-voltage CMOS logic levels and the positive and negative voltage levels used by RS-232 links. The ADM238LAQ provides four driver channels and four receiver channels, allowing one package to support several data paths or to provide transmit-only and receive-only groups on the same board. Key features include a single 5 V power supply, operation to 120 kB/s, integrated DC-DC converters, a 9 V output swing, and low-power shutdown with receivers remaining active. The receiver input withstands voltages up to 30 V according to the product information. A 1 uF charge-pump capacitor requirement and integrated conversion circuitry reduce the external component count compared with discrete RS-232 implementations. The 24-CDIP package is 0.300 inches wide, or 7.62 mm. Technically, the device integrates four CMOS RS-232 drivers, four receivers, and the supporting charge-pump converters needed to generate bipolar output levels from one 5 V rail. This architecture suits equipment with multiple asynchronous serial ports, including test systems, industrial controllers, service interfaces, and data-logging equipment. Shutdown behavior is especially useful for systems where transmitters must stop driving while incoming data must still be monitored. Typical applications include four-channel RS-232 instrument control, factory automation equipment with multiple serial links, legacy peripheral connections, and embedded control systems that retain an RS-232 interface. The 120 kB/s rate is substantially faster than the original 20 kB/s RS-232 target, although actual application throughput remains constrained by protocol overhead and cable characteristics. A key design consideration is the ceramic DIP footprint: unlike a surface-mount alternative, it requires through-hole insertion and adequate spacing for assembly and service. Designers should preserve the pinout assigned to the 24-CDIP variant, validate signal levels at the connector, and confirm that the selected charge-pump capacitors meet the manufacturer's stability and temperature requirements. This page consolidates the confirmed electrical characteristics, package information, interface use cases, and design considerations for engineers evaluating the ADM238LAQ as a four-channel RS-232 interface solution.

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ADM238LJN

ADM238LJN - 4/4 120kbps RS-232 IC | Analog Devices

Analog Devices ADM238LJN is a 4/4 full-duplex RS-232 line-driver and receiver interface IC with a 120 kB/s data rate, single 5 V power supply, and 24-pin PDIP package. It provides four transmit drivers and four receive channels, producing approximately 9 V output swing from the 5 V supply through on-board DC-DC converters. The device targets EIA-232-E and V.28 serial interfaces where a ±12 V supply is unavailable. An RS-232 transceiver is an interface IC that combines differential digital signaling levels with a single logic-level supply. In the broader electronics hierarchy, the ADM238LJN belongs to the interface IC class, specifically the RS-232 transceiver family. Its integrated DC-DC converter generates the higher voltage needed for RS-232 driver outputs while the receiver circuitry restores serial data to compatible logic levels. The ADM238LJN's principal features include a 120 kB/s data rate, 9 V output swing, 1 F charge-pump capacitors, a low-power shutdown function, and receivers that remain active during shutdown. A 1 A receiver output capability supports the stated receiver-load condition, while the 30 V receiver-input rating provides additional tolerance for exposed serial lines. These characteristics simplify legacy and industrial RS-232 connections without requiring a separate negative supply rail. The device is intended for EIA-232-E and V.28 communications interfaces, including industrial equipment, instrumentation, data-acquisition systems, service consoles, and legacy peripheral connections. Four full-duplex channels allow one connector to carry four data paths in each direction. Its 120 kB/s rate is suitable for conventional serial control and communication links rather than high-speed differential or Ethernet protocols. PCB design must preserve the RS-232 interface requirement for a single 5 V supply even though driver outputs swing to approximately 9 V. Place the specified 1 F capacitors close to the charge-pump pins, route driver outputs away from sensitive receiver and logic traces, and maintain the 24-pin PDIP footprint without changing the land pattern. Review the receiver input rating before connecting externally accessible lines. The ADM238LJN is listed as obsolete, so availability may be limited. This page synthesizes the device specifications, sourcing guidance, drop-in comparison, application guidance, and design considerations that engineers need when supporting an installed ADM238LJN design.

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ADM238LJR

ADM238LJR - 4/4 5V RS-232 Transceiver | Analog Devices

The Analog Devices ADM238LJR is a four-driver, four-receiver RS-232 transceiver powered by a single 5 V supply and packaged in a 24-pin SOIC. It supports data rates up to 120 kB/s, provides approximately 9 V driver output swing from the 5 V supply, and operates with 1 uF capacitors according to the manufacturer feature summary. The device is designed for EIA-232-E and V.28 interfaces where traditional positive and negative ±12 V supplies are unavailable. An RS-232 transceiver is an interface IC that combines differential signaling drivers and receivers for point-to-point serial communication. The ADM238LJR belongs to the RS-232 interface transceiver category, where the transmitter converts logic-level signals into RS-232-compatible levels and the receiver converts those levels back into CMOS-compatible signals. Its four independent channels support bidirectional data paths in equipment requiring more than one serial connection. The integrated DC-DC converter allows the IC to generate the positive and negative voltages needed by RS-232 drivers from one 5 V supply. This reduces external power-supply complexity while preserving the required bipolar signaling levels. The manufacturer lists approximately 9 V output swing, low-power shutdown, receivers that remain active during shutdown, and 1 uF external capacitors as key operating characteristics. The ADM2xx family supports EIA-232-E and V.28 communications interfaces, and the driver architecture is designed for data transmission beyond the formal EIA-232-E rate. The ADM238LJR combines four transmit channels and four receive channels in one device, making it suitable for console links, instrumentation, industrial control equipment, and legacy peripheral connectivity. A single IC can serve multiple RS-232 ports while centralizing supply and decoupling requirements. Common application areas include industrial controllers, test and measurement equipment, point-of-sale terminals, security systems, and embedded systems that retain an RS-232 interface. The 24-pin SOIC package is suitable for conventional surface-mount PCB assembly. Designers should maintain the required charge-pump capacitor connections and place bypass and charge-pump capacitors close to their associated pins according to the manufacturer datasheet layout guidance. The principal design trade-off is that its four-driver, four-receiver arrangement is more specialized than single-channel transceivers. It provides higher channel density and simpler 5 V-only power design, but applications needing only one RS-232 link may not use every channel. Input protection, cable length, grounding, and data-rate limits must be evaluated against the EIA-232-E and V.28 interface requirements. This page organizes the ADM238LJR specifications, pin-compatible family alternatives, application guidance, and comparison criteria to support component selection and PCB planning. It also identifies the documentation and electrical details that require confirmation in the Analog Devices data sheet before production release.

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ADM239LAN

ADM239LAN - 5V 3/5 RS-232 Transceiver | Analog Devices

The Analog Devices ADM239LAN is a 5 V powered CMOS RS-232 transceiver combining three drivers and five receivers in a 24-pin PDIP package. It supports data rates up to 120 kB/s, meets the EIA-232-E and V.28 specifications cited in the manufacturer documentation, and provides an on-board DC-DC converter that produces a 9 V output swing from the single 5 V supply. These characteristics make the ADM239LAN useful for industrial equipment, data acquisition systems, and service interfaces where a compact multichannel RS-232 solution is required. An RS-232 transceiver is an interface IC that translates between complementary logic-level signals and the voltage levels defined by the EIA-232 standard. A transmitter converts logic data into RS-232 line signals, while a receiver converts incoming line signals back into CMOS-compatible data. In the broader semiconductor hierarchy, the ADM239LAN is a line driver and receiver, then an interface transceiver, and ultimately an interface IC. Its three transmitters permit three outgoing data channels, while its five receivers provide five incoming channels. The principal features of the ADM239LAN are its single 5 V supply operation, 120 kB/s data rate, integrated DC-DC conversion, approximately 9 V output swing, low-power shutdown capability, and receiver operation during shutdown. The integrated DC-DC converter eliminates the need for a separate external RS-232 charge-pump supply in applications where the 5 V system rail is already available. The shutdown function can reduce consumption when the interface is not actively communicating. The verified manufacturer-related search information identifies the ADM239LAN as a 5 V powered CMOS RS-232 driver and receiver device and confirms the 3/5 channel arrangement through the available comparison result. The listed package is 24-pin PDIP, which provides a through-hole footprint with widely spaced leads for easier inspection and assembly. Detailed pin names, receiver input thresholds, supply-current limits, and operating-temperature limits were not included in the supplied verification data and therefore are not inferred here. Typical uses include multiport industrial controller connections, laboratory instrument control, point-of-sale equipment, and embedded systems that need several RS-232 channels sharing one logic-level supply. The integrated DC-DC approach is particularly useful where board space is constrained. System designers should still account for the higher line-side voltage, maintain appropriate RS-232 grounding, and verify transient protection for cables connected to external equipment. This page combines the verified ADM239LAN specifications, package information, purchasing-source links, interface application guidance, and a conservative drop-in replacement assessment. It distinguishes electrically similar family members from alternatives that require a different package or an engineering review, helping engineers avoid assuming that a similar RS-232 device is pin-compatible.

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ADM239LAR

ADM239LAR - 5V RS-232 Interface with DC-DC | Analog Devices

Analog Devices ADM239LAR is a 5 V powered CMOS RS-232 drivers and receivers IC with 3 driver channels, 5 receiver channels, 120 kB/s data rate, and an on-board DC-DC converter. It is packaged in a 24-lead SOIC measuring 0.295 inch, or 7.50 mm, wide. The device also provides low-power shutdown, 1 μF charge-pump capacitors, 9 V output swing from a 5 V supply, and receiver inputs rated to 30 V. An RS-232 transceiver is an interface IC that converts logic-level digital signals into differential, bipolar RS-232 signals and converts received RS-232 signals back into CMOS logic levels. The RS-232 transceiver belongs to the serial-interface hierarchy, which includes interface ICs, line drivers and receivers, communication transceivers, and broader data-communication semiconductors. It is designed for equipment-to-equipment communication over cables where voltage levels exceed ordinary CMOS input and output ranges. The ADM239LAR's principal advantages include operation from one 5 V supply, compliance with EIA-232-E and V.28 specifications, a maximum data rate of 120 kB/s, and an integrated DC-DC converter that generates the elevated RS-232 output voltage. Its 9 V output swing provides useful noise margin over the approximately 2 V RS-232 transition region. Low-power shutdown reduces consumption when the interface is not required, while the receiver remains active during shutdown. The integrated charge-pump circuit develops the bipolar transmitter voltage required by RS-232 from the single 5 V supply. The manufacturer datasheet specifies small 1 μF capacitors for the charge-pump circuit. Three transmitters provide enough channels for common control, status, and data paths, while five receivers allow the opposite direction of the link to carry several signals. The CMOS implementation supports integration into systems that already operate from 5 V rather than requiring the additional negative supply traditionally associated with RS-232. Typical uses include industrial control links, point-of-sale equipment, test and measurement instruments, data-acquisition systems, and embedded equipment interfaces. In each case, the ADM239LAR can translate between a 5 V controller and an external RS-232 port. The 120 kB/s rate is suitable for moderate-speed serial links, while the integrated DC-DC converter simplifies implementation where only a positive 5 V rail is available. The main design consideration is external line protection. Although the receiver input is specified to 30 V, exposed RS-232 ports may encounter larger transients or incorrect polarity. Appropriate surge and ESD protection should be added where the cable environment requires it, and unused driver outputs should be handled according to the manufacturer recommendations. This page consolidates the verified ADM239LAR specifications, sourcing information, procurement details, interface-application guidance, and data gaps that are not resolved by the supplied manufacturer and distributor records.

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ADM239LJR

ADM239LJR - 120 kB/s 5V RS-232 Interface | Analog Devices

The Analog Devices ADM239LJR is a 5 V powered CMOS RS-232 driver and receiver interface IC with three transmitters, five receivers, a 120 kB/s data rate, on-board DC-DC converters, and a 24-pin SOIC wide package. It supports low-power shutdown while maintaining active receivers, produces a 9 V output swing from a 5 V supply, accepts receiver inputs up to 30 V, and uses small 1 µF capacitors. An RS-232 interface transceiver is a physical-layer integrated circuit that converts logic-level signals into RS-232-compatible voltage levels and converts received RS-232 signals back into CMOS-compatible levels. The ADM239LJR belongs to the line-driver and line-receiver hierarchy, which falls within interface ICs and broader digital and analog semiconductors. Its integrated charge-pump DC-DC converters provide the voltage needed for bipolar RS-232 output drive without requiring a separate 12 V supply. Key features include a single 5 V power supply, compliance with the EIA-232-E and V.28 specifications cited in the retrieved datasheet listing, a 120 kB/s data rate, and three drivers with five receivers. The on-board converters produce a 9 V output swing with a 5 V supply. Low-power shutdown reduces consumption when the interface is not needed, while 1 A receivers remain active during shutdown. The receiver input withstands voltages up to 30 V. The device combines a multichannel RS-232 line interface with internal power-conversion circuitry, reducing the number of external supply rails required by the board. Its CMOS implementation and specified 9 V swing target systems that must bridge short-distance, point-to-point serial links through single-ended RS-232. The combination of three drivers, five receivers, and shutdown behavior supports compact communications equipment where multiple serial lines and power conservation are important. Typical uses include industrial serial-port adapters, data-acquisition equipment, point-of-sale terminals, embedded control consoles, and instrumentation requiring RS-232 connectivity from a 5 V system. A transmitter converts outgoing UART or peripheral logic into RS-232 levels, while the five receivers allow multiple incoming lines to be monitored. The 120 kB/s rate is suitable for many legacy serial-control and data-transfer tasks when paired with a compatible UART and protocol. Designers should verify the external charge-pump capacitor values, UART signal levels, connector protection, and shutdown-state behavior against the Analog Devices datasheet before layout release. Keep RS-232 traces away from sensitive analog and high-speed digital paths, provide the specified bypass capacitance at the supply pins, and account for the 30 V receiver input limit when exposed to industrial wiring or ESD events. This page consolidates the verified ADM239LJR features, current distributor pricing references, package information, application guidance, and a transparent assessment of available drop-in alternatives. It also distinguishes documented device capabilities from fields not supplied by the retrieved sources, preventing unverified electrical claims from being presented as manufacturer specifications.

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ADM242AN

ADM242AN - 200 kB/s 5 V RS-232 Transceiver | Analog Devices

The Analog Devices ADM242AN is a 200 kB/s, 5 V RS-232 line transceiver with two drivers and two receivers in an 18-pin PDIP package. It uses an on-chip charge pump with 0.1 µF external capacitors to develop bipolar RS-232 levels, provides a 9 V output swing from a 5 V supply, and accepts receiver inputs up to 30 V. An RS-232 transceiver is an interface IC that combines voltage conversion, line drivers, and line receivers between CMOS-compatible logic and a differential-style, bipolar serial communications port. In the hierarchy of electronics, the ADM242AN belongs to interface ICs and data-interface converters, using charge-pump-assisted level shifting rather than an external negative power supply. The ADM242 family is designed for high-speed RS-232 links operating up to 200 kB/s from a single 5 V supply. Its two-driver, two-receiver arrangement supports full-duplex point-to-point communication, while the 9 V output swing and 30 V receiver input range provide useful margin for standard RS-232 implementations. The 0.1 µF charge-pump capacitors keep the external power-supply requirement compact. The device is identified as an EIA-232-E and V.28-compatible RS-232 interface in the verified manufacturer and distributor material. Its CMOS-based implementation avoids a separate external negative supply and integrates the charge-pump circuitry required to generate bipolar line-driver levels. The 18-pin PDIP package is a through-hole option for prototypes, legacy systems, and designs that prioritize easy inspection and hand soldering. Typical uses include serial adapters, industrial equipment links, test and measurement instruments, and legacy computer peripherals that need two RS-232 channels from one interface IC. The 200 kB/s rate is higher than many slower RS-232 transceivers, while the five-volt supply simplifies integration with digital logic. Designers should verify the ADM242AN package pinout and line-driver loading before layout. Keep charge-pump capacitor connections short, observe the required bypass and decoupling arrangement, and use protection appropriate to the cable environment because ESD and surge voltages on an external RS-232 port can exceed logic-level expectations. This product page synthesizes verified manufacturer and distributor information, comparison-oriented interface details, and practical implementation guidance for engineers evaluating the ADM242AN as a dual-driver, dual-receiver RS-232 solution.

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ADM242ANZ

ADM242ANZ - 200 kbps 2/2 RS-232 IC | Analog Devices

Analog Devices ADM242ANZ is a high-speed RS-232 line-driver and receiver IC featuring two drivers, two receivers, and a maximum signaling rate of 200 kB/s. It operates from a single 5 V supply in an 18-pin PDIP package and uses an on-chip charge pump with 0.1 µF external capacitors to generate the bipolar voltage levels required by RS-232 links. An RS-232 transceiver is an interface IC that combines digital line drivers and receivers for serial communication over unbalanced point-to-point connections. The driver converts TTL or CMOS logic signals into RS-232 bipolar levels, while the receiver converts bipolar line signals back into logic-level voltages. The ADM242ANZ belongs to the broader interface IC hierarchy, where it bridges modern digital logic and legacy serial equipment. The ADM242ANZ includes two drivers and two receivers, allowing two communication channels to be implemented with one device. Its 200 kB/s signaling rate supports higher-throughput serial links than slower RS-232 transceivers while retaining the broad compatibility of the RS-232 standard. The single 5 V supply simplifies system power design, and the charge-pump architecture avoids a separate negative supply for bipolar driver output. Two 0.1 µF charge-pump capacitors are required to operate the integrated voltage converter. According to the Analog Devices ADM242 family datasheet, the device meets EIA-232-E and V.28 specifications. This makes the interface appropriate for equipment requiring standardized RS-232 electrical behavior, including instrumentation, industrial control, data acquisition, and legacy peripheral connections. Typical uses include two-channel RS-232 links in test equipment, factory automation controllers, barcode and labeling systems, point-of-sale equipment, and embedded serial-port systems. The two-channel arrangement is particularly useful when a system needs both transmit and receive paths on each of two RS-232 ports while keeping the external component count low. When laying out a design, place the charge-pump capacitors close to their designated pins and provide a clean 5 V supply with local high-frequency bypass. RS-232 is an unbalanced interface, so cable routing and grounding can affect noise immunity. Confirm that the selected connector, cable, and remote equipment use compatible RS-232 signal levels before deployment. This page combines the verified ADM242ANZ specifications, package information, sourcing guidance, and practical interface-design considerations. It also distinguishes the available pin-compatible family option from broader functional equivalents, helping engineers assess replacement decisions without changing the PCB footprint.

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ADM242AR

ADM242AR - 200 kbps 2/2 RS-232 Transceiver | Analog Devices

The Analog Devices ADM242AR is a 200 kbps, 5 V CMOS RS-232 interface IC with two drivers and two receivers in an 18-pin SOIC package. It accepts a 4.5 V to 5.5 V supply and uses an efficient on-chip charge pump with 0.1 µF external capacitors to produce the bipolar voltage levels required by RS-232. The 2/2 transceiver arrangement supports two transmit channels and two receive channels in one device. An RS-232 transceiver is an interface IC that converts low-voltage CMOS logic signals into voltage levels suitable for RS-232 links, while receivers convert the bipolar line levels back into CMOS-compatible signals. It belongs to the RS-232 transceiver hierarchy, alongside line drivers and line receivers, and is used in the broader category of interface ICs for point-to-point serial communication equipment. Key verified features include a maximum data rate of 200 kbps, operation from a single 5 V supply, two integrated drivers, two integrated receivers, and external charge-pump capacitors rated at 0.1 µF. The SOIC-18 package supports surface-mount assembly. The verified operating-temperature range is -40°C to +85°C, making the device suitable for industrial-temperature equipment when other system requirements are satisfied. The on-chip charge pump avoids a discrete negative-voltage supply and supports a compact interface implementation. In an RS-232 application, the CMOS-side pins connect to a UART or another serial controller, while driver outputs connect through the cable or board-level interface and receiver inputs accept the remote signal. The supply and charge-pump capacitor network must be placed according to the manufacturer datasheet because their stability and layout affect communication reliability. Typical uses include industrial serial adapters, instrumentation, data-acquisition equipment, embedded serial links, and control systems requiring more than one RS-232 direction. The ADM242AR is appropriate when two transmit and two receive channels are needed in one 5 V interface. Because its data rate is specified up to 200 kbps, cable length, termination, grounding, and connector requirements should be evaluated together with the UART baud rate. For new layouts, reserve all 18 package pins, connect the charge-pump capacitors as specified by Analog Devices, and provide a local bypass capacitor near the supply pins. The verified SOIC-18 footprint should be checked against the selected board and the exact ADM242AR pinout. Designers should confirm RS-232 electrical requirements, shutdown or enable behavior, and system-level ground strategy before release. This page combines the verified Analog Devices product description, distributor package and price references, and cross-reference results to help engineers evaluate the ADM242AR. It emphasizes verified facts and flags details that were not available in the supplied data rather than estimating missing electrical values.

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ADM2482EBRWZ

ADM2482EBRWZ - 2.5kV Isolated RS-485/RS-422 Transceiver | ADI

The Analog Devices ADM2482EBRWZ is a 2.5 kV rms isolated RS-485/RS-422 transceiver with integrated transformer driver, ±15 kV ESD protection, and 16 Mbps data rate, packaged in a 16-lead wide-body SOIC (SOIC-W). It combines a three-channel digital isolator, an RS-485/RS-422 differential line driver, and a differential line receiver on a single die, eliminating the need for an external DC/DC isolation supply by deriving bus-side power from an external center-tapped transformer. What is an isolated transceiver? An isolated transceiver is a type of interface IC that combines a galvanic isolation barrier with a standard serial communication protocol transceiver. It belongs to the broader family of digital isolators -> interface ICs -> wired communication transceivers -> semiconductors. The galvanic isolation (typically 2.5 kV rms or higher) protects low-voltage logic and host circuitry from large ground-potential differences, surge events, and fault voltages on long industrial bus segments. Isolated transceivers are essential when RS-485 cabling leaves the local equipment chassis and traverses factory floors, process plants, or outdoor installations. Key features of the ADM2482EBRWZ include a 25 kV/µs common-mode transient immunity (CMTI), 16 Mbps maximum data rate (suitable for PROFIBUS and high-speed half/full-duplex RS-485), configurable half-duplex or full-duplex operation, and a 3.3 V/5 V logic-side supply with a 3.3 V isolated bus-side supply generated internally from pins D1/D2 driving an external transformer. The wide-body SOIC package provides the required 8 mm creepage clearance for 2.5 kV rms reinforced isolation per IEC 61850 / IEC 61010-1 system standards. Hot-swap glitch rejection on the DE and RE pins prevents data corruption during board insertion into a live backplane. The transceiver uses an iCoupler-style transformer-driven isolation architecture: logic-side data crosses the isolation barrier through ADI's chip-scale micro-transformers, and bus-side power is rectified from a secondary winding. This architecture eliminates optocoupler LED aging concerns and provides stable timing across the industrial temperature range. The device operates over -40 °C to +85 °C ambient and meets ±15 kV ESD per IEC 61000-4-2 air-gap discharge on the bus pins. Typical applications include isolated RS-485 nodes in industrial fieldbus networks (PROFIBUS DP, Modbus RTU), smart-grid metering and substation communications, building automation (BACnet, KNX), solar inverter CAN/RS-485 links, and any system requiring robust high-voltage isolation between a controller and a remote bus segment. Half-duplex mode uses pins Y/Z/A/B; full-duplex mode uses dedicated TX and RX differential pairs. When designing with the ADM2482EBRWZ, pay attention to the center-tapped transformer selection: a 1:1.33 to 1:1.5 turns ratio with adequate isolation rating is recommended. Place the Schottky diodes and smoothing capacitor close to pins D1/D2 for clean bus-side power, and use 120 Ω termination at both ends of the RS-485 bus. The wide-body SOIC footprint requires an 8 mm minimum clearance under the package for 2.5 kV rms reinforced isolation. This page synthesizes distributor pricing, drop-in alternatives from the ADM2482E/ADM2487E family, and practical design notes not found in the manufacturer datasheet alone.

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ADM2485BRWZ

ADM2485BRWZ - Isolated RS-485 Transceiver | Analog Devices

The ADM2485BRWZ is a high-speed, galvanically isolated RS-485/RS-422 transceiver with an integrated transformer driver, manufactured by Analog Devices. It is designed for bidirectional data communication on multipoint bus transmission lines and complies with ANSI/TIA/EIA RS-485-A-98 and ISO 8482:1987 (E). The device integrates a 3-channel digital isolator, a three-state differential line driver, and a differential input receiver, all in a 16-pin SOIC-W (wide body) package. It operates from a single 5V supply on the logic side and a 5V supply on the bus side, providing 2.5 kVrms isolation. The ADM2485BRWZ supports data rates up to 16 Mbps and features a high common-mode transient immunity (CMTI) of 25 kV/µs, making it suitable for industrial and harsh environments. A digital isolator is a component that provides galvanic isolation between two circuits while allowing digital signals to pass. It uses capacitive or magnetic coupling to transfer data across an isolation barrier, preventing ground loops and protecting sensitive electronics from high voltages. The ADM2485BRWZ uses Analog Devices' iCoupler technology, which combines high-speed CMOS and monolithic transformer technology to achieve reliable isolation. This places it in the category of interface ICs, specifically isolated RS-485 transceivers, which are essential in industrial automation, motor control, and building automation systems where noise immunity and safety are critical. Key features of the ADM2485BRWZ include a 16 Mbps data rate, 2.5 kVrms isolation voltage, 25 kV/µs CMTI, and an integrated transformer driver that simplifies the design of the isolated DC-DC converter. The device also has thermal shutdown protection and a wide operating temperature range of -40°C to +85°C. The receiver has a 1/8 unit load, allowing up to 256 nodes on the bus. The driver maintains a high output current of ±60 mA, ensuring robust signal integrity over long cable runs. The ADM2485BRWZ is designed for use in industrial networks, such as PROFIBUS, Modbus, and BACnet, where reliable data transmission over long distances is required. Its integrated transformer driver reduces external component count, saving board space and simplifying the power supply design. The device is available in a 16-pin SOIC-W package, which is suitable for surface-mount assembly and is RoHS compliant. When designing with the ADM2485BRWZ, it is important to ensure proper PCB layout to maintain isolation integrity. The isolation barrier should be kept clear of copper traces, and the transformer driver should be connected to a suitable external transformer and rectifier circuit to generate the isolated bus-side supply. Additionally, termination resistors should be placed at both ends of the bus to minimize reflections and ensure signal integrity.

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ADM2485BRWZ-RL7

ADM2485BRWZ-RL7 - Isolated RS-485 Transceiver | Analog Devices

The ADM2485BRWZ-RL7 is a high-speed, galvanically isolated RS-485/RS-422 transceiver with an integrated transformer driver, manufactured by Analog Devices. It combines a 3-channel digital isolator, a three-state differential line driver, and a differential input receiver into a single 16-pin SOIC-W package. The device supports data rates up to 16 Mbps and provides 2500 Vrms isolation, making it suitable for industrial networks, motor control, and building automation. A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass. In the context of RS-485 communication, isolation protects against ground loops, common-mode voltage differences, and transient surges, ensuring reliable data transmission in harsh industrial environments. The ADM2485 uses Analog Devices' iCoupler technology, which uses chip-scale transformers instead of optocouplers, offering higher speed, lower power, and better reliability. Key features include a 3-channel isolator (one driver, one receiver, one data direction control), an integrated transformer driver that provides isolated power with an external transformer, and compliance with ANSI/TIA/EIA RS-485-A-98 and ISO 8482:1987(E). The device operates from a single 5V supply on the logic side and a 5V supply on the bus side, with a common-mode voltage range of -7V to +12V. It features thermal shutdown protection and a wide operating temperature range of -40°C to +85°C. The ADM2485 employs iCoupler technology, which uses chip-scale transformers to transmit data across an isolation barrier, providing superior performance compared to optocouplers. The integrated transformer driver generates a square wave that drives an external transformer to create an isolated power supply, eliminating the need for a separate DC-DC converter. This architecture reduces component count and board space while maintaining high isolation and data integrity. Typical applications include industrial fieldbus networks, PROFIBUS, Modbus, motor control, and building automation systems. The device is ideal for applications requiring robust communication over long distances in electrically noisy environments. Its high CMTI (25 kV/µs) ensures reliable operation in the presence of fast transients. When designing with the ADM2485, ensure proper PCB layout to maintain isolation creepage and clearance distances. Place the external transformer close to the device and use appropriate decoupling capacitors on both supply rails. The integrated transformer driver requires an external transformer with a 1:1 turns ratio and a center-tapped primary, as specified in the datasheet.

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ADM2486BRWZ-RL7

ADM2486BRWZ-RL7 - Isolated RS-485 Transceiver | Analog Devices

The Analog Devices ADM2486BRWZ-RL7 is a high-speed, half-duplex, galvanically isolated RS-485/RS-422 transceiver that delivers 2500 Vrms isolation, a 20 Mbps data rate, and 25 kV/µs common-mode transient immunity (CMTI). It is supplied in a 16-lead SOIC-W (16-SOIC, 7.50 mm body width) package on tape-and-reel (RL7 suffix), making it suitable for high-volume surface-mount assembly in industrial communication equipment. A digital isolator combined with an RS-485 transceiver is an integrated interface component that provides galvanic isolation between a logic-side controller and a high-voltage bus side. In a system hierarchy, the ADM2486 sits in the physical-layer interface between a UART, MCU, DSP, or PROFIBUS ASIC and the differential RS-485 bus. Its isolation barrier prevents ground loops, common-mode voltages, and transient noise from corrupting the logic-side supply and data lines, which is essential in industrial networking, factory automation, and building control. Key features include Analog Devices iCoupler® magnetic isolation technology, PROFIBUS compliance, ANSI EIA/TIA 485-A and ISO 8482:1987 (E) compliance, 20 Mbps data rate, 3 V operation on VDD1, and 25 kV/µs CMTI. The transceiver integrates a three-channel isolator, a three-state differential line driver, and a differential input receiver in one 16-SOICW package. The RL7 tape-and-reel packaging supports automated pick-and-place assembly, while the 16-pin SOIC wide-body footprint is a common industry-standard form factor. Technical depth is provided by the iCoupler architecture, which uses chip-scale transformers instead of optocouplers, offering better timing accuracy, longer life, and stable CMTI over temperature. The 25 kV/µs CMTI ensures that fast-rising common-mode transients generated by motor drives, inverters, and contactors do not produce bit errors on the bus. This makes the device well suited to electrically noisy industrial environments where isolation integrity is critical. Typical applications include PROFIBUS DP fieldbus networks, PLC remote I/O, motor-drive communication, building automation, smart-grid metering, and SCADA remote terminal units. With its 20 Mbps data rate, the ADM2486 supports both high-speed fieldbus traffic and slower legacy RS-485 systems, providing design flexibility across multiple product lines. When designing with this device, place the isolated bus-side components close to the field connector and maintain a clean isolation barrier on the PCB. Add 120 Ω termination resistors at both ends of the RS-485 bus and bias resistors if the receiver does not have integrated fail-safe biasing. The RL7 suffix denotes a 7-inch tape-and-reel package variant, so confirm reel quantity with the distributor for production planning.

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ADM2561EBRNZ

ADM2561EBRNZ - 3kV Isolated RS-485 Transceiver, 25Mbps | ADI

The Analog Devices ADM2561EBRNZ is a 3 kV RMS signal and power isolated RS-485 transceiver with integrated isoPower isolated DC-DC converter, housed in a 28-pin SOIC-W-FP wide-body package with exposed pad. It supports full- and half-duplex communication at data rates up to 25 Mbps while providing ±15 kV IEC ESD protection on the bus pins. An isolated RS-485 transceiver combines a standard RS-485 line driver/receiver (TIA/EIA-485-A and ISO 8482:1987 compliant) with galvanic isolation between the logic-side UART and the bus-side cable. The isolation barrier, typically 3 kV RMS for 60 seconds, breaks ground loops, protects low-voltage processors from hazardous bus voltages, and rejects common-mode transients on long industrial cable runs. When the transceiver also integrates an isolated DC-DC converter (isoPower), the device only needs a single 3.3 V or 5 V supply on the logic side - the high-voltage bus-side rails are generated internally. Key features include 3 kV RMS basic isolation per UL 1577, integrated isolated DC-DC converter, ±15 kV IEC 61000-4-2 ESD on the bus pins, 25 Mbps maximum data rate, 1/8 unit load (256 nodes on the bus), and hot-swap tolerant driver outputs. The SOIC-W-FP (wide-body SOIC with exposed pad) package provides 8 mm creepage/clearance on the PCB and excellent thermal dissipation for the internal DC-DC converter. Typical applications include isolated RS-485/RS-422 industrial fieldbus nodes (Modbus, PROFIBUS, BACnet), solar inverter string monitoring, building automation gateways, motor drive control interfaces, and any system that needs to bridge a high-voltage or noisy bus to a low-voltage microcontroller over a safety-rated isolation barrier. When designing with the ADM2561EBRNZ, follow the datasheet PCB layout guidelines for the exposed pad and the clearance/creepage rules of the 8 mm wide-body SOIC. Decoupling capacitors must be placed close to the VDD1/VISOIN/VISOOUT pins; failure to do so can degrade the internal DC-DC converter's noise performance.

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ADM2561EBRNZ-RL7

ADM2561EBRNZ-RL7 - 3kV Isolated RS-485/RS-422 Transceiver | ADI

The Analog Devices ADM2561EBRNZ-RL7 is a 3 kV RMS signal- and power-isolated RS-485/RS-422 transceiver integrated in a 28-pin SOIC-W-FP (wide-body SOIC with fine pitch and exposed pad) package. It integrates an isolated DC-to-DC converter and an isolated RS-485 transceiver in a single IC, supports full- and half-duplex operation, and is rated for ±15 kV IEC ESD on the bus pins. An isolated RS-485 transceiver is a physical-layer interface IC that combines galvanic isolation with a differential line driver/receiver. Isolation breaks ground loops between the local controller (MCU, FPGA, processor) and the remote bus nodes, allowing long cables, large common-mode voltages, and improved noise immunity in industrial systems. The ADM2561E family complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E), placing it within the RS-485 transceiver product hierarchy: RS-485 transceiver -> line transceiver -> interface IC -> integrated circuit. Key features include 3 kV RMS isolation per UL 1577, integrated isolated DC-DC converter (no external transformer required), up to 25 Mbps data rate, and a 1-channel full-/half-duplex topology. The transceiver operates from a single 3 V or 5 V supply on the logic side, with the bus side powered through the integrated isoPower converter. Receiver failsafe features guarantee a known output state on idle or shorted bus, and the device supports up to 256 nodes on a single bus. Wide-body SOIC-W-FP provides 8 mm of creepage/clearance for reinforced isolation. The architecture uses ADI's iCoupler technology: chip-scale transformers for both signal isolation (coreless digital isolation) and power isolation (isoPower integrated DC-DC). This eliminates the need for a discrete isolation barrier plus separate isolated supply, saving ~50% PCB area versus discrete solutions. Latency is typically <100 ns per channel, making the device adequate for high-speed industrial protocols such as Profibus, Modbus RTU, and high-speed motion-control networks. Typical applications include industrial fieldbus nodes (Modbus, Profibus, BACnet), solar inverter string monitoring, building automation gateways, motor-control encoder links, and any long-cable RS-485 link where ground potential differences exceed ±10 V. The integrated isoPower allows single-supply designs, simplifying bill-of-materials for isolated nodes. Designers should budget for the SOIC-W-FP land pattern and observe creepage/clearance constraints for reinforced isolation. The exposed pad must be soldered to a sufficiently large copper island connected only to the logic-side ground or left floating per safety certification. This page synthesizes distributor pricing, drop-in alternatives, and engineering guidance not found in the standalone datasheet, helping procurement and design engineers evaluate the ADM2561EBRNZ-RL7 faster.

USD $9.07 במלאי

ADM2563EBRNZ

ADM2563EBRNZ - 3 kV Isolated RS-485 Transceiver, 28-SOIC-W-FP | Analog Devices

The Analog Devices ADM2563EBRNZ is a 3 kV RMS signal and power isolated RS-485 transceiver integrated in a 28-pin SOIC-W-FP wide-body package with an integrated isoPower DC-to-DC converter. It supports full-duplex RS-422/RS-485 communication, ±15 kV IEC ESD protection on the bus pins, and complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987 (E). The device operates over a 3.0 V to 5.5 V VCC supply range with a 1.7 V to 5.5 V logic-side VIO rail. An isolated RS-485 transceiver is a transceiver whose logic-side UART interface and bus-side differential line driver/receiver are galvanically separated by an internal transformer-based isolation barrier, while a built-in isolated DC-DC converter delivers power across that same barrier. The ADM2563E family belongs to the RS-485 transceiver -> serial interface IC -> interface IC category within power management and signal-chain semiconductors, replacing discrete opto-couplers, transformers, and external isolated supplies with a single chip. Key features of the ADM2563EBRNZ include an integrated isolated DC-DC converter (no external transformer required), ±15 kV IEC 61000-4-2 ESD on RS-485 A/B/Y/Z pins, ±25 kV HBM ESD on bus pins, 25 Mbps maximum data rate, thermal shutdown, and current-limit protection on the isolated supply output. The 28-SOIC-W-FP package (wide-body SOIC with an exposed pad for thermal dissipation) is rated to 3 kV RMS (per IEC 61010-1 / UL 1577) for reinforced isolation. The exposed pad must be soldered to the PCB ground plane to achieve the rated creepage/clearance and to limit junction temperature rise at full duplex load. Typical applications include isolated RS-485 industrial fieldbus nodes, solar inverter monitoring, building automation (BACnet, Modbus RTU), motor drive encoder feedback, and any point-to-point or multi-drop RS-485 link requiring 3 kV reinforced isolation. The ADM2563EBRNZ is particularly attractive when PCB area is constrained because it eliminates the transformer, optocouplers, and isolated LDO that a discrete isolation solution would otherwise require. When designing with this part, observe the exposed-pad soldering guideline, decouple VCC/VIO/VISOOUT with 1 µF X7R ceramics placed within 2 mm of each pin, and confirm that the bus-side shield/ground reference matches the application. The integrated isolated DC-DC converter removes the need for a push-pull transformer but does introduce about 25 mA quiescent current draw from VCC. This page synthesizes distributor pricing, drop-in alternatives from the ADM2561E/ADM2563E/ADM2565E/ADM2567E families, and practical design notes not found in the manufacturer datasheet.

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