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ADM211ARZ - 5V 4/5 RS-232 Transceiver | Analog Devices
ADM211ARZ

ADM211ARZ - 5V 4/5 RS-232 Transceiver | Analog Devices

The Analog Devices ADM211ARZ is a 5 V RS-232 line-driver and receiver interface IC with 4 drivers, 5 receivers, a 200 kbps data rate, and a 28-pin SOIC package. It uses a 0.1 µF charge-pump capacitor to support EIA-232-E and V.28 communications interfaces when conventional ±12 V supplies are unavailable. An RS-232 transceiver is an interface IC that combines differential line drivers and receivers for serial data transmission over single-ended, bipolar signaling connections. The driver converts CMOS logic levels into RS-232 voltage levels, while the receiver converts incoming RS-232 signals back into CMOS-compatible logic. Within the interface hierarchy, the ADM211ARZ belongs to the RS-232 transceiver class, interface IC category, and broader integrated-circuit family. The ADM211ARZ provides four transmit channels and five receive channels in one package. Its 200 kbps maximum signaling rate supports moderately high-speed equipment links, while the integrated on-board DC-to-DC converters generate the bipolar voltage levels required by RS-232 from a single 5 V supply. The 0.1 µF charge-pump capacitor requirement reduces the number of external support components compared with discrete level-shifting designs. The ADM211 family is specified for a 4.5 V to 5.5 V supply range, with an on-board converter capable of producing approximately ±9 V output swing from the 5 V supply. This architecture allows operation without external ±12 V rails. The device is identified as a low-power RS-232 solution and is suited to portable, industrial-control, instrumentation, and embedded equipment interfaces where supply constraints and channel count are important. Typical uses include multi-channel serial-port connections, industrial data-acquisition equipment, test and measurement systems, and embedded control systems. A four-driver configuration can support four outbound channels, while the fifth receiver can monitor an additional incoming signal. This asymmetry is useful in systems where one node transmits on several lines but receives status, acknowledgment, or data from one additional line. PCB design should preserve short return paths for the RS-232 cable-side pins and provide an uninterrupted ground reference. Place the 0.1 µF charge-pump capacitor close to the device and follow the datasheet connection diagram. RS-232 interfaces also require careful segregation between cable-side and logic-side nets to avoid electrostatic-discharge events propagating into surrounding circuitry. This product page combines the manufacturer device information with package, application, pricing workflow, replacement, and design guidance. It also distinguishes a true same-footprint replacement from alternatives that require a different package or a different channel configuration, helping engineers make a board-level selection without relying on a generic substitute list.

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ADM213AR - 4/5 5V RS-232 Transceiver, 200kbps | Analog Devices
ADM213AR

ADM213AR - 4/5 5V RS-232 Transceiver, 200kbps | Analog Devices

The Analog Devices ADM213AR is a production +5 V CMOS RS-232 transceiver with four drivers, five receivers, shutdown and enable pins, and two receivers remaining active during shutdown. It supports data rates to 200 kbps, operates from a 4.5 V to 5.5 V supply, and uses a 28-pin SOIC package. Its integrated DC-to-DC converters produce approximately ±9 V output swing from a single 5 V supply. An RS-232 transceiver is an interface IC that converts logic-level TTL or CMOS signals into RS-232-compatible differential voltage levels, while converting received RS-232 levels back into logic-level signals. The ADM213AR belongs to the line-driver/receiver and interface-IC hierarchy used for EIA-232-E and V.28 communications where ±12 V is unavailable. Integrating charge-pump converters eliminates the need for a separate negative supply in many point-to-point interfaces. Key features include four RS-232 drivers, five receivers, two receivers active in shutdown, 0.1 µF charge-pump capacitors, 120 kbps data-rate support in the cited feature data, and approximately ±9 V output swing with a 5 V supply. The reported low-power figure is 15 mW. The 28-SOIC package is suitable for conventional through-hole PCB assembly, and the device is identified as a plug-in upgrade for MAX205, MAX211, and MAX213 families. The device uses a single positive supply, making it useful for systems that cannot easily provide negative RS-232 rails. Its receiver inputs are specified for ±30 V input levels, while latch-up protection is listed as a feature. The shutdown function can reduce system power when the interface is inactive, although two receivers remain operational for selected monitoring or wake-up signals. Typical applications include industrial RS-232 links, instrumentation, point-of-sale equipment, data acquisition systems, embedded serial ports, and legacy computer peripherals. When using the device, verify the exact pinout, shutdown polarity, receiver enable behavior, charge-pump capacitor values, and RS-232 signal polarity against the manufacturer datasheet before final PCB release. This page combines the supplied manufacturer and distributor information, sourcing links, interface context, and engineering cautions. Pricing and cross-reference claims are limited to the retrieved data; unverified values are marked as data needed rather than guessed.

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ADM213ARZ - 4/5 RS-232 Transceiver, 200 kbps | Analog Devices
ADM213ARZ

ADM213ARZ - 4/5 RS-232 Transceiver, 200 kbps | Analog Devices

The Analog Devices ADM213ARZ is a four-driver, five-receiver RS-232 transceiver rated for data rates up to 200 kbps and operation from a 5 V supply. The device is packaged in a 28-pin SOIC and accepts 0.1 µF charge-pump capacitors. It includes on-board dc-to-dc converters that produce approximately ±9 V output swings from the single 5 V supply. An RS-232 transceiver is an interface IC that combines differential line drivers and receivers into a circuit capable of communicating with equipment using the EIA-232-E and V.28 physical-layer standards. The ADM213ARZ belongs to the broader hierarchy of interface ICs, communication transceivers, and semiconductors. It is intended for systems that cannot provide external ±12 V rails but still require compliant RS-232 signal levels. The ADM213ARZ provides four transmit drivers and five receive channels, allowing one board to support multiple serial links. Its shutdown and enable controls support power management in equipment where inactive interface circuitry must not consume unnecessary power. Two receivers remain active during shutdown, enabling selected data paths to remain monitored. The 200 kbps capability is suitable for legacy serial equipment, industrial control links, service interfaces, and instrumentation. The integrated charge-pump circuitry simplifies implementation compared with an RS-232 solution requiring external negative-voltage generation. The 4.5 V to 5.5 V operating range supports conventional 5 V system rails, while the approximately ±9 V charge-pump outputs provide the voltage swing needed to overcome RS-232 receiver thresholds. Use the manufacturer datasheet for the recommended capacitor values, driver and receiver electrical limits, enable polarity, and complete timing characteristics. Typical applications include multi-port industrial control panels, configuration and programming ports, laboratory equipment, point-of-sale systems, and embedded systems communicating with legacy RS-232 peripherals. Multiple drivers permit several output ports, while five receivers provide additional channels for status, handshake, and incoming data signals. The shutdown function is particularly useful in portable or space-constrained systems where unused channels must be disabled. PCB implementation should follow the manufacturer datasheet layout for the charge-pump capacitors and high-voltage RS-232 pins. Keep sensitive receiver traces away from driver outputs and switching-capacitor nodes, use the specified ceramic capacitor types, and provide adequate ground return paths. Confirm pin functions, shutdown behavior, and enable polarity against the current datasheet before assigning control signals. This product page combines the ADM213ARZ specifications, package information, sourcing guidance, comparison points, and practical interface-design considerations. It also identifies verified same-footprint replacement candidates while clearly distinguishing them from parts that require different packages or revised circuitry.

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ADM213EAR - 4/5 RS-232 Transceiver | Analog Devices
ADM213EAR

ADM213EAR - 4/5 RS-232 Transceiver | Analog Devices

Analog Devices ADM213EAR is a single-supply RS-232 and V.28 interface transceiver with four drivers, five receivers, shutdown and enable pins, and two receivers active during shutdown. The device operates from a single 5 V supply and supports data rates up to 230 kbps according to the manufacturer product information. It is packaged in a 28-pin SOIC. An RS-232 transceiver is an interface IC that translates between TTL/CMOS logic levels and the bipolar voltage levels used by RS-232 communication links. The ADM2xxE family provides integrated drivers and receivers, allowing a complete multi-channel RS-232 port to be implemented with fewer external components. The ADM213EAR combines four transmit channels with five receive channels and includes control functions for systems that need to reduce power or preserve selected receive paths during shutdown. Key features include four RS-232 drivers, five RS-232 receivers, a maximum data rate of 230 kbps, single +5 V operation, and shutdown and enable control pins. The manufacturer describes the ADM2xxE devices as robust RS-232 and V.28 interface devices that fully conform to EIA-232E and CCITT V.28 specifications. The shutdown arrangement allows two receivers to remain active, which is useful in systems that need to monitor communication or wake from a low-power state. The ADM213EAR is suitable for industrial automation, instrumentation, data acquisition, telecommunications, and embedded control systems that use RS-232 ports. Its integrated multi-channel design reduces board area and simplifies firmware handling compared with separate line-driver and receiver packages. The enable and shutdown controls provide additional flexibility for power management and peripheral sharing. When designing around the ADM213EAR, check every unused driver and receiver input so that no floating input can create unnecessary current or data errors. Place the interface IC close to the connector and route each RS-232 line away from sensitive analog and clock signals. Decoupling capacitors should be placed at the supply pins according to the manufacturer datasheet, and the ground connection should follow the interface layout recommendations. This page combines the Analog Devices product description, distributor package information, technical application guidance, verified specifications, and replacement considerations for engineers evaluating the ADM213EAR.

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ADM222AN - 200 kbps Dual RS-232 Transceiver | Analog Devices
ADM222AN

ADM222AN - 200 kbps Dual RS-232 Transceiver | Analog Devices

The Analog Devices ADM222AN is a high-speed, 5 V CMOS RS-232 transceiver with 2 drivers, 2 receivers, a 200 kbps data rate, and an 18-pin PDIP package. Its key interface ratings are 200 kbps, 5 V supply operation, and 2/2 transmit-receive channels, while the charge-pump subsystem develops bipolar RS-232 levels with only 0.1 µF external capacitors. According to the Analog Devices product page, the on-board DC-DC converters provide a 9 V output swing with the 5 V supply, and the receivers accept input voltages to 30 V. An RS-232 transceiver is an interface IC that combines line drivers and line receivers so digital logic can communicate across a noisy, ground-offset-prone serial link. Its hierarchy is RS-232 transceiver → serial interface transceiver → line-driver/receiver IC → interface semiconductor. The ADM222 belongs to the high-speed CMOS RS-232 family alongside ADM232A and ADM242, combining logic-level interfacing with the voltage conversion required by RS-232. The ADM222 provides 2 drivers and 2 receivers, enabling two simplex links or one full-duplex RS-232 port. Its 200 kbps transmission rate is substantially faster than conventional low-speed RS-232 links. A 5 V-only power architecture simplifies system supply design, while the external 0.1 µF charge-pump capacitors support generation of bipolar signal levels. The stated 9 V output swing provides the required positive and negative line-drive voltage. The receiver input rating extends to 30 V, providing useful transient and voltage-range margin when connected to external RS-232 equipment. The device also includes a shutdown pin, allowing the transceiver to reduce activity when the interface is not required. Exact propagation-delay, input-threshold, output-current, supply-current, and temperature values are not present in the supplied search data and therefore require confirmation from the manufacturer datasheet. Typical uses include industrial serial-control links, test equipment, instrumentation, data-acquisition systems, and legacy peripheral connections. In each case, the two receiver/driver channels can support bidirectional communication when TX and RX signals are crossed appropriately. The 200 kbps rate can also shorten transfer time compared with slower RS-232 implementations, provided the connected equipment, cable, and protocol support that throughput. For implementation, place the 0.1 µF charge-pump capacitors close to their designated pins and route RS-232 traces away from sensitive analog and clock signals. Confirm every unused input and output state, especially when placing the part between systems with different logic voltage levels. Do not infer an unqualified alternative from functional similarity; a true drop-in replacement must match the 18-pin footprint and pin functions. This page combines verified Analog Devices product information, distributor identification, sourcing links, and design-oriented RS-232 considerations. It distinguishes documented values from unavailable specifications and does not treat general functional equivalents as guaranteed pin-to-pin replacements.

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ADM222ANZ - 200kbps RS-232 Transceiver | Analog Devices
ADM222ANZ

ADM222ANZ - 200kbps RS-232 Transceiver | Analog Devices

The Analog Devices ADM222ANZ is a 200 kbps RS-232 transceiver with two drivers, two receivers, a single 5 V supply, and a shutdown pin in an 18-lead plastic DIP package. Its 0.1 uF charge-pump capacitors generate the bipolar RS-232 voltage levels required by the EIA-232-E and V.28 interfaces without a separate negative supply. An RS-232 transceiver is an interface IC that combines digital logic-level transmitters and receivers with analog line-driver circuitry. The transmitter converts TTL or CMOS signals into RS-232 bipolar levels, while the receiver converts RS-232 levels back into logic-compatible signals. Within the interface hierarchy, the ADM222 belongs to the RS-232 transceiver family of interface ICs used to connect computer, industrial-control, and instrumentation equipment over short point-to-point links. The ADM222ANZ supports data rates up to 200 kbps from one 4.5 V to 5.5 V supply. Its two-driver, two-receiver configuration can support two data paths, such as one full-duplex channel and one additional unidirectional link, depending on the system wiring. The shutdown function disables the device to reduce supply current to 0.1 uA, making power management useful in portable or intermittently operated equipment. The integrated on-board DC-DC converter uses 0.1 uF external charge-pump capacitors to develop positive and negative RS-232 voltage levels. This architecture simplifies the power system because the device requires only one supply rail. Designers must still account for capacitor tolerance, ESR, wiring length, and the leakage and loading characteristics of the connected RS-232 network. Typical applications include legacy serial ports, industrial controllers, test equipment, data-acquisition systems, and service interfaces. The 18-lead plastic DIP package is useful for through-hole industrial and maintenance designs where socketed or leaded construction improves serviceability. The 7.62 mm lead pitch also permits compatibility with conventional perforated-board layouts. When laying out the circuit, place the charge-pump capacitors close to their specified pins and route RS-232 driver outputs away from sensitive receiver inputs. Confirm that the selected connector, cable, and remote equipment use compatible signal definitions and grounding practices. Where a modern design does not require legacy RS-232, an alternative interface such as USB or differential Ethernet may offer greater speed, cable distance, and noise immunity. This product page summarizes the ADM222ANZ operating characteristics, verified package information, application guidance, and replacement considerations. It also provides design-focused comparisons that help engineers assess supply voltage, signal count, data rate, shutdown behavior, and through-hole package requirements before committing a board layout.

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ADM222AR - 200 kbps Dual RS-232 Transceiver | Analog Devices
ADM222AR

ADM222AR - 200 kbps Dual RS-232 Transceiver | Analog Devices

The Analog Devices ADM222AR is a 5 V CMOS RS-232 transceiver with two drivers, two receivers, a 200 kbps transmission rate, and shutdown control in an 18-SOIC package. It generates bipolar RS-232 levels from a single 5 V supply using 0.1 µF charge-pump capacitors. Key verified features include 9 V output swing, 30 V receiver input capability, EIA-232-E and V.28 compliance, and an on-board DC-DC converter. An RS-232 transceiver is the interface category that connects a CMOS or TTL-based digital system to the bipolar signal domain used by serial equipment. The RS-232 driver converts logic-level signals into positive and negative voltage levels, while the receiver converts those bipolar levels back into logic-compatible signals. The ADM222 belongs to the broader interface IC hierarchy and combines line drivers, line receivers, and charge-pump circuitry in one package. The ADM222AR provides two transmit channels and two receive channels, allowing bidirectional RS-232 links between two systems. Its 200 kbps data rate supports faster serial communication than many conventional RS-232 transceivers. The 0.1 µF charge-pump capacitors reduce external capacitance requirements, while the shutdown pin can reduce supply current to 0.1 µA according to the manufacturer product information. Its 5 V supply architecture simplifies integration with digital logic. The on-board DC-DC converter develops the positive and negative voltage levels needed for RS-232 transmission, while the 9 V output swing and 30 V receiver input range provide useful line-level margin. The device is identified as a 2/2 full RS-232 transceiver and is available in the 18-SOIC surface-mount package denoted by the DigiKey listing. Typical uses include RS-232 test equipment, instrumentation, industrial serial links, data acquisition systems, and legacy peripheral connections. Designers should verify the exact package pinout and line-level timing requirements in the Analog Devices datasheet before layout. Charge-pump capacitor placement and supply decoupling remain important because they influence output voltage generation and signal integrity. This page consolidates verified Analog Devices product information, distributor package details, technical feature data, and practical RS-232 design guidance. It also distinguishes the ADM222AR from functional alternatives by emphasizing the verified 18-SOIC package, 200 kbps rate, 5 V operation, and shutdown function.

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ADM222ARZ - 2/2 RS-232 Transceiver 200kbps | Analog Devices
ADM222ARZ

ADM222ARZ - 2/2 RS-232 Transceiver 200kbps | Analog Devices

The ADM222ARZ is a high-speed, 5 V, 0.1 µF CMOS RS-232 transceiver from Analog Devices, featuring two drivers and two receivers in an 18-pin SOIC-W package. It operates from a single 5 V supply and uses an on-chip charge pump with small 0.1 µF external capacitors to generate RS-232 bipolar levels, achieving data rates up to 200 kbps. The device includes a shutdown (SHDN) pin that reduces supply current to 0.1 µA, making it ideal for power-sensitive portable applications. RS-232 transceivers are interface ICs that convert logic-level signals to RS-232 voltage levels for serial communication. They are part of the interface IC family, which also includes RS-485, CAN, and USB transceivers. The ADM222ARZ specifically provides the electrical signaling and protection required for legacy serial ports, enabling communication between microcontrollers and peripherals such as modems, GPS modules, and industrial equipment. Key features include a 200 kbps data rate, 0.1 µF charge pump capacitors, and a shutdown mode with 0.1 µA supply current. The device is fully compliant with EIA-232E standards and features a wide operating temperature range of -40°C to +85°C. The 18-pin SOIC-W package is suitable for space-constrained designs while providing adequate thermal performance. Technically, the ADM222ARZ uses a CMOS charge pump architecture to generate ±10 V RS-232 levels from a single 5 V supply. The internal charge pump requires only four external 0.1 µF capacitors, reducing board space and cost compared to older designs requiring larger capacitors. The receiver inputs tolerate up to ±30 V, providing robust protection against voltage spikes on the serial line. Typical applications include industrial automation, point-of-sale terminals, medical devices, and any system requiring reliable RS-232 communication. The shutdown feature is particularly useful in battery-powered devices where power conservation is critical. When designing with the ADM222ARZ, ensure that the charge pump capacitors are placed close to the V+ and V- pins to minimize noise and maintain proper voltage generation. The shutdown pin can be driven by a microcontroller GPIO to enter low-power mode when the serial port is idle.

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ADM223ARS - 120kB/s 5V RS-232 Interface | Analog Devices
ADM223ARS

ADM223ARS - 120kB/s 5V RS-232 Interface | Analog Devices

The Analog Devices ADM223ARS is a +5 V powered CMOS RS-232 driver and receiver interface IC featuring four transmitters, five receivers, a 120 kB/s data rate, and a 28-pin SSOP package. Its integrated on-board DC-DC converters produce approximately 9 V output swing from a single 5 V supply, while small 1 F capacitors support a compact implementation. An RS-232 interface is a transceiver category that converts logic-level signals into RS-232-compatible levels and converts received RS-232 signals back into CMOS logic. The ADM223ARS belongs to the interface IC hierarchy, which includes RS-232 transceivers, line drivers, line receivers, and multi-channel interface controllers. These devices connect conventional microcontroller, processor, and instrumentation logic to cable-based serial ports using differential bipolar voltage signaling. Key features include operation from a single +5 V supply, compliance with the stated EIA-232-E and V.28 specifications, a maximum data rate of 120 kB/s, approximately 9 V transmitter output swing, and support for small 1 F charge-pump capacitors. A low-power shutdown function reduces consumption when the interface is not needed, while the receiver channels remain active during shutdown. The receivers also provide a stated 30 V input capability. The integrated DC-DC conversion architecture removes the need for a separate external 5 V-to-approximately 9 V supply rail. This simplifies board design and reduces the number of power-supply connections around the transceiver. Because charge-pump capacitors and high-voltage driver outputs are involved, placement and return-current management remain important even though the device operates internally from only 5 V. Typical applications include RS-232 ports in industrial control equipment, data-acquisition systems, instrumentation, embedded control systems, and legacy serial-port interfaces. The combination of five receiver channels and four driver channels is useful when a system needs additional receive-only status or handshake signals beyond the four conductors required for bidirectional communication. A critical design consideration is that the S suffix denotes the 28-pin SSOP package used by this ordering code, so board layout and pin count must be checked before substitution. Cable protection, ground continuity, and isolation should also be evaluated because RS-232 is a physical-layer standard rather than a guarantee of surge immunity. This page consolidates verified manufacturer and distributor information, interface specifications, sourcing data, and replacement constraints into an engineer-oriented resource. It also separates verified drop-in replacements from broader functional equivalents to avoid implying PCB compatibility that the available cross-reference evidence does not establish.

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ADM230LJN - +5V CMOS RS-232 Driver/Receiver, 120 kbps, PDIP-20 | Analog Devices
ADM230LJN

ADM230LJN - +5V CMOS RS-232 Driver/Receiver, 120 kbps, PDIP-20 | Analog Devices

The Analog Devices ADM230LJN is a +5 V powered CMOS RS-232 line driver and receiver (transceiver) rated for data rates up to 120 kbps, packaged in a 20-pin plastic PDIP through-hole housing specified for 0 °C to +70 °C ambient operation. It is designed for EIA-232-E and V.28 serial interfaces where ±12 V supplies are not available. An RS-232 transceiver is an interface IC that combines a line driver and a line receiver, converting between TTL/CMOS logic levels and the differential bipolar signalling of the RS-232 standard. In the signal chain it belongs to the transceiver class, which sits between parallel logic ICs and a multi-driver, single-ended, physically long cable. A transceiver IC is a subtype of interface IC, which is itself part of the broader semiconductor and signal-conditioning hierarchy. Key features of the ADM230LJN include single +5 V operation, CMOS logic compatibility with 5 V microcontrollers, 120 kbps signalling rate, and a plastic PDIP-20 package that allows through-hole assembly and socketed prototyping. Because the part runs from a single +5 V rail, no separate negative voltage supply or external charge-pump components are required for standard RS-232 levels. The 0 °C to +70 °C rating places it firmly in commercial-temperature grade designs. The +5 V single-supply architecture is the key technical differentiator versus classic RS-232 transceivers that expect a dual ±12 V or ±5 V rail. This simplifies power tree design in industrial controllers, POS terminals, and instrumentation where only regulated +5 V is available, and it lowers overall board current compared with older bipolar driver-receiver combinations. Typical applications include PC serial port interfacing, industrial data acquisition and control panels, point-of-sale and retail peripherals, industrial instrumentation, and general-purpose RS-232 links between a host UART and an external modem or instrument. When designing with the ADM230LJN, keep the RS-232 cable run short, place the transceiver close to the connector, and route the differential receiver pair as a tightly coupled pair with a solid ground reference, because unbalanced RS-232 signalling is susceptible to ground-offset noise. This page consolidates verified distributor and manufacturer data, drop-in replacement options in the same PDIP-20 footprint, and practical interface-design notes that are not found in a single manufacturer datasheet.

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ADM230LJR - 5V RS-232 Transceiver | Analog Devices
ADM230LJR

ADM230LJR - 5V RS-232 Transceiver | Analog Devices

The Analog Devices ADM230LJR is a +5 V powered CMOS RS-232 driver and receiver designed for single-supply serial-interface designs where ±12 V is unavailable. It supports 120 kB/s data rates, includes an onboard DC-DC converter, and operates from a single 5 V supply. The device is housed in a 16-lead SOIC package. A CMOS RS-232 transceiver is an interface IC that converts logic-level digital signals into RS-232-compatible levels and converts incoming RS-232 signals back into logic levels. It belongs to the interface-IC hierarchy alongside drivers, receivers, and transceivers, providing the physical signaling layer between digital equipment and a serial port. The ADM230LJR is designed for EIA-232-E and V.28-compatible communication links, making it useful where a single supply rail is preferred over a dual-polarity RS-232 interface. The ADM230LJR includes one driver and one receiver in the same package. Its onboard DC-DC converter supports the RS-232 output swing from a 5 V supply, while the receiver remains active in shutdown mode. The datasheet information identifies a 9 V output swing, operation with 1 uF capacitors, a low-power shutdown function, and receiver input tolerance to 30 V. These features help simplify interface implementation in equipment that must protect logic-side circuitry from voltage transients. Because the ADM230LJR is powered from +5 V, its system-level implementation is simpler than traditional RS-232 designs using separate positive and negative supplies. The device is appropriate for instrumentation, industrial-control equipment, data-acquisition systems, embedded serial links, and service interfaces where the communication distance and signaling environment are consistent with RS-232 limits. The 120 kB/s rated data rate supports moderate-speed serial communication rather than high-bandwidth protocols. Layout should keep the serial traces short where possible, provide a stable return path, and place bypass capacitance close to the supply pins. The onboard converter and charge-pump circuitry require careful decoupling according to the manufacturer datasheet. A single 5 V rail, low-power shutdown, and active receiver operation are the principal features to evaluate when choosing this transceiver for compact or intermittently powered serial equipment.

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ADM231LAN - 2/2 5V RS-232 Transceiver | Analog Devices
ADM231LAN

ADM231LAN - 2/2 5V RS-232 Transceiver | Analog Devices

Analog Devices ADM231LAN is an obsolete low-power, +5 V CMOS RS-232 transceiver containing two line drivers and two line receivers in a 14-lead plastic dual in-line package. It supports EIA-232-E and V.28 communications interfaces where conventional ±12 V supplies are unavailable. According to the Analog Devices ADM231L family datasheet, the integrated charge-pump circuitry permits operation from a single +5 V supply while maintaining approximately ±5 V driver signal levels. The transceiver is intended for low-power serial-interface designs that require multiple RS-232 channels without external level-shifting components. An RS-232 transceiver is an interface IC that combines a transmitter and receiver with the voltage conversion required at a serial port boundary. The transmitter converts logic-level signals into RS-232-compatible levels, while the receiver converts incoming RS-232 levels back into CMOS-compatible signals. Within the broader semiconductor hierarchy, an RS-232 transceiver belongs to the interface IC family, alongside UARTs, level translators, isolated communication interfaces, and other data-communication components. The ADM231LAN combines two channels in each direction in one package. The principal feature is its two-driver, two-receiver arrangement. Its +5 V CMOS architecture avoids the need for a separate bipolar ±12 V power supply, reducing board complexity in systems where the host or controller already operates from +5 V. The manufacturer's Rev. C datasheet states that the family supports EIA-232-E and V.28 interfaces. It also identifies high slew rates and operation at data rates up to 100 kbps under worst-case loading conditions, making the device suitable for moderate-speed point-to-point serial links. The internal architecture uses charge-pump voltage generation to produce the bipolar signal levels required by RS-232 from one low-voltage supply. Each driver must still handle the voltage and current behavior of an RS-232 connection, including the possibility of a shorted or misconnected cable. The receiver provides the thresholding required to interpret bipolar RS-232 levels as valid logic states. Although the device eliminates external negative-supply generation, its communication performance still depends on correct supply bypassing, controlled-impedance interconnects, and appropriately terminated connector-side networks. Typical uses include industrial control links, point-of-sale equipment, data-acquisition systems, embedded serial ports, and legacy computer interfaces that cannot accept modern ±12 V RS-232 levels directly. It can also serve as a bridge between a +5 V CMOS controller and an RS-232 host, provided that the system observes the family's specified data-rate, supply, temperature, and package constraints. The ADM231LAN's lifecycle status is obsolete, so new production designs should verify current replacement availability before committing a PCB layout to it. The primary design consideration is package migration. The 14-lead plastic dual in-line package is relatively large and not as assembly-efficient as modern leadless or surface-mount interface packages. The 100 kbps capability is suitable for many control and instrumentation links but is not appropriate for higher-bandwidth protocols. Because the part is obsolete, engineers should evaluate listed drop-in candidates by pinout, driver and receiver count, supply voltage, data rate, and transceiver shutdown behavior rather than selecting a substitute solely by the RS-232 label. This product page combines verified manufacturer and distributor information with lifecycle context, application guidance, technical comparisons, and practical replacement-selection criteria. It distinguishes documented facts from unavailable parameters, highlights the ADM231LAN's +5 V two-driver/two-receiver architecture, and identifies the package and supply constraints that most affect drop-in replacement decisions.

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ADM231LAQ - 5V CMOS RS-232 Transceiver | Analog Devices
ADM231LAQ

ADM231LAQ - 5V CMOS RS-232 Transceiver | Analog Devices

The Analog Devices ADM231LAQ is a +5 V powered CMOS RS-232 driver and receiver capable of 120 kB/s data transfer, with on-board DC-DC converters, a 9 V output swing, and low-power shutdown in a 16-pin package. The device meets EIA-232-E and V.28 specifications according to the manufacturer datasheet listing, while its on-board converters permit operation from a single 5 V supply. A CMOS RS-232 interface transceiver is a signal-line interface integrated circuit that combines a line driver and receiver with the voltage conversion required by RS-232. Within the broader hierarchy of interface ICs, it translates low-voltage CMOS logic into RS-232-level signals and converts received RS-232 levels back into CMOS-compatible signals. Its applications include data acquisition, industrial control, test equipment, and equipment-to-equipment communication links. The ADM231LAQ supports a data rate of 120 kB/s and provides a 9 V output swing from a 5 V supply. Its on-board DC-DC converters eliminate the need for a separate boosted supply for the RS-232 driver. Small 1 µF charge-pump capacitors are specified for the converter implementation, reducing board area compared with traditional discrete charge-pump approaches. A low-power shutdown feature helps reduce supply consumption when the interface is not active. Unlike the standard shutdown arrangement in some competing transceivers, the ADM231LAQ keeps its receivers active during shutdown, allowing incoming RS-232 signals to remain detectable. Its receiver input can also tolerate signals as high as 30 V, which improves robustness when the connected cable or system exposes the interface to larger voltage excursions. The ADM231LAQ is suitable for point-to-point RS-232 links in industrial equipment, instrumentation, data loggers, and control systems. A single 5 V rail simplifies system power architecture, while the integrated converters maintain the positive and negative voltages required by RS-232. The 120 kB/s rate supports legacy serial communication, modem interfaces, and equipment control links where higher-speed differential standards are unnecessary. The principal design consideration is ensuring that external protection, connector selection, and grounding match the cable environment. The 30 V receiver input capability improves tolerance, but it does not replace surge protection or isolation in long industrial cable runs. Designers should also verify the exact package dimensions and pin assignment before PCB layout because the verified data identifies the device as a 16-pin part without publishing the package drawing in the supplied excerpts. This page consolidates the verified 120 kB/s operating rate, 5 V supply, 9 V output swing, 1 µF capacitor requirement, shutdown behavior, and distributor pricing information. It also separates confirmed data from unavailable package, pinout, lifecycle, and drop-in replacement details so engineers can identify what must be checked against the manufacturer datasheet before production release.

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ADM231LAR - 5V RS-232 Transceiver, 120kB/s | Analog Devices
ADM231LAR

ADM231LAR - 5V RS-232 Transceiver, 120kB/s | Analog Devices

The Analog Devices ADM231LAR is a 5 V powered CMOS RS-232 driver and receiver intended for EIA-232-E and V.28 communications interfaces. It operates from a single 5 V supply, supports data rates up to 120 kB/s, and is available in a 16-lead SOIC package. The verified product information identifies the part as obsolete, so new designs should confirm availability before committing to a layout. An RS-232 transceiver is an interface IC that converts logic-level signals into the bipolar voltage levels used by RS-232 links and converts returning bipolar signals back to CMOS logic. Within the interface hierarchy, this device belongs to the line-driver and receiver family, then to communication transceivers, and finally to the broader category of interface ICs. Its integrated DC-DC converter allows the driver to generate the positive and negative voltage swings required by RS-232 from one 5 V rail. Key features include a 120 kB/s maximum data rate, on-board DC-DC converters, a 9 V output swing with the 5 V supply, and support for small 1 uF charge-pump capacitors. A low-power shutdown function reduces consumption when the interface is not required. According to the verified feature summary, the receiver remains active during shutdown, allowing incoming signals to be monitored without powering the transmitter section fully. The receiver input is rated to 30 V, providing tolerance for ±15 V RS-232 signals and additional margin on unused or disconnected receive inputs. These characteristics make the ADM231LAR applicable to legacy serial ports, industrial control links, service equipment, instrumentation, and embedded systems that communicate with older RS-232 equipment. The principal design trade-off is that the ADM231LAR is a legacy 120 kB/s interface rather than a modern high-speed or multi-port RS-232 solution. Its single-supply architecture simplifies systems that lack ±12 V rails, but obsolete lifecycle status, charge-pump capacitor requirements, and the lower 120 kB/s ceiling limit new design adoption. When planning a replacement design, engineers should verify the complete pinout, shutdown behavior, charge-pump capacitor values, and package dimensions rather than selecting a substitute from the RS-232 family name alone. The verified sources did not establish five pin-compatible drop-in replacements in the same 16-lead SOIC footprint, so the alternatives listed here are limited to candidates for which comparative information was found. This page consolidates the verified manufacturer and distributor information, lifecycle status, pricing reference, interface characteristics, and replacement guidance for engineers evaluating an obsolete ADM231LAR inventory.

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ADM231LJR - 5V 120kbps RS-232 Transceiver | Analog Devices
ADM231LJR

ADM231LJR - 5V 120kbps RS-232 Transceiver | Analog Devices

The Analog Devices ADM231LJR is a 5 V powered CMOS RS-232 driver and receiver capable of 120 kB/s data transmission. The 16-lead gull-wing SOP package combines one supply rail, on-board DC-DC converters, low-power shutdown, and receiver operation during shutdown in a compact industrial interface circuit. An RS-232 transceiver is an interface IC that converts logic-level transmit and receive signals into differential-voltage, bipolar serial-line signals. Its functional hierarchy is RS-232 transceiver, line driver and receiver, communications interface IC, and broader semiconductor category. The ADM231LJR belongs to the ADM23xL family of single-supply RS-232 devices designed for industrial, instrumentation, and data-communication equipment. The ADM231LJR operates from a single 5 V supply and supports data rates up to 120 kB/s. Its on-board DC-DC converters produce the bipolar signal voltages required by RS-232 without a separate external charge-pump supply. The device provides 9 V output swing from a 5 V supply and uses only 1 F charge-pump capacitors, reducing board area compared with implementations requiring larger external capacitors. Power management features include low-power shutdown and receivers that remain active while the transmitter is shut down. This arrangement allows a system to monitor an RS-232 connection, detect activity, or wake a host without powering the full driver. The receiver input withstands voltages up to 30 V, improving tolerance to exposed industrial cabling and off-state bus conditions. Typical uses include industrial serial consoles, test and measurement equipment, point-of-sale terminals, programmable logic controllers, and embedded instruments that exchange serial data over longer cable runs than a logic-level UART. The 120 kB/s rate is suitable for configuration links, diagnostics, firmware update paths, and moderate-rate control data rather than continuous high-bandwidth streaming. The main design trade-off is power dissipation. A 5 V-only supply rail simplifies system power, but the DC-DC converters add internal switching activity compared with a dual-polarity implementation. Follow the recommended capacitor and charge-pump layout in the manufacturer datasheet, keep the RS-232 connector side of the circuit physically separated from sensitive analog and digital nodes, and provide a controlled signal ground reference.

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ADM232AAN - 200kbps Dual RS-232 Transceiver | Analog Devices
ADM232AAN

ADM232AAN - 200kbps Dual RS-232 Transceiver | Analog Devices

Analog Devices ADM232AAN is a 200 kbps dual RS-232 line-driver and line-receiver interface IC with two drivers, two receivers, a single 5 V supply, and a 16-lead plastic DIP package. It uses small 0.1 µF charge-pump capacitors and provides approximately ±9 V driver output swing from the 5 V supply while accepting receiver inputs up to ±30 V. The device meets the EIA-232-E and V.28 specifications identified in the manufacturer documentation. An RS-232 transceiver is an interface IC that converts between single-ended logic-level signals and the bipolar, differential voltage conventions used by RS-232 equipment. In the broader hierarchy, it belongs to the interface IC category, combines line-driver and line-receiver functions, and provides physical-layer connectivity between computer serial ports, industrial controllers, and communications equipment. The ADM232A family is positioned as a pin-compatible, high-speed upgrade for the AD232 and ADM232L families. Key features include a 200 kB/s transmission rate, two transmit channels, two receive channels, a single 5 V supply, on-board DC-DC converters, and compatibility with MAX222, MAX232A, and MAX242 pin arrangements. The small 0.1 µF charge-pump capacitors reduce board-space requirements compared with older RS-232 implementations using larger flying capacitors. Receiver inputs tolerate ±30 V, supporting practical protection against larger voltage excursions encountered on an external RS-232 port. Technically, the charge-pump circuitry generates the positive and negative voltage rails required by RS-232 drivers from the single 5 V source. The ADM232AAN combines this internal supply conversion with CMOS driver and receiver stages. Its 200 kB/s data rate supports legacy serial links substantially above the older 64 kB/s class of interface while retaining the established EIA-232-E and V.28 signaling behavior. Because the ADM232AAN is a 16-lead DIP device, it is intended for through-hole assembly, prototyping, legacy equipment, and industrial control boards where a surface-mount RS-232 footprint would be inconvenient. Typical applications include industrial serial controllers, test and measurement instruments, point-of-sale equipment, data acquisition systems, legacy computer peripherals, and isolated or non-isolated RS-232 communication ports. In a typical circuit, the IC interfaces a microcontroller UART to a DB9 or other RS-232 connector. Series resistance may be required on driver outputs when the connected cable is unusually long or exposes the port to electrostatic discharge; connector protection should be selected according to the actual cable and installation environment. Designers should place the charge-pump capacitors close to their specified pins and route the high-current charge-pump paths to minimize switching noise. The 5 V supply must provide adequate transient current, and PCB grounding should preserve a low-impedance return path between the transceiver and connector. Because the ADM232AAN has no integrated isolation barrier, applications requiring galvanic isolation require external isolation components and a suitably isolated power design. This page combines the verified manufacturer specifications, distributor package identification, cross-reference findings, application guidance, and drop-in replacement criteria. It also distinguishes verified facts from electrical values that were not present in the supplied source data, helping engineers compare replacements without assuming that equivalent function automatically guarantees equivalent layout or system behavior.

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ADM232AARN - 200kbps Dual RS-232 IC | Analog Devices
ADM232AARN

ADM232AARN - 200kbps Dual RS-232 IC | Analog Devices

The Analog Devices ADM232AARN is a dual RS-232 line-driver and receiver interface IC supporting data rates up to 200 kB/s from a single 5 V supply. The device provides two transmitters and two receivers and is packaged in a 16-lead narrow SOIC for compact RS-232 interface designs. An RS-232 transceiver is a semiconductor interface that converts low-voltage digital logic signals into bipolar RS-232 levels and converts received bipolar signals back into TTL or CMOS logic levels. Within the electronics hierarchy, the ADM232AARN is an RS-232 transceiver, interface IC, and power-management-assisted data-conversion component used to bridge modern digital equipment with legacy serial ports. The ADM232AARN integrates an on-chip DC-DC charge pump, allowing bipolar RS-232 levels to be generated from one 5 V supply without a separate negative power rail. The charge pump uses small 0.1 uF external capacitors. Its two-driver, two-receiver arrangement supports two RS-232 channels per package and reduces the number of interface components required in multi-port equipment. Data rates reach 200 kB/s, making the device suitable for equipment that needs faster serial transfer than low-speed RS-232 transceivers. The interface meets EIA-232-E and V.28 specifications. According to the Analog Devices datasheet, the outputs provide approximately 9 V swing with a 5 V supply, while the receivers accept input voltages to 30 V, providing useful margin for standard RS-232 signaling. Typical uses include industrial control consoles, point-of-sale equipment, instrumentation, data acquisition systems, and embedded products that retain a legacy RS-232 port. The integrated charge pump simplifies board layout, while the narrow 16-SOIC package supports space-constrained designs without requiring a separate negative supply regulator. When laying out the circuit, place the charge-pump capacitors close to their specified pins and route the driver outputs and receiver inputs away from sensitive analog and high-speed digital traces. Confirm ground-reference compatibility between the two connected RS-232 endpoints because the interface converts voltage levels but does not isolate the ground connection. This page combines device specifications, pin-compatible alternatives, interface application guidance, and practical layout considerations to support component selection, PCB implementation, and sourcing decisions for the ADM232AARN.

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ADM232LAN - 120 kbps Dual RS-232 Transceiver | Analog Devices
ADM232LAN

ADM232LAN - 120 kbps Dual RS-232 Transceiver | Analog Devices

Analog Devices ADM232LAN is a 2/2 RS-232 line-driver and receiver transceiver operating from a single 5 V supply, with a data rate of 120 kbps and a 16-pin through-hole DIP package. The device is intended for EIA-232-E and V.28 interfaces when conventional ±12 V supplies are unavailable. An RS-232 transceiver is an interface IC that converts between single-ended logic-level signals and differential bipolar signaling used by RS-232 equipment. The ADM232LAN integrates two transmitters and two receivers, an onboard DC-to-DC converter, and charge-pump circuitry capable of producing approximately 9 V output swing from a 5 V supply. This places it in the interface IC hierarchy alongside RS-232 line drivers, receivers, and full-duplex communication transceivers. Key features include operation from one 5 V supply, 120 kbps data transmission, 1 µF external charge-pump capacitors, low-power shutdown, receiver operation during shutdown, and receiver input protection to 30 V. The dual 2/2 configuration allows two serial channels to be supported by one package. Its through-hole DIP construction is useful for legacy industrial control, instrumentation, test equipment, and system prototypes where surface-mount packages would be inconvenient. The ADM232LAN uses an on-chip DC-to-DC converter and charge pump to develop the positive and negative voltages required by RS-232 drivers. This topology avoids external ±12 V rails, although the external capacitors must be connected correctly and placed close to the device. The receiver converts incoming RS-232 voltage levels to CMOS-compatible logic, while each driver converts CMOS logic into RS-232 output levels. Typical uses include RS-232 ports in industrial controllers, laboratory instruments, barcode and data-acquisition equipment, configuration interfaces, and legacy computer peripherals. A two-channel implementation is especially useful where one port carries data and another carries control or status information. PCB design should reserve the documented charge-pump capacitor connections and provide adequate copper and grounding around the interface. Because the ADM232LAN is packaged in a 16-pin DIP, existing through-hole layouts may be easier to reuse than with a surface-mount alternative. Verify signal levels, capacitor values, grounding, and system shutdown behavior before substituting another RS-232 transceiver. This page combines verified distributor and datasheet-search information with practical interface-design guidance. It also distinguishes package-compatible alternatives from functionally similar devices that require different footprints or external-capacitor arrangements, helping engineers assess replacement risk before changing an RS-232 design.

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ADM232LAR - 5V 2/2 RS-232 Transceiver, 120kB/s | Analog Devices
ADM232LAR

ADM232LAR - 5V 2/2 RS-232 Transceiver, 120kB/s | Analog Devices

The Analog Devices ADM232LAR is a 5 V-powered CMOS RS-232 line driver and receiver providing two drivers and two receivers (2/2) in a 16-lead SOIC package. It supports data rates up to 120 kB/s, meets all EIA-232-E and V.28 specifications, and delivers a 9 V output swing from a single 5 V supply. An RS-232 transceiver is an interface IC that translates logic-level CMOS signals into the bipolar, +/- voltage signalling used by the RS-232 (EIA-232) standard. It sits between a UART or microcontroller and a physical cable. The wider ADM2xx family of line drivers and receivers was designed for EIA-232-E and V.28 communications interfaces, especially where +/-12 V supplies are not available, and the ADM232 in particular adds on-board DC-DC converters so no external charge-pump components or negative supply are needed. Key features include a single 5 V power supply, on-board DC-DC converters with 9 V output swing capability, small 1 uF external capacitors, a low-power shutdown mode, 1 uA receiver operation while in shutdown, and receiver inputs tolerant to 30 V. The CMOS implementation keeps power consumption low compared with classic bipolar RS-232 transceivers. Technically, the part uses an on-chip switched-capacitor DC-DC converter to generate the positive and negative rail voltages required for compliant RS-232 output levels, while the receiver stage is designed for high noise immunity and failsafe operation when the driver is disabled or the line is unconnected. The result is full RS-232 compliance from a single rail, which simplifies board layout and reduces the external component count to a small number of 1 uF capacitors. Typical applications include industrial serial port adapters, instrumentation and test equipment, barcode and data-collection terminals, security and access-control panels, and general-purpose RS-232 links between a host UART and peripheral equipment where cable lengths and ground offsets require the +/- voltage swing of the RS-232 standard. When designing around the ADM232LAR, place the 1 uF capacitors close to the charge-pump and driver pins, keep the RS-232 connector and cable routing separated from sensitive analog and clock traces to limit EMI, and account for the shutdown pin when the host needs to tri-state or power down the port. Because the receivers remain active in shutdown, the interface can still report line state while the driver current is minimized. This page consolidates distributor listings, verified datasheet features, drop-in replacement options in the identical 16-SOIC footprint, and practical PCB and EMI design notes that are not assembled in one place in the original manufacturer documentation.

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ADM232LJN - 5V RS-232 Transceiver | Analog Devices
ADM232LJN

ADM232LJN - 5V RS-232 Transceiver | Analog Devices

The Analog Devices ADM232LJN is a 5 V-powered CMOS RS-232 transceiver with two transmitters and two receivers, supplied in a 16-pin PDIP package. It supports 120 kB/s data rates, on-board DC-DC converters, approximately ±9 V output swing from a 5 V supply, 1 µF external capacitors, low-power shutdown, and receiver inputs that remain active during shutdown. According to the manufacturer product page, the ADM232L family is intended for EIA-232-E and V.28 communications interfaces where ±12 V is not available. An RS-232 transceiver is an interface IC that combines differential signal drivers and receivers for serial data communication over single-ended, bipolar RS-232 links. The transmitter converts logic-level signals into RS-232 levels, while the receiver converts bipolar RS-232 inputs back into CMOS-compatible logic levels. In the product hierarchy, an RS-232 transceiver is a line driver/receiver, a communications interface IC, and a semiconductor designed to bridge modern digital logic and older serial-interface equipment. The ADM232LJN combines a single 5 V supply with onboard charge-pump DC-DC converters, allowing the device to generate the bipolar voltage levels needed for RS-232 transmission without separate ±12 V rails. Its specified 120 kB/s data rate supports legacy serial ports, industrial equipment, and control systems. The approximately ±9 V output swing provides the required interface voltage amplitude while the CMOS implementation supports operation from one 5 V supply. The interface also includes low-power shutdown to reduce power dissipation when the link is not active. The receivers are specified as active in shutdown, allowing selected receive paths to remain operational during a low-power state. The use of small 1 µF capacitors makes the charge-pump and supply bypassing network relatively compact, which is useful in equipment where PCB area is constrained. Typical applications include legacy PC serial ports, industrial instrumentation, barcode scanners, test equipment, embedded control systems, and communications links to equipment designed for EIA-232-E or V.28 interfaces. The device is particularly useful where the system has a 5 V logic rail but the connected peripheral requires RS-232 signal levels. Designers should preserve the intended capacitor values, place charge-pump capacitors close to their specified pins, and route the RS-232 connector and cable interface away from sensitive analog or high-speed digital circuitry. The verified ADM232LJN data confirms a 16-pin PDIP package and a 120 kB/s data rate, but it does not provide a complete public pin-by-pin pinout or current distributor price table in the supplied material. This page consolidates the verified manufacturer and distributor information, separates confirmed specifications from unavailable data, and identifies a confirmed same-package family alternative. It also provides practical selection guidance for engineers choosing between single-supply RS-232 transceivers and legacy multi-rail implementations.

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ADM232LJR - 5V 120kbps RS-232 Transceiver | Analog Devices
ADM232LJR

ADM232LJR - 5V 120kbps RS-232 Transceiver | Analog Devices

The Analog Devices ADM232LJR is a 5 V powered RS-232 line-driver and receiver IC with two drivers, two receivers, a 120 kbps data rate, and a 16-pin SOIC package. It provides ±9 V output swing, onboard DC-DC converters, and 1 µF charge-pump capacitors, allowing EIA-232-E and V.28 communication without external ±12 V rails. The receiver remains active during shutdown according to the supplied manufacturer-family data. An RS-232 transceiver is an interface IC that converts logic-level signals into differential bipolar voltages for transmission and converts received bipolar voltages back into CMOS-compatible logic levels. In the product hierarchy, it belongs to the communications interface IC class, where it bridges a host controller or UART with a cable-based RS-232 port. Unlike RS-422 and RS-485 interfaces, RS-232 uses single-ended signaling referenced to ground and is primarily intended for point-to-point communication. The ADM232LJR operates from a single 5 V supply and supports data rates up to 120 kbps. Its integrated DC-DC converter generates the positive and negative voltage levels required by the EIA-232-E drivers without requiring an external dual supply. Other documented features include low-power shutdown, 1 µF external charge-pump capacitors, approximately ±9 V driver output swing from a 5 V supply, and receiver input protection rated to 30 V. The device contains two transmit channels and two receive channels, allowing two serial ports or one full-duplex port with flow-control signals to share one package. Its CMOS-compatible digital inputs connect directly to the transmit and shutdown-control circuitry of microcontrollers, DSPs, and embedded processors. The balanced set of receive and transmit functions supports protocol-handshake signals as well as primary data channels without requiring separate RS-232 line-driver ICs. Typical uses include industrial serial consoles, point-of-sale equipment, instrumentation, embedded control systems, and legacy peripheral connectivity. The 120 kbps rate comfortably supports many UART protocols and short-distance point-to-point links. Systems that previously used ±12 V RS-232 can simplify their power architecture by using one 5 V rail, provided the selected connector, cable, and protection network are suitable for the intended installation. Designers should use the manufacturer's recommended charge-pump capacitor values and observe polarity and voltage limits on all interface pins. The 30 V receiver-input rating does not permit unrestricted hot-plug or surge exposure, so external protection may still be required for exposed industrial cabling. The shutdown function should also be checked against the system requirement because the supplied family data states that the receivers remain active while the drivers are shut down. This page combines verified manufacturer and distributor information, package-aware replacement guidance, application engineering notes, and a specification comparison that are not consolidated on a typical distributor product listing. The alternatives are presented as candidates that still require schematic, pinout, and system-level verification before substitution.

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ADM233LAN - 5V RS-232 Transceiver, 120kB/s | Analog Devices
ADM233LAN

ADM233LAN - 5V RS-232 Transceiver, 120kB/s | Analog Devices

The Analog Devices ADM233LAN is a 5 V RS-232 transceiver with two drivers and two receivers, a maximum data rate of 120 kB/s, and integrated DC-DC converters that produce ±9 V output swing from a single 5 V supply. The device is supplied in a 20-pin PDIP package and is intended for EIA-232-E and V.28 communications interfaces. An RS-232 transceiver is an interface IC that combines differential line-driver and receiver functions with the voltage conversion required by the EIA-232 standard. It belongs to the interface IC hierarchy, where an RS-232 transceiver operates between a digital logic circuit and a wired communications port. This is particularly useful when the equipment-side logic supply is 5 V but the RS-232 port requires positive and negative signal voltages. Key features include operation from one 5 V supply, support for data rates up to 120 kB/s, on-board DC-DC converters, ±9 V output swing, and operation with small 1 µF capacitors. The integrated charge-pump circuitry eliminates the need for a separate external power-supply circuit, reducing board area and simplifying serial-interface implementation. Technically, the ADM233LAN is a 2/2 full RS-232 transceiver: two transmitter channels and two receiver channels are provided in one package. Its on-board converters generate the bipolar voltage levels required by RS-232 while the device interfaces with conventional 5 V CMOS logic. This integration is valuable in compact industrial, instrumentation, and embedded systems where component count and PCB area are constrained. Typical uses include RS-232 test equipment, data-acquisition systems, industrial control links, service interfaces, and legacy peripheral connections. In these applications, the device can translate 5 V TTL or CMOS UART signals to and from the bipolar RS-232 interface. Designers should still include appropriate line protection and verify signal-integrity requirements in long or electrically noisy installations. A primary design consideration is charge-pump capacitor selection and placement. The manufacturer documentation specifically highlights small 1 µF capacitors, and these components should be placed close to the associated device pins to minimize loop area and preserve stable converter operation. Decoupling, grounding, and protection requirements should be implemented according to the manufacturer datasheet. This page consolidates the verified manufacturer and distributor information with a pin-compatible family alternative, parameter comparison, application guidance, and practical interface-design notes. It distinguishes documented electrical facts from parameters that require confirmation in the current manufacturer datasheet or distributor inventory record.

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ADM233LJN - 2/2 RS-232, 5V, 120kbps | Analog Devices
ADM233LJN

ADM233LJN - 2/2 RS-232, 5V, 120kbps | Analog Devices

The Analog Devices ADM233LJN is a 5 V-powered CMOS RS-232 transceiver with two drivers and two receivers, a 120 kbit/s data rate, and a 20-pin PDIP package. Its integrated DC-DC converter produces approximately ±9 V output swing from a single 5 V supply, while its small 1 µF charge-pump capacitors simplify implementation of EIA-232-E and V.28 interfaces. An RS-232 transceiver is an interface IC that converts logic-level digital signals into differential bipolar transmission signals and converts received bipolar signals back into CMOS logic levels. The ADM233LJN belongs to the RS-232 transceiver category, where it bridges the gap between low-voltage digital systems and the voltage-tolerant, ground-referenced communication interface historically defined by RS-232. Key features include one 5 V supply, two driver and two receiver channels, operation at 120 kbit/s, onboard DC-DC conversion, ±9 V output swing, low-power shutdown, and 1 µF external charge-pump capacitors. The receiver input withstands voltages up to 30 V, while shutdown keeps the receivers active, allowing a connected system to retain incoming data during a local transmitter shutdown. The integrated charge-pump architecture eliminates the need for a separate ±12 V supply and reduces external component count compared with conventional RS-232 implementations. The transmitter actively drives the RS-232 signal levels, while the receiver provides noise tolerance and level translation for incoming data. This makes the device suitable for equipment in which a modern 5 V logic supply is available but a legacy computer serial port is not. Typical applications include industrial serial adapters, point-of-sale terminals, instrumentation, barcode scanners, security equipment, and embedded control systems. The ADM233LJN is particularly useful when a PCB must implement a full RS-232 port using only a 5 V rail and through-hole assembly, while its integrated converters reduce the external power-tree complexity. Designers should verify the external charge-pump capacitor values, connector protection, and ground arrangement against the manufacturer datasheet. Although the receiver tolerates inputs up to 30 V, exposed RS-232 connectors should receive appropriate surge and electrostatic-discharge protection. Decoupling and charge-pump capacitor placement also require careful PCB layout to minimize switching noise and data errors. This page combines verified manufacturer specifications, current sourcing information, drop-in replacement analysis, and practical application guidance. It also distinguishes verified electrical differences from unknown parameters so engineers can assess PCB, regulatory, and lifecycle implications before committing to a design.

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ADM234LAN - 5V RS-232 Driver/Receiver | Analog Devices
ADM234LAN

ADM234LAN - 5V RS-232 Driver/Receiver | Analog Devices

The Analog Devices ADM234LAN is a 5 V-powered CMOS RS-232 driver and receiver IC with four driver channels and four receiver channels in a 16-pin PDIP package. It supports EIA-232-E and V.28 communications interfaces without requiring external ±12 V supplies. Verified data identifies a 120 kB/s data rate, on-board DC-DC converters, 9 V output swing from a 5 V supply, low-power shutdown, 1 A receiver inputs, and receiver inputs that remain active during shutdown. A line transceiver is an interface IC that converts logic-level signals into RS-232 voltage levels and converts received RS-232 signals back into CMOS-compatible logic. The ADM234LAN belongs to the line-driver and receiver hierarchy, within interface transceivers and communications interface ICs. Its integrated charge-pump and DC-DC circuitry allows a single-ended 5 V supply to generate the positive and negative voltage levels required by a conventional RS-232 port. The four transmitters and four receivers make the ADM234LAN suitable for implementing a complete multi-channel RS-232 interface on one integrated circuit. Its 120 kB/s rated data rate supports legacy serial links, industrial equipment, data-acquisition systems, and control equipment that use EIA-232-E or V.28 signaling. The 9 V output swing provides the voltage amplitude needed by RS-232 while the receiver section handles signals arriving from a cable-connected remote device. The device includes low-power shutdown control and receiver behavior designed to remain operational while the rest of the interface is shut down. That feature can simplify asynchronous serial designs in which one channel must monitor a remote link while the remaining transmitter and receiver functions are inactive. The receiver input also withstands 30 V, increasing tolerance to transients and voltage levels encountered on external RS-232 connections. The ADM234LAN is supplied in a 16-pin PDIP package, making it appropriate for legacy through-hole boards, prototypes, and industrial control systems that use conventional DIP footprints. Designers should provide the required external capacitors, route the interface connector and cable ground appropriately, and verify every signal pin against the current manufacturer datasheet before production use. For a new design, the ADM234LAN offers a practical way to add RS-232 capability from one 5 V rail without implementing an external switched-capacitor inverter. Its tradeoff is the relatively slow 120 kB/s data rate compared with USB, LVDS, or modern high-speed differential interfaces. The ADM234LAN is therefore most appropriate where protocol compatibility and legacy EIA-232-E or V.28 support matter more than throughput.

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