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MC1488P - Quad RS-232 Line Driver | STMicroelectronics
The STMicroelectronics MC1488P is a monolithic quadruple RS-232 line driver with four differential driver channels in a 14-pin PDIP package. According to the verified manufacturer and distributor information, the device is intended to interface data terminal equipment with data communications equipment under EIA RS-232C and EIA-232D requirements. Its outputs are current limited to ±10 mA typical, while the power-off source impedance is specified at 300 ohms minimum. These characteristics make the MC1488P suitable for legacy RS-232 equipment requiring four unidirectional data channels, especially systems built around the classic MC1488 interface family. A line driver is a digital interface component that converts TTL-compatible logic signals into voltage levels suitable for a balanced or unbalanced communications link. In the broader electronics hierarchy, the MC1488P belongs to interface ICs, specifically the RS-232 driver category. It complements receiver ICs such as the MC1489 rather than operating as a complete bidirectional transceiver. Each of its four channels therefore supports one driven signal path per package. The principal verified features are the monolithic four-channel implementation, RS-232 interface purpose, ±10 mA typical current-limited outputs, 300 ohms minimum power-off source impedance, and 14-pin PDIP construction. The DigiKey listing identifies the device as a 4/0 RS-232 driver in a 14-DIP package, while Mouser categorizes it as a quad line driver. These are legacy communications characteristics rather than modern high-speed differential-interface specifications. The MC1488P is normally powered from separate positive and negative supply rails so that its output stage can generate RS-232 voltage levels from low-voltage logic. Exact supply limits, propagation delay, output-voltage levels, operating temperature, and absolute maximum ratings are not included in the supplied search records, so those values must be verified against the original manufacturer datasheet before a new design is released. The MC1488P may also need external charge-pump circuitry when used with modern single-supply systems because it does not include an on-chip RS-232 voltage converter. Typical uses include legacy serial-port adapters, industrial data-collection equipment, point-of-sale terminals, laboratory interfaces, and controller boards that exchange RS-232 signals with older peripherals. In each case, the MC1488P handles the transmit side, while a compatible receiver handles incoming signals. Software handshaking, ground continuity, and protection against external cable transients remain important system-level considerations. Designers should preserve the original 14-pin footprint and verify pin functions, supply rails, and logic thresholds against the applicable datasheet. Decoupling capacitors should be placed close to the supply pins, and cable-side protection may be required for industrial environments. Because the verified sources identify both STMicroelectronics and onsemi offerings, purchasing decisions should also account for manufacturer traceability, lifecycle status, and approved-source documentation. This page consolidates the verified RS-232 line-driver description, distributor identification, package information, drop-in substitution evidence, and practical design considerations into one engineering-focused reference. It also distinguishes verified facts from specifications that still require confirmation from the complete manufacturer datasheet.
MC1488PG - Quad RS-232 Line Driver | onsemi | PDIP-14
The onsemi MC1488PG is a monolithic quadruple RS-232 line driver with four driver outputs, designed for EIA-232D data-terminal and data-communications equipment interfaces. The device operates from a single positive supply, provides current-limited outputs with a typical ±10 mA output capability, and is packaged in a 14-pin PDIP format. Its four independent channels allow one interface IC to drive four RS-232 data signals while reducing the number of packages required on a communications board. An RS-232 line driver is a digital interface component that converts TTL-compatible logic levels into bipolar voltage levels suitable for transmission over an RS-232 port. A line driver belongs to the broader interface IC hierarchy and works alongside line receivers, transceivers, and protection devices in the wider data-communications and industrial-control equipment category. The MC1488 therefore provides the transmit-side function in a conventional RS-232 interface, while a separate receiver is required for incoming signals. Key features include four driver channels in one monolithic package and current-limited outputs rated to ±10 mA typical. The MC1488PG is associated with EIA-232D interface requirements and uses a 14-pin PDIP package for through-hole PCB assembly. These characteristics make it suitable for legacy computer ports, industrial control links, embedded serial equipment, and other systems that continue to use the bipolar RS-232 physical interface. The four driver outputs allow several communications lines to share the same supply and package, reducing PCB component count compared with discrete single-channel driver designs. Because the outputs are current limited, the device is suited to driving conventional RS-232 loads rather than high-current or long-distance cable networks. Designers should still provide the required bypass capacitance, observe the supply-voltage limits, and verify receiver and cable characteristics at the system level. Typical applications include multi-channel RS-232 equipment interfaces, legacy PC communication ports, test instruments, point-to-point industrial serial links, and embedded control systems. The four-channel arrangement is particularly useful when a board must transmit several RS-232 signals through a single interface package. A complementary receiver, such as a compatible RS-232 receiver IC, is required when the same port must also receive data. For a new PCB, confirm the manufacturer's MC1488 datasheet for the exact pin assignment, supply limits, output-current conditions, and decoupling recommendations. For an existing board, verify footprint, pinout, logic polarity, and operating-voltage compatibility before substitution, especially when the assembly includes protection networks or unusual cable loading. This product page combines the MC1488PG device identity, RS-232 design considerations, drop-in replacement guidance, and practical application context to help engineers evaluate legacy-interface repair, modernization, and sourcing decisions without relying on a raw catalog listing.
MC1489AM - Quad EIA-232D Receiver | onsemi | SOIC-14
onsemi MC1489AM is a monolithic quad line receiver designed to interface data terminal equipment with data communications equipment conforming to EIA-232D. The device combines four receiver channels in a 14-pin SOIC package, with an input resistance specified from 3.0 kΩ to 7.0 kΩ and an input signal range extending to 30 V. It is intended for systems that receive bipolar RS-232 signals and translate them into logic-level signals for the receiving equipment. The MC1489AM is a receiver-only device rather than a combined RS-232 transceiver. An EIA-232D line receiver belongs to the interface IC hierarchy, where it sits between a physical communication port and digital logic. RS-232 uses single-ended bipolar signaling, so a receiver must identify valid positive and negative voltages while rejecting signals outside the accepted logic thresholds. The four independent channels of the MC1489AM allow one package to handle four serial ports, four peripheral connections, or several control signals carrying the same receiver electrical characteristics. The primary electrical feature is its 3.0 kΩ to 7.0 kΩ input resistance. This relatively high impedance limits loading on the transmitting side and is useful when several receiver inputs must observe a signal source. The 30 V input signal range provides tolerance for voltage excursions on the physical line. Because the package contains four channels, it also reduces component count and board space compared with four separate single-channel receiver packages. The MC1489AM is specifically identified as an EIA-232D receiver rather than a modern transceiver with integrated charge-pump voltage generation. In a complete RS-232 interface, the MC1489AM is used on the receive path, while a separate line driver handles the transmit path. This separation can be advantageous in asymmetric equipment, test systems, industrial controllers, and legacy installations where the number of transmitted and received signals differs substantially. Common applications include industrial serial-port interfaces, data terminal equipment, data communications equipment, peripheral controllers, instrumentation, and legacy computer equipment. Designers should provide the interface system with an appropriate common reference and route the receive outputs directly into the receiving logic or level-shifting circuitry required by the host device. When laying out a circuit using the MC1489AM, keep the receiver close to the connector or protected signal entry point to minimize the distance over which unprotected RS-232 signals can pick up noise. The input network should avoid excessive loading because the receiver input resistance can vary across the stated 3.0 kΩ to 7.0 kΩ range. Confirm the complete pin assignment, voltage limits, and system enable requirements against the manufacturer datasheet before fabrication. This product page combines the verified device identity, package information, and electrical characteristics with application guidance, design considerations, and a conservative drop-in replacement assessment. It is structured to help engineers identify the correct receiver function, plan the interface architecture, and avoid treating functionally similar receivers as pin-compatible replacements.
MC1489AN - Quad RS-232 Receiver, 5V, 14-PDIP | Texas Instruments
The Texas Instruments MC1489AN is a quadruple RS-232 line receiver integrated circuit with four independent receiver channels, a 4.5 V to 5.5 V single supply, and a 14-pin PDIP package. Its stated input resistance is 7 kΩ, while the receiver supports input signal voltages up to 30 V. Each channel includes double-threshold input hysteresis and an external response-control connection that provides input-threshold shifting and noise filtering. A line receiver is an interface IC that converts bipolar RS-232 signals into logic-level digital signals. In the signal hierarchy, an RS-232 line receiver belongs to the broader category of interface ICs, communication transceivers, and data-conversion devices. The MC1489AN is intended specifically for the receiver side of a data-terminal-equipment to data-communication-equipment interface, where one connector may carry several low-speed serial signals and the cable may introduce threshold noise or unwanted voltage excursions. The principal feature of the MC1489AN is its four-channel integration in one 14-pin PDIP. Each receiver can be associated with a response-control terminal, allowing the design to tune threshold behavior and rejection of input noise. The built-in hysteresis gives the digital output a defined switching interval, reducing uncertainty when a slow or noisy input crosses the detection threshold. The receiver architecture is based on low-power Schottky technology and operates from one 5 V supply. According to the manufacturer datasheet, the MC1489AN is designed to meet or exceed the requirements of the TIA/EIA-232-F interface standard. Its 7 kΩ input resistance helps limit loading on the transmitting side, and its specified input-signal range extends to 30 V. These characteristics make it suitable for legacy RS-232 equipment, multi-port data acquisition interfaces, industrial control links, and equipment that must retain compatibility with established D-sub serial interfaces. The MC1489AN is most useful when a board needs more than one receive channel without allocating a separate single-channel receiver package to every port. Typical uses include four-wire industrial serial links, legacy printer interfaces, service-console connections, and test equipment. Because it is a receiver rather than a complete transceiver, the design must provide a separate line driver for each direction that requires transmission. Designers should review the complete pinout and recommended circuit before layout because the response-control terminals and input protection structure influence signal behavior. Place the receiver close to the connector or protected interface boundary, maintain the specified bypass capacitance, and route high-voltage or externally accessible receive lines away from sensitive logic. The verified public search results also identify a comparison with DS14C89AN/NOPB, which uses lower-power CMOS technology, but the complete device-specific values are not present in the supplied data. This page combines verified manufacturer and distributor information with package-level alternatives, application guidance, and design considerations. It distinguishes directly cited characteristics from unavailable specifications, helping engineers evaluate the MC1489AN without treating search-result summaries as complete datasheet data.
MC1489AP - Quad RS-232 Receiver | STMicroelectronics
STMicroelectronics MC1489AP is a monolithic quad line receiver designed for RS-232 data-terminal and data-communication interfaces, with four receiver channels in a 14-pin DIP package. The device provides a 3.0 kΩ to 7.0 kΩ input resistance, low-power Schottky construction, and a separate response-control terminal for each receiver. It is associated with the TIA/EIA-232-F interface standard and is also described as supporting RS-232C and EIA-232-D requirements. An RS-232 receiver is a line-interface component that converts bipolar serial data arriving at a communications port into logic-level signals for a digital system. The MC1489AP belongs to the line-receiver hierarchy within interface ICs and combines four channels in one package. Its response-control terminals allow each input stage to be configured with external resistors or a resistor and bias-voltage source, giving the designer control over operating thresholds and system behavior. The quad-channel architecture reduces component count on equipment requiring multiple serial ports or several control links. Its specified input resistance of 3.0 kΩ to 7.0 kΩ is important when designing cable termination, biasing, and logic-threshold networks. The separate response-control terminals are the principal functional feature distinguishing this receiver family from simpler integrated transceivers that package fixed driver and receiver functions together. The MC1489AP is based on low-power Schottky line-receiver circuitry. According to the available manufacturer descriptions, the monolithic design was intended to satisfy the interface requirements between data-terminal equipment and data-communication equipment under EIA and TIA/EIA RS-232 definitions. Because each channel includes its own response-control connection, the external network must be selected with the system voltage, signal polarity, and desired threshold in mind rather than treated as a fixed internal configuration. Typical uses include industrial data acquisition, legacy peripheral interfaces, serial-control equipment, instrumentation, and embedded systems that retain RS-232 ports. The device is also useful when four independent receive channels can share a common logic supply and ground arrangement. Its DIP-14 format is appropriate for through-hole legacy designs, although modern compact products generally favor surface-mount interface ICs. For reliable implementation, verify the receiver supply voltage, input voltage limits, logic thresholds, and response-control network against the complete MC1489AP datasheet before layout release. Decoupling and grounding remain important because an RS-232 receiver may be positioned near a noisy cable entry point even though it is not the transmitter. Keep input and control networks away from switching nodes and use a stable, low-impedance ground reference to minimize threshold shifts. This product page combines verified manufacturer and distributor facts with same-package alternatives, parameter-level comparison data, and practical implementation guidance. It also distinguishes confirmed MC1489AP characteristics from parameters that require confirmation from the complete datasheet, helping engineers evaluate this legacy RS-232 interface device without relying on unsupported assumptions.
MC1489D - Quad EIA-232D Line Receiver | onsemi | SOIC-14
The onsemi MC1489D is a monolithic quad EIA-232D line receiver that converts four differential or bipolar serial data inputs into four compatible logic-level receiver outputs. Its 14-pin SOIC package, 3.0 kΩ to 7.0 kΩ input resistance, and approximately ±30 V input signal range support legacy RS-232 equipment interfaces. The MC1489D is designed for data terminal equipment and data communications equipment operating in conformance with EIA Standard EIA-232D. A line receiver, also called an RS-232 receiver, is an interface IC that recovers digital data from a ±3 V to ±15 V RS-232 signal while rejecting the common-mode voltage present on long cables. Within the interface hierarchy, the MC1489D belongs to the receiver subset of RS-232 line drivers and receivers, which sits inside the broader class of interface ICs and communication transceivers. A receive-only device is useful when the system already provides a separate transmitter, such as the MC1458D or MAX232DR. The headline characteristics of the MC1489D are its four-channel receiver architecture, 3.0 kΩ to 7.0 kΩ input resistance, and approximately ±30 V input signal capability. Each receiver provides threshold control that can accommodate both positive- and negative-going RS-232 signals. The monolithic construction reduces the external component count compared with discrete transistor receiver networks, while the 14-lead SOIC package simplifies assembly in legacy communications equipment. Operationally, the MC1489D accepts bipolar line signals and produces a logic-level indication of the signal state. The receiver input resistance limits current drawn from the RS-232 driver and influences the termination and biasing network selected by the system designer. Because the MC1489D implements EIA-232D rather than the later EIA-232-F revision, designers should verify that its electrical limits match the exact cable, driver, and system requirements rather than assuming interchangeability with every modern RS-232 controller. Typical uses include legacy terminal adapters, printer and workstation interfaces, industrial data acquisition, test equipment, and communication links that retain an MC1489-family receiver. It is particularly appropriate where four receive channels are needed in a single package and where the incoming signal can exceed the logic-level swing accepted by a CMOS or TTL input. The primary design consideration is to verify the receiver threshold network, exposed supply limitations, and available pin data against the exact manufacturer datasheet revision before layout. Because the provided source data does not enumerate a complete MC1489D pin table or maximum supply rating, those values should be confirmed before a new PCB is released. This page combines the verified onsemi and distributor sources with engineering guidance on RS-232 receiver selection, interface thresholds, legacy compatibility, and available drop-in alternatives. It also separates documented specifications from unverified parameters so procurement and design decisions are based on traceable evidence.
MC1489DG - Quad EIA-232D Line Receiver | onsemi
onsemi MC1489DG is a monolithic quad line receiver designed for EIA-232D data-terminal and data-communications interfaces. The device contains four receiver channels, accepts input signals ranging to plus or minus 30 V, and provides an input resistance of 3.0 kOhm to 7.0 kOhm. It is packaged in a 14-pin SOIC measuring approximately 3.90 mm wide with 0.154 inch lead pitch. An EIA-232D line receiver is an interface circuit that converts bipolar RS-232 signals into digital logic levels. It belongs to the receiver category within the broader RS-232 interface IC family. Because RS-232 uses voltage levels and signal conventions that differ from TTL and CMOS logic, a receiver is required between a physical communications port and the digital electronics that process the data. The MC1489DG's four independent receiver sections allow one package to serve several communications channels or several distinct RS-232 ports. Its plus or minus 30 V input signal range provides margin for the voltage excursions encountered in EIA-232D systems. The 3.0 kOhm to 7.0 kOhm input-resistance range identifies the device as a bipolar line receiver rather than a low-voltage CMOS transceiver. The 14-pin SOIC is a surface-mount package suitable for conventional PCB assembly and automated production. Its 0.154 inch pitch matches the widely used narrow-body SOIC footprint family, while the 3.90 mm body width supports compact placement compared with older through-hole receiver packages. Each receiver channel requires the correct external connection and signal conditioning defined by the system interface. Typical uses include RS-232 links between industrial equipment and computers, legacy peripheral ports, point-of-sale equipment, data acquisition systems, and embedded-control consoles. The quad organization is especially useful where four RS-232 inputs must be accepted without installing four separate receiver packages. Designers should still verify channel direction, grounding, signal polarity, and timing against the circuit being interfaced. A key design consideration is that MC1489DG is a receive-only interface. It does not provide the transmit functions required for a complete bidirectional RS-232 port. A separate line driver or transceiver is needed for outbound data. Board design must also preserve adequate spacing and signal return paths so large RS-232 voltage transitions do not create unwanted coupling into nearby low-level circuits. This product page combines manufacturer interface information, package details, application guidance, and focused replacement comparisons for engineers evaluating the MC1489DG in legacy and industrial RS-232 equipment.
MC1489M - Quad EIA-232D Receiver | onsemi | SOIC-14
The onsemi MC1489M is a monolithic quad EIA-232D line receiver with four independent receive channels, a 3.0 kΩ to 7.0 kΩ input resistance, and an input signal range of ±30 V. The device is supplied in a 14-pin SOIC (SOEIAJ-14) surface-mount package for compact data-terminal and data-communications equipment designs. Its receive-oriented architecture converts bipolar RS-232 signals into digital logic levels while providing response-control terminals for adjustable receiver behavior. A line receiver is an interface IC used at the receiving end of a serial communications link. The MC1489M belongs to the broader line-receiver hierarchy, which includes EIA-232D receivers, interface transceivers, and multi-channel communications interface ICs. Its four channels allow one package to support four RS-232 data inputs, reducing component count in equipment with several serial ports, control links, or diagnostic interfaces. The principal verified features include four receiver channels, 3.0 kΩ to 7.0 kΩ input resistance, and ±30 V input signal capability. Each receiver includes a response-control terminal to which a resistor, or a resistor and bias-voltage source, can be connected. This control allows the receiving behavior to be adjusted when the interface must accommodate different signaling thresholds or system-level conditions. The MC1489M uses Schottky-related input structures to support low-power operation while receiving high-voltage bipolar signals. This is useful in EIA-232D equipment because the transmitter side supplies positive and negative voltages relative to the logic ground. The receiver therefore must tolerate a substantially wider input range than the logic devices connected to its outputs. The four-channel arrangement also preserves separate receive paths for simultaneous or independently controlled links. Typical uses include RS-232 data-terminal equipment, industrial serial interfaces, instrumentation links, peripheral ports, and embedded systems that receive bipolar serial data. In such equipment, the MC1489M can sit between an external RS-232 connector and TTL or CMOS logic. The logic source impedance, grounding arrangement, and response-control network must be selected so the complete interface meets the intended EIA-232D system requirements. Designers should pay particular attention to supply grounding, receiver input protection, unused control pins, and signal routing. A solid signal-ground reference, controlled traces, and appropriate input resistors are essential because RS-232 connectors can be exposed to ESD and other transients. Pin functions and electrical limits must be confirmed against the manufacturer datasheet before layout release or substitution. This product record combines the verified onsemi datasheet information, distributor availability references, cross-reference candidates, and engineering-oriented selection guidance. It distinguishes confirmed drop-in candidates from general functional equivalents and highlights where additional electrical or lifecycle verification is still required.
MC1489MG - Quad EIA-232D Receiver | onsemi | 14-SOIC
The onsemi MC1489MG is a monolithic quadruple EIA-232D line receiver designed for data-terminal equipment and data-communication equipment interfaces. It contains four receiver channels in a 14-pin SOIC package, accepts input signals ranging from ±30 V, and presents an input resistance between 3.0 kΩ and 7.0 kΩ. The MC1489MG is identified as a commercial extended-temperature grade device. An EIA-232 line receiver is an interface IC that converts bipolar RS-232 voltage levels into digital logic levels. It belongs to the line-receiver class within interface ICs, a larger functional group that also includes RS-232 drivers, transceivers, and multi-protocol interface devices. Unlike a transceiver, the MC1489MG performs reception only, allowing equipment with separate transmit and receive signal paths to use a dedicated receiver for each direction. The four-channel architecture reduces the component count in equipment that exchanges multiple serial signals. Each receiver has a response-control function, which permits a resistor or a resistor and bias-voltage source to influence receiver behavior. Input resistance of 3.0 kΩ to 7.0 kΩ provides the required input loading for EIA-232D interfaces, while the ±30 V input signal range supports the voltage excursions characteristic of RS-232 signaling. The MC1489MG is based on a monolithic low-power Schottky receiver design. This implementation supports four independent receive channels without requiring a separate receiver package for every signal. Because the part contains receivers rather than transmitters, it cannot independently generate the RS-232 voltage swings required to drive a remote communication port; it must be paired with an appropriate line driver when a design needs both transmission and reception. Typical uses include industrial serial interfaces, data-terminal equipment, data-communication equipment, remote-control links, and legacy RS-232 ports. The device is particularly relevant when an existing design requires four receive channels in a single 14-pin surface-mount package. Its commercial extended temperature designation also makes it a candidate for equipment operating outside the usual consumer temperature range. PCB design should preserve the EIA-232 input network, provide a stable supply and ground reference, and route each receiver input away from fast switching or high-current paths. The response-control terminals should be left at the configuration shown in the manufacturer application guidance. Review the pin-description table and operating limits in the manufacturer datasheet before finalizing the footprint and external networks.
MC1489N - Quad RS-232 Line Receiver | Texas Instruments
The Texas Instruments MC1489N is a monolithic quadruple RS-232 line receiver designed for TIA/EIA-232-F data-terminal and data-communication interfaces. It provides four receiver channels, operates from a single 4.5 V to 5.5 V supply, accepts input signals spanning ±30 V, and is offered in a 14-pin PDIP package. Each receiver includes a response-control input that supports threshold shifting and input-noise filtering. A line receiver is an interface-circuit category used to convert bipolar RS-232 signals into logic-level signals suitable for digital equipment. In the broader hierarchy, a receiver belongs to an interface IC, then to a communications or transceiver IC, and ultimately to the semiconductor family. The MC1489N is a receive-only counterpart to RS-232 driver ICs and is suitable wherever a design needs multiple incoming serial-data channels but no integrated transmit channels. The principal features include four independent receivers, a low-power Schottky implementation, approximately 7 kΩ input resistance, a ±30 V input signal range, and operation from one 4.5 V to 5.5 V supply. Built-in input hysteresis provides double switching thresholds, which helps prevent noise from repeatedly changing receiver output states around a transition point. The response-control terminals provide additional control over receiver thresholds and noise filtering. Technically, the MC1489N separates the high-voltage RS-232 input domain from the digital output domain. Each channel accepts a bipolar signal referenced to the receiver's ground, while the receiver's response-control terminal can be connected to a resistor or to a resistor and bias-voltage source. This arrangement permits circuit-level adjustment when a system requires particular threshold or filtering behavior. Typical applications include multi-channel serial data acquisition, industrial control links, legacy peripheral interfaces, test equipment, point-to-point communications equipment, and systems requiring several RS-232 inputs. The 14-pin PDIP package also makes the device suitable for through-hole prototypes and designs assembled with conventional DIP sockets. When laying out a board around the MC1489N, keep each input route away from fast digital switching nodes and connect its response-control network close to the relevant receiver pin. Because the device is receive-only, a separate RS-232 driver is required for a design that also needs to transmit. The supplied manufacturer and distributor sources do not publish a complete verified pin table or current unit price in the retrieved data. This page consolidates the verified manufacturer description, package and supply information, distributor availability references, and carefully qualified replacement candidates. It also adds comparison, application, and design guidance that is not normally visible in a short distributor listing, while clearly separating verified facts from values that still require datasheet or distributor confirmation.
MC1489P - Quad RS-232 Line Receiver | STMicroelectronics
The STMicroelectronics MC1489P is a four-channel RS-232 line receiver IC with a 14-pin PDIP package. The device accepts four receiver channels, provides logic threshold shifting, incorporates input hysteresis, and includes built-in response control for input-noise filtering. According to the manufacturer datasheet listing, the input resistance is 7 kΩ, the input signal range is ±30 V, and the maximum supply voltage is 10 V. A line receiver is an interface IC that converts electrical signals arriving over a communication link into logic-level signals for a host controller. As part of the broader hierarchy of interface ICs, line receivers belong to the RS-232 transceiver family and operate alongside line drivers in point-to-point or multidrop serial interfaces. The MC1489P provides four receivers in one package, allowing one device to handle four incoming data channels while reducing board area and component count. The receiver architecture includes logic threshold shifting, which accommodates RS-232 negative and positive signaling, and input hysteresis, which helps the receiver maintain a defined switching state in the presence of small input-voltage variations. The built-in response control provides input-noise filtering, making the MC1489P suitable for systems where the received serial data must be converted into dependable digital levels. A maximum supply voltage of 10 V provides the key verified operating limit for the supplied device. The MC1489P is identified as a commercial extended part in the available product data, with an operating temperature range of 0°C to +70°C and a PDIP-14 through-hole package. It is supplied in a tube format for automated or manual production handling. The four-channel arrangement is useful in industrial control links, peripheral interfaces, instrumentation, and embedded systems that need several receive functions without using four separate single-channel receiver packages. Typical applications include multi-channel RS-232 equipment interfaces, industrial controller serial ports, data-acquisition equipment, test and measurement systems, and embedded control consoles. Because the verified data identifies the part as a receiver rather than a combined transceiver, it is best used on the receive side of an RS-232 connection. A transmit driver may be required separately when the same board also needs to originate RS-232 signals. The primary design consideration is to validate every external signal against the documented ±30 V input range and to operate the receiver from a supply no greater than 10 V. PCB layout should preserve the pin assignments of the PDIP-14 footprint, provide an unobstructed ground connection, and avoid placing high-current switching paths adjacent to receiver inputs. The available product listing reports a 7 kΩ input resistance, so cable termination and input-biasing decisions should account for that loading. This page consolidates verified distributor information, package details, practical application guidance, and cross-reference results for the MC1489P. It also distinguishes documented pin-compatible alternatives from parts that are merely functionally similar, helping engineers make package and footprint decisions before committing to a replacement.
MC1489PG - Quad EIA-232D Receiver | onsemi | 14-PDIP
The onsemi MC1489PG is a monolithic quad line receiver designed for EIA-232D data-terminal and data-communication interfaces, with four receiver channels and a 3.0 kΩ to 7.0 kΩ input resistance in a 14-pin PDIP package. The 0.300-inch, 7.62 mm package supports conventional through-hole PCB layouts and provides a direct interface between RS-232 line signals and digital logic systems. An EIA-232D line receiver is an interface IC that converts bipolar RS-232 signal levels into logic-compatible signals for digital equipment. The receiver belongs to the RS-232 interface hierarchy, where transceivers combine receive and transmit functions and line drivers provide the complementary output stage. A quad receiver integrates four independent channels in one package, reducing component count and simplifying parallel serial-interface designs. The MC1489PG provides four EIA-232D receivers, an input resistance specified from 3.0 kΩ to 7.0 kΩ, and a 14-pin PDIP package. Each channel includes a response-control function in the device family architecture, allowing the receiver to be enabled or disabled according to the surrounding interface design. The through-hole package also makes the device suitable for legacy industrial, telecommunications, instrumentation, and control systems where plated-through-hole assembly remains common. The monolithic construction places four receiver sections on one semiconductor device and standardizes the electrical interface for EIA-232D equipment. Input impedance limits the loading applied to the connected RS-232 source, while the receiver threshold determines whether a differential line voltage is interpreted as a valid logic state. Designers should use the manufacturer datasheet pin-description table and operating-limit tables when assigning inputs, response-control terminals, supply connections, and ground returns. Typical uses include multi-channel RS-232 data acquisition, industrial console links, equipment-control interfaces, legacy serial adapters, and embedded systems that communicate with older peripherals. The four-channel arrangement is especially useful when a system exchanges several independent RS-232 signals or requires a receive-only interface alongside a separate line-driver device. When laying out the PCB, route the four receiver inputs away from switching nodes and place interface protection close to connector entries. Confirm the receiver enable state during reset, keep ground returns short, and test every unused channel for a defined logic level. The DIP footprint simplifies through-hole assembly, but the 7.62 mm pin pitch still requires adequate spacing for soldering and connector routing. This product page combines the verified MC1489PG identification, package information, EIA-232D function, receiver count, input-resistance range, source links, and technically constrained replacement analysis to support component selection, board review, sourcing, and design-in decisions.
MC33121P - Low-Voltage SLIC Interface | Motorola | PBX
The Motorola MC33121P is a low-voltage Subscriber Line Interface Circuit (SLIC) designed to connect the four-wire side of a central office or PBX to a two-wire subscriber line in a 14-pin plastic DIP package. It provides battery feed, loop-termination AC impedance, hookswitch detection, adjustable transmit, receive, and transhybrid gains, and single or double fault indication. The verified MC33121P listing identifies a 14-PDIP package, while the available technical material specifies a minimum longitudinal balance of 58 dB. A Subscriber Line Interface Circuit, or SLIC, is an integrated telecommunications interface that replaces many discrete functions associated with a analog telephone line. In the broader hierarchy, it is a specialized line interface IC within interface ICs and telecommunications semiconductors. It bridges a central-office or PBX voice path and a subscriber loop while separating transmit and receive signals, supporting line termination, and exposing hookswitch and fault information to the surrounding codec or control electronics. The MC33121P integrates several line-facing functions into one device. Battery feed supplies the line, while proper loop termination establishes the intended AC impedance seen by the subscriber. Adjustable transmit, receive, and transhybrid gains allow the surrounding system to control voice-path levels and balance. Hookswitch detection reports line activity, and separate status outputs indicate single or double faults, reducing the number of external discrete monitoring elements. Transmit and receive signals are referenced to analog ground, while digital status and control signals are referenced to digital ground. This separation simplifies interconnection with codecs, filters, and digital control logic. The hookswitch and fault outputs are compatible with TTL/CMOS, and the power-down input permits local shutdown. These interface features make the MC33121P suitable for integrated access, subscriber-line, PBX, voice codec, and central-office interface designs. Typical uses include a PBX line card, a central-office subscriber interface, a two-wire telephone-line interface, a voice codec interface, a hookswitch monitor, and a line-fault indication circuit. In each case, the IC provides the physical subscriber-line interface while external circuitry handles codec conversion, call control, supervision, and system-level power management. Because this legacy device is a through-hole 14-pin DIP, it is most practical for legacy designs, repair assemblies, and industrial or telecommunications equipment that can accommodate through-hole leaded components. Designers should preserve separate analog and digital grounding paths and connect the device to the selected codec, filter, and line-conditioning network exactly as shown in the manufacturer application material. Before production use, verify the unavailable operating voltage, temperature range, loop-current limits, external-component values, and absolute maximum ratings against the manufacturer datasheet. Those parameters are not supplied in the verified excerpts and therefore cannot be safely inferred. This page consolidates verified distributor pricing, package information, interface functions, comparison fields, and practical implementation cautions. It also distinguishes documented MC33121P characteristics from unverified alternatives, avoiding unsupported claims that a different SLIC is truly pin-to-pin compatible.
MC33199D - ISO 9141 Automotive K-Line Interface | NXP
The NXP MC33199D is an ISO 9141 automotive diagnostic serial interface circuit with one driver and one receiver, designed for a 4.5 V to 5.5 V supply and packaged in a 14-SOIC. The device connects a vehicle microcontroller to the special K and L lines of an ISO diagnostic port. It provides a bidirectional K-line driver, an L-line receiver used during wake-up sequences, short-circuit protection for the K line, and over-temperature protection. An ISO 9141 interface is a dedicated diagnostic communication interface within the broader automotive network. ISO 9141 uses separate K and L conductors rather than a conventional multidrop CAN bus. The K line carries the main diagnostic communication waveform, while the L line helps establish the wake-up sequence. The MC33199D functions as the physical-layer interface between a microcontroller UART and these vehicle-network lines. Key specifications include 1 driver and 1 receiver, a 4.5 V to 5.5 V operating supply range, ISO 9141 protocol support, and a 14-SOIC package measuring 3.90 mm wide. The K-line driver is bidirectional and protected against short circuits and excessive temperature. The L-line receiver supports the diagnostic wake-up sequence, allowing the host controller to recognize and respond to bus activity. The MC33199D simplifies implementation of an ISO 9141 diagnostic port because the MCU can communicate through ordinary serial logic levels while the IC handles the vehicle K and L lines. Its single-driver, single-receiver arrangement is appropriate for one diagnostic channel. Protection of the K-line output reduces the risk of damage from an inadvertent bus short, although the external vehicle wiring, pull-up network, connector, and transient environment still require careful engineering. Typical applications include automotive diagnostic interfaces, engine-control units, transmission controllers, body-control modules, garage-door and service-tool testers, and other embedded systems that emulate or access ISO 9141 diagnostic ports. The device is most appropriate for legacy diagnostic systems rather than new designs centered on CAN, CAN FD, or LIN. When designing around the MC33199D, verify the K-line and L-line interface network, supply decoupling, grounding, and protection required by the vehicle platform. The 5 V supply range excludes direct 3.3 V operation. Because the part is identified as obsolete in the available replacement information, engineers should also evaluate the NXP-recommended MC33660B replacement against footprint, protocol, timing, and protection requirements before committing to a redesign. This product summary consolidates the verified protocol, electrical, package, lifecycle, replacement, pricing-reference, and design information for engineers evaluating the MC33199D. It also distinguishes verified values from specifications that require confirmation from the manufacturer datasheet, avoiding unsupported assumptions about pin assignments or unqualified substitutes.
MC33290D - ISO 9141 K-Line Serial Link Interface | NXP
The NXP (formerly Freescale) MC33290D is an ISO 9141 K-Line serial link bus interface IC housed in an 8-pin SOIC package, designed for bidirectional half-duplex communication between a vehicle's on-board microcontroller and off-board diagnostic equipment. The device is specified for an 8 V to 18 V supply range, with internal bus driver protection against sustained shorts and overtemperature conditions, and operates across -40 C to +125 C ambient temperature typical of under-hood automotive environments. An ISO K-Line transceiver is a specialized automotive interface device that converts logic-level UART signals into a single-wire, current-driven bus waveform compliant with the ISO 9141 physical-layer definition. Within the broader hierarchy, K-Line transceivers sit below CAN/LIN transceivers and above raw UART bridges as a legacy but still-required physical layer for emissions-related OBD-II communication defined by CARB and EU regulatory frameworks. Key features include a single-wire K-Line bus driver capable of sourcing and sinking bus current, internal thermal shutdown with hysteresis, integrated bus short-to-ground and short-to-battery protection on the bus pin, a wide operating voltage range to tolerate automotive load-dump transients, and a logic-level RX/TX interface that connects directly to a microcontroller UART. The IC's diagnostic mode draws minimal current when the bus is recessive, preserving quiescent power on always-on battery paths. Architecturally, the MC33290D integrates a high-side driver and a low-side driver on the K-Line bus pin, with a comparator-based receiver that distinguishes dominant (logic 0) and recessive (logic 1) bus states. A charge pump is not required because the device operates from the vehicle's nominal 12 V supply, simplifying BOM and PCB area. Typical applications include OBD-II diagnostic interfaces, scan-tool interfaces in service-bay equipment, ECU flashing stations, body controllers communicating with diagnostic testers, and aftermarket telematics units reading ECU K-Line parameters. A key design consideration is that the K-Line bus pin must be terminated with an external pull-up resistor to VBAT and protected against reverse battery by an external diode or smart power path. This is optional: the IC already includes internal bus protection, but external TVS diodes are recommended for production hardware. This page consolidates distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet to accelerate part selection for automotive diagnostic designs.
MC33388D - Fault-Tolerant CAN Interface | NXP | Automotive
The NXP Semiconductors MC33388D is an automotive fault-tolerant CAN physical-layer interface with a 4.75 V to 5.25 V supply range, 5 mA supply current, and a 14-pin SOIC package. It supports differential CAN operation, ground shifts up to 1.5 V, dominant-state detection, receiver-mode control, failure detection, wake-up logic, slope control, and driver protection. These features position the device as a CAN physical-layer interface for automotive body-electronics multiplexing systems where ground-offset tolerance and fault resilience are important. A CAN physical-layer interface, also called a CAN transceiver, is the circuit that connects a CAN controller or host logic to a differential CAN bus. It belongs to the network-interface hierarchy: CAN transceiver to CAN physical layer to network interface IC to communication semiconductor. Unlike a controller-only device, the MC33388D handles bus-level signaling, driver protection, bus-state monitoring, and fault-oriented control functions required by demanding automotive environments. Verified product information identifies the MC33388D as an automotive fault-tolerant CAN interface and lists its 4.75 V to 5.25 V operating supply range, 5 mA supply current, and 14-SOIC package. Differential operation allows communication despite ground shifts up to 1.5 V and is intended to reduce radio-frequency-interference disturbances. The package also provides dedicated receiver-mode control, mux and failure-detection signals, standby and enable controls, wake-up inhibit, error indication, and slope-control functions. The device's architecture separates CAN bus-side signaling from logic-side control while adding automotive fault tolerance around the physical interface. Its 5 mA supply-current specification supports power-conscious body modules, while the 5 V supply range fits conventional automotive electronics. Ground-shift tolerance is particularly valuable when the transceiver and CAN controller reference different ground potentials or when common-mode voltage varies in body-network installations. Typical uses include automotive body-control modules, door and lighting controllers, seat and occupant-system electronics, climate-control nodes, sensing modules, and other distributed vehicle systems connected by a CAN bus. The fault-tolerant interface can also support industrial CAN equipment when its electrical ratings, automotive qualification status, availability, and lifecycle requirements have been verified for the target environment. Before layout, confirm the exact pin mapping and recommended external network in the manufacturer datasheet. Place the CAN bus-side network and protection components close to the transceiver pins, maintain a continuous ground reference where the architecture permits, and verify termination, common-mode voltage, bus-fault behavior, and timing in the final vehicle network. The available web results do not provide verified pricing, complete electrical limits, or a confirmed package drawing, so those details remain marked as data needed rather than inferred.
MC33390D - J1850 Class B Serial Transceiver | NXP
NXP Semiconductors MC33390D is a Class B serial transceiver designed for bi-directional, half-duplex data communications on an automotive SAE J1850 single-wire bus. The device operates from a 9 V to 16 V supply, supports data rates up to 10.4 kbps, and provides one driver and one receiver in an 8-SOIC package. Its primary function is to interface an on-board vehicle microcontroller directly with the J1850 Class B network. A serial transceiver is an interface IC that combines a transmitter and receiver so a host controller can exchange logic-level data with a physical bus. The MC33390D belongs to the automotive network-interface layer, where it translates between the controller interface and the electrical signaling required by the SAE J1850 Class B bus. This single-wire network arrangement reduces wiring complexity while supporting bidirectional communication over one physical conductor. The verified MC33390D specifications identify a 1/1 transceiver configuration, a 9 V to 16 V supply range, and operation at 10.4 kbps. These figures position the device for low-speed vehicle body and comfort systems rather than high-bandwidth automotive Ethernet. The 8-SOIC package is offered in tube packaging according to the available distributor specification, and the listed lead-free status states that the part contains lead. Typical automotive uses include body-control modules, instrument-cluster interfaces, door and lighting controllers, climate-control electronics, and other embedded vehicle systems that communicate through J1850 Class B. The MC33390D is most appropriate when the system already uses a J1850 network and requires a physical-layer transceiver between that bus and an on-board microcontroller. Designers must account for automotive transient immunity, grounding, bus termination, connector protection, and the voltage limits of the external MCU interface. The available verification data does not expose the complete pin-name mapping, absolute maximum ratings, ESD ratings, or recommended external-component values. Those details must be confirmed in the official NXP datasheet before schematic release or PCB sign-off. This page consolidates the verified manufacturer, distributor, and octopart records with package information, sourcing fields, application context, and a strict assessment of available drop-in alternatives. It distinguishes confirmed parameters from information requiring datasheet verification so procurement and engineering teams can make evidence-based decisions.
MC33399D - LIN Bus Half Transceiver | NXP | Automotive
The NXP Semiconductors MC33399D is an automotive LIN bus physical-layer transceiver packaged in an 8-pin SOIC with a 0.154-inch, 3.90 mm body width. The verified product listing identifies the device as a one-transceiver, half-duplex LINbus interface, placing it in the hierarchy of LIN transceivers, physical-layer interface ICs, interface ICs, and automotive semiconductor devices. A LIN bus is a low-cost, single-wire communication network commonly used between automotive electronic control units. The MC33399D provides the physical interface needed to connect a host controller or microcontroller to that network. Its half-duplex arrangement supports bidirectional communication over the LIN conductor while allowing the host-side logic to manage request and response sequencing. The NXP listing identifies the part as an automotive LIN physical-layer transceiver, and a verified technical result associates it with the LIN transceiver category and AEC-Q100 automotive qualification. The MC33399D is supplied in an 8-SOIC package according to DigiKey, while distributor information specifies a body width of 0.154 inches, or 3.90 mm. This surface-mount format supports compact automotive electronic modules while retaining a widely used package family. The product is intended for vehicle electronic control units, body electronics, sensor interfaces, door modules, lighting controllers, and other low-speed distributed automotive systems. The primary design consideration is that LIN transceivers operate in a physically different environment from conventional high-speed interfaces. The bus is slower than CAN or Ethernet, but its single-wire topology, long cable runs, automotive transients, ground offsets, and shared-network behavior require careful PCB implementation. The transceiver should be placed near the connector or protected interface path, with its external protection and bus-connection components selected using the manufacturer datasheet and the vehicle platform requirements. Because the supplied web evidence establishes the MC33399D identity, interface role, automotive qualification association, and 8-SOIC package, but does not provide complete electrical limits, timing values, pin names, or a verified numeric price, those details remain intentionally unasserted. Engineers should download the manufacturer datasheet and validate absolute maximum ratings, supply limits, logic thresholds, LIN bus parameters, termination, protection, and recommended external components before schematic or PCB release. This page combines verified distributor information, source-traceable specifications, procurement guidance, interface-design considerations, and clearly qualified replacement analysis. It distinguishes documented facts from unavailable parameters so that an MC33399D design decision can be made without turning unverified values into engineering assumptions.
MC33742DWR2 - SBC with HS-CAN Transceiver, SPI | NXP
The NXP MC33742DWR2 is a System Basis Chip (SBC-E-HS) that integrates a 1 Mbps CAN 2.0-compliant high-speed CAN transceiver, a fixed 5.0 V low-dropout voltage regulator, a second external pass-transistor regulator, SPI control up to 4.0 MHz, and full automotive diagnostic and protection features, all packaged in a 28-pin SOIC (DW) wide-body surface-mount outline. The internal LDO delivers 5.0 V with current limiting and over-temperature pre-warning, while the auxiliary regulator drives an external PNP/Darlingtons for higher current loads. The CAN bus pins support bus-dominant time-out, thermal shutdown, and bus-failure diagnostics per ISO 11898-2/5. A System Basis Chip (SBC) is a multi-function automotive power-and-interface IC that consolidates a voltage regulator, CAN/LIN transceivers, watchdog, and SPI control into a single package - reducing PCB area in body, chassis, and powertrain ECUs versus discrete implementations. Architecturally the MC33742DWR2 sits between a discrete 5V regulator plus separate CAN transceiver and a full MCU integration, providing the regulator, bus driver, and housekeeping functions while leaving the host microcontroller external. Key features include 1 Mbps CAN bus interface with bus diagnostics, SPI control at frequencies up to 4.0 MHz, a 5.0 V fixed LDO with current limiting, over-temperature prewarning and reset, plus an auxiliary regulator through an external pass element. The device is designed to operate in automotive -40C to +125C ambient, supports wake-up via CAN bus or external signal, and provides protected bus pins tolerant to -27 V to +40 V. Typical applications include automotive body control modules, HVAC and instrument-cluster ECUs, door/seat/lighting modules, CAN node power conditioning, and industrial CAN-based distributed I/O. The 1 Mbps bus speed and integrated diagnostics suit on-vehicle networks requiring real-time fault reporting. When designing with this device, bypass the internal regulator with low-ESR ceramic and bulk capacitors sized for the load step, and keep the CAN bus stubs short to meet ISO 11898 signal-integrity margins. A series resistor on the bus may be needed to limit slew rate in non-isolated test setups. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not consolidated on the manufacturer datasheet, including cross-brand options and AEO-optimized selection guidance for engineers.
MC33793D - Byte-Wide DSI Sensor Interface | NXP | 16-SOIC
The NXP Semiconductors MC33793D is a slave Distributed System Interface (DSI) sensor interface with a byte-wide parallel interface, optimized for connecting sensors such as accelerometers to an automotive or industrial controller. The device is offered in a 16-pin SOIC package and is supplied in a tube according to the verified distributor data. A Distributed System Interface, commonly abbreviated DSI, is a byte-wide serial bus intended for sensor communication. In the broader electronics hierarchy, a DSI sensor interface is an interface IC, a communications interface, and ultimately a semiconductor. MC33793D supports a sensor-oriented slave role and contains circuits that can power compatible sensors and digitize their analog output, reducing the amount of discrete conditioning circuitry required around a sensor. The verified product information identifies the MC33793D as a 16-SOIC device with logic inputs and logic outputs. Its byte-wide interface provides a structured pathway for transferring sensor data, while its sensor-specific integration can simplify implementations that would otherwise require separate analog-to-digital conversion, sensor excitation, and communication logic. The tube packaging also suits production processes that handle through-hole SOIC devices conventionally rather than reel-fed surface-mount assembly. The MC33793D family was originally associated with Motorola, Inc., and the part is currently listed by NXP USA Inc. through DigiKey. Historical search results also identify the MC33793 as a slave DSI device optimized for sensor interfacing. Because the supplied evidence does not expose detailed electrical timing, supply-voltage, sensor-excitation, conversion-resolution, or environmental limits, those values must be confirmed in the manufacturer datasheet before a new design is released. Typical uses include automotive accelerometer sensing, industrial motion and condition monitoring, and embedded systems that need a dedicated sensor-interface function close to the sensing element. In such designs, the interface helps consolidate sensor excitation and analog digitization while presenting a byte-oriented data path to the supervising electronics. Designers should verify the exact pin functions, recommended sensor interface, supply requirements, and signal timing from the MC33793 datasheet before layout release. PCB placement should preserve the manufacturer's guidance for sensor excitation and analog signal routing, while software and bus timing should be checked against the controller's DSI implementation. This page consolidates the verified package, interface, packaging, sourcing, and manufacturer-history information for MC33793D, adds practical application and design guidance, and clearly separates confirmed facts from electrical details that require datasheet verification.
MC33889BDWR2 - SBC with LS-FT CAN, 5.5-18V | NXP Semiconductors
The NXP Semiconductors MC33889BDWR2 is a System Basis Chip (SBC) integrating a low-speed fault-tolerant CAN transceiver, a 5V/3.3V linear voltage regulator, and a high-side/low-side driver in a single 28-pin SOIC package. It operates from a 5.5V to 18V supply, delivers up to 45 mA of internal supply current, and supports automotive bus nodes with hardware diagnostics. The BDWR2 suffix denotes the tape-and-reel packaging option of the B-grade device. A System Basis Chip (SBC) is a category of mixed-signal interface IC that consolidates the power supply, communication transceiver, and protection circuitry that traditionally surround an automotive microcontroller. In the broader hierarchy, the SBC sits below the microcontroller but above simple transceivers and regulators, acting as the gateway between the ECU power domain and the CAN/LIN bus. By collapsing discrete functions into one die, the SBC reduces board area, simplifies EMC design, and improves diagnostic coverage. Key features of the MC33889BDWR2 include a fault-tolerant CAN physical layer compliant with ISO 11898-3, integrated watchdog and reset circuitry for the host MCU, programmable wake-up sources, and a low quiescent current mode for battery-saving in parked vehicles. The integrated 5V regulator (VCC) supplies the host MCU, while an additional 3.3V or adjustable regulator can power sensors and companion ICs. Two high-side switches (typically 100 mA class) and a low-side driver support relay or solenoid loads. The device uses a bipolar-CMOS-DMOS process with on-chip thermal shutdown and short-circuit protection on every regulator output. Diagnostic flags for bus failure, regulator under-voltage, and overtemperature are exposed via the SPI interface to the host MCU, enabling ASIL-friendly functional safety architectures. Typical applications include automotive body control modules, instrument clusters, HVAC controllers, and gateway ECUs that need both a regulated MCU rail and a fault-tolerant CAN bus interface on the same node. The wide 5.5V-18V input range tolerates load-dump events on 12V automotive rails without external protection. When designing with this SBC, place the VCC bulk capacitor as close as possible to the VCC pin and observe the heatsinking requirement of the exposed pad variant if used. Always validate SPI register defaults against the latest NXP datasheet revision before firmware bring-up. This page synthesizes distributor pricing, drop-in NXP variants, and practical automotive design notes not found in the manufacturer datasheet alone.
MC33897D - Single-Wire CAN Transceiver | NXP Semiconductors
NXP Semiconductors MC33897D is a single-wire CAN transceiver, also known as an SWCAN physical-layer interface, designed for digital communication over a single-wire medium. The verified product information identifies a 1/1 transceiver configuration, 12 V supply rating, 83.33 Kbps data rate, 14-SOIC surface-mount package, and an operating temperature range of -40°C to +125°C. It is intended for automotive networks, industrial networks, farm equipment, marine systems, aircraft systems, and module-to-module communication. A single-wire CAN transceiver is a CAN bus physical-layer interface that uses one communication conductor rather than the separate transmit and receive conductors used by conventional CAN implementations. The MC33897D belongs to the broader CAN transceiver and interface IC category, providing the electrical interface between a digital controller and a single-wire CAN network. Its half-duplex operating concept supports communication over a shared network medium while reducing wiring complexity compared with dual-wire CAN. The key verified features of the MC33897D include its 1/1 driver and receiver arrangement, 12 V supply voltage, 83.33 Kbps data rate, and 14-SOIC package. The -40°C to +125°C operating range provides an extended temperature capability for demanding automotive, industrial, marine, and aircraft environments. The package is supplied in tube packaging according to the verified distributor information. MC33897D is a legacy NXP interface component associated with the Motorola 33897 family. The manufacturer datasheet identifies the product as a single-wire CAN transceiver providing the physical layer for digital communication using CSMA/CR operation over a single-wire medium. Because the device is listed as obsolete in the verified DigiKey search result, new production availability is not expected without a qualified sourcing route. The cross-reference data identifies MC33897CTEF as a parametric equivalent candidate. Typical uses include automotive body and module networks, agricultural machinery communications, industrial control networks, marine equipment, aircraft systems, and other installations requiring module-to-module communication over a reduced-wire-count bus. The 83.33 Kbps data rate and extended temperature range make the part relevant to legacy single-wire CAN designs, although system designers should confirm signal integrity, termination, grounding, and network topology against the manufacturer datasheet. When designing around MC33897D, pay particular attention to the single-wire bus topology and the 12 V supply requirement. The transceiver should be placed so that its connection to the one-wire network is physically short and properly controlled, with PCB layout and external components selected according to the datasheet. Obsolete status means sourcing continuity and counterfeit avoidance are important procurement considerations. This page combines verified manufacturer and distributor information, obsolete-lifecycle details, a documented parametric substitute, package and pinout status, and application-specific engineering guidance. It is intended to help engineers identify whether the legacy MC33897D remains electrically appropriate and how to verify a replacement before committing to a new design.
MC33972DWBR2 - 22-Ch Switch Detection MSDI, SPI, 32-SOIC | NXP
The NXP MC33972DWBR2 is a Multiple Switch Detection Interface (MSDI) with suppressed wake-up, monitoring up to 22 switch contacts and reporting status to an MCU over an SPI serial interface. Packaged in a 32-pin SOIC (0.295 inch / 7.50 mm body width) and supplied from 3.1 V to 5.25 V, the part integrates a 22-to-1 analog multiplexer and operates in Normal mode (programmable, full switch monitoring) or Sleep mode (low quiescent current) to support always-on automotive and industrial body electronics. A Multiple Switch Detection Interface is a type of switch-monitoring IC that scans many discrete contact closures (e.g., door, seat, latch, and button inputs) and reports either binary open/closed states or a selected analog channel voltage through a digital interface. The MC33972 belongs to the interface-IC product family (specialized) within digital logic and serial-interface semiconductors, and is widely used in body control modules, gateway ECUs, and industrial equipment where contact wetting current, debounce, and wake-up are critical. Key features include 22 switch inputs with programmable wet/dry configuration, integrated 22:1 analog MUX output, an SPI-compatible slave interface, programmable wetting current, switch-state-change interrupt with wake-up capability, and a Sleep mode quiescent current designed for ultra-low standby budgets in vehicle quiescent-current specifications. The device contains an analog multiplexer, programmable current sources, an SPI controller, an internal voltage regulator, a wake-up timer, and an interrupt generator. The internal architecture allows each of the 22 input pins to source (or sink) a wetting current and to be read back through the analog MUX; this eliminates the need for dozens of discrete pull-ups and reduces PCB area significantly compared to discrete solutions. Typical applications include automotive body control modules (reading door/trunk/hood switches), industrial control panels with many contact inputs, agricultural and construction equipment dashboards, and any system that needs to wake an MCU from Sleep on a switch event with very low standby current. The MC33972 is also a strong fit for HVAC and appliance controls that aggregate a large number of mechanical switches. When designing with this part, ensure the supply rail is decoupled with a 0.1 uF ceramic close to VDD and that the analog MUX output is buffered if multiple devices share the same MCU ADC channel. Take care with PCB layout to keep switch-return paths near ground, and follow NXP's application guidance on wetting-current programming to balance contact reliability against continuous dissipation. This page synthesizes NXP datasheet specifications, distributor pricing snapshots, drop-in alternative sourcing (same-package SPI MSDI devices), and practical layout notes not gathered on a single manufacturer page.
MC33975EK - 22-Channel Switch Detection SPI Interface | NXP
The NXP MC33975EK is a multiple switch detection interface with suppressed wake-up and 32 mA wetting current, housed in a 32-BSSOP (0.295 in / 7.50 mm width) exposed-pad package. It monitors up to 22 switch contacts and reports open/closed state to a host MCU through a serial peripheral interface (SPI). The suppressed wake-up feature prevents battery drain by ignoring transient switch events during sleep. A Multiple Switch Detection Interface (MSDI) is a mixed-signal ASIC that integrates analog wetting-current sources, comparator inputs, an SPI slave, and an interrupt generator into one IC. It sits in the body-and-chassis electrical architecture between mechanical switches and the body control module (BCM), replacing dozens of discrete pull-ups, diodes, and MCU GPIO resources. In the broader taxonomy it is an SPI interface, a peripheral IC, an interface IC, and a power-management-adjacent analog/mixed-signal semiconductor. Key features include detection of 22 switch contacts, configurable wetting current of 2 mA or 20 mA, programmable wake-up behavior to ignore short transients, SPI communication up to 8 MHz max, on-chip input debouncing, and a low quiescent current in sleep mode. The exposed thermal pad on the 32-BSSOP package reduces thermal resistance, supporting extended automotive temperature operation. Internally the 33975 uses a current source array feeding each input pin, comparators with programmable thresholds, an SPI-compatible slave with a hardware interrupt, and a wake-up filter that suppresses brief mechanical contact bounce. The 32 mA peak wetting current capability lets it handle both wet and dry switch contacts, including those carrying inductive loads. Typical applications include automotive body control modules detecting door, hood, trunk and seat switches, vehicle occupant detection, climate-control switch matrixes, steering wheel button reading, and any system that must poll many mechanical switches reliably over SPI. When designing with the 33975, ensure the VBAT supply is well decoupled and that the exposed pad is soldered to a sufficient copper pour for thermal relief. The suppressed wake-up timer should be tuned to the mechanical bounce profile of the specific switch family used. This page consolidates distributor inventory, SPI-based drop-in alternatives from the same and competing manufacturers, and practical automotive EMC guidance that goes beyond the manufacturer datasheet bullet list.