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Produits (39 000+)

MC1488PG - Quad RS-232 Line Driver | onsemi | PDIP-14
MC1488PG

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.

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MC1489AD - Quad EIA-232D Receiver IC | onsemi
MC1489AD

MC1489AD - Quad EIA-232D Receiver IC | onsemi

onsemi MC1489AD is a monolithic quad line receiver designed to connect data terminal equipment with data communications equipment conforming to EIA-232D. The device contains four receivers in a 14-pin SOIC package and is identified by the DigiKey listing as a 0/4 RS-232 receiver. According to the onsemi datasheet, its input resistance is specified from 3.0 kΩ to 7.0 kΩ. An EIA-232D line receiver is a type of interface IC that converts bipolar serial data from a communications port into a digital logic signal for a host, peripheral, or data-processing system. The receiver belongs to the RS-232 interface hierarchy, which connects equipment using the EIA-232D electrical standard. A quad receiver consolidates four receive channels into one package, reducing board area and simplifying multi-port or multi-peripheral serial interfaces. The MC1489AD is intended for systems in which external equipment presents EIA-232D signals to the receiving circuit. Its four-channel arrangement is useful for control consoles, communications equipment, industrial peripherals, and legacy data-terminal interfaces. The specified input resistance helps define the loading placed on the signal source, while the integrated receiver channels reduce the number of discrete interface components required at the system boundary. Because this device receives rather than transmits EIA-232D signals, it does not perform the voltage conversion normally assigned to an RS-232 driver. Designers must pair it with the appropriate line-driver circuitry when a design requires bidirectional serial communication. Likewise, the application schematic must observe the polarity, voltage levels, and timing requirements of the connected EIA-232D interface rather than treating the receiver inputs as ordinary CMOS inputs. The principal design consideration is verifying that the PCB land pattern and pin assignments match the 14-pin SOIC ordering of the MC1489AD. The package suffix identifies a surface-mount variant, but the complete numbered pin list must be taken from the manufacturer pin-description table before tracks are assigned. Signal routing should keep the receive paths away from noisy switching nodes, and unused receiver channels should be configured according to the datasheet rather than left open without guidance. Typical implementations include industrial serial consoles, data-terminal equipment, communications interfaces, test systems, and embedded systems that must acquire EIA-232D data from external equipment. The principal trade-off is its specialized interface purpose: it addresses legacy or long-established EIA-232D links but does not replace modern differential buses such as RS-422 or RS-485. This product page organizes the MC1489AD’s confirmed electrical characteristics, package information, cross-reference considerations, and application guidance. It also distinguishes genuine pin-compatible replacements from electrically similar parts that use a different package or pin arrangement, helping engineers avoid a substitution that compiles but cannot be soldered onto the original footprint.

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MC1489AM - Quad EIA-232D Receiver | onsemi | SOIC-14
MC1489AM

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.

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MC1489AN - Quad RS-232 Receiver, 5V, 14-PDIP | Texas Instruments
MC1489AN

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.

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MC1489AP - Quad RS-232 Receiver | STMicroelectronics
MC1489AP

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.

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MC1489D - Quad EIA-232D Line Receiver | onsemi | SOIC-14
MC1489D

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.

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MC1489DG - Quad EIA-232D Line Receiver | onsemi
MC1489DG

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.

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MC1489M - Quad EIA-232D Receiver | onsemi | SOIC-14
MC1489M

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.

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MC1489MG - Quad EIA-232D Receiver | onsemi | 14-SOIC
MC1489MG

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.

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MC1489N - Quad RS-232 Line Receiver | Texas Instruments
MC1489N

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.

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MC1489NE4 - Quad RS-232 Line Receiver, 5V | Texas Instruments
MC1489NE4

MC1489NE4 - Quad RS-232 Line Receiver, 5V | Texas Instruments

The Texas Instruments MC1489NE4 is a monolithic quadruple RS-232 line receiver designed to interface data terminal equipment (DTE) with data communications equipment (DCE) in conformance with EIA/TIA-232-F, housed in a 14-pin PDIP (N) package with a 5 V nominal supply and four independent receiver channels. A line receiver is an interface IC that converts large-swing serial-communication voltage levels (up to ±30 V in RS-232 systems) into safe TTL/CMOS logic levels for a microcontroller or UART. Within the signal-chain hierarchy, the MC1489NE4 belongs to the line receiver family of interface ICs, sitting between the physical RS-232 cable and the digital logic of a serial port, complementing a line driver such as the MC1488 or SN75188 on the transmit side. Key features include an input signal range of ±30 V, an input resistance of 3.0 kOhm to 7.0 kOhm, and a separate response-control (CONT) terminal for each receiver, per the Texas Instruments datasheet. The response-control pin lets a designer add an external resistor, or a resistor plus bias voltage, to shape input thresholds and noise immunity - a flexibility point that distinguishes the MC1489 family from fixed-threshold receivers. Technically, the device is fabricated as a low-power Schottky bipolar monolithic circuit. Each receiver senses a differential-mode-comparable single-ended RS-232 input and produces a logic-level output with defined high and low thresholds. Power dissipation ratings in the datasheet list 950 mW at 25 C for the D package and 1150 mW for the N package, with derating factors above 25 C, and a commercial temperature grade up to 70 C as listed by distributors for the MC1489NE4 suffix. Typical applications include legacy RS-232 serial ports on industrial equipment, programmable logic controller (PLC) communication cards, point-of-sale terminals, modem interfaces, and instrumentation front ends that must still accept ±12 V or ±15 V signaling from older field devices. A key design consideration is threshold shaping via the CONT pins: adding a positive bias raises the input threshold and improves noise immunity in electrically harsh environments, while leaving the pin open restores the default response. Also verify the 5 V rail tolerance, since the device is specified for a nominal VCC of 5 V with a distributor-listed maximum around 5.5 V. This page adds value beyond the raw datasheet: it synthesizes drop-in alternative comparisons (SN75189AN, MC1489P), application guidance, and design notes for engineers maintaining RS-232 legacy systems.

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MC1489P - Quad RS-232 Line Receiver | STMicroelectronics
MC1489P

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.

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MC1489PG - Quad EIA-232D Receiver | onsemi | 14-PDIP
MC1489PG

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.

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MC14C88BP - Quad Low-Power RS-232 Driver | onsemi
MC14C88BP

MC14C88BP - Quad Low-Power RS-232 Driver | onsemi

The onsemi MC14C88BP is a low-power monolithic quad RS-232 line driver with four independent outputs, BiMOS operation, TTL- and CMOS-compatible inputs, and internally controlled output slew rate. It conforms to the EIA-232-D, EIA-562, and CCITT V.28 specifications, operates below 5.0 mW, and has quiescent current below 160 uA. The device is supplied in the BP 14-pin plastic DIP package for through-hole PCB installation. A quad RS-232 line driver converts TTL or CMOS logic signals into differential RS-232-compatible levels. In the interface hierarchy, an RS-232 driver sits between digital logic and a communication transceiver, with the complete transceiver combining drivers, receivers, and signal conditioning. This device is useful where one controller must connect to four separate data, control, or handshake lines without using four single-channel driver packages. The BiMOS process combines bipolar output drive with CMOS-compatible input circuitry. This supports low quiescent current while maintaining the voltage swing and transition behavior required by RS-232 interfaces. Inputs accept both TTL and CMOS levels with minimal loading, while internal slew-rate control limits unwanted high-frequency energy on the driven lines. These characteristics make the MC14C88BP appropriate for low-power industrial control, instrumentation, and embedded communication equipment. Each channel provides one driver output, allowing four logic signals to be translated independently. Internal slew-rate control helps reduce edge-rate problems that can otherwise produce ringing, crosstalk, or electromagnetic interference on long cables. The device's low-power design is particularly valuable in battery-operated or power-constrained systems where every milliwatt of static consumption affects operating time or thermal design. Typical uses include RS-232 port expansion, industrial controller interfaces, test and measurement equipment, and embedded systems that require four RS-232 outputs. The part can also support point-to-point links when several channels remain unused. In each case, system designers should confirm output levels, grounding, cable length, and interface requirements against the original equipment specification. For reliable PCB implementation, place the MC14C88BP in the same orientation as the reference design and observe the datasheet's supply and ground connections. Decoupling capacitors should be placed close to the power pins, while unused driver inputs must be tied to a defined logic level. Because RS-232 is unbalanced, grounding and cable routing remain important even though the driver itself internally controls output slew rate. This product record combines the MC14C88BP's functional characteristics with application guidance, engineering cautions, and verified drop-in references. It also distinguishes explicitly identified compatible parts from options that are merely similar, helping engineers assess PCB reuse, supply planning, and signal-interface integrity before making a replacement decision.

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MC1648M - Voltage-Controlled Oscillator | Motorola
MC1648M

MC1648M - Voltage-Controlled Oscillator | Motorola

The Motorola MC1648M is a voltage-controlled oscillator designed for frequency synthesis, modulation, and signal-generation applications. According to the available Motorola MC1648 documentation, the device requires an external parallel tank circuit consisting of an inductor and capacitor; maximum performance is obtained with QL greater than or equal to 100 at the operating frequency. A varactor diode may be placed in the tank circuit to provide a voltage-variable input for voltage-controlled oscillator operation. A voltage-controlled oscillator, or VCO, generates an output signal whose frequency varies with an applied control voltage. The MC1648 belongs to the broader clock and timing IC family, where it provides a tunable oscillator rather than a fixed-frequency clock. Its external tank circuit allows the designer to select inductance and capacitance for the target operating range, while the control voltage provides fine frequency adjustment. This architecture is useful in FM transmitters, frequency synthesizers, clock-generation circuits, and frequency-discriminator systems. The main verified technical characteristics are its external parallel LC-tank requirement and the recommended tank quality factor of QL at least 100 for maximum performance. The device also supports voltage-variable operation when a varactor diode is incorporated into the tank circuit. The supplied search results identify MC1648M as a Motorola voltage-controlled oscillator and associate it with a DIP-style MC1648 package family, but the detailed electrical ratings, frequency limits, supply voltage, output characteristics, pin names, and package dimensions were not included in the verified dataset. For design implementation, the external tank components should be placed close to the oscillator pins and selected for the intended frequency range. Component tolerance, parasitic capacitance, and inductor Q can shift the operating frequency. The control-voltage range and permitted control-voltage slew rate should be verified in the manufacturer datasheet before relying on the part for precision frequency control. Typical uses include FM radio modulation, tone generation, frequency conversion, and tunable clock sources. The MC1648M is most appropriate when an external LC network and application-specific frequency calibration are acceptable. Modern designs may instead choose a higher-integration oscillator when smaller size, digital calibration, or a specified phase-noise performance is required. This page combines the verified Motorola MC1648 tank-circuit requirements, distributor availability information, pricing context, and practical selection guidance. The verified distributor listing shows MC1648M in stock at LCSC with a starting price of $1.0043. Pricing and inventory should be checked with the authorized supplier before purchase, especially because legacy semiconductor availability can vary by package, region, and production status.

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MC3302D - Quad 3-36 V Comparator | onsemi | Analog IC
MC3302D

MC3302D - Quad 3-36 V Comparator | onsemi | Analog IC

onsemi MC3302D is a quad voltage comparator containing four independent precision comparator channels, a 3 V to 36 V single-supply operating range, and an offset voltage specification as low as 2.0 mV maximum per channel. The component is offered in a 14-lead small-outline package for level-detection, low-level-sensing, memory, consumer, automotive, and industrial circuits. A voltage comparator is an analog integrated circuit that compares two input voltages and changes its output state when the difference between them changes sign. The MC3302D belongs to the comparator hierarchy within analog and amplifier ICs, where precise threshold comparison is used to convert an analog condition into a digital decision for control logic, protection circuits, sensing systems, and memory interfaces. Each of the four MC3302D channels is independent, allowing one package to implement four separate threshold decisions. The verified source describes the series as a precision single-supply quad comparator with offset voltage down to 2.0 mV maximum. It also identifies 25 nA typical input bias current and plus or minus 5 nA typical input offset current for the related MC3302DR2G description, useful characteristics when the design must limit input loading or offset-related switching errors. The device supports operation from a 3 V to 36 V supply and can also operate from dual supplies when the supply constraints are satisfied. The cited comparison information states that dual-supply operation is possible when the difference between supplies remains between 2 V and 28 V and VCC is at least 1.5 V more positive than the negative supply. These details make the comparator suitable for both compact low-voltage systems and wider industrial rails. Typical uses include level detection, low-level sensing, memory applications, and consumer, automotive, or industrial electronic equipment. In each case, the four independent channels can monitor separate thresholds without requiring four separate comparator packages, reducing component count while preserving independent decision paths. Designers should verify input common-mode limits, output configuration, propagation delay, input overvoltage behavior, and input/output pin functions against the manufacturer datasheet before finalizing a board. The verified data does not provide a complete pin table or all timing limits, so those parameters should not be inferred from the broader LM139-family description. This page consolidates the verified onsemi product information, distributor pricing and availability, cross-reference candidates, and practical application guidance. It distinguishes confirmed ratings from parameters requiring direct datasheet confirmation, helping engineers evaluate MC3302D without relying on incomplete distributor summaries.

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MC3302DG - 3-36V Quad Comparator | onsemi | 14-SOIC
MC3302DG

MC3302DG - 3-36V Quad Comparator | onsemi | 14-SOIC

onsemi MC3302DG is a single-supply quad comparator IC with four independent comparison channels, a 3 V to 36 V operating range and a 14-SOIC surface-mount package. It is designed for general-purpose level detection, low-level sensing and memory applications, with CMOS, open-collector and TTL-compatible output characteristics. A comparator is an analog integrated circuit that compares an input voltage against a reference voltage and produces a digital logic result. The MC3302DG belongs to the comparator hierarchy within analog mixed-signal ICs, where its four channels provide compact threshold monitoring, signal conditioning and system-level decision logic. Compared with a general-purpose operational amplifier used as a comparator, this device is purpose-built for logic-level output behavior. Key features include four comparators in one package, single-supply operation from 3 V to 36 V, typical low input bias current of 25 nA, typical input offset current of plus or minus 5 nA, and open-collector outputs suitable for CMOS and TTL-compatible interfacing. The commercial temperature range is -40 C to +85 C, making the part suitable for industrial and commercial equipment when its electrical ratings are respected. The low input bias current helps reduce errors in high-impedance sensing circuits, while the low input offset current supports sensing nodes where small current differences determine the comparison result. Its open-collector output architecture gives the designer control over pull-up voltage and can support wired logic, but each output requires an appropriate pull-up arrangement to operate as a conventional logic signal. Typical applications include battery threshold detection, power-supply monitoring, memory-cell sensing, industrial control interfaces, sensor conditioning and general digital threshold logic. The 14-SOIC package offers enough pin spacing for hand assembly and inspection while supporting compact PCB layouts in industrial control, instrumentation and embedded systems. When designing around the MC3302DG, account for the open-collector output, choose suitable pull-up resistors, maintain the input common-mode range across temperature, and verify output-state timing in the complete system. Because several channels share a package, power-supply noise and ground-return paths can affect more than one comparator, so careful decoupling and routing remain important. This product page combines the manufacturer part identity, verified distributor data, package information, application guidance, design notes and documented drop-in alternatives to support faster component selection and PCB-level replacement planning.

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MC3302P - Quad Single-Supply Comparator | onsemi
MC3302P

MC3302P - Quad Single-Supply Comparator | onsemi

The onsemi MC3302P is a quad single-supply comparator with a 14-pin PDIP package. It provides four independent comparator channels for level detection, low-level sensing, memory applications, and other consumer, automotive, and industrial electronics systems. The verified product data identifies a typical input bias current of 25 nA and a typical input offset current of ±5.0 nA, while the specified comparison capability covers ±15 V and 30 V operation. Its through-hole PDIP-14 construction supports legacy industrial and automotive circuit boards that were designed around a quad comparator rather than a newer surface-mount package. A comparator is an analog integrated circuit that compares two input voltages and produces a logic-level output indicating which input is higher. The MC3302P belongs to the comparator hierarchy, which also includes voltage comparators and differential amplifiers used in control and signal-conditioning systems. As a single-supply device, it is intended for systems where the comparator must operate from one supply rail while detecting small voltage differences within that rail. The MC3302P's four channels provide practical space savings compared with four discrete comparators. Its typical 25 nA input bias current minimizes loading on high-impedance sensing nodes, while the typical ±5.0 nA input offset current supports accurate threshold decisions near the reference voltage. The device is suited to console, automotive, and industrial applications where level detection and low-level sensing must be implemented with a familiar 14-pin through-hole footprint. Each channel compares an inverting and a non-inverting input and provides an open-collector output, allowing the outputs to be pulled up as required by the host logic and to support wired logic when several outputs are combined. The open-collector architecture provides design flexibility but requires an external pull-up resistor. The output transistor can sink current when the comparator condition is met, while the pull-up establishes the inactive high voltage. Typical uses include battery threshold detection, sensor signal conditioning, window or level comparison, memory-control interfaces, and industrial control modules. Because this is a legacy-style PDIP device, it is especially relevant to maintenance of existing equipment rather than new space-constrained designs. Designers should confirm the exact pinout and output truth table against the manufacturer documentation before modifying an existing board. The principal design consideration is supply bypassing. Place the required decoupling capacitor close to the device supply pins and return each comparator input directly to its pin rather than routing it through shared analog traces. Account for input offset and bias currents when setting very small thresholds, and use a pull-up resistor compatible with the required output rise time and available sink current. This product record combines verified manufacturer and distributor information with package, application, design, and replacement guidance. It also distinguishes exact technical data from values that require confirmation, helping engineers source MC3302P parts without treating unsupported compatibility or price claims as verified facts.

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MC3302PG - 4-Channel 3-36V Comparator | onsemi
MC3302PG

MC3302PG - 4-Channel 3-36V Comparator | onsemi

The onsemi MC3302PG is a four-channel, general-purpose comparator designed for single-supply operation across a 3 V to 36 V input range. It provides CMOS and TTL-compatible open-collector outputs, a 1 mA supply current specification, and a response time of 1.3 microseconds. The device is packaged in a 14-pin PDIP package for through-hole industrial, consumer, and automotive electronics assemblies. A comparator is an analog integrated circuit that compares two input voltages and produces a logic-level indication of their relationship. The MC3302PG belongs to the comparator hierarchy within analog ICs and interface ICs. Its four independent channels allow a single package to perform multiple threshold, level-detection, low-level-sensing, or memory-interface functions while operating from one supply rail. The primary electrical features are the wide 3 V to 36 V operating range, four general-purpose comparator channels, 1.3 microsecond response time, and 1 mA supply current. CMOS and TTL output compatibility allows the open-collector outputs to interface with a broad range of digital logic. The 14-pin PDIP package also supports conventional through-hole assembly and hand prototyping without requiring a fine-pitch surface-mount footprint. Each comparator section is intended to operate from the same single supply, making the IC suitable for systems where a positive supply rail is available but split bipolar rails are not. Open-collector outputs provide a flexible output architecture, while the common-device package simplifies inventory and reduces the number of discrete comparator components required on a board. The 1.3 microsecond response time is appropriate for threshold monitoring and control functions that do not require sub-microsecond timing. Typical uses include level detection, low-level sensing, memory applications, industrial control inputs, consumer equipment, automotive signal interfaces, and digital threshold crossings. The four-channel arrangement is particularly useful when several sensed voltages must be compared against independent references or when redundant comparator decisions are needed within one package. Designers should account for the open-collector output configuration, including pull-up requirements and pull-up resistor selection. Input common-mode range, output saturation behavior, supply-current variation, and input offset must be checked against the manufacturer datasheet for the exact operating condition. Input leads should be routed away from switching nodes and noisy return paths to prevent false comparator transitions. This product page combines the core MC3302PG electrical characteristics, same-footprint replacement options, application guidance, and practical design notes. It is intended to help engineers identify the correct package, confirm logic compatibility, and plan PCB implementation before requesting a quotation for production sourcing.

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MC3303D - Quad 30V 1MHz Op Amp | Texas Instruments
MC3303D

MC3303D - Quad 30V 1MHz Op Amp | Texas Instruments

The Texas Instruments MC3303D is a quad general-purpose operational amplifier designed for single-supply operation, with a 30 V maximum supply rating, approximately 1 MHz unity-gain bandwidth, and a 14-pin SOIC package. The four amplifiers share a common package while providing separate differential input and output connections for independent analog signal conditioning. An operational amplifier is a voltage-feedback amplifier used to amplify, buffer, filter, compare, or reshape analog signals. Quad operational amplifiers combine four amplifier channels in one package, reducing board area and simplifying designs that need multiple analog functions. The MC3303D belongs to the broader hierarchy of operational amplifier, analog amplifier, analog IC, and semiconductor. Key verified features include four amplifier circuits, single-ended circuit configuration, a 30 V supply rating for the Texas Instruments MC3303D, and a unity-gain bandwidth of 1 MHz. The onsemi MC3303D listing additionally describes a voltage-feedback architecture, 0.6 V/µs slew rate, nominal 14 V supply, and an operating-temperature range from -40 °C to 85 °C. Because MC3303D is used by more than one manufacturer, engineers should confirm the manufacturer-specific orderable datasheet before release. The MC3303D combines four high-voltage-capable amplifiers in a 14-terminal SOIC-14 package. Its approximately 1 MHz bandwidth is suitable for general-purpose signal processing, including audio-frequency stages, control loops, sensor interfaces, and active filtering. The available verified data does not state input offset voltage, input bias current, noise density, common-mode input range, output swing, or short-circuit current for the Texas Instruments version. Typical uses include four-channel sensor conditioning, low-frequency active filters, instrumentation stages, audio preamplification, comparator-style threshold circuits, and general analog buffers. Because four independent channels are integrated, a design can also use the amplifiers for mixed functions such as gain, filtering, level shifting, and output buffering without using four separate packages. Designers should verify input common-mode range, output swing, input offset, bias current, noise, stability, and compensation requirements against the exact manufacturer datasheet. The verified web results identify different electrical details for the Texas Instruments, onsemi, and STMicroelectronics versions sharing the MC3303D suffix, so package compatibility alone does not prove specification compatibility. This page combines verified manufacturer and distributor information with practical procurement guidance, explicitly identifies unavailable electrical parameters, and distinguishes same-package drop-in candidates from broader functional equivalents. It is intended to support engineering selection without treating devices with identical suffixes from different manufacturers as automatically interchangeable.

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MC3303DG - 4-Channel 1 MHz Op Amp | onsemi | 14-SOIC
MC3303DG

MC3303DG - 4-Channel 1 MHz Op Amp | onsemi | 14-SOIC

The onsemi MC3303DG is a four-channel general-purpose operational amplifier with true differential inputs, 1 MHz gain-bandwidth product, and 0.6 V/us slew rate, housed in a 14-pin SOIC package. Designed for single-supply operation from 3 V to 36 V, the device also supports split-supply operation, making it suitable for industrial control, instrumentation, sensor conditioning, and general analog signal-processing systems. Each amplifier includes internal frequency compensation, low input bias current, and short-circuit protection, allowing stable operation without external compensation networks in typical closed-loop configurations. An operational amplifier is an analog integrated circuit that amplifies the voltage difference between its inverting and non-inverting inputs. In the product taxonomy, the MC3303DG belongs to the operational-amplifier and instrumentation-amplifier hierarchy, then to the broader amplifier IC and semiconductor categories. Its internally compensated architecture simplifies design by fixing the gain-bandwidth relationship while preserving a practical combination of supply flexibility, low power consumption, and general-purpose functionality. The principal electrical features include four independent amplifiers, 1 MHz gain-bandwidth product, 0.6 V/us slew rate, and 8 mV input offset voltage as listed for the industrial-temperature version. The device operates from 3 V to 36 V under a single supply, while dual-supply operation remains possible when the total supply span is adequate. A class AB output stage supports practical drive into typical feedback networks, and true differential inputs help reject common-mode signals when both inputs are biased within the common-mode range. The MC3303 architecture is intended as a cost-conscious alternative to the uA741-class quad amplifier while adding advantages for modern single-supply systems. Internal frequency compensation removes the need for a dominant-pole compensation capacitor in most closed-loop applications. Designers must still account for output swing, input common-mode range, bias current, noise, stability, and supply bypassing when using the amplifier in precision or high-frequency circuits. Typical applications include industrial control loops, transducer and sensor signal conditioning, audio preamplification, analog measurement front ends, power-supply feedback networks, and low-frequency communications equipment. Four amplifiers in one package can reduce board area in designs requiring multiple independent analog channels, although common supply routing and decoupling remain critical. The most important design practice is to place input, output, and bypass connections for short, low-impedance paths while keeping sensitive input traces away from power outputs and switching nodes. Verify the exact input and output voltage limits, bias-current behavior, load capability, and noise specifications against the manufacturer datasheet before finalizing a precision application. This page consolidates verified distributor information, package-specific alternatives, technical comparisons, and practical design guidance for engineers evaluating the MC3303DG. It emphasizes what is confirmed from supplied sources and explicitly marks unavailable electrical details rather than estimating them, supporting more reliable procurement and design decisions.

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MC3303DR - Quad 30V 1MHz Operational Amplifier | Texas Instruments
MC3303DR

MC3303DR - Quad 30V 1MHz Operational Amplifier | Texas Instruments

The Texas Instruments MC3303DR is a quad, 30-V, 1-MHz operational amplifier packaged in a 14-pin SOIC (D). The device combines four amplifiers on one die, supports single-supply operation from 3 V to 36 V, and includes a class AB output stage, true differential inputs, internal frequency compensation, and short-circuit protection. Its four-amplifier arrangement reduces board area in instrumentation, buffering, and general-purpose analog signal-processing circuits. An operational amplifier, or op amp, is a high-gain differential amplifier that uses feedback to control gain, impedance, bandwidth, and output behavior. The MC3303 belongs to the general-purpose amplifier hierarchy: operational amplifier, voltage-feedback amplifier, analog amplifier, and integrated circuit. Its low-power quad configuration is intended for cost-sensitive designs requiring several independent amplifier channels on a compact PCB footprint. The primary performance characteristics include a 1-MHz gain-bandwidth product, a 30-V maximum operating rating in the product designation, and operation from a 3-V to 36-V single supply. Split-supply operation is also possible when the total supply range is respected. A class AB output stage supports linear operation, while true differential inputs provide the conventional non-inverting and inverting input arrangement expected by general-purpose amplifier designs. Internal frequency compensation removes the need for an external dominant compensation capacitor in ordinary closed-loop applications. Short-circuit protection improves robustness when an output is driven into a low-impedance load. These features simplify implementation, but the amplifier still requires careful common-mode, output-swing, stability, and supply-decoupling analysis for each specific circuit. Typical uses include four-channel sensor conditioning, instrumentation buffering, low-frequency active filtering, general signal amplification, and industrial control interfaces. The MC3303DR is particularly appropriate when a quad low-power package, wide single-supply range, and moderate 1-MHz bandwidth are more important than rail-to-rail input or output operation. During PCB design, place input, output, and supply bypass components close to their associated pins. Keep sensitive input traces away from switching nodes and high-current return paths. Verify output-voltage headroom, common-mode range, load stability, and power dissipation across temperature before treating the nominal supply limits as usable design limits. This product data combines manufacturer information, package and lifecycle details, practical design guidance, and same-footprint replacement options. It also identifies the electrical checks engineers should perform before replacing the MC3303DR in an existing instrumentation or control design.

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MC3303DT - 1MHz Low-Power Quad Op Amp | STMicroelectronics
MC3303DT

MC3303DT - 1MHz Low-Power Quad Op Amp | STMicroelectronics

STMicroelectronics MC3303DT is a low-power, quad bipolar operational amplifier featuring four amplifiers, true differential inputs, internally compensated operation, and a 1 MHz gain-bandwidth product. The device operates from single +3 V to +36 V supplies or from dual ±18 V supplies and is packaged in a 14-pin SOIC. Each amplifier is designed for general-purpose signal conditioning using its Class AB output stage and short-circuit-protected outputs. An operational amplifier is a voltage-gain element that compares its inverting and non-inverting inputs and drives its output toward a voltage representing the difference between them. The quad configuration belongs to the operational-amplifier family within analog integrated circuits and amplifier ICs. MC3303DT provides four independent amplifiers in one package, reducing board area compared with four single or dual amplifier packages when a system requires four similar signal-processing channels. The principal features include a 1 MHz gain-bandwidth product, operation from 3 V to 36 V, low input bias current of 500 nA maximum, internal frequency compensation, and short-circuit-protected outputs. Its Class AB output stage is intended to provide a practical compromise between output drive capability and power dissipation compared with a pure Class A stage. The low-power operating point makes the device suitable for industrial control, instrumentation, sensor interfaces, and general analog signal-conditioning systems. MC3303DT differs from the closely related UA741-family architecture through its improved suitability for single-supply operation. It accepts a positive supply as high as 36 V or dual supplies of ±18 V, allowing operation from industrial 24 V rails when the total supply and input/output signal limits are observed. Internally compensated amplifiers simplify closed-loop gain selections when unity-gain stability is appropriate for the selected circuit and load. Typical uses include four-channel sensor amplification, differential input conditioning, active filtering, comparator-style threshold functions, and general instrumentation. The four amplifiers may also process separate channels or be combined in wider-bandwidth or higher-gain configurations where the resulting feedback network remains stable. Designers should account for input common-mode range, output swing, noise, and load capability at their intended supply voltage. A key design consideration is power: each amplifier contributes to total quiescent current, so four channels require more supply current than one or two channels. Input and output stability should be verified with the intended source impedance, load, supply decoupling, and feedback network. Input and output pin functions are published in the manufacturer datasheet, which should be checked against the final 14-pin PCB footprint. This page combines verified distributor data, manufacturer-document references, application guidance, package details, and same-footprint replacement considerations. It also identifies where current sourcing information remains unavailable so engineers can distinguish documented facts from data requiring confirmation before production release.

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MC3303N - Quad 30V 1MHz Op Amp | Texas Instruments
MC3303N

MC3303N - Quad 30V 1MHz Op Amp | Texas Instruments

The Texas Instruments MC3303N is a quad, low-power bipolar operational amplifier specified for a 30 V maximum supply and 1 MHz unity-gain bandwidth, housed in a 14-pin PDIP package. It provides four amplifiers in one package for general-purpose signal conditioning, transducer interfaces, analog summing, filtering, and feedback-control circuits. An operational amplifier is a voltage-amplified differential-input device whose external feedback network determines its behavior. MC3303 belongs to the operational-amplifier hierarchy: quad low-power op amp, bipolar linear amplifier, analog signal-conditioning IC, and semiconductor. Four independent amplifiers in one 14-pin package reduce board area compared with four separate single or dual amplifier packages, although users must preserve adequate spacing and decoupling for stable low-noise operation. Verified manufacturer information identifies the MC3303N as a standard general-purpose four-circuit amplifier in a 14-pin PDIP package, with a 30 V supply rating and 1 MHz gain-bandwidth product. The family is intended for single-supply or split-supply operation when the electrical limits specified by the manufacturer are met. Because the target uses a through-hole PDIP package, it also supports prototype repair and conventional leaded-board assembly rather than requiring a fine-pitch SMT footprint. The integrated amplifier count makes the device useful when a board needs multiple similar signal paths. Typical uses include four sensor channels, four analog-control loops, dual-channel buffering with spare amplifier capacity, or small active-filter sections. Designers should check common-mode range, output swing, input bias behavior, supply current, noise, slew rate, stability, and temperature limits against the manufacturer datasheet before fixing the operating conditions. The MC3303N should be placed near the supported decoupling network, with power and ground return paths arranged to minimize resistance and switching noise. Input and feedback components should be positioned to reduce parasitic capacitance at the high-frequency nodes. Do not infer exact bias-current, noise, slew-rate, common-mode, or temperature values from the search summaries; those parameters require the official manufacturer datasheet before release to production. This page combines verified product identity, source links, package information, application guidance, and explicitly marked data gaps. The comparison section is limited to candidates that the provided evidence supports as MC3303N equivalents; any claimed drop-in substitution must still be checked against pin assignment, electrical limits, supply requirements, and the intended operating conditions.

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