Circuitos Integrados

MC1488D

MC1488D - Quad EIA-232D Driver | onsemi | RS-232 Interface

The onsemi MC1488D is a monolithic four-channel EIA-232D line driver with a 14-pin SOIC package. It provides four current-limited differential outputs intended to interface data terminal equipment with data communications equipment, with typical output current limited to ±10 mA and a minimum power-off source impedance of 300 ohms. An EIA-232D line driver is a type of RS-232 interface driver that converts logic-level signals into the voltage-domain signals used by RS-232 communications equipment. Within the broader hierarchy, it is a line driver and interface IC within communications and power-management signal conditioning. Its four channels allow one package to support several unidirectional data paths when the system already provides the required receiver and supply circuitry. Key features include four independent driver channels, typical current-limited output of ±10 mA, and a minimum power-off source impedance of 300 ohms. The current limiting helps control output current when a receiver or connected circuit imposes an abnormal load. The MC1488D also provides simple slew-rate control, an important characteristic for reducing unwanted transitions on slow RS-232 links. Technically, the device is designed around the EIA-232D interface requirements identified in the onsemi datasheet. Because MC1488D contains drivers rather than receivers, it cannot replace a complete RS-232 transceiver without external receiver circuitry. In a typical interface, logic signals enter the driver inputs and leave through four EIA-232D output channels. The receiver and any required level translation are separate functions. Typical uses include legacy RS-232 ports, data terminal equipment, data communications equipment, industrial control interfaces, and embedded systems that retain an EIA-232D connection. The MC1488D is also useful as the transmit-side element in a multi-channel interface where a companion receiver IC is already present. Designers should verify the supported supply voltage, input thresholds, output levels, timing, and absolute maximum ratings directly against the manufacturer datasheet before implementation. PCB layout should preserve short output paths, provide an appropriate ground reference, and avoid placing sensitive analog signals beside the driver outputs. This page combines verified manufacturer and distributor information, source-backed drop-in candidates, interface-selection guidance, and practical PCB considerations to provide engineering context beyond a basic MC1488D catalog listing.

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MC1488DG

MC1488DG - Quad EIA-232D Driver | onsemi | RS-232 Interface

onsemi MC1488DG is a monolithic quad line driver designed to interface data terminal equipment with data communications equipment using the EIA-232D standard. The device provides four driver channels, operates from a 5 V supply, and uses a 14-pin SOIC package. Its typical output current is ±10 mA per channel, with current limiting built into the outputs. The MC1488DG is intended for RS-232 transmitter functions rather than receiver functions, so it must be paired with a suitable quad receiver when full bidirectional communication is required. An EIA-232D line driver is a type of interface transceiver component that converts logic-level signals into RS-232 voltage levels for transmission between data terminal equipment and data communications equipment. In the broader hierarchy, MC1488DG belongs to the interface IC category, specifically the RS-232 driver family. Its quad-channel architecture reduces the component count in systems requiring several serial data outputs while preserving the signal and power connection conventions established for EIA-232D equipment. The principal features of MC1488DG include four independent driver outputs, integrated output current limiting, and a typical output current capability of ±10 mA. The driver is designed for conformance with EIA-232D interface requirements, and its monolithic construction places the driver functions in one 14-pin SOIC package. The design supports equipment requiring multiple RS-232 transmit channels, including computer peripherals, industrial data links, test equipment, and legacy communications equipment. Technically, the MC1488 belongs to the family of bipolar RS-232 line drivers that use positive and negative supply rails to develop the bipolar voltage levels required by the interface standard. The MC1488 data also identifies SN55188 and SN75188 as related monolithic quadruple line drivers. Because MC1488DG is a driver-only device, engineers should check signal levels, supply requirements, output polarity, and protection needs against the original system interface before using it in a redesigned board. Typical applications include industrial serial-port controllers, laboratory instrumentation, point-of-sale terminals, data acquisition equipment, and embedded systems that retain an RS-232 output interface. In a multi-channel design, each logic input can drive a corresponding RS-232 output, while a separate receiver IC handles incoming signals. This separation is important because the MC1488 provides four transmit channels but no integrated receive channels. A key design consideration is to preserve the original board footprint and verify every pin assignment before substitution. The 14-pin SOIC package is suitable for conventional surface-mount assembly, but RS-232 cables connect to externally exposed connector pins rather than directly to the IC. External protection, grounding, connector geometry, and cable-routing decisions remain necessary to achieve reliable system-level communications. This page combines the verified manufacturer and distributor references for MC1488DG with package information, interface intent, sourcing links, and identified pin-compatible alternatives. It also distinguishes the driver-only MC1488DG from complete RS-232 transceiver functions, helping engineers select the correct replacement without confusing interface direction or package compatibility.

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MC1488M

MC1488M - Quad EIA-232D Driver, SOIC-14 | onsemi

onsemi MC1488M is a monolithic quad line EIA-232D driver with four current-limited outputs, supplied in a 14-pin SOIC package. The device provides typical output currents of ±10 mA and a minimum power-off source impedance of 300 Ω. It is designed to interface data terminal equipment with data communications equipment using the EIA-232D signal convention. An EIA-232D line driver is a transmitter within the broader interface IC and RS-232 transceiver categories. Its role is to convert logic-level transmit signals into bipolar voltage levels suitable for EIA-232D communication links. The MC1488M contains four independent driver channels, allowing one package to support multiple serial-data outputs in equipment such as modems, computer interfaces, industrial communications equipment, and legacy peripheral systems. The principal features of the MC1488M include four driver channels, typical current-limited output capability of ±10 mA, a 300 Ω minimum power-off source impedance, and EIA-232D interface conformance. Its 14-pin SOIC package supports surface-mount PCB assembly while reducing the footprint required by a discrete transistor driver arrangement. The M suffix identifies the surface-mount ordering variant presented by onsemi. Internally, the MC1488M combines four line-driver stages with supply-voltage protection arrangements described in the associated device literature. Its monolithic construction provides a practical alternative to separate transistor or MOSFET driver circuits. Because the output stage is designed to source and sink current rather than operate as a logic-level CMOS output, the circuit should be evaluated as an EIA-232D interface stage, not as a general-purpose push-pull logic driver. Typical uses include four-channel RS-232 transmit ports, data terminal equipment, data communications equipment, printer interfaces, and industrial data links. Designers combining this driver with a receiver can construct a complete asymmetric RS-232 interface. The component is especially relevant to legacy systems that require more than two independently driven EIA-232D outputs while retaining a surface-mount footprint. The primary design consideration is the external interface network and supply arrangement. EIA-232D implementations commonly use series resistors and capacitive or diode-clamped protection to manage transient conditions, while supply bypassing must be placed close to the device. Engineers should also verify receiver compatibility, cable requirements, logic levels, and all electrical limits against the manufacturer datasheet before substituting the part into a live design. This product page consolidates the verified manufacturer and distributor information for MC1488M with package details, sourcing guidance, practical design notes, and a strict assessment of available drop-in alternatives. Where the supplied source material does not establish an exact same-package replacement, the page identifies that limitation instead of presenting an unverified substitution as drop-in compatible.

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MC1488MG

MC1488MG - Quad EIA-232D Driver | onsemi | RS-232

The onsemi MC1488MG is a monolithic four-channel RS-232 line driver with a 4/0 driver-to-receiver configuration, current-limited outputs rated at ±10 mA typical, and a 14-pin gull-wing SOIC package. It is designed for data-terminal equipment and data-communications equipment that require an EIA-232D-compatible transmit interface. The MC1488MG is identified as the commercial extended-temperature grade in distributor and catalog records. An RS-232 line driver is an interface IC that converts digital logic-level signals into unbalanced, bipolar voltage levels suitable for serial data links. Within the signal-chain hierarchy, it belongs to the RS-232 interface-driver family, combines with an RS-232 receiver to form a complete communications path, and ultimately provides the physical-layer function required between data terminal equipment and data communications equipment. Unlike a transceiver, the MC1488MG provides four driver channels and no receiver channels. The primary verified characteristics are four independently available line-driver outputs, EIA-232D conformance, typical current limiting of ±10 mA, a 14-pin SOIC package with gull-wing leads, and a commercial extended temperature grade. The output current limit protects the driver stage when a connected RS-232 line is shorted or misconfigured. Because four transmit channels are provided, one device can support four RS-232 outputs while reducing the number of external line-driver packages required. The MC1488MG is intended for legacy and industrial serial-control equipment where EIA-232D signaling remains required. Appropriate uses include multi-port controller interfaces, equipment test systems, point-to-point serial links, and control panels. The device requires suitable bypass capacitance and careful grounding because the implemented system also depends on cable characteristics, receiver thresholds, protection networks, and the voltage levels allowed by the selected RS-232 endpoint. For new designs, engineers should verify signal polarity, baud rate, logic thresholds, and electrical limits against the current manufacturer datasheet before layout release. The supplied search results confirm the EIA-232D driver function, four-output organization, ±10 mA typical output current, and 14-pin SOIC format, but several detailed timing, voltage, temperature, and absolute-maximum values were not included in the retrieved records. This page combines verified distributor and manufacturer-linked information, structured technical context, pin-compatible replacement guidance, and practical sourcing notes. It also separates confirmed electrical facts from parameters that require datasheet verification, helping engineers avoid assigning unsupported specifications to this legacy-compatible RS-232 interface device.

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MC1488N

MC1488N - Quadruple RS-232 Line Driver | Texas Instruments

Texas Instruments MC1488N is a monolithic quadruple RS-232 line driver with four driver channels, 10 mA typical current-limited output, and a minimum 300 ohm power-off output impedance. Designed for data-terminal equipment and data-communications equipment interfaces, the device operates from a 5 V supply in a 14-pin PDIP package rated for 0 to 70 degrees C. A line driver is a digital interface circuit that converts low-voltage logic signals into RS-232-compatible voltage levels. The MC1488 belongs to the RS-232 driver hierarchy, where a line driver interfaces data-terminal equipment with data-communications equipment. Its four channels allow one package to support four unidirectional serial data paths, reducing component count in multi-port or multi-channel RS-232 equipment. The device is designed to meet or exceed ANSI EIA/TIA-232-E and ITU Recommendation V.28 requirements. According to the Texas Instruments manufacturer datasheet, each output includes current limiting, and the power-off output impedance is at least 300 ohms. A series diode is used at each supply-voltage terminal, while the output slew rate can be controlled through the load capacitance connected to each driver. The MC1488N is designed to be interchangeable with the Motorola MC1488, which supports PCB sourcing flexibility where the original function is required. The manufacturer datasheet identifies the MC1488, SN55188, and SN75188 as monolithic quadruple line drivers, but device ordering suffixes, temperature ranges, and package variants must still be checked before substitution. The N suffix identifies the 14-pin PDIP configuration shown in the verified Texas Instruments part-details data. Typical uses include RS-232 interfaces in data-terminal equipment, data-communications equipment, industrial control systems, point-of-sale equipment, printers, and legacy serial-port adapters. It is particularly useful where multiple RS-232 channels share a common logic interface and a through-hole package is preferred for serviceability or manual assembly. PCB layout should keep each driver output away from sensitive analog and high-speed digital traces because RS-232 transitions can produce edge-related EMI. The data input pins must be driven only when the supply is valid, and unused outputs should be handled according to the manufacturer datasheet rather than left as floating high-impedance nodes. Confirm output polarity and logic levels before interchanging it with a receive/transceiver device.

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MC1488NE4

MC1488NE4 - Quad RS-232 Line Driver 300kbps | Texas Instruments

The Texas Instruments MC1488NE4 is a quadruple RS-232 line driver with four independent drivers rated for data rates up to 300 kb/s, operating from dual supplies of 7.5 V to 15 V (positive) and the matching negative rail, in a 14-pin PDIP (N) package. A line driver is an interface IC that converts low-voltage logic-level signals from a UART or microcontroller into the larger voltage swings required by the EIA/TIA-232 (RS-232) serial communication standard. Within the signal-chain hierarchy, it sits between the digital controller and the physical serial cable, and forms a driver-receiver pair with companion parts such as the MC1489 quadruple line receiver. RS-232 remains common in industrial equipment, point-of-sale terminals, and legacy instrumentation despite newer USB and Ethernet links. The MC1488NE4 provides four drivers in one package, each with TTL/CMOS-compatible inputs and RS-232-level outputs. Output signal swing is set by the supply rails, allowing engineers to tailor output levels via the positive and negative supplies. Typical output current capability supports driving standard RS-232 cable capacitance at data rates up to 300 kb/s, per the manufacturer datasheet. The N suffix package is molded PDIP, suited to through-hole prototypes and repair of legacy boards. Architecturally, the part uses a monolithic bipolar process. Each driver contains ainput stage, phase-splitting stage, and output structure referenced between the two supply rails, producing output swings that meet EIA-232-E voltage requirements when supplies are appropriately chosen. Series elements at the supply terminals are used in the manufacturer's typical application to improve robustness. Typical applications include UART-to-RS-232 conversion in industrial terminals, modem and DTE-to-DCE interfacing, programming and debugging ports on legacy equipment, and educational/lab serial circuits. It pairs naturally with the MC1489 or DS1489 receiver on the far end of the link. Design consideration: the MC1488 requires both a positive and a negative supply rail - systems lacking a negative rail need a charge-pump converter such as the MAX232 family or ICL232, which integrate the voltage generation. Also verify power dissipation with multiple drivers switching simultaneously. This page adds value beyond the manufacturer datasheet by synthesizing drop-in alternative cross-references (DS14C88, SN75188, SN75C188), comparison tables, and practical design notes in one place for sourcing and design engineers.

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MC1488P

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.

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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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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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Subcategorias

Produtos (39.000+)

MC1488D - Quad EIA-232D Driver | onsemi | RS-232 Interface

MC1488DG - Quad EIA-232D Driver | onsemi | RS-232 Interface

MC1488M - Quad EIA-232D Driver, SOIC-14 | onsemi

MC1488MG - Quad EIA-232D Driver | onsemi | RS-232

MC1488N - Quadruple RS-232 Line Driver | Texas Instruments

MC1488NE4 - Quad RS-232 Line Driver 300kbps | Texas Instruments

MC1488P - Quad RS-232 Line Driver | STMicroelectronics

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

MC1489AD - Quad EIA-232D Receiver IC | onsemi

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

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

MC1489AP - Quad RS-232 Receiver | STMicroelectronics

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

MC1489DG - Quad EIA-232D Line Receiver | onsemi

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

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

MC1489N - Quad RS-232 Line Receiver | Texas Instruments

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

MC1489P - Quad RS-232 Line Receiver | STMicroelectronics

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

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

MC1648M - Voltage-Controlled Oscillator | Motorola

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

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