Integrierte Schaltungen

MC1458DE4

MC1458DE4 - Dual 1 MHz Op Amp | Texas Instruments

Texas Instruments MC1458DE4 is a dual general-purpose operational amplifier with two independently usable amplifier circuits, a 1 MHz gain-bandwidth product, and a 0.5 V/µs slew rate. The device is packaged in an 8-pin SOIC measuring 0.154 inch, or 3.90 mm, in width. It is intended for general-purpose analog signal conditioning and is described as a dual operational amplifier whose internal frequency compensation eliminates the need for external compensation components. An operational amplifier, or op amp, is a voltage-gain building block within analog and mixed-signal electronics. MC1458DE4 belongs to the general-purpose operational-amplifier class and contains two amplifier channels in one package. Its internally compensated architecture simplifies circuit construction in voltage followers, summing amplifiers, comparators, and general signal-conditioning networks. The two channels can process different analog signals or can be used together for filtering, instrumentation, and differential circuit functions when the application requires it. Key characteristics include two amplifier circuits, a 1 MHz gain-bandwidth product, a 0.5 V/µs slew rate, a 15 V supply designation, and integrated frequency compensation. The manufacturer describes the amplifier as low-power, protected against latch-up, and intended for voltage-follower use. Unlike implementations that expose offset-null terminals, the MC1458 family is described as having each amplifier half electrically similar to a µA741 without offset-null capability. The absence of those terminals simplifies the pin assignment and reduces external component count. The internally compensated amplifiers provide stable operation in voltage-follower configurations without external frequency-compensation networks. Their approximately 1 MHz bandwidth is suitable for audio-frequency and general instrumentation signal paths where moderate bandwidth is sufficient. The 0.5 V/µs slew rate determines how rapidly output voltage can follow a changing input, making the device appropriate for general analog amplification rather than high-speed pulse or wideband signal processing. Typical uses include audio preamplification, summing and averaging amplifiers, voltage followers, sensor signal conditioning, comparator-style threshold circuits, and educational or laboratory analog designs. The 8-pin SOIC package allows two amplifier channels to be placed on a compact through-hole PCB footprint, while the device's two-circuit organization can reduce component count when both positive and negative signals are processed. Designers should account for supply headroom, common-mode input range, output swing, and the bandwidth available at the selected closed-loop gain. Decoupling capacitors should be placed close to the supply pins, and sensitive analog layouts should minimize trace resistance and coupling from switching circuitry. The most important sourcing check is pinout and footprint compatibility, because different package suffixes of the MC1458 family can use different standard packages. This product page consolidates the MC1458DE4 electrical identity, package information, practical use cases, verified source links, and design guidance. It also distinguishes confirmed drop-in candidates from package or electrical variants, helping engineers evaluate replacements without assuming that a similar amplifier description guarantees a compatible PCB footprint.

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MC1458DR

MC1458DR - Dual 1MHz Op Amp, ±15V, 8-SOIC | Texas Instruments

The Texas Instruments MC1458DR is a dual general-purpose operational amplifier integrating two internally compensated op amps in an 8-pin SOIC (D) package, originally designed to be pin-compatible with the classic Motorola MC1458 and Signetics N5558/S5558 parts. Each channel delivers a gain bandwidth product of 1 MHz with a 0.5 V/us slew rate and operates from split supplies of plus/minus 5 V to plus/minus 15 V, or equivalently from a single supply of 10 V to 30 V. The output stage swings within a few volts of each rail, and the inputs cover the full common-mode range including the negative rail, which simplifies single-supply signal-conditioning designs. An operational amplifier (op amp) is a high-gain DC-coupled voltage amplifier with differential inputs and a single-ended output. In the system hierarchy, the MC1458DR sits as a general-purpose linear IC under amplifier ICs, which itself belongs to the broader family of analog signal-conditioning components and integrated circuits. The MC1458DR is specifically a dual-channel, internally compensated design that requires no external frequency-compensation capacitor, simplifying PCB layout versus discrete-transistor op-amp implementations. Key features include short-circuit protection on the output stage, low power consumption of approximately 1.7 mA per amplifier at plus/minus 15 V, no latch-up, and wide common-mode plus differential voltage ranges. The two channels share a single bias network, giving matched DC behavior that suits difference amplifiers, active filters, and dual-channel transducer signal chains. Each channel is a complete bipolar op amp with internal compensation, allowing the part to be used as a direct functional replacement for legacy 1458-family designs with no circuit changes. Architecturally, the MC1458DR uses a classic bipolar transistor input stage with an active load, a Darlington intermediate stage, and a class-AB complementary emitter-follower output, mirroring the topology of the uA741 but with two channels on one die. The dual-die design eliminates the need for an external compensation capacitor on each channel; instead, the internal capacitor is trimmed during wafer test. This mature architecture trades raw speed for excellent DC accuracy, low input bias current relative to JFET alternatives, and predictable behavior over the full 0 to 70 degrees C commercial temperature range. Typical applications include active filtering, transducer signal conditioning, instrumentation front ends, integrators and comparators, audio preamplifiers, and general-purpose dual-channel amplification in industrial controls and consumer electronics. The matched pair also makes it well-suited for differential amplifiers driving downstream ADCs. When designing with this part, observe the absolute maximum differential input voltage of plus/minus 30 V and ensure the input common-mode range is respected to avoid phase inversion. Bypass supplies with a 0.1 uF ceramic capacitor close to the VCC+ and VCC- pins to prevent oscillation in unity-gain buffer configurations. This page synthesizes distributor pricing, drop-in replacement candidates for the dual 1458 pinout, and practical design notes not consolidated in the manufacturer datasheet.

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MC1458DT

MC1458DT - High-Performance Dual Op Amp | STMicroelectronics

The STMicroelectronics MC1458DT is a high-performance, monolithic, dual operational amplifier with a wide input common-mode voltage range, supplied in an 8-pin SOIC package. The device contains two amplifiers and is intended for general-purpose analog signal-conditioning applications. Its high gain, wide operating-voltage range, and general feedback architecture support integrator, summing-amplifier, comparator-style, and precision feedback designs. An operational amplifier is an analog integrated circuit that amplifies the difference between two input voltages. The MC1458 belongs to the operational-amplifier family, which is part of the broader analog IC and semiconductor hierarchy. Operational amplifiers are used wherever a circuit must amplify, buffer, filter, integrate, or compare a small electrical signal, making them foundational building blocks in instrumentation, control, communications, and consumer equipment. Key features of the MC1458 include its dual-amplifier configuration, high-performance monolithic construction, wide input common-mode voltage range, and low power consumption. The dual format allows two independent amplifier channels in one package, reducing board area and simplifying designs that require matched amplification stages. Its general-purpose feedback configuration makes it useful in both conventional closed-loop amplifier circuits and active analog networks. The MC1458 is specified for a wide range of operating voltages, which gives designers flexibility when using it with different supply rails and signal levels. The device is suitable for integrator and summing-amplifier applications because its high gain and feedback characteristics support accurate closed-loop operation. The manufacturer describes the MC1458 as intended for a wide range of analog applications rather than a single narrow use case. Typical applications include audio preamplification, sensor signal conditioning, analog filtering, instrumentation, general feedback control, and low-frequency analog signal processing. Its SOIC-8 package also makes it practical for conventional PCB assembly where dual-channel analog amplification is required. Designers should verify supply voltage, input common-mode range, output swing, stability, and load requirements against the manufacturer datasheet for the exact operating conditions. When designing around the MC1458DT, use appropriate input and output bypassing, keep feedback paths short, and verify that the selected operating point remains inside the device's electrical limits. This page combines the verified manufacturer and distributor information with practical selection guidance and drop-in cross-reference context for engineers evaluating the MC1458 family.

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MC1458ID

MC1458ID - Dual High-Performance Operational Amplifier | STMicroelectronics

The STMicroelectronics MC1458ID is a high-performance dual operational amplifier integrated circuit with two amplifier circuits in an 8-pin SOIC package. It is intended for general-purpose analog signal-processing applications, including summing amplifiers, voltage followers, integrators, active filters, and function generators. The device is identified as a low-noise, wide-temperature-range dual op amp with short-circuit protection and no frequency-compensation requirement. An operational amplifier is a voltage-feedback analog amplifier used to amplify the difference between two input voltages. In a feedback network, the MC1458ID can provide high closed-loop gain, signal buffering, impedance transformation, and active-filter functions. Its dual-circuit architecture places two independent amplifiers in one package, reducing board area when a design requires two analog signal channels. The MC1458ID is described as a high-performance monolithic dual operational amplifier with low power consumption and a large input-voltage range. The device also features high gain, short-circuit protection, no-latch-up behavior, and operation without frequency compensation. These characteristics make it suitable for instrumentation, audio signal processing, active filtering, summing and integrating circuits, and general analog control systems. The MC1458ID uses a conventional dual-amplifier architecture rather than a digitally controlled or precision-specialty amplifier. Its two channels are packaged in an 8-SOIC, allowing a compact surface-mount implementation. The wide operating-voltage capability supports varied analog supply conditions, while the low-noise designation is relevant to applications in which signal integrity and small-signal amplification matter. Typical uses include audio preamplification, instrumentation buffering, active filters, summing amplifiers, integrators, voltage followers, and function-generator circuits. In an instrumentation application, the device can buffer sensor outputs before conversion or further processing. In audio systems, one channel may process one signal path while the second handles another, provided the power supply and grounding arrangement support both circuits. When designing around the MC1458ID, use the manufacturer pin-description table to assign supply, input, and output connections, and observe the dual-amplifier decoupling requirements. Place bypass capacitors close to the supply pins, keep feedback-loop routing short, and check input and output signal limits against the device operating conditions before finalizing the board layout. This product page combines the STMicroelectronics MC1458ID device identity, package information, functional applications, sourcing structure, and practical design guidance to support faster component selection and board-level implementation.

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MC1458IN

MC1458IN - Dual High-Performance Op Amp | STMicroelectronics

STMicroelectronics MC1458IN is a dual, high-performance, general-purpose operational amplifier packaged in an 8-pin Mini DIP. Each integrated circuit contains two amplifier channels, allowing one component to implement independent amplification, buffering, summing, integration, or feedback functions. The device is specified as a standard general-purpose amplifier, and a distributor listing identifies a slew rate of 0.8 V/µs. It is supplied in the through-hole DIP-8 package represented by the MC1458IN ordering code. An operational amplifier, or op amp, is a high-gain analog building block that compares its inverting and non-inverting inputs and drives an output toward the difference between those voltages, subject to negative feedback. Within the product hierarchy, the MC1458IN is a dual op amp, which is a type of analog amplifier IC used for instrumentation, signal conditioning, voltage following, active filtering, summing, and feedback control. The MC1458 family provides two amplifiers in one monolithic package, reducing component count while preserving independent operation of both channels. Key features include two amplifier circuits in one package, a high-performance monolithic design, general-purpose feedback compatibility, a stated 0.8 V/µs slew rate, and an 8-pin Mini-DIP mounting format. These characteristics make the device suitable for analog systems requiring two precision-oriented signal paths without allocating two separate single amplifier packages. The through-hole package also supports conventional DIP sockets and prototype-board assembly. According to the STMicroelectronics manufacturer datasheet, the MC1458 is intended for a wide range of analog applications, including integrators, summing amplifiers, and general feedback circuits. Its high gain and broad operating-voltage capability support conventional closed-loop analog designs, while the integrated dual configuration allows signal conditioning and active feedback stages to be placed close together on a board. Typical applications include audio preamplification, instrumentation stages, active filters, analog summing networks, integrators, buffer amplifiers, and general industrial signal conditioning. In a dual-rail circuit, the two channels can process separate inputs or participate in cascaded stages. In single-supply equipment, the usable input and output range still requires careful common-mode and output-swing verification against the manufacturer specifications. Designers should check the datasheet pinout, recommended operating voltages, common-mode range, output swing, offset specifications, compensation requirements, and supply decoupling before finalizing a board. Feedback-network values and source impedances should be selected against the documented frequency-response and noise characteristics rather than estimated from generic 741-family behavior. This page consolidates verified manufacturer and distributor information, documented equivalent-family references, package-level comparison data, and practical selection guidance. It also distinguishes verified facts from parameters that still require confirmation from the current manufacturer datasheet, helping engineers qualify replacements without assuming undocumented electrical equivalence.

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MC1458N

MC1458N - Dual High-Performance Op Amp | STMicroelectronics

STMicroelectronics MC1458N is a dual, internally compensated operational amplifier in an 8-pin Mini DIP package. The device combines two amplifiers in one monolithic IC, providing high open-loop gain, a high common-mode input range, internal compensation, short-circuit protection, and exceptional temperature stability. Its wide operating-voltage range makes it suitable for conventional bipolar power supplies and general analog signal-processing systems. An operational amplifier is an analog IC that amplifies the voltage difference between its inverting and non-inverting inputs while using negative feedback to control gain, bandwidth, and output behavior. The dual MC1458 belongs to the operational-amplifier hierarchy, which extends to analog amplifiers and signal-conditioning ICs. Two independent amplifiers in one package reduce board area and simplify designs requiring matched channel functions. The MC1458's internal compensation removes the need for external frequency-compensation components in standard closed-loop configurations. Its high open-loop gain supports accurate amplification in feedback circuits, while its broad common-mode range accommodates signals around the circuit's bias point. Short-circuit protection improves robustness when an output is overloaded. The product is identified by distributors as a standard, general-purpose, two-circuit amplifier. STMicroelectronics describes the MC1458 as a high-performance monolithic dual operational amplifier intended for a wide range of analog applications. The combination of high gain and wide operating-voltage capability supports integrator and summing-amplifier designs, as well as conventional closed-loop feedback circuits. Because both amplifiers share one package, matching of channel behavior can be beneficial in precision audio, instrumentation, and analog-control products. Typical uses include audio preamplification, active filters, summing amplifiers, integrators, sensor-signal conditioning, and general feedback-based analog stages. The dual topology is especially useful when a board needs two gain stages with a common supply arrangement. The 8-pin Mini DIP through-hole package is also convenient for legacy equipment, educational circuits, and repair applications where a surface-mount footprint would be unsuitable. Designers should verify the exact supply-voltage, input-voltage, output-current, gain-bandwidth, input-offset, and output-swing limits from the manufacturer datasheet before finalizing a new design. Input and output stability must also be checked with the selected feedback network and load. Because through-hole devices can be affected by socket contact resistance, lead oxidation, and longer analog traces, prototype measurements are recommended before production use. This page combines the verified manufacturer and distributor information for MC1458N with package-aware replacement guidance, application context, comparison parameters, and practical design notes. It distinguishes confirmed device characteristics from electrical details that still require verification from the current manufacturer datasheet.

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MC1458P

MC1458P - Dual 1 MHz 30 V Operational Amplifier | Texas Instruments

The Texas Instruments MC1458P is a dual general-purpose operational amplifier in an 8-pin PDIP package, providing two amplifier channels per device. The verified manufacturer data identifies the MC1458 family as a dual, 30 V, 1 MHz operational amplifier, while the MC1458P ordering information identifies the P suffix as the 8-pin PDIP configuration. The amplifiers are designed for conventional analog signal conditioning, including voltage-follower, amplifier, comparator, summing, and general feedback applications. The manufacturer datasheet states that the devices have a high common-mode input voltage range, no latch-up, short-circuit protection, and internal frequency compensation, allowing operation without external compensation components in standard closed-loop configurations. The absence of offset-null capability distinguishes the MC1458 family from the µA741-style devices with null pins, so applications requiring external offset adjustment should use an alternative amplifier with offset-null access. The MC1458P is not a rail-to-rail input or output device based on the verified source information; the available manufacturer description instead emphasizes its wide common-mode input voltage range and high operating voltage. With a 30 V maximum supply framework and 1 MHz gain-bandwidth capability, the device is suitable for audio, instrumentation, industrial control, test and measurement, and general-purpose analog circuits. The internally compensated architecture and short-circuit protection simplify implementation in designs requiring two amplifier channels in one package. Engineers should verify input and output voltage limits, common-mode range, output-current capability, noise, offset, slew rate, and supply-current requirements against the current manufacturer datasheet before production release. This page combines the verified manufacturer and distributor descriptions with package-specific ordering information, practical design notes, and verified cross-reference candidates for engineers evaluating a DIP-8 operational-amplifier replacement.

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MC1458PS

MC1458PS - Dual 30V 1MHz Op Amp | Texas Instruments

The Texas Instruments MC1458PS is a dual general-purpose operational amplifier with two internally compensated amplifier channels, a 30 V rating, and a 1 MHz gain-bandwidth product in an 8-pin SOIC package. The MC1458 family combines short-circuit protection, wide common-mode and differential input-voltage ranges, low power consumption, and latch-up-free operation. An operational amplifier is an analog integrated circuit that uses high-gain differential amplification to compare and amplify small voltage differences. The MC1458 belongs to the general-purpose operational-amplifier family within the broader analog IC and semiconductor hierarchy. Its two channels can operate independently for signal conditioning, voltage following, summing, integration, or other feedback-based amplifier configurations. Each MC1458 channel offers a 1 MHz gain-bandwidth product, 500 V/ms slew rate, and 90 dB common-mode rejection in the supplied product data. The reported input bias current is 1.5 µA, input offset current is 200 nA, and typical input offset voltage is 6 mV. Internal frequency compensation eliminates the need for external compensation components in the manufacturer's standard voltage-follower application. The MC1458 architecture is intended for general-purpose precision amplification rather than high-speed or rail-to-rail operation. Its wide common-mode input range makes it suitable for conventional bipolar-supply circuits, while the absence of latch-up improves robustness during power sequencing and input-overvoltage events. Short-circuit protection helps limit output current when an output is overloaded, although sustained short-circuit duration and internal current limits should be confirmed in the manufacturer datasheet. Typical uses include audio preamplification, summing amplifiers, active filters, sensor-signal conditioning, industrial control blocks, and general voltage-following circuits. Two amplifiers in one package can reduce component count and simplify dual-channel or differential signal-path layouts. The commercial MC1458PS temperature grade is 0 °C to +70 °C, making it appropriate for room-temperature industrial and consumer equipment rather than exposed automotive or extreme-temperature installations. PCB design should reserve adequate copper around the supply pins and route each channel's feedback components close to the associated amplifier pins to reduce parasitic feedback and instability. Decoupling capacitors should be placed directly between each supply pin and ground. Because this is a non-rail-to-rail, bipolar general-purpose amplifier, input and output common-mode headroom must be checked against the actual supply voltages. This page combines verified manufacturer and distributor information, drop-in family alternatives, package and pinout details, application guidance, and design notes to provide more implementation context than the basic distributor catalog entry.

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MC1458PSR

MC1458PSR - Dual 30V 1MHz Op Amp | Texas Instruments (Tape & Reel)

The Texas Instruments MC1458PSR is a dual general-purpose operational amplifier with two internally compensated amplifier channels, a 30 V rating, and a 1 MHz gain-bandwidth product in an 8-pin SOIC package. The MC1458 family combines short-circuit protection, wide common-mode and differential input-voltage ranges, low power consumption, and latch-up-free operation. An operational amplifier is an analog integrated circuit that uses high-gain differential amplification to compare and amplify small voltage differences. The MC1458 belongs to the general-purpose operational-amplifier family within the broader analog IC and semiconductor hierarchy. Its two channels can operate independently for signal conditioning, voltage following, summing, integration, or other feedback-based amplifier configurations. Each MC1458 channel offers a 1 MHz gain-bandwidth product, 500 V/ms slew rate, and 90 dB common-mode rejection in the supplied product data. The reported input bias current is 1.5 µA, input offset current is 200 nA, and typical input offset voltage is 6 mV. Internal frequency compensation eliminates the need for external compensation components in the manufacturer's standard voltage-follower application. The MC1458 architecture is intended for general-purpose precision amplification rather than high-speed or rail-to-rail operation. Its wide common-mode input range makes it suitable for conventional bipolar-supply circuits, while the absence of latch-up improves robustness during power sequencing and input-overvoltage events. Short-circuit protection helps limit output current when an output is overloaded, although sustained short-circuit duration and internal current limits should be confirmed in the manufacturer datasheet. Typical uses include audio preamplification, summing amplifiers, active filters, sensor-signal conditioning, industrial control blocks, and general voltage-following circuits. Two amplifiers in one package can reduce component count and simplify dual-channel or differential signal-path layouts. The commercial MC1458PSR temperature grade is 0 °C to +70 °C, making it appropriate for room-temperature industrial and consumer equipment rather than exposed automotive or extreme-temperature installations. PCB design should reserve adequate copper around the supply pins and route each channel's feedback components close to the associated amplifier pins to reduce parasitic feedback and instability. Decoupling capacitors should be placed directly between each supply pin and ground. Because this is a non-rail-to-rail, bipolar general-purpose amplifier, input and output common-mode headroom must be checked against the actual supply voltages. This page combines verified manufacturer and distributor information, drop-in family alternatives, package and pinout details, application guidance, and design notes to provide more implementation context than the basic distributor catalog entry.

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MC14600P

MC14600P - Low-Power CMOS Alarm IC w/ Horn Driver | NXP DIP-16

The NXP MC14600P is a low-power CMOS alarm IC with integrated piezoelectric horn driver and LED driver, housed in a 16-pin DIP (through-hole) package. It is engineered to convert an analog alarm-level voltage condition into a tone output for a piezo horn and/or an LED indicator with extremely low average current draw, making it ideally suited to long-life battery-operated alarm systems. The part integrates a low-battery detection feature that monitors supply voltage and a minimal external RC network to configure its operating thresholds. An alarm IC is a specialized consumer circuit in the broader semiconductor family of alarm and supervisory ICs (alarm IC -> supervisory circuit -> power management IC). Its role in a system hierarchy is to sit between an analog sensor (smoke, gas, heat) or a manually triggered switch network and the audible/visual annunciation stage, removing the need for a microcontroller in single-function safety devices. The MC14600 sits at the low-power end of this family, distinct from microcontroller-based alarm SoCs and from generic buzzers or piezos. Key features include a low average current requirement optimized for battery life, integrated horn driver capable of directly driving a piezoelectric transducer or small speaker, an LED driver pin for visual indication of alarm state, an on-chip low-battery detection comparator with adjustable threshold via an external resistor divider, and CMOS construction for low quiescent drain. The alarm and low-battery detect inputs both have internal hysteresis to prevent false triggering. Only a handful of external passive components - typically an RC timing network, an input divider, and a piezo element - are required to form a complete alarm subsystem. Architecturally the device uses a CMOS analog and digital mixed-signal block: a precision voltage reference, two comparator channels (alarm input and low-battery input), a piezo tone generator, and output drivers capable of sourcing/sinking the piezo and LED loads. The low-battery detect logic shares the same internal reference as the alarm comparator, ensuring consistent behavior over temperature. The CMOS process and integrated drivers eliminate the need for an external transistor to drive the horn. Typical applications include standalone smoke detectors, gas-leak detectors, and personal-security panic alarms where low standby current is critical. Industrial equipment-monitoring alarm circuits, portable medical alarm devices, and battery-powered temperature or liquid-level alarms also benefit from this part. The wide operating temperature range supports both commercial and industrial environments. Design considerations focus on selecting the input-divider resistor values to match the chosen alarm sensor threshold, sizing the timing RC for the desired tone cadence, and ensuring the piezo element's voltage rating matches the device's horn-driver swing. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond the basic datasheet pinout table.

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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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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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