Circuitos Integrados

MC145557P

MC145557P - 13-Bit A-Law PCM Codec-Filter | Motorola

Motorola, Inc. MC145557P is a single-function A-law PCM codec-filter integrated circuit with 13-bit PCM resolution, offered in a 16-lead PDIP package. It belongs to the MC145554, MC145557, MC145564, and MC145567 family of per-channel devices that combine voice digitization and reconstruction with band-limiting and smoothing functions for PCM communication systems. The component is designed for use in synchronous and asynchronous PCM signal paths. A PCM codec-filter is an interface integrated circuit that processes pulse-code-modulated audio or voice signals between an analog system and a digital PCM channel. Within the broader semiconductor hierarchy, it is a codec and signal-conditioning device within interface ICs, with a more specialized function than a general-purpose audio codec. The MC145557P specifically combines 13-bit PCM processing with A-law encoding in a single 16-lead PDIP package. The principal identified specifications are 13-bit PCM resolution, A-law operation, one codec-filter function, and a 16-pin PDIP package. Its single-function organization makes it suitable for designs that require dedicated per-channel voice conversion rather than a multi-channel codec with additional control and routing functions. The through-hole PDIP format also supports conventional PCB assembly, prototyping, repair, and communication equipment with larger component packages. In a PCM system, the codec-filter provides the conversion and filtering functions needed to digitize voice information, reconstruct received PCM information, and limit the signal band before transmission or processing. Devices in the MC145554, MC145557, MC145564, and MC145567 family perform these per-channel functions and can operate in synchronous or asynchronous systems. The MC145557P is differentiated within that family by its A-law configuration and 13-bit PCM resolution. Typical implementation areas include telephony and voice communication equipment, PCM interface modules, digital voice processing systems, telecommunications line interfaces, and legacy PCM test equipment. Its 16-lead PDIP package may be especially useful where a through-hole footprint is preferred over a surface-mount package, or where the original circuit design already uses this package style. Circuit implementation should follow the Motorola manufacturer datasheet for pin assignment, external component selection, clocking, and signal-path layout. Verify the required A-law system configuration, 13-bit PCM word format, synchronous or asynchronous timing mode, and grounding arrangement before finalizing the PCB. The PDIP footprint also requires adequate lead spacing and clearance from adjacent components. This product overview consolidates the confirmed codec type, PCM resolution, A-law configuration, package format, sourcing context, and functional relationships into an engineering-focused reference. It also provides application guidance, design cautions, package information, and links to the manufacturer documentation needed for an informed design decision.

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MC14555BF

MC14555BF - Dual 1-of-4 CMOS Decoder | onsemi

The onsemi MC14555BF is a dual binary-to-1-of-4 decoder/demultiplexer built with complementary MOS enhancement-mode devices, packaged in a 16-pin SOIC. Each decoder section has two select inputs, A and B, an active-low enable input, E, and four mutually exclusive outputs, Q0 through Q3. The selected output switches high while the other three outputs remain low. A nominal 5 V supply and 440 ns propagation delay at a 50 pF load are identified for the device. A decoder or demultiplexer is a combinational logic device that converts a binary selection code into one active output path. The dual architecture provides two independent binary-to-1-of-4 conversion channels in one IC. This hierarchy places the MC14555BF in the CMOS logic family, specifically within decoder and demultiplexer logic ICs used to route control, address, or selection signals. The principal feature is active-high decoding: the selected output goes to the high state, while the three unselected outputs remain low. Two select inputs permit all four output positions to be addressed. An active-low enable input provides a common control function for disabling the decoding network. The complementary MOS construction supports low-power operation and compatibility with conventional CMOS logic systems. The MC14555BF combines two complete decoder/demultiplexer functions in one package, reducing component count in designs that require parallel four-way selection. Its 440 ns propagation delay at a 50 pF load provides useful timing guidance for control paths where propagation delay must remain predictable. The 16-pin SOIC package also supports conventional surface-mount assembly and inspection. Typical uses include four-way control-signal routing, address selection, display or peripheral selection, instrumentation multiplexing, and industrial control logic. Because the device is CMOS and operates from a nominal 5 V supply, it is particularly appropriate for systems using 5 V digital logic levels. The enable input can also support shared bus isolation or synchronized selection in a larger controller. Design with the active-low enable polarity and active-high output polarity clearly in mind. Confirm the voltage ratings, absolute maximum conditions, output drive capability, and timing limits in the onsemi datasheet before finalizing a new design. Place the device so that switching outputs do not unintentionally drive adjacent high-impedance nodes, and validate fanout against every connected load. This product page combines the manufacturer function description, package information, timing indications, application guidance, structured specifications, and engineering design notes to accelerate component evaluation. Request current commercial availability and sourcing terms through the Request a Quote form on this page.

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MC14556BD

MC14556BD - 1-of-4 CMOS Decoder/Demultiplexer | Motorola

The Motorola MC14556BD is a dual binary to 1-of-4 decoder/demultiplexer built with complementary MOS enhancement-mode devices. It accepts two select inputs, A and B, together with an active-low enable input, E, and routes one of four mutually exclusive outputs, Q0 through Q3, according to the select state. The device operates from 3 V to 18 V, supports operation from -55 °C to 125 °C, and is packaged in a 16-pin SOIC. A decoder/demultiplexer is a logic device that converts binary selection information into one active output path. This makes the MC14556BD useful for control, address decoding, peripheral selection, data routing, and test-point multiplexing. Its four outputs are designed so that only one selected output is active for a valid select combination while the enable input provides an additional gating function. The complementary MOS construction places the device in the 4000-series CMOS logic family. The principal electrical characteristics are a 3 V to 18 V supply range, low-power CMOS operation, and an active-low enable control. The package is a 16-SOIC, also described in listings as SOIC-16 or PDSO16, with a body width of 3.90 mm and a nominal 0.154 inch lead pitch. The operating-temperature range of -55 °C to 125 °C supports industrial and extended-temperature equipment where the additional qualification and sourcing requirements are satisfied. The MC14556BD can decode a two-bit command into one of four mutually exclusive destinations, making it appropriate for selecting one sensor, switching one bank of loads, directing a signal path, or controlling a group of digital peripherals. Because it is a demultiplexer, the enable input can inhibit output activity during reset, initialization, or shared-bus conditions. Designers should account for propagation delay and output transition timing when operating at high system clock rates. For reliable PCB implementation, place the device close to the signals it decodes, route the enable and select nets away from noisy switching nodes, and maintain a common ground reference between the logic device and connected circuitry. Use the manufacturer pin-description and logic diagrams when assigning PCB tracks because the available product documentation does not reproduce a verified pin-by-pin connection table here. This product page combines the device’s verified function, supply range, package, temperature range, and sourcing information with application guidance, comparison parameters, and practical design notes. The result helps engineers identify whether the MC14556BD fits a new decoder/demultiplexer design or whether a different logic function is required.

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MC14556BF

MC14556BF Dual 1-of-4 Decoder/Demultiplexer | onsemi

The onsemi MC14556BF is a dual binary-to-1-of-4 decoder/demultiplexer built with complementary MOS enhancement-mode devices, supplied in a 16-pin gull-wing surface-mount package. Each decoder section accepts two select inputs, A and B, and uses the four binary combinations to address four mutually exclusive outputs. A shared active-low Enable input controls whether the selected output path is active, making the device useful for address decoding, data routing, chip selection, and control-signal multiplexing. A decoder/demultiplexer is a digital logic IC that translates a binary address into one active output. It belongs to the decoder hierarchy within combinational logic, interface ICs, and broader semiconductor products. In demultiplexer mode, the MC14556BF routes one selected output according to the A and B inputs. The active-low Enable input provides a common gating function, allowing the selected path to be disabled without changing the select state. The verified device information identifies complementary MOS enhancement-mode construction, two select inputs, one active-low Enable input, and four mutually exclusive outputs labeled Q2 and Q3 within the family description. Its specified temperature grade is military, and the package is described as a rectangular gull-wing SOP with 16 terminals. These characteristics place it in applications that require compact binary decoding alongside conventional through-hole-era logic-package compatibility. Typical uses include selecting one of four peripheral sections, decoding a two-bit control address, separating mutually exclusive commands, and directing a shared signal toward one of four destinations. Because the outputs are mutually exclusive, the active output provides a straightforward way to convert a two-bit binary value into a one-of-four selection without implementing individual Boolean gates at the system level. When laying out a board, place the device near the signals it decodes and route each output according to its assigned destination. Maintain a common ground reference with the controlling logic and connected circuits. Treat all unused inputs according to the manufacturer logic truth table, and do not infer active levels or output polarity from the output names alone. Review the pin-description and truth-table sections in the manufacturer datasheet before finalizing PCB nets. This page consolidates the device identity, package information, decoder architecture, sourcing workflow, comparison framework, and practical design considerations. It also distinguishes documented facts from parameters that require direct confirmation from the manufacturer datasheet, helping engineers plan a review of the MC14556BF without relying on incomplete distributor summaries.

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MC145572FN

MC145572FN - ISDN U-Interface Transceiver 44-PLCC | NXP

The NXP (formerly Motorola/Freescale) MC145572FN is a single-chip ISDN U-interface transceiver housed in a 44-pin PLCC (Plastic Leaded Chip Carrier) package. It implements the 2B1Q four-level line code defined by ANSI T1.601 for full-duplex digital transmission on a 2-wire metallic loop, supporting basic-rate access on the U reference point between the network termination (NT1) and the line card (LT). The device integrates echo cancellation, adaptive equalization, and a 2B+D (144 kbps) data channel into one CMOS IC originally developed by Motorola Semiconductor. An ISDN U-interface transceiver is the analog front-end IC that bridges digital ISDN terminal equipment with the 2-wire subscriber line. Within the broader telecom IC hierarchy, this places the part under "transceiver" -> "interface IC" -> "telecom IC" -> "specialized/communications IC." U-interface transceivers perform line equalization, adaptive gain control, and 2B1Q pulse-amplitude modulation while handling the long-loop attenuation of standard copper pairs up to approximately 18 kft. Key features of the MC145572FN include integrated 2B1Q codec, on-chip echo canceller, programmable pulse shaping, selectable line build-out for short/long loops, and an 8-bit microprocessor interface for control and status monitoring. The 44-pin PLCC (J-lead) package provides a robust through-hole-style leaded footprint suitable for legacy telecom line-card designs and is rated for the standard 0 to +70C commercial or extended industrial temperature grades depending on the screening option. Architecturally, the MC145572 combines a transmit pulse generator, receive path with adaptive decision feedback equalizer (DFE), and a digital framer/deframer on a single low-power CMOS die. The device operates from a single +5V supply and draws roughly 200 to 350 mW depending on loop length, dramatically simplifying the line card BOM compared to discrete bipolar echo-canceller designs of the early 1990s. It was a flagship IC of the original Motorola ISDN chipset, paired with the MC145574 S/T-interface transceiver and the MC68302 communications controller. Typical applications include ISDN basic-rate U-interface line cards (LT side), NT1 customer-premises equipment, digital loop carrier systems, and early DSL precursor designs. Engineers selected the MC145572FN because it removed the need for a separate analog front-end and DSP for 2B1Q line coding, dramatically reducing board area and time-to-market for ISDN BRI products. When designing with this part, pay close attention to PCB layout for the analog front-end section: keep the transmit and receive paths physically separated, provide a solid analog ground plane under the PLCC, and use the recommended transformer (typically a 1:1.36 or 1:2 turns ratio Pulse PE-68023 or equivalent) for isolation. Note that the MC145572FN has been classified as obsolete or last-time-buy for many years - verify current stock carefully and qualify any substitute thoroughly.

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MC145572FNR2

MC145572FNR2 - ISDN U-Interface Transceiver, 44-PLCC | NXP

The NXP (formerly Freescale/Motorola) MC145572FNR2 is an ISDN U-interface transceiver IC housed in a 44-pin PLCC (16.59 x 16.59 mm) J-leaded surface-mount package. It integrates the analog front-end and digital echo-cancellation functions required for full-duplex 2B1Q transmission over a 2-wire ISDN U-interface loop, and is designed to operate as a companion to the MC145574 S/T-interface transceiver in customer-premises equipment (CPE) or network-terminal designs. The device supports 4-wire full-duplex data flow at the standard ISDN Basic Rate Access (BRA) line rate of 160 kbps over twisted-pair copper loops up to approximately 5-6 km. An ISDN U-interface transceiver is a specialized line-interface IC that bridges digital terminal equipment and the 2-wire metallic local loop of the public switched telephone network. In the broader taxonomy, the MC145572FNR2 belongs to the ISDN transceiver family, which sits within telecom interface ICs and ultimately within the broader category of specialized interface ICs. The U-interface (defined in ANSI T1.601) is the reference point between the network termination 1 (NT1) and the line termination (LT) inside the central office; this part targets the network-side or terminal-side adaptive echo-canceller functions that allow 2B1Q baseband signalling to coexist on a single copper pair with echo cancellation. Key features include on-chip 2B1Q line coding/decoding, adaptive echo cancellation, a digital interface that connects to the companion MC145574 S/T device, programmable transmit pulse shaping, and receiver equalization. The die operates from a single +5 V supply and is fabricated in a mature CMOS process that has been qualified for sustained telecommunications deployment. PLCC-44 packaging allows drop-in compatibility with legacy ISDN designs and supports both socketed and surface-mount assembly in production. Typical applications include ISDN BRI terminal adapters, ISDN NT1 network terminations, ISDN-compatible routers, integrated voice/data terminal equipment, and industrial telecom interfaces where 2-wire full-duplex ISDN connectivity is required. Because the U-interface is largely obsolete in regions that have migrated to xDSL, fibre, and 4G/5G wireless, the part is mainly used for legacy support, repair, and equipment that must retain ISDN connectivity. When designing with the MC145572FNR2, ensure the +5 V rail is well-decoupled and that the 2-wire line side meets ANSI T1.601 longitudinal-balance and pulse-mask requirements. Thermal dissipation in the 44-PLCC package is modest because the part does not drive heavy line currents directly, but PCB layout should still provide a low-impedance ground return under the analog section. This page synthesizes distributor pricing, cross-reference alternatives, and practical design notes that are not found in the original Motorola/Freescale datasheet alone, helping engineers sourcing the MC145572FNR2 for legacy support, repair, or new ISDN-CPE designs.

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MC145572PB

MC145572PB - ISDN U-Interface Transceiver, 44-LQFP | NXP

The NXP MC145572PB is an ISDN U-interface transceiver housed in a 44-pin LQFP (10x10 mm) package, originally designed by Motorola and later transferred through Freescale to NXP. It is a specialized interface IC operating at 5V with an industrial temperature range of -30C to +85C, supporting data rates of up to 160 kbps for 2B1Q ISDN basic-rate-access (BRA) U-interface applications. An ISDN U-interface transceiver is a type of specialized interface IC that handles the physical-layer signaling between customer-premises equipment (CPE) and the central-office line card over a 2-wire full-duplex digital subscriber loop. Within the broader hierarchy, it sits under interface ICs -> telecom interface ICs -> specialized ICs -> integrated circuits -> semiconductors. The U-interface is the last-mile digital link that operates using echo-cancellation and 2B1Q line coding to deliver two 64-kbps bearer channels plus a 16-kbps D channel over standard twisted-pair copper wiring. Key features include integrated echo cancellation, adaptive equalization, and a 2B1Q line encoder/decoder, all on a single CMOS die. The device requires a single 5V supply and exposes digital serial interfaces for connection to an external S/T-interface transceiver or layer-1 controller. Its 44-LQFP (10x10) package offers a 0.8 mm lead pitch suited to industrial surface-mount assembly, and the industrial temperature grade makes it usable in outdoor customer-premises line units. Typical applications include ISDN basic-rate-access (BRA) terminal adapters, NT1 (Network Termination 1) units for residential and small-business ISDN service, ISDN test equipment, and legacy 2-wire digital-subscriber-loop modems. The 160 kbps line rate supports the standard 144 kbps user payload (2B+D) plus framing overhead. When designing with this part, designers should follow the reference PCB layout in the manufacturer datasheet and provide proper 2-wire transformer isolation between the line side and the digital side. Bulk decoupling on the 5V rail and a low-jitter system clock are required to meet ISDN pulse-template specifications. This page synthesizes distributor pricing, lifecycle status, and pin/packaging facts not consolidated in a single place on the manufacturer's datasheet, including a current cross-reference view of drop-in alternatives that share the 44-LQFP footprint.

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MC145572PBR2

MC145572PBR2 - ISDN U-Interface Transceiver | NXP | 44-LQFP

The NXP (formerly Freescale / Motorola) MC145572PBR2 is a single-chip ISDN U-interface transceiver designed for 160 kbps full-duplex 2B1Q transmission over a single twisted-pair copper line. Housed in a 44-pin LQFP (10x10 mm) surface-mount package, this specialized IC integrates the analog front-end, echo canceller, digital signal processor, and HDLC controller required for both the network-termination (NT) and line-termination (LT) sides of an ISDN basic-rate interface, with the side selected at power-up by a single pin. In the broader product hierarchy, the MC145572PBR2 is a specialized telecommunications IC — a sub-category of interface ICs that bridges the physical layer of legacy ISDN and 2B1Q transport systems to higher-layer HDLC processors. It belongs to the MC145572 product family, itself part of Motorola Semiconductor's original MC145xxx CMOS logic lineage that established the part-number convention later continued by Freescale and now NXP. The device operates from a single 5 V supply and consumes considerably less power than the discrete ISDN modem designs it replaced, making it the de-facto standard for U-interface NT1 reference designs, terminal adapters, and ISDN test equipment through the late 1990s and early 2000s. Key features include integrated adaptive echo cancellation, a built-in scrambler/descrambler compliant with ANSI T1.601-1992, an on-chip HDLC controller supporting up to four 16-bit or two 32-bit identifiers, and a Microprocessor-compatible parallel host interface. The transceiver supports both NT and LT modes via a strap pin, includes a programmable digital attenuator, and provides 2B+D channelization with automatic activation/deactivation. Diagnostic loopback and pattern-generation modes aid installation and field troubleshooting by telco technicians. Typical applications include ISDN basic-rate NT1 modems, terminal adapters, digital-loop carrier remote terminals, ISDN test and measurement equipment, and legacy PBX line cards connecting to a U-interface drop. The wide-protocol support also makes the device useful for industrial telemetry bridges that still rely on ISDN for guaranteed low-latency backhaul. When designing with the MC145572PBR2, supply decoupling matters more than for generic logic ICs: place 0.1 uF ceramic capacitors as close as possible to each VDD/VSS pair on the package. Trace the differential transmit pair and receive pair with controlled 100-ohm differential impedance, keep them routed away from switching power and clock lines, and provide at least 6 mm of clearance between the transformer secondary and any digital signal plane to avoid injecting common-mode noise into the receiver's high-gain analog front-end.

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MC1455BD

MC1455BD - 5V Programmable Timer/Oscillator | onsemi

The onsemi MC1455BD is a single 555-type timer and oscillator integrated circuit designed for accurate time delays and free-running oscillation. It operates from a 5 V supply and is packaged in an 8-pin SOIC. The MC1455BD combines a precision timing circuit with trigger and reset inputs, allowing it to be configured as a monostable one-shot or an astable oscillator using external resistors and capacitors. A 555 timer is a type of programmable timer and oscillator within the broader clock and timing IC hierarchy. Its internal comparators, flip-flop, and discharge transistor allow a simple external RC network to determine delay time or oscillation frequency. Compared with a mechanical or discrete timing arrangement, the MC1455BD provides a compact and repeatable implementation for pulse generation, delay, flashing, and periodic control functions. Key features include support for both monostable and astable operating modes, externally adjustable timing through one resistor and one capacitor in monostable operation, and separate trigger and reset terminals. The verified distributor information identifies the device as a 5 V, 555 Type, Timer/Oscillator (Single) IC in an 8-SOIC package. The onsemi datasheet also describes additional terminals for triggering or resetting when required. The MC1455 architecture provides two useful operating behaviors. In monostable mode, a trigger pulse causes the output to enter a defined high state for a duration set primarily by the external timing resistor and capacitor. In astable mode, the output repeatedly switches between high and low states, with the external resistor-capacitor network setting the operating frequency and duty cycle. This makes one device suitable for both one-shot event timing and continuous pulse generation. Typical applications include industrial control timers, LED flashers, pulse generators, delay circuits, repetitive switching circuits, and general-purpose timing modules. Its 8-pin SOIC package supports compact surface-mount PCB layouts, while the external RC components allow timing values to be selected for the particular load and system requirements. The device is also useful as the timing element in educational and prototype circuits where both monostable and astable configurations may be exercised. Designers should select resistor and capacitor values that keep the timing network within the operating limits stated by the manufacturer datasheet and should account for component tolerance when precise timing is required. The trigger and reset pins must be driven only to valid logic levels, and unused or unused-at-a-time inputs should be handled according to the datasheet rather than left floating. PCB layout should keep timing-node connections short and provide an adequate ground return. This page combines verified manufacturer and distributor information, package and pin references, commercial availability, and qualified drop-in alternatives. It also provides application guidance and parameter-level comparison information intended to make timer selection and PCB reuse easier than a raw datasheet summary alone.

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MC1455DG

MC1455DG - Single 555 Timer, 16V, 8-SOIC | onsemi

The onsemi MC1455DG is a single general-purpose 555 timer integrated circuit with a 4.5 V to 16 V supply range, housed in an 8-pin SOIC package. It can generate accurate time delays or free-running oscillations using external resistors and capacitors, while dedicated trigger and reset terminals provide additional control over the timing interval. The device is intended for precision delay, pulse-generation, and oscillator applications in industrial and commercial electronics. A 555 timer is an analog timing integrated circuit that combines a voltage comparator, a flip-flop, discharge transistor, and resistive divider into one reusable building block. Within the broader hierarchy, it is a clock and timing IC within integrated circuits, providing a simple alternative to a dedicated programmable timer or microcontroller-based timing solution. The MC1455 can operate as a monostable one-shot, as an astable oscillator, or as a Schmitt-trigger comparator. The MC1455DG provides a single timer in an 8-SOIC package, operates from 4.5 V to 16 V, and is specified for a 0°C to 70°C temperature range. In monostable mode, one external resistor and one capacitor control the output pulse duration. In astable mode, two resistors and one capacitor establish the oscillation frequency and duty cycle, while the control, trigger, reset, threshold, and discharge pins support the standard 555 application topology. Timing accuracy depends on the external resistor and capacitor tolerances, the device's internal reference behavior, and the operating voltage. Because the trigger input is compared against one-third of the supply voltage and the threshold input is compared against two-thirds of the supply voltage, the timing network sees supply-dependent reference levels. Designers should therefore use stable precision components and avoid high-impedance timing nodes where practical. Typical uses include industrial control pulse generation, relay activation delays, debounce timers, low-frequency oscillators, sensor timeout circuits, and audio-envelope generators. It is also useful in educational and evaluation boards where a simple external-resistor-and-capacitor timing method is preferable to firmware-based timing. For robust layouts, connect the control bypass capacitor close to the control pin, keep the timing capacitor's ground return short, and route the discharge transistor output away from sensitive analog signals. Confirm trigger and reset levels in the selected operating mode because a floating control, trigger, or reset node can produce unintended output transitions. This page combines verified manufacturer and distributor information with pin-level guidance, application fit, comparison parameters, and replacement considerations. It also documents where full electrical limits, qualified pricing, and lifecycle-specific details remain unavailable in the supplied source data.

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MC1455DR2

MC1455DR2 - Programmable Timer Oscillator | onsemi

The onsemi MC1455DR2 is a single 555-type monolithic timing circuit packaged in an 8-pin SOIC. Designed for accurate time delays or oscillation, it supports time-delay operation controlled by an external resistor-capacitor network and provides trigger and reset terminals. The device is described as a direct replacement for NE555 timers and includes adjustable duty-cycle capability. A timer IC is a specialized timing-control device used to create a defined delay, periodic oscillation, or a repeatable pulse sequence. The MC1455 belongs to the 555 timer family, combining analog threshold comparison and switching functions with external timing components. Within the broader semiconductor hierarchy, it is an integrated circuit, timer and oscillator, and ultimately a signal-generation and control component used in industrial, consumer, and instrumentation electronics. The principal functional characteristics are accurate timing, selectable monostable or astable operating behavior, external resistor-capacitor timing control, trigger support, reset support, and adjustable duty cycle. Its timing network remains external, allowing the designer to select resistance and capacitance values according to the required delay or oscillation frequency. The 8-pin SOIC package also supports compact surface-mount PCB construction while exposing the standard timer functions required for trigger, discharge, control, threshold, reset, output, supply, and ground connections. Technically, the MC1455 combines two internal threshold comparators with a flip-flop and discharge transistor. In time-delay mode, the trigger input initiates a timing interval that is controlled by one external resistor and capacitor. In oscillation mode, the threshold and trigger functions cooperate with the external network to produce a periodic output. Additional trigger and reset terminals provide external control, while the control-voltage terminal supports common waveform-shaping and duty-cycle adjustment techniques described in the manufacturer documentation. Typical uses include pulse generation, delayed switching, debounce and one-shot logic, simple clock circuits, tone generation, warning indicators, and control-signal generation. The part is especially appropriate where a compact, standard 555-type interface is preferred over a more complex microcontroller timer or dedicated clock IC. Its external timing network also allows the timing range to be scaled without changing the package or pinout. The principal design consideration is to use the pin-description table and operating limits in the manufacturer datasheet when assigning signal levels, timing-component values, supply conditions, and output drive requirements. Designers should also review the reset and trigger truth behavior, control-voltage biasing, and discharge-node implementation before placing the circuit in a new PCB design. This page organizes the verified MC1455DR2 product information, commercial inquiry path, drop-in alternatives, pin assignment, comparison points, and practical application guidance. It also distinguishes verified package and interface facts from parameters that require confirmation against the manufacturer datasheet before production release.

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MC1455P1G

MC1455P1G - 555 Timer, 4.5-16V, 8-PDIP | onsemi

The onsemi MC1455P1G is a 555-type monolithic timer and oscillator with a 4.5 V to 16 V supply range, housed in an 8-pin PDIP package. It supports accurate time-delay and free-running oscillation functions, with external resistor and capacitor timing components and adjustable duty-cycle operation. Trigger and reset terminals allow the circuit to be initiated or terminated according to the application timing requirements. A 555 timer is a type of timer IC, oscillator IC, and analog integrated circuit used to generate a time-delayed output or periodic waveform without a microprocessor. Within the broader semiconductor hierarchy, the MC1455 belongs to the timer and oscillator category, which sits within clock and timing integrated circuits and analog signal-processing devices. The device provides a simple hardware mechanism for delays, pulse generation, flashing, tone generation, and periodic control. The principal advantages of the MC1455P1G include its direct-replacement positioning for NE555 timers, adjustable duty-cycle capability, separate trigger and reset control, and operation from a single 4.5 V to 16 V supply. Its timing interval is established by one external resistor and capacitor in monostable mode, while astable operation adds the resistor and capacitor connections required to set frequency and duty cycle. These features make the circuit useful in designs where a dedicated timer simplifies control logic. Internally, the MC1455 uses comparator and switching functions to control its discharge, output, trigger, and reset behavior. In monostable operation, a trigger pulse starts one controlled timing interval and then returns the output to its inactive state. In astable operation, the output oscillates continuously, with frequency and duty cycle determined by the external timing network. The manufacturer describes the MC1455 as a highly stable monolithic timing controller, while its trigger and reset terminals support externally controlled operation. Typical uses include LED flashers, interval timers, pulse generators, industrial control timers, switch debounce circuits, simple audio oscillators, and embedded control systems requiring a repeatable hardware timing event. Because the MC1455P1G is a through-hole PDIP device, it is particularly suitable for prototyping, educational assemblies, legacy industrial equipment, and repair designs where a socketed DIP implementation simplifies maintenance. For new layouts, preserve the standard 8-pin timer interface and place timing components close to the relevant pins to reduce parasitic effects. Check trigger and reset pulse timing, discharge-device current, and output-load conditions before finalizing the circuit. A bypass capacitor near the supply pin is recommended when the long timing interval and high timing accuracy required by the design are important. This product record combines manufacturer functional information, package and supply details, cross-reference candidates, and practical design guidance. It also distinguishes verified device attributes from electrical parameters that still require confirmation in the manufacturer datasheet, helping engineers plan a replacement without overlooking timer behavior, package compatibility, or application-level constraints.

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MC14578P

MC14578P - CMOS Micro-Power Comparator + Voltage Follower | NXP Semiconductors

The NXP Semiconductors MC14578P is a CMOS analog building block that integrates a very-high-input-impedance comparator, a voltage follower, and four enhancement-mode MOSFETs (N-channel and P-channel pairs) on a single die, housed in a 16-pin PDIP (DIP-16) through-hole package. The MC14578 is a micro-power comparator with integrated voltage follower. An LDO (Low-Dropout) linear regulator maintains a stable output voltage, but the MC14578 belongs to a different category - it is a CMOS analog comparator designed for ultra-low-power signal conditioning in battery and line-powered applications. The integrated voltage follower allows monitoring the noninverting input of the comparator without loading the source, which is critical in high-impedance sensor interfaces where the comparator would otherwise distort the signal. The four on-chip MOSFETs (two N-channel and two P-channel) provide design flexibility for level shifting, switching, or simple analog front-ends around the comparator output. Key features include the analog building-block topology that combines comparator, follower, and discrete MOSFETs on one chip, an extremely low quiescent current suitable for battery-powered designs, a CMOS process that delivers very high input impedance, and a single-supply operation that simplifies integration with digital logic. Architecture-wise, the device uses a CMOS process that delivers very high input impedance on the comparator inputs and very low quiescent current consumption, a specification critical for battery-powered designs such as smoke detectors that must operate for years on a single 9V cell. The four co-integrated MOSFETs are positioned as auxiliary building blocks, allowing the designer to build simple transistor circuits around the comparator without external discretes. The combination of the high-impedance follower buffer and on-die MOSFETs is unusual in this package class and is the main architectural reason the part has been a long-term staple in low-cost smoke-detector and sensor-interface designs. Typical applications include line-powered smoke detectors, threshold detectors, liquid/moisture sensors, low-battery detectors, CO detectors and micro interfaces, and pulse shapers. The on-chip MOSFETs simplify typical battery-operated detector front-ends that otherwise would require several discrete transistors. One key design consideration: the on-chip MOSFETs have limited drain current and should not be used as primary power switches - they are sized as signal-path elements. Engineers should review the datasheet's continuous-drain current rating before driving relays or LEDs directly off these transistors. This page synthesizes distributor stock data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet itself.

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MC1458D

MC1458D - Dual 1MHz Op Amp, ±15V, 8-SOIC | Texas Instruments (Tape & Reel)

The Texas Instruments MC1458D 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 MC1458D 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 MC1458D 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 MC1458D 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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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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Subcategorias

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MC145572PBR2 - ISDN U-Interface Transceiver | NXP | 44-LQFP

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MC1458D - Dual 1MHz Op Amp, ±15V, 8-SOIC | Texas Instruments (Tape & Reel)

MC1458DE4 - Dual 1 MHz Op Amp | Texas Instruments

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

MC1458DT - High-Performance Dual Op Amp | STMicroelectronics

MC1458ID - Dual High-Performance Operational Amplifier | STMicroelectronics

MC1458IN - Dual High-Performance Op Amp | STMicroelectronics

MC1458N - Dual High-Performance Op Amp | STMicroelectronics

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

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

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

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