מעגלי מגבר
מוצרים (1,100+)
AMC1300DWVR - ±250mV Reinforced Isolated Amplifier | Texas Instruments
The Texas Instruments AMC1300DWVR is a precision isolated amplifier that outputs a differential signal separated from its input side by a reinforced galvanic isolation barrier, offered in an 8-pin SOIC (DWV) wide-body package. The device accepts a differential input of ±250 mV and delivers a differential analog output with a fixed gain of 8.2, achieving ±0.3% (max) gain error and 1 mV input offset over its full operating range. Its isolation barrier is certified to VDE V 0884-11 and UL1577, providing reinforced isolation up to 5 kV RMS and a working voltage that suits motor drive, solar inverter, and grid-tie current-sensing stages. An isolation amplifier (also called an isolated current-sense amplifier) is a specialized analog component that combines a precision front-end amplifier with an integrated galvanic isolation barrier, allowing high-side shunt-resistor voltages to be measured safely from a low-voltage MCU or ADC domain. The category signal used for these parts sits inside the broader isolation IC family, which also includes digital isolators and isolated gate drivers, and the broader signal-chain hierarchy: isolation amplifier → instrumentation amplifier → op amp → analog IC. This positions the AMC1300 as a bridge between power-side analog signals and safety-isolated low-voltage digital control. Key features of the AMC1300DWVR include a 200 kHz small-signal bandwidth, 80 dB common-mode transient immunity (CMTI), ±1 µV/°C typical offset drift, and a low-side 3.3 V or 5 V single-supply operation. The fixed-gain architecture eliminates external resistor matching, while the integrated DC/DC-converter-friendly low-side supply simplifies BOM. The reinforced isolation barrier is implemented using TI's silicon-oxide (SiO2) capacitive isolation technology, providing long-term reliability and immunity to magnetic interference that would couple into opto-isolator or transformer alternatives. Typical applications include phase-current feedback for motor drives, DC-bus current sensing in solar inverters and string inverters, isolated voltage and current monitoring in grid-tie energy storage, EV traction inverter phase monitoring, and isolated analog front-ends for PLCs and industrial servo amplifiers. The ±250 mV linear input range is sized for standard 1 mΩ to 10 mΩ shunts, while the differential output drives a delta-sigma ADC such as the ADS131A04 or a SAR ADC with input common-mode flexibility. When designing with this device, ensure an isolated DC/DC converter powers the high-side input stage; the AMC1300 cannot generate its own high-side supply. Also confirm the local creepage/clearance on the PCB satisfies end-equipment IEC 61800-5-1 or IEC 60950 reinforced isolation rules. (page: 2026-10-06) This page synthesizes distributor inventory, fixed-gain alternatives, and isolation-barrier design notes that go beyond the bare datasheet.
AMC3330DWER - ±1V Reinforced Isolated Amplifier | Texas Instruments
The Texas Instruments AMC3330DWER is a precision, ±1-V input, reinforced isolated amplifier with an integrated isolated DC/DC converter, packaged in a 16-pin SOIC (DWE) wide-body package with 5 kV RMS reinforced isolation per IEC 60747-17. The device combines a differential input front-end optimized for high-impedance voltage sensing with a 2nd-order sigma-delta modulator followed by a digital isolation barrier and a single-ended analog output, providing a fixed differential gain of 2.0. An isolated amplifier (also called an isolation amp or iso-amp) is a specialized analog IC that uses an internal galvanic isolation barrier - typically based on capacitive or transformer coupling - to transmit an analog signal across a high-voltage domain while rejecting common-mode transients. Within the broader power-management signal-chain hierarchy, isolated amplifiers sit between the high-voltage sensing node (shunt resistor, resistor divider, or transducer) and the low-voltage controller (MCU, ADC, DSP), making them a subcategory of special-purpose amplifiers that bridges signal conditioning and functional safety. The AMC3330 belongs to TI's AMC33xx family of reinforced isolated amplifiers and is targeted at high-voltage system monitoring. Key features include ±1 V differential input range with 1.2 MΩ input impedance optimized for direct connection to high-impedance resistor dividers, ±0.2% maximum gain error, ±45 ppm/°C maximum gain drift, 86 dB minimum DC common-mode rejection ratio (CMRR), and a low-side single 3.3 V or 5 V supply thanks to the on-chip isolated DC/DC converter. A diagnostic output and fault-detection pin simplify system-level design, while the wide-body SOIC-16 (DWE) package provides >8 mm creepage/clearance for reinforced insulation. Architecturally, the AMC3330 integrates a 2nd-order sigma-delta modulator clocked internally, a digital isolation channel based on TI's capacitive SiO2 barrier technology, and an integrated flyback-style DC/DC converter that powers the high-side input circuitry from the low-side 3.3 V/5 V supply. The output is a differential analog voltage proportional to the differential input times the fixed gain of 2.0, with bandwidth and noise performance optimized for voltage (rather than current) sensing. Typical applications include high-voltage bus voltage monitoring in solar inverters, EV traction-inverter DC-link sensing, industrial motor-drive DC-bus measurement, UPS and battery-management system (BMS) voltage monitoring, and any precision non-ground-referenced voltage measurement where reinforced isolation is mandated by safety standards. The high input impedance eliminates the need for a high-side buffer op-amp, simplifying BOM. When designing with this device, place the sense resistor divider close to the INP/INN pins and keep the layout of both connections symmetrical to preserve CMRR. Decoupling capacitors must be placed as close as possible to the supply pins, and the low-side ground reference must be solid to avoid ground-loop noise coupling into the analog output. Because the device operates from a single low-side supply, no isolated bias supply is needed - this is a major BOM-saving advantage over discrete isolated-amplifier designs. This page synthesizes distributor pricing, drop-in same-brand and cross-brand pin-compatible alternatives, application guidance, and practical design notes not found in the manufacturer datasheet alone.
BA728N - Dual Op-Amp, 3-18V, Single Supply | ROHM
The ROHM BA728N is a dual independent operational amplifier IC featuring internal phase compensation, designed for general-purpose analog signal conditioning. The device integrates two op-amps in an 8-pin SIP package (Single In-line Package), with each amplifier providing standard open-loop gain, internal compensation, and a wide common-mode input range that includes the negative rail when powered from a single positive supply. What is a dual operational amplifier? A dual operational amplifier (dual op-amp) is an integrated circuit that combines two independent op-amp channels in a single package, sharing only the power and ground pins. Dual op-amps belong to the linear IC family, which itself sits within the broader category of analog signal-conditioning semiconductors. They are fundamental to almost every analog PCB, providing gain, buffering, filtering, and comparison functions at low cost and low power. Key features of the BA728N include: a single-supply operating voltage of 3V to 18V (or dual ±1.5V to ±9V), low power consumption typical of the BA728 family, pin configuration identical to the industry-standard 8-pin general-purpose op-amp outline, internal phase compensation (no external compensation capacitor required), and high common-mode input range that includes the negative supply rail when used in single-supply mode. The internal architecture is a classic bipolar transistor design with on-chip frequency compensation, eliminating the need for external compensation capacitors. This makes the BA728N a true drop-in functional equivalent to legacy 8-pin dual op-amps such as the LM358 / NJM4558 / BA4558 family, with the same DC characteristics but at a lower quiescent current and with ROHM's signature wide single-supply range. Typical applications include active filters, transducer signal conditioning, comparator circuits, DC gain blocks, audio pre-amplifiers, and general-purpose analog signal chains in consumer, industrial, and hobby electronics. Its pin-compatibility with the BA728 / BA728F variants (which differ only in mechanical package) allows designers to substitute across mechanical configurations without PCB changes. When designing with the BA728N, observe the absolute maximum supply rating of 18V (single supply) or ±9V (dual supply), place a 0.1 µF decoupling capacitor close to VCC+ pin, and avoid output short circuits to ground or either rail. The exposed lead frame (SIP package) limits mounting to through-hole assemblies only. This page synthesizes datasheet specifications, distributor pricing (as of 2026-10-05), pin-compatible alternatives, and practical design notes to help engineers select and apply this dual operational amplifier.
BD3401KS2 - 2-Channel Audio Signal Processor | ROHM
The ROHM Semiconductor BD3401KS2 is a 2-channel audio signal processor with a built-in preamplifier for tape recording and playback, supplied in a 64-pin SQFP package measuring 12 x 12 mm. It operates from an 8 V to 9.5 V supply and is designed for compact analog audio systems requiring integrated recording, playback, and signal-processing functions in one package. The BD3401KS2 also appears in the BD3401KS2/BD3402KS2 family data, indicating a closely related device family for audio applications. An audio signal processor is an application-specific analog integrated circuit that conditions, controls, and routes audio signals. In the broader semiconductor hierarchy, it is an audio amplifier IC within integrated circuits and signal-processing semiconductors. Unlike a general-purpose operational amplifier, this device combines multiple functions associated with tape recording and playback, reducing the number of separate ICs required in a cassette-oriented signal chain while preserving a defined pin and function architecture. The verified device information identifies the BD3401KS2 as an audio audio-signal processor with 2 channels and a surface-mount 64-LQFP package. Its microphone input is associated with pins 59 and 60, while the output is associated with pins 32 and 33 under the stated ALC-off condition. The manufacturer data also identifies maximum output voltage and gain specifications for the processing sections, including up to 2.5 Vrms maximum microphone output and distinct output-gain ranges for the two output paths. Typical engineering uses include cassette and tape-deck playback channels, tape recording paths, microphone preamplification, stereo audio processing, and compact consumer-audio equipment. The single-supply architecture and integrated preamplifier make the IC relevant to designs where analog audio conditioning is required without deploying a collection of separate amplifiers and control devices. Exact input impedance, noise, frequency response, control-voltage ranges, and absolute maximum ratings must be confirmed against the manufacturer datasheet before layout or production use. In a practical design, the analog signal path should be laid out with short, shielded routes for microphone and tape inputs, while supply and ground connections should use low-impedance planes. Decoupling capacitors should be placed directly beside the relevant supply pins, and output routing should avoid proximity to digital control traces. Because the part is associated with tape recording and playback, component tolerances and noise behavior can materially affect hiss, gain consistency, and channel balance. This product summary combines the verified package, channel, supply, function, pin-fragment, and performance data with application-focused engineering guidance. It also clearly separates verified facts from parameters that still require confirmation from the full ROHM datasheet, reducing the risk of basing a new PCB or production BOM on incomplete web excerpts.
BD3402KS2 - 2-Channel Audio Signal Processor | ROHM Semiconductor
The ROHM Semiconductor BD3402KS2 is a 2-channel analog audio signal processor for home-audio cassette recording and playback, with a built-in preamplifier, single-power-supply operation from 8 V to 9.5 V, and a 64-pin SQFP-T package measuring 12 mm by 12 mm. An audio sound processor is an analog integrated circuit that conditions two audio channels and adds functions such as surround and bass boost. It belongs to the broader audio-processing hierarchy of sound processors, audio amplifiers, interface ICs, and power-management semiconductors. In cassette equipment, the built-in preamplifier reduces the external circuitry required around the recording and playback signal path. The BD3402KS2 supports two audio channels from one 8 V to 9.5 V supply. Its 2-wire interface allows a control system to select or configure supported operating functions. According to the ROHM product information, the associated processor family provides surround and bass-boost functions with soft switching intended to reduce shock noise during mode changes. A dedicated digital-circuit power-supply terminal helps maintain internal IC state with low standby current. The device integrates multiple analog audio functions in one package. Its preamplifier is designed for cassette recording and playback, while the surround and bass-boost sections support consumer-audio signal shaping. Soft switching is an important implementation feature because abrupt mode transitions in audio systems can create an audible transient. The two-channel architecture also allows coordinated processing of left and right program material. Typical uses include cassette-deck record and playback circuitry, compact home-audio systems, analog stereo equipment, and legacy consumer-audio designs requiring a dedicated audio signal processor. The 12 mm by 12 mm SQFP-T package requires a multilayer PCB with fine-pitch routing and careful thermal management, so the availability of exact schematic, footprint, and pin-assignment data is critical before a replacement is approved. Design work should verify the complete pinout, recommended application circuit, external resistor and capacitor values, control timing, and thermal requirements against the manufacturer datasheet. Because the BD3402KS2 is identified as obsolete in the supplied product data, engineers should also confirm whether new production is possible and whether an authorized manufacturer-supported alternative exists for the original design. This page consolidates the verified manufacturer and distributor information, exposes missing datasheet-dependent values rather than estimating them, and organizes sourcing, application, and design guidance for engineers evaluating the BD3402KS2.
BD3427K-BJ Audio Channel IC, 44-LQFP | ROHM Semiconductor
The ROHM Semiconductor BD3427K-BJ is a single-channel audio processing IC supplied in a 44-pin LQFP package. It is categorized by distributors as an Audio Special Purpose device, placing it within the broader integrated-circuit hierarchy of audio ICs and amplifier ICs. The verified product information confirms the exact MPN, ROHM Semiconductor branding, 44-pin LQFP construction, tray packaging, and RoHS3 compliance. Its key applications involve processing or supporting one audio channel in compact consumer and industrial audio equipment. An audio-channel IC is a specialized semiconductor that manages one channel of an audio signal path. Depending on its internal architecture and external configuration, such a device may provide decoding, amplification, filtering, conversion, or interface functions. The supplied distributor records classify the BD3427K-BJ as an Audio Channel device rather than a general-purpose op-amp or power amplifier, so its internal architecture and exact signal-processing functions should be confirmed in the manufacturer datasheet before schematic capture. The most clearly documented physical characteristics are the 44-LQFP package and tray packaging. A 44-pin LQFP is a surface-mount quad flat package that supports a comparatively dense connection interface on a compact PCB. The exposed lead arrangement accommodates power, ground, control, and signal connections, although the verified data does not provide the pin names, electrical ratings, operating limits, or application circuit required to document those functions accurately. ROHS3 compliance is explicitly reported for the BD3427K-BJ, making it suitable for applications whose procurement requirements include restriction of hazardous substances. The available records do not establish REACH status, AEC-Q100 qualification, halogen-free status, conflict-minerals compliance, operating-temperature range, supply voltage, channel performance, or output-power capability. Those values remain intentionally uncharacterized rather than inferred from the device category. Typical design uses include multichannel audio systems in which one BD3427K-BJ supports each channel, consumer audio equipment, industrial sound equipment, and compact communication products. Because the verified data does not identify the device's exact internal signal path, engineers should use the manufacturer datasheet to confirm whether it supports analog amplification, digital decoding, filtering, or another function. This verification is essential before assuming that it can directly drive a loudspeaker or accept a particular digital audio format. PCB design should reserve all 44 package positions and verify the pinout against the current ROHM Semiconductor datasheet before routing. Keep power and ground connections short, place required bypass components at their designated pins, and preserve the manufacturer's recommended land pattern. Do not substitute a generic 44-LQFP footprint without checking body size, pitch, pin numbering, and any exposed thermal-pad requirements. This product record consolidates verified distributor inventory, exact package information, RoHS3 status, sourcing links, and clearly bounded engineering guidance. It also distinguishes confirmed facts from missing technical data, helping designers avoid unsupported assumptions about performance, pin compatibility, and substitute devices.
BD3427K-E2 - Audio Special Purpose IC | ROHM Semiconductor
ROHM Semiconductor BD3427K-E2 is an audio special-purpose integrated circuit identified in distributor data as an audio amplifier IC, supplied in a 44-LQFP package and offered in tape-and-reel packaging. The available verified information confirms its manufacturer, MPN, category placement, package format, reel packaging, component status references, and a representative distributor price of $2.9084 per unit. Detailed electrical characteristics, internal functions, pin assignments, power requirements, output configuration, and application-specific operating limits are not present in the supplied source excerpts, so those values remain marked as data needed rather than being inferred. What is an audio special-purpose IC? An audio special-purpose IC is an integrated circuit designed for a defined audio-signal task rather than a general-purpose analog or digital function. Within the broader product hierarchy, it belongs to the amplifier IC and audio signal-processing categories, which are part of integrated circuits used in audio systems. The BD3427K-E2 is specifically listed under Audio Special Purpose and Audio Channel classifications in verified distributor information. The key verified product features are the 44-LQFP package, tape-and-reel packaging, ROHM Semiconductor branding, and availability references from multiple distributors. One distributor listing identifies the package as 44LQFP and provides a unit price of $2.9084. Another distributor describes the part as ROHS3 compliant, while additional listings report quantities of 4,359 and 32,800 units. These observations should be confirmed against the manufacturer datasheet and current authorized-distributor inventory before design release. The part is relevant to audio-channel designs where a dedicated audio IC, compact surface-mount construction, and distributor availability are important. Because the supplied excerpts do not expose the internal block diagram, signal path, channel count, power-supply voltage, control interface, or thermal characteristics, engineers should treat it as an obsolete or legacy sourcing candidate until those parameters are independently confirmed. The main design consideration is not to assume generic audio-amplifier compatibility from the package name alone. Pin mapping, exposed-pad requirements, supply sequencing, output load, and thermal performance must be matched to the manufacturer documentation. This page distinguishes verified observations from missing technical data and avoids presenting unsupported electrical claims as facts. This page combines the supplied distributor records, package information, pricing reference, sourcing observations, and a structured verification checklist. It is intended to support initial BOM research while directing engineers to the authoritative manufacturer documentation for final qualification.
BD3429K-E2 Audio Channel IC, 44-Pin QFP | ROHM Semiconductor
ROHM Semiconductor BD3429K-E2 is an audio-channel integrated circuit offered in a 44-pin QFP package for surface-mount PCB integration. The supplied product listings identify it as an “Audio Channel” device and classify it under Audio Special Purpose ICs. Its complete electrical ratings, supported audio formats, operating voltage, output configuration, clock requirements, and signal-processing architecture are not included in the verified excerpts, so no unsupported performance figures are asserted here. An audio-channel IC is a specialized integrated circuit used to receive, decode, convert, reproduce, or route audio signals within an electronic system. Its broader hierarchy is audio IC → audio-channel IC → Audio Special Purpose IC → semiconductor. This classification places the BD3429K-E2 in the signal-processing portion of a multimedia system rather than in a generic operational amplifier or power-management category. The verified listing confirms three defining implementation facts: the BD3429K-E2 belongs to ROHM Semiconductor, its production status is reported as Active, and its enclosure is a QFP with 44 pins. One distributor record further identifies the physical format as 44-LQFP. The supplied data does not expose the complete pin map, exposed-pad arrangement, electrical limits, or analog performance, so engineers should confirm those items in the manufacturer datasheet before schematic capture or PCB release. The -E2 ordering suffix is present in the exact manufacturer part number used by distributor databases. Its meaning cannot be inferred from the supplied excerpts because no ordering-information table was provided. Likewise, the data does not establish whether the suffix denotes a temperature grade, packing configuration, production revision, or another ordering attribute. The base family member BD3429K appears in the verified listings, but equivalence of its ordering codes cannot be confirmed from the supplied text. The most plausible application areas are embedded audio systems, consumer-audio equipment, and digital audio processing platforms where a dedicated audio-channel IC is required. However, the verified excerpts do not name specific end applications or reference designs. Before selecting this device, engineers should verify its supported sample rates, codec interfaces, analog inputs and outputs, control interface, clocking, and supply requirements against the complete manufacturer datasheet. The principal PCB-design consideration is that the 44-pin QFP requires fine-pitch routing and careful assembly planning. Because pin names, dimensions, pitch, and the exposed-pad configuration are unavailable in the verified excerpts, land-pattern selection should be based on the official package drawing rather than inferred from the generic “QFP44” description. Pin and solder-mask designators should also be checked against the exact -E2 ordering code. This page consolidates the verified distributor and Octopart listings, distinguishes known device facts from missing technical data, and avoids presenting speculative electrical specifications or unverified drop-in replacements as confirmed engineering information. It also records the supplied datasheet, distributor, and comparison-tool sources for engineers who need to complete footprint, pinout, pricing, and lifecycle verification.
BD3433K-E2 - 6-Channel Audio Volume Control IC | ROHM
ROHM Semiconductor BD3433K-E2 is a six-channel electronic volume control IC for 5.1-channel car-theater audio systems, operating from a 44-QFP 10 x 10 mm surface-mount package. Its VCC supply range is 7.0 V to 9.5 V, its VEE supply range is -9.5 V to -7.0 V, and its typical total harmonic distortion is 0.001%. The device also provides 106 dB typical crosstalk between channels, 2.5 uVrms typical output noise voltage, and 2 uVrms typical residual output noise voltage. An electronic volume control is an audio signal-processing IC that controls signal amplitude electronically rather than through a conventional mechanical potentiometer. Within the broader product hierarchy, it is an audio special-purpose IC and a signal-conditioning device within the semiconductor category. Its primary role is to provide programmable, soft-switching gain control while preserving low distortion and channel separation across a multichannel home or vehicle audio system. The BD3433K-E2 integrates a six-channel input selector with independently controlled front and rear selection, input gain amplification, six-channel independently controlled electronic volume, and output gain amplification for two output lines. It also supports differential input for monophonic signals and soft-switching operation. The stated maximum input voltage is 4.25 Vrms typical, allowing the device to operate within the signal range used by the target 5.1-channel audio architecture. The 106 dB typical crosstalk specification indicates strong isolation between the six processing channels, while the 0.001% typical THD specification identifies the device as suitable for precision multichannel audio signal paths. Low output and residual output noise values are important where channel-level noise can affect quiet passages. Independent front and rear control also supports systems requiring separate adjustment of main and surround-speaker channels rather than a single linked volume control. Typical uses include 5.1-channel car-theater systems, automotive head units, home-theater preamplifiers, surround-sound processors, and multichannel audio switching networks. The positive VCC and negative VEE supplies support a bipolar signal environment, while the six independent volume paths map directly to front-left, front-right, center, surround-left, surround-right, and subwoofer channel organization. Designers should preserve the negative and positive supply rails required by the device and verify that the external source and load networks remain within the documented signal limits. The QFP package also requires careful thermal and layout planning because audio and automotive equipment may operate in elevated ambient temperatures. Exact pin names, decoupling requirements, and application-circuit values require confirmation against the manufacturer datasheet. This page consolidates the verified distributor description, datasheet-hosted electrical specifications, availability information, and application-focused engineering guidance. It also distinguishes documented performance from unverified substitution claims, providing a more useful basis for component selection, PCB planning, and sourcing BD3433K-E2.
BD3451KS - Dual Automotive High-Side Switch IC | ROHM
The ROHM BD3451KS is an automotive audio special-purpose IC identified by distributor listings as a dual high-side switch IC with diagnostic functions for automotive applications. Other catalog records classify the device as an 8-channel sound processor, while the DigiKey record identifies it within the Audio Special Purpose category. The available verified information confirms its automotive audio and switching role but does not provide a manufacturer datasheet URL, electrical limits, timing values, complete pinout, or ordering information. The KS package is referenced by one distributor listing as 100SQFP, but the exact dimensions, exposed-pad arrangement, and pin numbering remain unavailable in the supplied records. An automotive high-side switch IC is a semiconductor interface that controls a load connected to a positive supply rail while monitoring circuit conditions for fault detection. Diagnostic functions can allow a vehicle controller to identify open, short, or abnormal load states. In a sound system, such an IC may combine output switching with channel-level control, helping protect downstream audio circuitry and report faults to a larger control system. The supplied 8-channel sound-processor description further indicates a role in multi-channel automotive audio signal management. The BD3451KS therefore belongs to the functional hierarchy of automotive integrated circuit, specifically a high-side switch with diagnostic functions and sound-processing characteristics. Its key advantage is integration: switching, channel handling, and fault monitoring are combined in one package rather than implemented through separate discrete drivers and protection networks. This can simplify PCB allocation and firmware coordination, although the available evidence does not establish whether the IC drives speakers directly or controls intermediate audio power stages. The verified catalog information does not state the operating voltage, output-current limit, channel configuration, diagnostic thresholds, slew rate, quiescent current, thermal resistance, or automotive qualification status. Those values must be taken from the official ROHM datasheet before power-loss calculations, protection design, or PCB implementation. The 100SQFP package reference also requires verification of body size, lead pitch, thermal-pad dimensions, and exposed-pad connectivity. Distributor category labels should not be treated as a substitute for those electrical and mechanical details. Potential uses include automotive high-side audio-output control, protected connection of powered audio loads, eight-channel sound management, diagnostic monitoring of external amplifier or speaker interfaces, centralized vehicle audio routing, and ECU-integrated audio control. These applications follow directly from the supplied descriptions of a dual high-side switch IC with diagnostics and an 8-channel sound processor. They do not imply that the BD3451KS directly delivers loudspeaker power, because no output-drive capability is confirmed in the verified records. Design review should begin with a complete ROHM pinout and application-circuit comparison. Engineers should verify absolute maximum ratings, logic thresholds, fault behavior during reset, diagnostic timing, short-circuit response, thermal limits, and whether the exposed pad must be connected to ground or another rail. A valid layout also needs short, low-impedance supply paths and careful handling of output inductive loads to prevent excessive voltage excursions. This page separates confirmed catalog facts from unverified technical attributes and combines distributor availability information with practical selection guidance. Because the supplied data contains no confirmed drop-in substitute, this product record does not present unverified cross-brand parts as pin-compatible alternatives. Obtain the official ROHM datasheet before ordering, footprint approval, or production release.
BD3461FS-E2 - 6-Channel Audio Volume Control IC | ROHM Semiconductor
The ROHM Semiconductor BD3461FS-E2 is a 6-channel electronic volume control IC with built-in advanced switch functionality, supplied in a 24-pin SSOP-A package. It is designed for general-purpose audio systems requiring multiple channel volume adjustment, external sound mixing, and efficient audio signal routing. The device operates from a 7 V to 9.5 V supply according to the verified distributor listing, while its I2C interface supports controlled adjustment of six audio channels from a host processor. The BD3461FS-E2 is categorized as an audio volume control IC and is intended for portable audio equipment, car navigation systems, and other multi-channel sound products. Its integrated advanced switch allows audio sources to be mixed through the volume-control function rather than requiring a separate switching stage in every design. An electronic volume control IC is a type of analog audio processor that adjusts signal amplitude using internal attenuator and control circuitry. The BD3461FS belongs to the broader audio processor hierarchy: electronic volume controller, audio signal-path IC, analog audio IC, and ultimately semiconductor. This makes it more specialized than a general-purpose operational amplifier. Instead of amplifying a signal directly for a loudspeaker, the BD3461FS controls the level presented to downstream amplifiers while providing channel selection and source-mixing flexibility. Its built-in advanced switch is particularly useful when the product must combine multiple audio sources, such as music playback and navigation guidance, into a common output path. The verified product information identifies the BD3461FS-E2 as a 6-channel device with I2C bus control and a 7 V to 9.5 V operating supply range. Its 24-SSOP-A package provides a surface-mount implementation for compact audio equipment. The general-purpose electronic-volume description and integrated switching function distinguish it from simple fixed attenuators. Engineers can use the I2C control path to integrate volume changes into a system controller rather than relying on mechanical potentiometers. The device is also suitable for external sound mixing in the favorite channel, a feature specifically described for portable audio and car navigation guide-sound applications. The BD3461FS-E2 is marked by ROHM as “Not Recommended for New Designs,” meaning that it cannot be used for new designs or design diversion. Existing equipment may still use the part for repair or maintenance, but new product development should use a currently recommended audio-processing solution. The available pricing is approximately $5.4110 per unit at the referenced distributor listing, as of 2026-10-30. Volume pricing, complete lifecycle timing, and detailed electrical limits were not included in the verified data, so those values require confirmation from ROHM or an authorized distributor before committing a production order. Typical applications include multi-zone audio systems, portable media devices, automotive navigation audio, navigation prompt mixers, and other products that need independent level control for several sound channels. In an automotive navigation system, the advanced switch can combine a music source with navigation announcements through the designated favorite channel. The I2C interface permits the host controller to change levels during system operation, while the 24-SSOP-A package supports automated PCB assembly. Designers should still confirm the complete application circuit, external component requirements, signal levels, and timing behavior against the manufacturer datasheet. The principal design consideration is lifecycle risk. Because ROHM explicitly states that BD3461FS-E2 is not recommended for new designs, engineers should treat it as a maintenance or legacy-platform component rather than a default choice for new consumer products. For an existing board, verify the exact package, pinout, supply voltage, I2C address and electrical timing, and audio-path configuration before substitution. For new equipment, request an active ROHM alternative or redesign the audio subsystem around a currently supported device, because a distributor listing or cross-reference result alone does not prove pin-to-pin compatibility. This page combines verified ROHM product status, distributor descriptions, the available price and package information, same-family alternatives, and practical selection guidance. It distinguishes confirmed technical facts from parameters that still require datasheet review, helping engineers compare the BD3461FS-E2 without treating generic cross-reference results as guaranteed drop-in replacements.
BD3465FV-E2 4-Channel Audio Volume Controller | ROHM Semiconductor
The ROHM Semiconductor BD3465FV-E2 is a general-purpose four-channel electronic volume controller with a built-in advanced switch, supplied in a 20-pin SSOP-B package. It is designed for audio-volume control applications and uses an I2C bus for control, with the verified distributor description identifying four output channels and a 7 V to 9.5 V operating supply range. The device is intended for systems requiring independent or grouped attenuation of multiple audio signal paths. An electronic volume controller is an audio signal-chain IC that adjusts signal amplitude in the analog domain while leaving the source and destination circuitry largely unchanged. In the broader product hierarchy, the BD3465FV-E2 belongs to the audio special-purpose IC category, combining volume control and switching functions in a single integrated circuit. This integration can reduce the number of discrete controls and simplify system-level audio routing in multi-channel equipment. The key verified feature set includes four-channel volume control, a built-in advanced switch, I2C control, a 20-SSOP-B package, and a stated supply range of 7 V to 9.5 V. The operating temperature range reported by LCSC is -40°C to +85°C. The product is identified by ROHM as “Not Recommended for New Designs,” so it should be considered for existing designs, controlled design diversion, or legacy supply rather than selected for a new platform without qualification. The BD3465FV-E2 is categorized by DigiKey as an Audio Special Purpose IC and by Mouser as an audio processor or audio special-purpose device. Its integrated switch function can be useful when an audio system needs to route or isolate several channels while maintaining central volume control. The exact gain range, channel-to-channel attenuation behavior, control-register map, recommended application circuit, and detailed electrical limits are not present in the supplied verified excerpts and are therefore not asserted here. Typical legacy applications include multi-channel consumer audio, audio processing modules, powered speakers, home-entertainment equipment, and other systems using an I2C-controlled volume stage. Designers should verify the complete manufacturer datasheet before finalizing a replacement, particularly the supported input/output signal range, bypass behavior, switch configuration, decoupling requirements, and timing of the I2C interface. The principal design consideration is lifecycle status. Because ROHM marks the device as not recommended for new designs, engineers should preserve the existing footprint and pinout where possible, confirm that distributor inventory is traceable, and avoid changing the surrounding application circuit without reviewing the full datasheet. This page synthesizes the verified product status, distributor descriptions, pricing excerpts, package information, and practical sourcing guidance for engineers evaluating BD3465FV-E2.
BD34705KS2 - 8-Channel 7.1ch Audio Processor | ROHM
ROHM Semiconductor BD34705KS2 is an 8-channel, 7.1-channel surround-sound processor with built-in micro-step volume, a 6.5 V to 7.5 V supply range, and a 64-pin SQFP package. It is designed to provide independent volume control for eight audio channels, allowing a complete surround-sound signal path to be managed by one dedicated audio processor. An audio processor is a specialized integrated circuit that adjusts, routes, or conditions multiple audio channels according to control signals and system settings. Within the broader product hierarchy, the BD34705KS2 is an audio signal processor, then an audio IC, then a mixed-signal semiconductor used in consumer audio equipment. Its multi-channel architecture reduces the need for separate external volume-control stages when implementing 5.1-channel or 7.1-channel playback systems. The most prominent feature is the built-in micro-step volume system. ROHM states that micro-step volume reduces switching pop noise during volume attenuation, which is valuable when channel-level changes must occur smoothly in home theaters, audiovisual receivers, active speakers, and automotive infotainment systems. The independent eight-channel volume structure also supports separate front-left, front-right, center, rear-left, rear-right, and additional surround channels. The device operates from a stated 6.5 V to 7.5 V supply range. This range places it in powered audio-system equipment where a regulated 7.5 V rail is already available and where low-level audio signals can be routed into the processor. Its 64-SQFP package provides a compact surface-mount implementation, although the exact pin names and electrical limits require confirmation from the manufacturer datasheet. Typical applications include 7.1-channel home-theater systems, surround-sound audio processors, multi-zone entertainment equipment, powered speaker control, and other multichannel audio products. The processor can reduce external volume-control component count while providing coordinated attenuation across eight channels, reducing the risk of mismatched level changes and associated audible transients. Designers should confirm the supported input and output signal format, control interface, clocking requirements, decoupling, and exposed-pad connection from the manufacturer datasheet before layout. The 6.5 V to 7.5 V operating range also requires a regulator with adequate headroom and low noise. Placement near the audio signal paths can reduce sensitivity to interference, but analog and digital return paths still need careful grounding. This product page combines verified manufacturer and distributor information with application guidance, pricing context, package details, and a strict assessment of available drop-in alternatives. It also distinguishes documented capabilities from electrical parameters that still require datasheet verification, helping engineers make sourcing and design decisions without unsupported assumptions.
BD3805F-E2 Car Audio Sound Processor | Rohm Semiconductor
The Rohm Semiconductor BD3805F-E2 is a dedicated car-audio sound processor IC identified by distributor listings under the Audio Special Purpose category. The verified product data describes it as an SCF built-in sound processor for car audio and identifies the -E2 variant as a 22-pin SOP device supplied in tape-and-reel packaging. It is intended for automotive audio systems that require a dedicated signal-processing function rather than a general-purpose audio amplifier. An audio sound processor is an application-specific integrated circuit that processes audio signals inside a vehicle infotainment or head-unit platform. Within the broader semiconductor hierarchy, it belongs to the audio special-purpose IC family, which sits alongside audio amplifiers, codecs, DSPs, and interface ICs. Its exact internal processing functions and electrical limits must be confirmed against the Rohm manufacturer datasheet before schematic capture or firmware configuration. The BD3805F-E2 is specifically associated with car-audio sound processing. The verified distributor listings place it among sound-processor and car-audio amplifier products, while an archived BD3805F datasheet describes the base device as an SCF built-in sound processor for car audio. This makes the part most relevant to designers of vehicle head units, source units, and aftermarket automotive audio control platforms. The -E2 ordering code is associated with the 22SOP tape-and-reel package in the verified distributor record. Package choice remains critical for automotive production because PCB land patterns, pin orientation, soldering profiles, and moisture-handling requirements must match the assembled board. No manufacturer pin-assignment table or complete electrical characterization was present in the supplied verification data. When evaluating this device, engineers should obtain the Rohm BD3805F datasheet and confirm supply voltage, interface topology, supported audio paths, control signals, reset requirements, clocking, and production test procedures. The verified web results provide purchasing and classification data but do not establish detailed operating ratings, so those parameters are marked as data needed rather than estimated. This page consolidates verified distributor classification, lifecycle-sourcing context, package information, comparison limitations, and engineering questions around the BD3805F-E2. Its alternative analysis is intentionally limited to parts supported by the supplied cross-reference evidence, avoiding unrelated audio amplifiers or processors that would require board redesign rather than a true drop-in substitution.
BD3806FS-E2 Audio Processor | ROHM Semiconductor
The ROHM Semiconductor BD3806FS-E2 is an audio special-purpose integrated circuit associated with medium-power linear and switching applications. Verified distributor records identify the component as an audio processor and audio channel IC, while package references vary between 22SOP and SSOP-32. The BD3806FS-E2 therefore belongs to the amplifier and audio-processing portion of the broader integrated-circuit hierarchy, where dedicated audio devices condition, amplify, or route low-frequency signals. An audio special-purpose IC is an integrated circuit optimized for functions such as audio amplification, channel control, signal processing, and drive-stage management. Unlike a general-purpose operational amplifier, an audio processor can incorporate application-specific circuitry intended to simplify multi-channel or medium-power audio designs. The supplied records classify the BD3806FS-E2 specifically as an audio processor, but they do not provide a verified datasheet or internal database specifications for its voltage, current, gain, channel count, frequency response, or protection features. The verified distributor classification is the principal functional attribute available for this part. Its application context is identified as medium-power linear and switching applications, indicating that it is associated with audio power-chain design rather than general signal processing. One supplier describes the device as an audio channel, while another labels it an audio processor. The latter appears repeatedly across distributor records and is therefore used as the primary product description in this data set. Physical packaging must be confirmed before PCB design or procurement. Verified sources contain both “22SOP” and “SSOP32” descriptions for BD3806FS-E2. Because the available records conflict and do not provide a complete manufacturer pinout, no reliable pin numbering or exposed-pad arrangement can be published here. The component should be ordered only after its ordering code, package drawing, lead pitch, and terminal mapping have been checked against the current ROHM Semiconductor datasheet or a distributor-controlled CAD and data sheet. BD3806FS-E2 can be evaluated for consumer audio channels, powered speakers, compact stereo systems, and other medium-power audio products in which the circuit requires an integrated audio function rather than a generic signal-path amplifier. Its precise suitability depends on supply voltage, output topology, channel configuration, thermal dissipation, and required protection, none of which can be confirmed from the supplied web evidence. Engineers should therefore avoid making final architecture or layout decisions from the distributor category alone. The primary design caution is to verify package and electrical data before substitution or assembly. A distributor listing may combine historical LAPIS Semiconductor material with a current ROHM Semiconductor record, and inconsistent package descriptions are present in the evidence. Obtain the authoritative datasheet, confirm the exact ordering suffix, and compare every pin function before compiling a footprint or designing a replacement. Distributor availability should also be checked at order time because the provided search results do not contain a stable inventory count or quoted price table. This page consolidates the verified distributor classifications, package conflicts, sourcing links, and available cross-reference evidence for BD3806FS-E2. It deliberately distinguishes confirmed information from missing electrical data and avoids inventing voltage ratings, pin definitions, pricing, drop-in equivalents, or lifecycle claims that were not supplied by the verified sources.
BD3809FS-E2 Audio Processor 22-SOP | ROHM Semiconductor
The ROHM Semiconductor BD3809FS-E2 is an audio processor integrated circuit supplied in a 22-pin SOP package. The verified distributor listing identifies the device as an audio processor, while the DigiKey listing categorizes it as an audio channel IC. The component is intended for audio signal-processing equipment where a dedicated integrated circuit is preferred over a discrete implementation of multiple analog and control functions. It is supplied in tape-and-reel packaging according to the verified product listing, with a stated inventory of 4,609 pieces at the referenced distributor as of the verification date. An audio processor IC is a specialized form of signal-processing semiconductor. In the broader hierarchy, it belongs to the integrated-circuit category and is associated with audio-channel processing, interface, and control functions. Unlike a general-purpose microcontroller or DSP, the BD3809FS-E2 is positioned specifically for audio applications. Exact input formats, output stages, control interfaces, gain settings, distortion limits, voltage requirements, and supported channel configurations are not present in the supplied verified data and should therefore be confirmed in the manufacturer datasheet before schematic capture or PCB layout. The verified catalog data provides several practical procurement and assembly facts. The BD3809FS-E2 is offered as an IC AUDIO PROCESSOR in a 22SOP package. One distributor lists its RoHS status as ROHS3 compliant, and another listing describes the component as tape-and-reel packaged. Digikey identifies the part as available from ROHM Semiconductor and provides access to datasheet, pricing, and availability information. These catalog statements make the part searchable as a dedicated audio-channel solution rather than a generic logic or memory device. The BD3809FS-E2 is relevant to audio-system design, including signal-conditioning modules, compact audio interfaces, and equipment requiring a dedicated audio processor. Because the supplied snippets do not disclose the complete electrical architecture, designers should not assume a particular microphone gain, line-level input sensitivity, speaker-drive capability, channel count, sampling format, or supply voltage. The manufacturer datasheet and pinout are the controlling references for those details. A key engineering consideration is that the 22SOP footprint requires PCB design rules appropriate to the exact lead pitch and outline shown in the manufacturer drawing. Confirm pad dimensions, pin numbering, exposed thermal features if any, soldering profile, and recommended ground layout before releasing artwork. Also verify the logic levels, power rails, decoupling requirements, and analog signal routing against the target system architecture. This page consolidates the verified catalog identity, category, package, RoHS statement, packaging format, distributor availability, and engineering-selection cautions for BD3809FS-E2. It also distinguishes verified facts from parameters that still require datasheet confirmation, helping engineers make an initial sourcing decision without mistaking category-level descriptions for full electrical specifications.
BD3817KS - 7-Ch Audio Signal Processor | ROHM Semiconductor
The ROHM Semiconductor BD3817KS is a 7-channel audio signal processor with a 10-channel input selector, 0.001% THD+N, and adjustable gain from 0 dB to 7 dB in a 100-SQFP package measuring 14 mm by 20 mm. It is designed for high-fidelity audio systems that require centralized volume control and selection among multiple audio sources. An audio signal processor is an integrated circuit that manipulates or routes audio signals while adding control functions such as channel selection, volume adjustment, or gain control. Within the broader semiconductor hierarchy, the BD3817KS belongs to the signal-processing and power-management electronics used in consumer audio, home-theater, and professional audio equipment. Its combination of seven volume-controlled channels and a ten-source selector reduces the need for separate analog routing components. The principal documented features are seven volume-control channels, ten input-selection channels, 0.001% total harmonic distortion plus noise, and a gain-control range of 0 dB to 7 dB. The 100-SQFP package provides 100 electrical contacts in a relatively compact surface-mount footprint. The verified distributor listing describes the device as an audio signal processor rather than a power amplifier, so it should be positioned upstream of output amplification stages. BD3817KS integrates routing and gain control into one dedicated audio-processing device. A 10-channel input selector can organize multiple source paths, while seven independent volume channels support multi-zone or multi-speaker systems. The stated 0.001% THD+N specification is appropriate for evaluating signal-integrity requirements, although the applicable frequency range, measurement bandwidth, and test conditions are not present in the supplied data and should be confirmed in the manufacturer datasheet before design release. Typical uses include home-theater receiver routing, multi-zone listening systems, professional audio consoles, and other equipment combining several analog sources with independent level control. In a home-theater design, the processor can select among set-top-box, disc, console, and auxiliary inputs before the selected channels feed external amplifiers. In an active-speaker or amplifier platform, the same approach supports separate level adjustment for surround or zone channels. PCB implementation should preserve the analog signal paths associated with each selected channel and provide appropriate grounding and decoupling. The verified data does not state the supply voltage, exposed-pad connection, recommended capacitor values, or exact pin assignments, so these details must be taken directly from the manufacturer datasheet. A 100-pin footprint also requires careful component placement to keep routing short and preserve signal integrity. This product record combines the verified distributor identity, channel configuration, package information, THD+N figure, gain range, sourcing links, and application-oriented design guidance. It also distinguishes documented facts from unresolved parameters that require datasheet confirmation, avoiding unsupported substitutions or misleading drop-in recommendations.
BD3818KS - 6-Channel 5.1ch Audio Processor | ROHM
The ROHM Semiconductor BD3818KS is a 5.1-channel sound processor that integrates a mode selector, a five-channel input selector, six-channel volume control, gain amplification, bass, treble, mixing, and dynamic bass boost. The device is supplied in an 80-SQFP package measuring 14 mm by 14 mm. According to the manufacturer datasheet, its six-channel master volume range extends from 0 to -95 dB in 1 dB steps, with mute support. An audio sound processor is a specialized semiconductor that controls and conditions multiple audio channels before they reach amplifiers or transducers. Within the broader product hierarchy, the BD3818KS belongs to the audio signal processor class, which is distinct from a power amplifier. Its role is to select sources, set channel levels, apply tone and dynamic-bass functions, and combine the resulting channels into a usable 5.1-channel signal path. The principal functions documented for the BD3818KS include independent six-channel master volume, a five-channel input selector, a gain amplifier, bass control, treble control, mixing, and dynamic bass boost. The mode and input selectors allow an audio system to route selected sources more flexibly than a fixed analog mixer. The 1 dB volume-step resolution provides finer level adjustment than a continuously variable control implemented solely with external passive components. The BD3818KS and BD3811K1 share the same 5.1-channel sound-processor concept and integrated mode and input selectors. The BD3818KS adds mixing and dynamic bass boost, while the BD3811K1 uses bass boost instead. This distinction is important when comparing the two parts because their control features are not interchangeable even though both devices are associated with the same family documentation. Typical uses include home-theater preamplifier and selector boards, multichannel amplifier control systems, car-audio controllers, and powered speakers that require centralized channel-volume and tone adjustment. The device is intended for systems in which source selection, channel balance, and low-frequency enhancement are implemented digitally or through a remote-control bus rather than by discrete potentiometers. A successful design should preserve the recommended analog signal path, connect decoupling capacitors close to the supply pins, and route all six channels consistently to the downstream amplifier inputs. Designers should also verify the exact control logic, reference-voltage requirements, supported input levels, and unused-pin treatment against the manufacturer datasheet before releasing production artwork. This page consolidates the verified product identity, package information, distributor availability references, function summary, family comparison, and design considerations for the BD3818KS. It also identifies which electrical, pin-level, pricing, compliance, and lifecycle details still require confirmation from the original manufacturer documents.
BD3827K-E2 - Car Audio Sound Processor | ROHM
ROHM Semiconductor BD3827K-E2 is an SCF built-in sound processor with equalizer for car-audio systems, supplied in an SSOP package. The verified product information identifies the device as a special-purpose audio signal processor and describes the BD3827K family as an SCF built-in sound processor for car audio. These confirmed attributes place it within the broader hierarchy of audio IC, sound processor, car-audio processor, and semiconductor categories. A sound processor is a dedicated analog audio IC that adjusts or conditions multiple audio signal parameters within a vehicle infotainment or head-unit system. By integrating sound-shaping and equalizer functions into one device, the BD3827K family can reduce the number of separate external control components required by a car-audio architecture. Its exact internal signal path, supported filter modes, control interface, and channel configuration must be confirmed from the manufacturer datasheet before a new circuit is released. The verified manufacturer-linked documents identify BD3827K as an SCF sound processor with equalizer functionality for automotive audio. The E2 ordering code is available from DigiKey as part number 846-BD3827K-E2TR-ND. A distributor-provided datasheet copy also identifies the device as lead-free and RoHS compliant. No numerical input-voltage range, output-voltage range, current consumption, channel count, frequency response, control-bus timing, or absolute maximum ratings were present in the supplied search results. BD3827K-E2 belongs to ROHM Semiconductor's legacy audio-processing portfolio and is positioned for car-audio rather than general-purpose signal conditioning. Its equalizer role suggests that the device is intended to compensate for speaker, enclosure, cabin, and source characteristics, subject to confirmation of the specific modes and control options in the datasheet. The device should be evaluated against the exact filter architecture, signal levels, control protocol, and end-product test requirements rather than by package alone. Typical use cases include automotive head units, CD or radio source modules, in-dash audio controllers, car-amplifier input conditioning, and vehicle sound-field adjustment. In these systems, the processor can sit between source audio and downstream amplifiers, allowing tonal corrections to be applied before power amplification. Integration can simplify the analog signal path, but validation must include channel alignment, distortion, noise, clipping, thermal behavior, and automotive operating requirements. The principal design caution is that the available search snippets do not expose a complete pinout or electrical limit table. Engineers should use the ROHM BD3827K datasheet to confirm every pin, supply connection, ground requirement, external component, control signal, and test point before layout or firmware work. The component is an SSOP package, so pin escape and exposed-pad assumptions must not be made without the full package drawing and pin description. This product record consolidates the confirmed manufacturer-linked datasheet information, distributor identification, sourcing links, ordering code, and application context for BD3827K-E2. It also separates verified facts from unavailable numerical parameters, helping engineers locate the authoritative six-page BD3827K datasheet and assess car-audio sound-processing requirements without treating inferred specifications as verified production data.
BD3861FS - 3-Band Audio Equalizer Sound Processor | ROHM
The ROHM BD3861FS is an analog sound processor with a built-in three-band equalizer, controlled through a two-wire serial interface and intended for boom boxes, mini-audio systems, micro-audio systems, and front-stage preamplifiers. The device is offered in a 32-pin SSOP package and is identified by ROHM as a Last Time Buy product following its discontinuation announcement. An audio sound processor is a specialized analog signal-chain IC that adds source selection, tone shaping, and level control functions before a power amplifier. The BD3861FS combines those functions into one IC, allowing a compact consumer-audio design to implement bass, midrange, and treble adjustment without requiring a separate network of analog switches and passive tone-control circuitry. According to the ROHM product page, the key feature is the integrated three-band equalizer. The manufacturer documentation describes high signal-to-noise performance obtained through a two-stage architecture, while the two-wire serial control provides electronic adjustment from a remote-control processor or system controller. The verified sources also identify the family as supporting sound-quality designs that incorporate source selectors and serve as the preamplifier immediately ahead of a power amplifier. Typical applications include boom-box and portable-stereo signal paths, compact micro-audio systems, and preamplifier stages that feed an external audio power amplifier. Its integration can reduce external switching components and simplify control firmware, although the 32-pin SSOP footprint is larger than modern compact audio-controller packages. System designers should confirm the complete pin functions, electrical limits, and serial-command table in the manufacturer datasheet before laying out a new board. Because the BD3861FS is in Last Time Buy status, engineers should avoid new-volume designs unless the supply situation is commercially acceptable and a documented time-buffer plan exists. For an active production program, evaluate a currently supported audio processor with the same required control protocol, source-selection functions, equalizer bands, and system-level pin compatibility instead of assuming that a mechanically similar IC is electrically interchangeable. This page consolidates the verified manufacturer and distributor information, identifies the product's discontinuation status, and separates confirmed capabilities from electrical details that must be confirmed in the original datasheet. Pricing, stock, and remaining-life conditions are quote-dependent and are not presented as guaranteed availability.
BUF634AIDDAR - 210MHz 250mA High-Speed Buffer | Texas Instruments
The Texas Instruments BUF634AIDDAR is a 36 V, 210 MHz high-speed open-loop buffer with 250 mA output current capability and a 3750 V/us slew rate, housed in an 8-pin SOIC PowerPad (DDA) package. A buffer amplifier is a unity-gain voltage follower that isolates a high-impedance source from a low-impedance load, providing current gain without voltage gain. Within the power-management and signal-chain hierarchy, the BUF634A sits between precision amplifiers and their loads, forming part of the broader family of high-speed operational amplifier and buffer ICs used in analog front ends. Key features include pin-selected bandwidth from 35 MHz to 210 MHz, adjustable via an external resistor between the V- and BW pins, an internal output current limit, and integrated thermal shutdown protection. Quiescent current is only 1.5 mA when configured for the 35 MHz bandwidth, making the part efficient for low-power designs that still need bursts of high output drive. Architecturally, the BUF634A is a high-fidelity open-loop buffer that can operate standalone or inside the feedback loop of an op amp to boost output current. The wide supply range of +/-2.25 V to +/-18 V (4.5 V to 36 V total) supports both low-voltage and high-voltage analog rails, while the PowerPad SOIC-8 package provides a low thermal-impedance path to the PCB for dissipating heat during sustained high-current output. Typical applications include high-performance audio headphone and line drivers, precision instrumentation signal buffering, and driving ADC input or coaxial cable loads where 250 mA peak current and wide bandwidth are required simultaneously. A key design consideration is thermal management: at large output currents and voltage swings, estimate power dissipation and use the exposed PowerPad soldered to a copper pour to keep junction temperature within limits; the BW pin resistor trades bandwidth against quiescent current. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet, as of 2026-09-13.
BUF634AIDR - 210MHz, 250mA High-Speed Buffer | Texas Instruments
The Texas Instruments BUF634AIDR is a 36-V, 210-MHz, 250-mA output high-speed open-loop buffer amplifier supplied in an 8-pin SOIC (0.154 inch, 3.90 mm width) surface-mount package. As an upgraded member of the BUF634A family, it drives up to 250 mA of output current while offering an adjustable bandwidth from 35 MHz to 210 MHz, set by a single external resistor connected between the V- and BW pins. A buffer amplifier (also called a unity-gain amplifier or voltage follower) is a signal-conditioning stage that isolates a high-impedance source from a low-impedance load while preserving voltage amplitude. Within the analog signal-chain hierarchy, buffers sit between operational amplifiers and power drivers, providing the high output-current capability that general-purpose op amps lack, without adding closed-loop gain or instability. Key differentiating specifications of the BUF634AIDR include its 250 mA push-pull output-current capability, 36-V supply rating (suitable for dual-supply rails up to +/-18 V), and the user-adjustable 35 MHz to 210 MHz bandwidth. The bandwidth pin allows designers to trade bandwidth for quiescent power, an unusual and valuable feature in a monolithic buffer. The device operates as a standalone open-loop driver or inside an op-amp feedback loop to boost output drive current. Technically, the BUF634A is a high-fidelity, open-loop bipolar buffer. Because it operates open-loop, it adds no phase shift typical of compensated amplifiers, making it stable when placed inside the feedback loop of high-speed op amps such as the TLE207x or TL082 families, which the manufacturer identifies as common companions. The push-pull output stage sources and sinks current symmetrically, improving linearity under reactive loads. Typical applications include high-speed line drivers, video signal distribution, ADC input driving, and audiophile headphone-amplifier output stages, where the combination of 250 mA drive and wide bandwidth maintains signal fidelity. Industrial test instrumentation also benefits from its robust supply range. A key design consideration is bandwidth selection: setting the external BW resistor for just enough bandwidth minimizes quiescent current and high-frequency noise pickup, while the full 210 MHz setting maximizes slew-driven transient performance at higher power. This page synthesizes distributor pricing, verified drop-in replacement data from TI engineering forums, and practical design guidance not found in the manufacturer datasheet alone.
BUF634FKTTT - 250mA 180MHz High-Speed Buffer | TI
The Texas Instruments BUF634FKTTT is a 250 mA high-speed unity-gain open-loop buffer amplifier with 180 MHz bandwidth and 2000 V/us slew rate, housed in a 5-pin TO-263 (DDPAK/KTT) package rated from -40C to +125C. A buffer amplifier is a unity-gain analog stage whose sole purpose is to provide current drive and isolation between a high-impedance source and a low-impedance load. In the power-management and signal-chain hierarchy, buffers sit between precision op amps and their loads, preventing the output stage of the amplifier from dissipating load current internally - a phenomenon known as thermal feedback that degrades offset and drift specifications. The defining feature of the BUF634 is its ability to operate inside the feedback loop of an op amp to multiply available output current up to 250 mA, eliminate thermal feedback, and dramatically improve capacitive load drive. Its 2000 V/us slew rate and 180 MHz bandwidth preserve the speed of the host amplifier, while the wide supply range of +/-2.25V to +/-18V (4.5V to 36V total) covers virtually all precision analog rails. Internally, the BUF634 is a complementary class-AB emitter-follower architecture with a bandwidth-select pin (BW). Tying BW to V- engages the full 180 MHz / 10 mA-standby mode; leaving BW open reduces quiescent current for power-sensitive designs at reduced bandwidth. The KTT DDPAK-5 tab provides a low-thermal-resistance path to the PCB copper for sustained 250 mA output currents. Typical applications include output-current boosting of precision op amps in test and measurement front ends, cable and capacitive-load drivers in data acquisition systems, video and IF signal distribution, and loop-powered actuator drivers in industrial control. Design consideration: place a small series resistor or short snubber at the output when driving long cables, and keep the BW pin connection as short as possible to avoid RF pickup in high-speed mode. This page synthesizes verified distributor data, the TI BUF634 family cross-reference, and practical design guidance in one place - information not consolidated in the manufacturer datasheet alone.
BUF634P - 250mA, 180MHz High-Speed Buffer | Texas Instruments
The Texas Instruments BUF634P is a 250 mA high-speed, unity-gain open-loop buffer amplifier with a pin-selected bandwidth of 30 MHz or 180 MHz, a 2000 V/us slew rate, and a wide supply range of +/-2.25 V to +/-18 V, housed in an 8-pin PDIP (P) package. A buffer amplifier (also called a unity-gain voltage follower) is an analog IC that replicates its input voltage at its output while providing high input impedance and low output impedance. In the signal-chain hierarchy, the buffer sits downstream of op amps, DACs, and sensors, isolating gain stages from heavy or reactive loads. Buffers are a subset of operational amplifier analog front ends within the broader category of amplifiers and linear ICs. Key differentiating features include the 250 mA continuous output current capability, the unique pin-selectable bandwidth: connecting the BW pin to V+ yields the full 180 MHz bandwidth, while leaving it open reduces bandwidth to 30 MHz and cuts quiescent current to only 1.5 mA. Internal current limiting and thermal shutdown protection provide robust fault tolerance, and the +/-18 V supply range supports high-voltage analog systems. Architecturally, the BUF634 is an open-loop, unity-gain buffer with no external compensation requirements, making it inherently stable and free of phase-reversal issues. Because it operates open-loop, inserting it inside an op amp feedback loop increases output current, eliminates thermal feedback errors at the op amp input stage, and dramatically improves capacitive-load drive capability - a technique documented in the manufacturer datasheet application section. Typical applications include headphone amplifiers (where 250 mA drives low-impedance headphones directly), op amp output current boosting in test and measurement equipment, video distribution and cable driving, and PLC/analog output modules. The BUF634P is also a perennial favorite in high-end DIY audio buffer stages. Design-wise, keep the BW pin short to V+ only when slew and bandwidth demand it; the 30 MHz mode saves over 20 mA of quiescent current in multi-channel designs. On 8-pin PDIP, thermal resistance limits continuous dissipation - verify power at high load currents. This page synthesizes verified distributor data, family cross-references, and practical design guidance not found in the manufacturer datasheet alone.