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MAX338CSE+ - 8-Channel CMOS Analog Multiplexer | Maxim
The Maxim Integrated (now part of Analog Devices) MAX338CSE+ is a monolithic CMOS 8:1 analog multiplexer (also configurable as a dual 4:1) housed in a 16-pin narrow-body SOIC (NSOIC) package. It is built to route one of eight single-ended analog inputs to a common output under control of a 3-bit binary address, with on-resistance (RON) of 400 ohm typical over the full signal range. What is an analog multiplexer? An analog multiplexer (MUX) is a semiconductor switch that selects one of N analog input channels and routes it to a single output line, allowing a microcontroller or ADC to "scan" many sensors or signals through a single high-performance analog front-end. Multiplexers belong to the larger family of analog switches and are foundational building blocks in data acquisition, instrumentation, audio routing, and test equipment. The MAX338 operates from a single +4.5V to +30V supply (or dual ±4.5V to ±20V supplies), giving designers wide headroom for industrial 24V rails and ±15V instrumentation racks. Key features include low-leakage CMOS construction (typically < 1 nA at room temperature), break-before-make switching action that prevents momentary channel cross-connection, ESD protection on all logic and analog pins, and pin-compatibility with the industry-standard DG508A / DG509A, enabling direct drop-in upgrade to lower leakage. Logic inputs are TTL/CMOS compatible, simplifying interface to 3.3V and 5V microcontrollers. The MAX338 is fabricated on a low-leakage dielectric-isolation CMOS process that minimizes parasitic capacitance and channel-to-channel charge injection. Internal logic-level translation allows the digital inputs (A0, A1, A2, EN) to be driven directly from modern microcontrollers. The device is specified over the commercial 0C to +70C temperature range, making it well suited for indoor test equipment and laboratory instrumentation rather than industrial or automotive use; for extended temperature ranges see the MAX338E variant. Typical applications include data-acquisition front-ends scanning multiple thermocouples or analog sensors, audio signal routing in mixing consoles and broadcast equipment, automated test equipment (ATE) pin boards, instrumentation multiplexer and sample-and-hold front ends, industrial process control signal multiplexing, and medical patient-monitoring analog front ends. Designers choose it when they need more analog inputs than their ADC provides and require clean, low-leakage switching. When designing with this device, place 0.1uF decoupling capacitors close to V+ and V- (or GND for single-supply use) and keep analog traces short to minimize crosstalk. Ensure all unused digital and analog inputs are tied to a defined logic level (not left floating) to prevent channel-to-channel leakage paths. This page synthesizes distributor pricing, drop-in alternatives, application guidance, and pin-level design notes that complement the manufacturer datasheet.
MAX338EPE+ - 8:1 400Ω Analog Multiplexer | Analog Devices
The Analog Devices MAX338EPE+ is an 8:1 single-ended CMOS analog multiplexer with 400 Ω on-resistance, 16-PDIP package, and 3-bit binary address control. The device connects one of eight inputs to a common output, making it suitable for analog signal routing in instrumentation, test systems, data acquisition, and embedded control equipment. Verified distributor data identifies the MAX338EPE+ as a single-circuit IC switch, 8:1 multiplexer, 400 Ω switch, and 16-pin DIP package; the Analog Devices product page describes the MAX338 family as a monolithic CMOS analog multiplexer. An analog multiplexer is a switching semiconductor that routes multiple analog inputs to one shared signal path under digital control. The MAX338/MAX339 family belongs to the analog switch and mux hierarchy, where the MAX338 provides one 8-channel single-ended path and the MAX339 provides dual 4-channel operation. Reducing the number of external signal connections can simplify wiring, board space, and system architecture when several sensors or measurement nodes must be selected by a controller. Key verified characteristics include an 8:1 configuration, 400 Ω on-resistance, 16-PDIP mechanical package, industrial temperature grade, and through-hole mounting. The MAX338EPE+ uses a 3-bit binary address to select one of eight inputs according to the manufacturer description. The verified snippets do not provide complete electrical limits such as supply voltage, leakage current, bandwidth, switch capacitance, or logic thresholds, so those values must be checked against the official manufacturer datasheet before final design release. The MAX338 family is positioned for low-leakage CMOS analog multiplexing. This makes the device relevant where a controller must scan multiple analog sources while preserving a common signal-conditioning path. The common output can feed a downstream amplifier, ADC, comparator, or measurement front end, while the selected address determines which input reaches that shared node. The exact input signal range and allowable switching conditions depend on parameters not included in the verified search snippets. Typical uses include multimeter and bench-test input selection, sensor-channel scanning, industrial control interfaces, data-acquisition systems, and embedded measurement modules. The 16-PDIP package favors through-hole prototyping and repair rather than compact surface-mount production. Because the available evidence does not provide full timing, power, and absolute-maximum ratings, engineers should use the official MAX338 datasheet and validate signal levels, supply rails, leakage, settling behavior, and control timing in the intended system. A key design consideration is ensuring that the downstream circuit can tolerate the mux's on-resistance, leakage, and charge injection. Signal-chain errors become more significant when source impedance is high, source-to-source voltage differences are large, or measurement accuracy is dominated by leakage. Route the selected output with short traces, maintain a stable reference and supply arrangement, and account for control-signal timing before sampling the analog node. This page combines verified distributor listings, the Analog Devices family description, package information, and practical selection guidance for engineers evaluating the MAX338EPE+. Pricing shown here is a reference as of 2026-10-21 and should be confirmed with the seller before purchase.
MAX338ETE+ - 8:1 400Ω Low-Leakage MUX | Maxim Integrated
The Maxim Integrated MAX338ETE+ is an 8:1 CMOS analog multiplexer with a 400 Ω on-resistance, low-leakage design, and a 16-pin TQFN package measuring 5 x 5 mm. According to the verified manufacturer product page, the MAX338 family is also described as an 8-channel or dual 4-channel low-leakage CMOS analog multiplexer. The device connects one of eight inputs to a common output using a 3-bit binary address, making it suitable for analog signal routing, measurement systems, instrumentation, and control equipment. An analog multiplexer, or analog mux, is an interface IC that routes one selected input channel to a shared output while blocking unselected channels. The MAX338 is a monolithic CMOS device intended for low-leakage signal-path applications. Its 8:1 configuration reduces the number of external signal lines when a system must select among multiple sensors, sources, or measurement channels. The 400 Ω specification is identified by the verified distributor listing, while additional electrical limits are not supplied in the retrieved data and are therefore not inferred here. The key verified feature set includes an 8:1 configuration, 400 Ω on-resistance, low-leakage operation, CMOS construction, and a 16-TQFN 5 x 5 mm package. The manufacturer describes the MAX338 family as connecting one of eight inputs to a common output through a 3-bit binary address. The single-pole, single-throw switching arrangement is represented by the 8:1 mux function, although detailed break-before-make and charge-injection values were not provided in the verified snippets. This part is useful when the system must share a downstream amplifier, ADC, DAC, or measurement block across several analog sources. It can help simplify routing in data-acquisition systems, sensor interfaces, automated test equipment, industrial controllers, and communication equipment. The low-leakage characteristic is particularly relevant when source impedance is high or when leakage can affect measurement accuracy, although the exact leakage limit should be confirmed in the manufacturer datasheet. The 16-TQFN package supports compact surface-mount layouts and requires careful PCB design around the exposed-pad and thermal requirements shown in the manufacturer documentation. A key design consideration is to verify signal voltage, supply voltage, input impedance, switching speed, and leakage against the complete MAX338 data sheet before production release. The verified distributor data confirms the part number and package, but does not provide a complete set of timing, current, or absolute-maximum ratings. This product page combines the verified manufacturer identification, distributor package data, pricing references, and application guidance. It also distinguishes confirmed parameters from values requiring datasheet confirmation, helping engineers make an informed sourcing decision without introducing unsupported specifications.
MAX3485CSA+ - 10Mbps 3.3V RS-485/RS-422 IC | Maxim
The Maxim MAX3485CSA+ is a 3.3V-powered, half-duplex RS-485/RS-422 transceiver rated for data rates up to 10Mbps, supplied in an 8-pin SOIC package. It combines one driver and one receiver for industrial point-to-point and multidrop differential communication. Its low-power design supports compact interface equipment where supply current, board area, and signal integrity are important. The verified product information identifies the MAX3485 family as a true RS-485/RS-422 transceiver with slew-rate-limited operation and protection features. An RS-485/RS-422 transceiver is a physical-layer interface IC that converts logic-level signals into differential bus signals and receives differential bus signals back into logic levels. RS-422 supports balanced, point-to-point communication, while RS-485 adds the ability for multiple drivers and receivers on a shared bus when the system is properly terminated and controlled. The MAX3485CSA+ belongs to the interface-IC hierarchy: transceiver, differential data interface, communications IC, and semiconductor. The MAX3485CSA+ is identified as a 3.3V-powered 10Mbps RS-485/RS-422 transceiver with an 8-SOIC package. The family description also states that the MAX3483 and MAX3488 use slew-rate-limited drivers to minimize unwanted effects, while the broader MAX348x/MAX349x family includes multiple transceivers for different operating requirements. Exact MAX3485CSA+ limits not present in the supplied search data are retained as data-needed rather than estimated. A typical use places the transceiver between a host UART or embedded controller and a cable-based RS-485 or RS-422 link. The differential bus improves noise immunity over single-ended signaling, while the 10Mbps capability supports factory automation, industrial controls, instrumentation links, building automation, and embedded data networks. Bus topology, cable length, grounding, termination, and protocol timing must be validated together because transceiver speed alone does not guarantee reliable network operation. The principal design considerations are correct logic-side voltage compatibility, supply decoupling, controlled enable and driver shutdown behavior, proper bus termination, and protection against electrostatic discharge or inductive transients. The verified distributor information lists the part in an 8-SOIC package and describes the device as a 1/1 RS-422/RS-485 transceiver, but it does not provide a complete manufacturer pinout, electrical limit table, or lifecycle classification. Engineers should consult the official MAX3485 datasheet before layout or production release. This page consolidates the supplied manufacturer, distributor, and cross-reference information with practical selection guidance. It distinguishes confirmed facts from unavailable parameters and avoids treating package variants or merely similar interface ICs as drop-in replacements without verified pin and electrical compatibility.
MAX3485ESA+ - 10Mbps RS-485/RS-422 Transceiver | Analog Devices
The Analog Devices MAX3485ESA+ is a 3.3 V, low-power RS-485/RS-422 transceiver with one driver and one receiver, a maximum data rate of 10 Mbps, and an 8-pin SOIC package. According to the manufacturer product page, the device is in production and is designed for low-power RS-485 and RS-422 communication links. An RS-485/RS-422 transceiver is a physical-layer interface IC that converts logic-level digital signals into differential bus signals and receives differential bus signals back into CMOS-compatible logic. RS-485 supports multipoint, half-duplex communication, while RS-422 is commonly used for point-to-point, full-duplex links. The MAX3485 family combines a driver and receiver in one package to reduce board area and simplify interface implementation. The MAX3485ESA+ is identified as a 3.3 V-powered, slew-rate-limited, true RS-485/RS-422 transceiver. The verified product information specifies a 10 Mbps data rate and an 8-SOIC package. The slew-rate-limited driver is intended to reduce unwanted signal transitions and improve communication behavior on practical differential buses. Each device contains one driver and one receiver. The interface family is suitable for industrial control, instrumentation, data acquisition, building automation, and embedded communications where differential signaling helps reject common-mode noise. The MAX3485ESA+ can also support point-to-point RS-422 links, depending on the system wiring and termination arrangement. Its low-power 3.3 V operation is useful for compact equipment where supply current and bus-energy efficiency matter. When designing a circuit, verify the exact pin functions, supply-voltage limits, driver enable logic, receiver output behavior, and termination requirements from the manufacturer datasheet before layout. RS-485 buses generally need correct biasing and termination at the physical endpoints; RS-422 links require termination appropriate to the selected topology. Never infer an alternate package or pinout from a distributor title alone. This page consolidates the verified manufacturer product information, distributor listings, packaging data, and design-oriented guidance for engineers evaluating the MAX3485ESA+. It also distinguishes the part from functional alternatives that may require different packages, logic functions, or interface architectures.
MAX396EQI - 16:1 Precision CMOS Analog Multiplexer | Maxim
The Maxim Integrated (Analog Devices) MAX396EQI is a precision 16-channel/dual 8-channel low-voltage CMOS analog multiplexer housed in a 28-pin PLCC (11.51 x 11.51 mm) package, specified over the industrial -40C to +85C temperature range. The device is built on Maxim's low-voltage CMOS process and integrates a single 16:1 mux (or two 8:1 muxes in parallel mode) with parallel address logic, making it a classic Maxim precision signal-routing building block. It is the original E-series (extended-industrial) part of the MAX396 family. What is an analog multiplexer? An analog multiplexer (mux) is a switch network that routes one of N analog input signals to a single output line under digital control. Muxes are the foundational building block of analog signal chains, sitting between sensors, test points, instrumentation amplifiers, and an ADC. The MAX396EQI specifically belongs to the CMOS analog mux family, characterized by low on-resistance, low leakage, and rail-to-rail analog signal handling - critical for instrumentation and data-acquisition front-ends. Key specifications include 100 ohm maximum on-resistance (matched within 6 ohm between channels), on-resistance flatness of 10 ohm maximum across the specified analog signal range, transition time under 250 ns, and input off-leakage current below 1 nA at +85C. These characteristics make the MAX396EQI well suited for low-distortion multiplexing of precision signals without the channel-mismatch errors that plague generic muxes. The device operates from a single +2.7V to +16V supply (or split +/- supplies), draws a low quiescent current, and provides ESD-rated inputs with TTL/CMOS-compatible address logic. Architecturally it uses charge-pump driven CMOS analog switches that keep the on-resistance flat over the analog signal range - a hallmark of Maxim's precision muxes versus competing JFET or DMOS parts. Typical applications include data-acquisition front-ends, automated test equipment (ATE) signal routing, audio signal routing, instrumentation multiplexing, and process-control analog input boards. Engineers typically pair the MAX396EQI with a precision op-amp buffer and a successive-approximation ADC to build a 16-channel low-noise analog front-end. When designing with the MAX396EQI, observe the absolute maximum analog signal range of V+ and V- rails; exceeding these destroys the switches. Use a low-ESR bypass capacitor of 0.1 uF close to the supply pin and reserve a small RC network on the address lines to suppress digital switching transients that couple into the analog path. Compared with modern pin-compatible successors, the MAX396EQI delivers superior channel matching but consumes more supply current and occupies a larger PLCC footprint than today's TSSOP muxes. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not typically consolidated on the manufacturer datasheet, helping engineers select, source, and implement the MAX396EQI more confidently.
MAX485CPA+ - Low-Power RS-485/RS-422 Transceiver | Analog Devices
The Analog Devices MAX485CPA+ is a low-power, slew-rate-limited RS-485/RS-422 interface transceiver with one driver and one receiver in an 8-pin PDIP package. The verified product data identifies it as a half-duplex transceiver designed for RS-485 and RS-422 communication, supporting low-power differential bus communication where controlled edge rates help reduce unwanted reflections and electromagnetic interference. The MAX485CPA+ is suitable for industrial equipment, instrumentation, data acquisition, building controls, and other systems that require robust differential signaling over longer cable runs. An RS-485/RS-422 transceiver is an interface IC that converts logic-level digital signals into differential bus signals and receives differential signals back from the bus. In this product family, the transceiver combines a transmitter and receiver while supporting half-duplex communication, meaning the shared bus can transmit or receive according to the system design. The MAX485CPA+ belongs to the broader interface-IC and RS-485 transceiver hierarchy, linking digital logic equipment to a physical differential communication network. Key verified features include a low-power communication architecture, slew-rate-limited signaling, one driver, one receiver, and compatibility with both RS-485 and RS-422 applications. The verified distributor listings identify the package as an 8-pin PDIP and categorize the part as a half-duplex transceiver. The eight-pin package supports through-hole assembly and provides the standard transceiver connections needed for a board-level industrial interface. The official Analog Devices product page describes the MAX485 family as low-power transceivers for RS-485 and RS-422 communication. The transceiver architecture is important in systems where a controller UART connects to a field bus. The driver presents the outgoing data as a differential signal, while the receiver converts the differential bus state into a logic-level signal for the host. Slew-rate limiting reduces the high-frequency content of transitions, helping control signal integrity on terminated or moderately loaded buses. Designers must still select the correct cable, termination, grounding, and biasing strategy for the installed network. Typical applications include industrial automation links, remote sensor networks, security equipment, test and measurement systems, building automation controllers, and communication links between embedded processors and external transceivers. A microcontroller or programmable controller can use the MAX485CPA+ to communicate over a longer differential bus instead of relying on a single-ended signal. The design must account for bus direction control, driver enable timing, receiver enable timing, and the electrical limits of the connected network. For PCB design, place the transceiver close to the connector and route the differential pair with consistent geometry, minimal stubs, and appropriate grounding. Use termination only where required by the bus topology, and verify the cable length, baud rate, node count, and common-mode environment. This page combines verified product descriptions, distributor sourcing information, cross-reference results, and practical interface guidance for engineers evaluating the MAX485CPA+.
MAX485EESA+ - ±15kV ESD RS-485/RS-422 Transceiver | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX485EESA+ is a 5V, half-duplex, slew-rate-limited RS-485/RS-422 transceiver in an 8-pin SOIC (SO-8) package, featuring ±15kV ESD protection on the bus pins for harsh industrial environments. It integrates one driver and one receiver, supports data rates up to 2.5 Mbps, and operates from a single 5V supply drawing 1 mA (typical) quiescent current while allowing up to 32 transceivers on the bus. The slew-rate-limited driver minimizes EMI and reflections on improperly terminated cables, enabling error-free transmission over twisted-pair media up to 1200 m. The MAX485EESA+ includes ±15kV HBM ESD protection on the driver output and receiver input pins, making it suitable for hot-swap and field-bus installations where cable discharge events are common. An RS-485/RS-422 transceiver is a differential line driver/receiver IC that converts a single-ended TTL/CMOS logic signal into a balanced differential pair suitable for transmission over twisted-pair cabling. RS-485 supports multi-drop (up to 32 unit loads, 256 with newer parts) half-duplex communication across long distances; RS-422 is a point-to-point full-duplex standard. The MAX485EESA+ belongs to the half-duplex RS-485 transceiver class within the larger interface-IC category of wired communication semiconductors. Key features include ±15kV HBM ESD protection, slew-rate-limited driver for low EMI, 1/2 unit-load input impedance, thermal-shutdown protection, and short-circuit current limiting. The receiver provides fail-safe operation, guaranteeing a logic-high output when the bus inputs are open, shorted, or idle, eliminating the need for external biasing resistors at the ends of the cable. Current limiting and thermal shutdown protect the driver outputs against excessive power dissipation caused by bus contention or output short circuits to ground or supply. Typical applications include industrial field-bus networks (Modbus, Profibus, DMX512), building automation (BACnet, LonWorks), HVAC controls, security systems (access control, alarm panels), and point-of-sale (POS) equipment. The wide operating temperature range (-40 °C to +85 °C for the E grade) and rugged ESD rating make it a drop-in solution for industrial controllers, PLCs, and motor-drive interfaces. When designing with this device, place 100 nF bypass capacitors as close as possible to VCC (pin 8) and provide a 120 Ω termination resistor at each end of the bus when using the highest data rates. Keep the PCB stub length to the connector below one-tenth of the driver rise time to minimize reflection-induced jitter. Use twisted-pair cable with 100 Ω characteristic impedance (e.g., Belden 3106A) and avoid running RS-485 traces parallel to noisy switching rails. This page synthesizes distributor pricing, drop-in same-package alternatives, and application design notes that extend beyond the manufacturer datasheet.
MAX485ESA+ - 5V RS-485/RS-422 Transceiver, 2.5Mbps, SOIC-8
The Analog Devices (formerly Maxim Integrated) MAX485ESA+ is a low-power, slew-rate-limited RS-485/RS-422 transceiver housed in an 8-pin SOIC package. The device contains one driver and one receiver, operates from a single 5 V supply, and supports data rates up to 2.5 Mbps with half-duplex communication. It draws between 120 µA and 500 µA of supply current when unloaded or fully loaded with disabled drivers, making it well suited for power-sensitive industrial networks. What is an RS-485/RS-422 transceiver? An RS-485 transceiver (TIA/EIA-485) is a differential line driver/receiver IC that converts a single-ended TTL/CMOS logic signal into a balanced differential signal suitable for transmission over twisted-pair cabling. RS-485 transceivers belong to the broader physical-layer IC family inside Interface ICs, which also includes RS-232, CAN, and I2C transceivers. The half-duplex variant shares one differential pair between driver and receiver, reducing cable cost for bidirectional buses such as Profibus, Modbus RTU, and DMX512. Key features of the MAX485ESA+ include a 1/8 unit-load input impedance (allowing up to 256 transceivers on a single bus), driver short-circuit current limiting, and thermal-shutdown protection that places the driver outputs into a high-impedance state. The receiver includes a fail-safe function that guarantees a logic-high output when the differential input is floating, shorted, or terminated but idle. Industry-standard SOIC-8 pinout and 5 V operation make the part a drop-in upgrade or replacement for legacy Maxim/Intersil RS-485 designs. Internally, the driver uses a slew-rate-limited output stage to reduce EMI and reflections on unterminated cables, while the receiver incorporates hysteresis and an input filter to reject common-mode noise. The common-mode input voltage range extends from -7 V to +12 V relative to ground, supporting long cable runs with significant ground potential differences between nodes. Typical applications include industrial field-bus networks (Modbus, Profibus, BACnet), building automation, HVAC controllers, motor-control command links, point-of-sale terminals, and multidrop RS-485 utility metering. Designers select the MAX485ESA+ when they need a proven, second-source-friendly 5 V half-duplex transceiver with long-term availability. When designing with this part, place 120 Ω termination resistors only at the two physical ends of the bus to avoid loading the drivers. Use a 100 nF decoupling capacitor placed within 5 mm of the VCC pin, and route the A/B differential traces with controlled 100 Ω differential impedance and ground-referenced return paths. This page synthesizes distributor pricing, drop-in compatible alternatives (including the SN75176B and SP485EN-L/TR families), and practical design notes that go beyond the bare datasheet, helping engineers select and source the right transceiver faster.
MAX487ESA+ - Low-Power Slew-Rate-Limited RS-485/RS-422 Transceiver | Analog Devices
The Analog Devices MAX487ESA+ is a low-power, slew-rate-limited RS-485/RS-422 transceiver containing one driver and one receiver in an 8-pin SOIC (NS) package. It operates from a single 5V supply, supports data rates up to 250 kbps, and provides ±15 kV ESD protection on driver output and receiver input pins. The MAX487ESA+ features low quiescent supply current (120 µA to 500 µA) under load and 0.1 µA in shutdown, making it ideal for power-sensitive multi-drop networks. An RS-485 transceiver is a differential line driver/receiver that translates logic-level UART signals to a robust differential signal capable of being transmitted over long cables in electrically noisy environments. RS-485 supports multi-drop configurations of up to 32 transceivers on a single twisted pair, enabling half-duplex or full-duplex communication over distances up to 1200 m. RS-485 transceivers belong to the broader interface IC category within power management and communication ICs, and are standardized under TIA-485 (formerly EIA-485). Key features include slew-rate-limited driver outputs that reduce EMI and reflections on unterminated or improperly terminated cables, true fail-safe receiver inputs that guarantee a known output state when the bus is idle or shorted, and a low-current shutdown mode that places the device in <0.1 µA quiescent for power-saving operation. The MAX487ESA+ carries ±15 kV HBM ESD protection on the bus pins, providing robust tolerance to electrostatic discharge events during handling and field installation. The MAX487ESA+ integrates a complete half-duplex RS-485 link layer with internal cable termination management through slew-rate control rather than discrete termination. Its 5V single-supply operation simplifies power architecture in industrial 24V-rail-derived systems, and its robust differential signaling supports industrial control, building automation, and point-of-sale applications. Typical applications include industrial fieldbus networks (Modbus, Profibus), HVAC building automation systems, motor control encoder feedback, point-of-sale (POS) terminals, security system intercom panels, and remote utility metering. The MAX487ESA+ pinout and protocol match the broader MAX481/MAX483/MAX485/MAX487/MAX1487 family, allowing drop-in upgrades and obsolescence mitigation across existing designs. Design considerations: include a 100 nF decoupling capacitor close to VCC, place a 120 Ω termination resistor across the differential pair only at the cable ends, and ensure the cable shield is grounded at one end only to suppress ground loops. The DE and RE pins control driver/receiver direction; when using half-duplex, tie DE and /RE together with a single GPIO line. This page synthesizes distributor inventory, parametrically matched drop-in alternatives from the MAX48x family and competitive second sources, and practical design notes that go beyond what the manufacturer datasheet alone provides.
MAX6816EUS+T - ±15kV ESD SOT-143-4 Switch Debouncer | Maxim
The Analog Devices / Maxim Integrated MAX6816EUS+T is a single-channel CMOS switch debouncer IC housed in a 4-pin SOT-143-4 surface-mount package, qualified over a 2.7 V to 5.5 V supply range and engineered for clean interfacing of mechanical switches to digital logic. It delivers a clean, debounced logic output from one bouncing mechanical input at 25 µA quiescent current with ±15 kV ESD protection on the switch input. A switch debouncer is a specialized interface IC that filters the mechanical contact bounce of switches, keypads, relays, or other electro-mechanical contacts so a downstream microcontroller or ASIC receives a single, deterministic logic transition. As a subcategory of supervisory / interface ICs, switch debouncers sit between the analog-mechanical input domain and the digital domain; they belong to the broader interface-IC hierarchy (specialized interface -> interface IC -> integrated circuit) and serve the same role as a hardware RC filter plus Schmitt trigger, but in a single chip. Key features of the MAX6816EUS+T include a fixed 40 ms (typical) debounce qualification delay that removes both switch opening and closing bounce, ±15 kV HBM ESD protection on the switch input per IEC 61000-4-2 air-discharge testing, 2.7 V to 5.5 V single-supply operation, low 25 µA quiescent current, and a small SOT-143-4 outline. The output stage is a CMOS push-pull driver capable of sourcing/sinking several milliamps, so it can directly drive most CMOS logic families without an external pull-up resistor. The MAX6816/MAX6817/MAX6818 family is fabricated on a low-power CMOS process with on-chip ESD cells and a precision timer block that sets the debounce interval without external capacitors. Compared to discrete RC + Schmitt debounce networks, the integrated timer is stable across temperature and removes the need for tuning. The MAX6818 (octal, 20-pin) is pin-compatible with the LS573 octal latch (except for the CH pin), giving a migration path for designers scaling from 1 channel to 8 channels. Typical applications of the MAX6816EUS+T include membrane keypad interfaces, pushbutton reset circuits, industrial control panels, automotive body controllers, portable consumer electronics, and appliance front-panel switches. The compact SOT-143-4 footprint makes it suitable where board area is constrained. When designing with this part, place a 0.1 µF decoupling capacitor within 5 mm of the VCC pin and keep the trace from the mechanical switch to the IN pin short to maximize ESD protection effectiveness. The output does not require a pull-up resistor. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes beyond what the manufacturer datasheet alone provides.
MAX9675ECQ+ - 110MHz 16x16 Video Crosspoint Switch | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX9675ECQ+ is a nonblocking 16 x 16 video crosspoint switch with buffered inputs and outputs, programmable gain, and a 110 MHz bandwidth. It is housed in a 100-pin TQFP (14x14 mm) package and operates from a single 2.7 V to 5.5 V supply, drawing a low quiescent current suited to multi-channel video routing cards and large switching arrays. A video crosspoint switch is an analog or digital signal-routing IC that allows any of N inputs to be switched to any of M outputs, typically with buffering on both sides so signals can drive long PCB traces or 75 ohm video loads. Crosspoint switches sit at the heart of video routers, production switchers, surveillance multiplexers, and broadcast equipment, replacing mechanical relays and discrete video amplifiers with a single silicon device. Programmable gain lets the designer compensate for cable losses or output-load variations across channels. The MAX9675ECQ+ integrates sixteen buffered inputs and sixteen buffered outputs with a fast SPI/QSPI-compatible 3-wire serial interface for matrix mode and per-channel gain programming. The BiCMOS process supports rail-to-rail video swings and wide bandwidth at low quiescent power, while on-chip clamp and bias circuitry preserves AC-coupled video baselines. All outputs are held in a high-impedance disabled state during power-up to avoid signal contention in multi-device arrays. Typical applications include broadcast video routers, professional video switchers, security and surveillance multiplexers, medical imaging pipelines, automotive infotainment video backbones, and test-and-measurement video generators. The wide supply range (2.7 V to 5.5 V) makes it compatible with both 3.3 V and 5 V logic, while the 110 MHz -3 dB bandwidth easily handles SD-SDI, composite, component, and RGBHV video formats. When designing, AC-couple inputs and outputs with 220 uF electrolytics and 0.1 uF ceramics, keep ground returns short and wide to preserve 110 MHz flatness, and program gain conservatively at +1 (0 dB) for cable-compensated long runs to avoid clipping into 75 ohm loads. This page synthesizes distributor pricing, drop-in alternative MPNs, parametric comparison data, and practical design notes not found in the manufacturer datasheet alone.
MAX98090AEWJ+T Ultra-Low-Power Stereo Audio Codec | ADI
The Analog Devices MAX98090AEWJ+T is an ultra-low-power stereo audio codec with a 24-bit I2S interface, six configurable input pins, and integrated audio signal processing, packaged in a 49-WLP measuring 3.15 mm by 3.15 mm. The device combines microphone, line, headphone, and speaker signal-path functions in a compact package for portable audio equipment. According to the manufacturer product page, its high-performance, low-power design and flexible input scheme make it suitable for portable applications. An audio codec is an integrated signal-processing semiconductor that converts between digital audio data and analog microphone, line, or headphone signals. The MAX98090 belongs to the broader codec hierarchy: audio codec → mixed-signal interface IC → digital and analog signal conversion → portable audio electronics. Its integrated architecture can reduce the number of external components needed for a compact audio subsystem while supporting configurable analog and digital microphone inputs. The MAX98090 provides a 24-bit audio interface and an I2S-oriented digital audio connection, while its six input pins can be configured for analog or digital microphones, differential or single-ended line inputs, or full-scale differential inputs. The manufacturer identifies the MAX98090 as an ultra-low-power stereo audio codec designed for portable systems. Its WLP package provides a small physical footprint, but the package requires careful PCB layout, exposed-pad thermal management, and assembly controls. Typical signal paths include digital microphones feeding an I2S-compatible processor, analog microphone or line sources feeding the codec inputs, and headphone or speaker-related audio functions. The flexible input configuration allows one codec family to address portable recording, communication, and multimedia designs. The exact input sensitivity, sample-rate limits, headphone-output capability, and speaker-output current should be confirmed from the manufacturer datasheet for the final application. The main design consideration is ensuring that microphone and line inputs are correctly configured, bypassed, and referenced. I2S clocking, digital microphone power sequencing, analog grounding, and WLP assembly must be validated together rather than treated as independent blocks. Use the manufacturer datasheet and recommended application information for the complete pin mapping, electrical limits, and PCB land pattern. This product page synthesizes verified manufacturer descriptions, distributor availability, package information, pricing references, and practical design guidance. Because the supplied data does not include a complete verified pin table or all electrical limits, missing values are explicitly marked rather than inferred. Engineers should consult the Analog Devices MAX98090 datasheet before finalizing a high-volume or safety-critical portable-audio design.
MAX9926UAEE+ - 4.5-5.5V VR Sensor Interface | Maxim
The Maxim Integrated MAX9926UAEE+ is a 4.5 V to 5.5 V variable-reluctance sensor interface with differential input, adaptive peak-threshold detection, zero-crossing detection, and logic output in a 16-pin QSOP package. It is designed to turn the small, changing voltage produced by automotive magnetic-coil sensors into robust digital pulses for position, speed, crankshaft, camshaft, and transmission-shaft measurement. A variable-reluctance sensor interface, also called a VR sensor interface or magnetic-coil sensor interface, belongs to the sensor-interface IC hierarchy and conditions signals that would otherwise be difficult for a controller to measure directly. The MAX9926 family combines a precision amplifier, comparator, selectable adaptive peak threshold, and zero-crossing circuitry so the system can detect sensor peaks and timing events while reducing sensitivity to signal-shape and operating-condition changes. The verified product information identifies the MAX9926UAEE+ as a variable-reluctance sensor interface with differential input and adaptive peak threshold in a 16-pin QSOP package. The listed operating supply range is 4.5 V to 5.5 V, and distributor material describes a typical 4.7 mA supply current. The differential input structure supports rejection of common-mode disturbance, while the adaptive threshold is intended to preserve detection performance as sensor amplitude and operating conditions vary. The MAX9926UAEE+ is suited to automotive ignition and engine-position systems, transmission and wheel-speed sensing, industrial magnetic pickup sensing, and other applications where a magnetic target moves relative to a coil. Its logic output gives a downstream microcontroller or engine controller a digital event for timing, direction, or position interpretation. The 16-pin QSOP format also supports compact PCB layouts, although pin-level verification is required before layout release. The principal design consideration is preserving the sensor signal path from the coil to the differential inputs. Route the sensor traces as a short, tightly coupled pair, provide appropriate input conditioning and filtering according to the manufacturer datasheet, and maintain a stable ground reference. Avoid long parallel runs or sharp impedance discontinuities that could degrade noise immunity. This product page consolidates the verified manufacturer identity, package, supply information, distributor availability references, and application context. Detailed electrical limits, pin names, threshold timing, temperature ratings, and exact replacement parameters should be confirmed against the current MAX9926 datasheet before production release.
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.
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.
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.
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.
MC33290D - ISO 9141 K-Line Serial Link Interface | NXP
The NXP (formerly Freescale) MC33290D is an ISO 9141 K-Line serial link bus interface IC housed in an 8-pin SOIC package, designed for bidirectional half-duplex communication between a vehicle's on-board microcontroller and off-board diagnostic equipment. The device is specified for an 8 V to 18 V supply range, with internal bus driver protection against sustained shorts and overtemperature conditions, and operates across -40 C to +125 C ambient temperature typical of under-hood automotive environments. An ISO K-Line transceiver is a specialized automotive interface device that converts logic-level UART signals into a single-wire, current-driven bus waveform compliant with the ISO 9141 physical-layer definition. Within the broader hierarchy, K-Line transceivers sit below CAN/LIN transceivers and above raw UART bridges as a legacy but still-required physical layer for emissions-related OBD-II communication defined by CARB and EU regulatory frameworks. Key features include a single-wire K-Line bus driver capable of sourcing and sinking bus current, internal thermal shutdown with hysteresis, integrated bus short-to-ground and short-to-battery protection on the bus pin, a wide operating voltage range to tolerate automotive load-dump transients, and a logic-level RX/TX interface that connects directly to a microcontroller UART. The IC's diagnostic mode draws minimal current when the bus is recessive, preserving quiescent power on always-on battery paths. Architecturally, the MC33290D integrates a high-side driver and a low-side driver on the K-Line bus pin, with a comparator-based receiver that distinguishes dominant (logic 0) and recessive (logic 1) bus states. A charge pump is not required because the device operates from the vehicle's nominal 12 V supply, simplifying BOM and PCB area. Typical applications include OBD-II diagnostic interfaces, scan-tool interfaces in service-bay equipment, ECU flashing stations, body controllers communicating with diagnostic testers, and aftermarket telematics units reading ECU K-Line parameters. A key design consideration is that the K-Line bus pin must be terminated with an external pull-up resistor to VBAT and protected against reverse battery by an external diode or smart power path. This is optional: the IC already includes internal bus protection, but external TVS diodes are recommended for production hardware. This page consolidates distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet to accelerate part selection for automotive diagnostic designs.
MC33742DWR2 - SBC with HS-CAN Transceiver, SPI | NXP
The NXP MC33742DWR2 is a System Basis Chip (SBC-E-HS) that integrates a 1 Mbps CAN 2.0-compliant high-speed CAN transceiver, a fixed 5.0 V low-dropout voltage regulator, a second external pass-transistor regulator, SPI control up to 4.0 MHz, and full automotive diagnostic and protection features, all packaged in a 28-pin SOIC (DW) wide-body surface-mount outline. The internal LDO delivers 5.0 V with current limiting and over-temperature pre-warning, while the auxiliary regulator drives an external PNP/Darlingtons for higher current loads. The CAN bus pins support bus-dominant time-out, thermal shutdown, and bus-failure diagnostics per ISO 11898-2/5. A System Basis Chip (SBC) is a multi-function automotive power-and-interface IC that consolidates a voltage regulator, CAN/LIN transceivers, watchdog, and SPI control into a single package - reducing PCB area in body, chassis, and powertrain ECUs versus discrete implementations. Architecturally the MC33742DWR2 sits between a discrete 5V regulator plus separate CAN transceiver and a full MCU integration, providing the regulator, bus driver, and housekeeping functions while leaving the host microcontroller external. Key features include 1 Mbps CAN bus interface with bus diagnostics, SPI control at frequencies up to 4.0 MHz, a 5.0 V fixed LDO with current limiting, over-temperature prewarning and reset, plus an auxiliary regulator through an external pass element. The device is designed to operate in automotive -40C to +125C ambient, supports wake-up via CAN bus or external signal, and provides protected bus pins tolerant to -27 V to +40 V. Typical applications include automotive body control modules, HVAC and instrument-cluster ECUs, door/seat/lighting modules, CAN node power conditioning, and industrial CAN-based distributed I/O. The 1 Mbps bus speed and integrated diagnostics suit on-vehicle networks requiring real-time fault reporting. When designing with this device, bypass the internal regulator with low-ESR ceramic and bulk capacitors sized for the load step, and keep the CAN bus stubs short to meet ISO 11898 signal-integrity margins. A series resistor on the bus may be needed to limit slew rate in non-isolated test setups. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not consolidated on the manufacturer datasheet, including cross-brand options and AEO-optimized selection guidance for engineers.
MC33889BDWR2 - SBC with LS-FT CAN, 5.5-18V | NXP Semiconductors
The NXP Semiconductors MC33889BDWR2 is a System Basis Chip (SBC) integrating a low-speed fault-tolerant CAN transceiver, a 5V/3.3V linear voltage regulator, and a high-side/low-side driver in a single 28-pin SOIC package. It operates from a 5.5V to 18V supply, delivers up to 45 mA of internal supply current, and supports automotive bus nodes with hardware diagnostics. The BDWR2 suffix denotes the tape-and-reel packaging option of the B-grade device. A System Basis Chip (SBC) is a category of mixed-signal interface IC that consolidates the power supply, communication transceiver, and protection circuitry that traditionally surround an automotive microcontroller. In the broader hierarchy, the SBC sits below the microcontroller but above simple transceivers and regulators, acting as the gateway between the ECU power domain and the CAN/LIN bus. By collapsing discrete functions into one die, the SBC reduces board area, simplifies EMC design, and improves diagnostic coverage. Key features of the MC33889BDWR2 include a fault-tolerant CAN physical layer compliant with ISO 11898-3, integrated watchdog and reset circuitry for the host MCU, programmable wake-up sources, and a low quiescent current mode for battery-saving in parked vehicles. The integrated 5V regulator (VCC) supplies the host MCU, while an additional 3.3V or adjustable regulator can power sensors and companion ICs. Two high-side switches (typically 100 mA class) and a low-side driver support relay or solenoid loads. The device uses a bipolar-CMOS-DMOS process with on-chip thermal shutdown and short-circuit protection on every regulator output. Diagnostic flags for bus failure, regulator under-voltage, and overtemperature are exposed via the SPI interface to the host MCU, enabling ASIL-friendly functional safety architectures. Typical applications include automotive body control modules, instrument clusters, HVAC controllers, and gateway ECUs that need both a regulated MCU rail and a fault-tolerant CAN bus interface on the same node. The wide 5.5V-18V input range tolerates load-dump events on 12V automotive rails without external protection. When designing with this SBC, place the VCC bulk capacitor as close as possible to the VCC pin and observe the heatsinking requirement of the exposed pad variant if used. Always validate SPI register defaults against the latest NXP datasheet revision before firmware bring-up. This page synthesizes distributor pricing, drop-in NXP variants, and practical automotive design notes not found in the manufacturer datasheet alone.
MC33972DWBR2 - 22-Ch Switch Detection MSDI, SPI, 32-SOIC | NXP
The NXP MC33972DWBR2 is a Multiple Switch Detection Interface (MSDI) with suppressed wake-up, monitoring up to 22 switch contacts and reporting status to an MCU over an SPI serial interface. Packaged in a 32-pin SOIC (0.295 inch / 7.50 mm body width) and supplied from 3.1 V to 5.25 V, the part integrates a 22-to-1 analog multiplexer and operates in Normal mode (programmable, full switch monitoring) or Sleep mode (low quiescent current) to support always-on automotive and industrial body electronics. A Multiple Switch Detection Interface is a type of switch-monitoring IC that scans many discrete contact closures (e.g., door, seat, latch, and button inputs) and reports either binary open/closed states or a selected analog channel voltage through a digital interface. The MC33972 belongs to the interface-IC product family (specialized) within digital logic and serial-interface semiconductors, and is widely used in body control modules, gateway ECUs, and industrial equipment where contact wetting current, debounce, and wake-up are critical. Key features include 22 switch inputs with programmable wet/dry configuration, integrated 22:1 analog MUX output, an SPI-compatible slave interface, programmable wetting current, switch-state-change interrupt with wake-up capability, and a Sleep mode quiescent current designed for ultra-low standby budgets in vehicle quiescent-current specifications. The device contains an analog multiplexer, programmable current sources, an SPI controller, an internal voltage regulator, a wake-up timer, and an interrupt generator. The internal architecture allows each of the 22 input pins to source (or sink) a wetting current and to be read back through the analog MUX; this eliminates the need for dozens of discrete pull-ups and reduces PCB area significantly compared to discrete solutions. Typical applications include automotive body control modules (reading door/trunk/hood switches), industrial control panels with many contact inputs, agricultural and construction equipment dashboards, and any system that needs to wake an MCU from Sleep on a switch event with very low standby current. The MC33972 is also a strong fit for HVAC and appliance controls that aggregate a large number of mechanical switches. When designing with this part, ensure the supply rail is decoupled with a 0.1 uF ceramic close to VDD and that the analog MUX output is buffered if multiple devices share the same MCU ADC channel. Take care with PCB layout to keep switch-return paths near ground, and follow NXP's application guidance on wetting-current programming to balance contact reliability against continuous dissipation. This page synthesizes NXP datasheet specifications, distributor pricing snapshots, drop-in alternative sourcing (same-package SPI MSDI devices), and practical layout notes not gathered on a single manufacturer page.
MC33975EK - 22-Channel Switch Detection SPI Interface | NXP
The NXP MC33975EK is a multiple switch detection interface with suppressed wake-up and 32 mA wetting current, housed in a 32-BSSOP (0.295 in / 7.50 mm width) exposed-pad package. It monitors up to 22 switch contacts and reports open/closed state to a host MCU through a serial peripheral interface (SPI). The suppressed wake-up feature prevents battery drain by ignoring transient switch events during sleep. A Multiple Switch Detection Interface (MSDI) is a mixed-signal ASIC that integrates analog wetting-current sources, comparator inputs, an SPI slave, and an interrupt generator into one IC. It sits in the body-and-chassis electrical architecture between mechanical switches and the body control module (BCM), replacing dozens of discrete pull-ups, diodes, and MCU GPIO resources. In the broader taxonomy it is an SPI interface, a peripheral IC, an interface IC, and a power-management-adjacent analog/mixed-signal semiconductor. Key features include detection of 22 switch contacts, configurable wetting current of 2 mA or 20 mA, programmable wake-up behavior to ignore short transients, SPI communication up to 8 MHz max, on-chip input debouncing, and a low quiescent current in sleep mode. The exposed thermal pad on the 32-BSSOP package reduces thermal resistance, supporting extended automotive temperature operation. Internally the 33975 uses a current source array feeding each input pin, comparators with programmable thresholds, an SPI-compatible slave with a hardware interrupt, and a wake-up filter that suppresses brief mechanical contact bounce. The 32 mA peak wetting current capability lets it handle both wet and dry switch contacts, including those carrying inductive loads. Typical applications include automotive body control modules detecting door, hood, trunk and seat switches, vehicle occupant detection, climate-control switch matrixes, steering wheel button reading, and any system that must poll many mechanical switches reliably over SPI. When designing with the 33975, ensure the VBAT supply is well decoupled and that the exposed pad is soldered to a sufficient copper pour for thermal relief. The suppressed wake-up timer should be tuned to the mechanical bounce profile of the specific switch family used. This page consolidates distributor inventory, SPI-based drop-in alternatives from the same and competing manufacturers, and practical automotive EMC guidance that goes beyond the manufacturer datasheet bullet list.
MC33989DWR2 - System Basis Chip with High-Speed CAN | NXP
The NXP MC33989DWR2 is a System Basis Chip (SBC) integrating a high-speed CAN (Controller Area Network) transceiver with a 5V/3.3V voltage regulator, watchdog timer, SPI interface, and high-side/low-side drivers in a single 28-pin SOIC package. It targets automotive Engine Control Units (ECUs) and other in-vehicle network nodes requiring a compact, mixed-signal power-and-communication front-end. A System Basis Chip is a category of automotive-grade mixed-signal IC that consolidates the discrete building blocks surrounding a microcontroller into a single die. Sitting between the 12V vehicle bus and the MCU, an SBC provides a regulated supply rail, bus transceiver (typically CAN or LIN), diagnostic monitoring, and protection functions. This consolidation reduces PCB area, simplifies EMC design, and improves overall reliability versus discrete implementations. Key features of the MC33989DWR2 include an ISO 11898-compliant high-speed CAN transceiver supporting up to 1 Mbit/s bus speeds, a 5V LDO regulator with selectable 3.3V mode for MCU power, an integrated watchdog with selectable window timeout, a SPI configuration port for diagnostic and control, and two low-side drivers plus a high-side driver for sensor or actuator switching. The device operates across a 5.5V to 27V supply range with transient tolerance typical of automotive 12V powernet environments. Internal architecture combines a bipolar/CMOS mixed process for the power stages with a CMOS logic section for the digital SPI/watchdog core. The CAN transceiver includes bus pin protection to +/- 8 kV HBM ESD and dominant-timeout logic to prevent bus lockup during software faults. Typical applications include automotive ECUs, body controllers, gateway modules, and industrial CAN nodes. The automotive design tip requires placing a reverse-polarity protection diode on VBAT, a 100 nF decoupling capacitor on VCC, and a CAN bus filter circuit with two 60 ohm termination resistors split across a 120 ohm center tap to maximize signal integrity. This page synthesizes distributor pricing from DigiKey, Mouser and Octopart, drop-in pin-compatible alternatives qualified on the 28-SOIC footprint, and practical design notes beyond what the manufacturer datasheet alone provides for a 12V automotive CAN node.