CIs de Interface
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ST75185CTR - 3.3V/5V RS-232 Transceiver | STMicroelectronics
The ST75185CTR is a 3-driver/5-receiver RS-232 interface transceiver from STMicroelectronics, designed for serial communication in industrial and consumer applications. It operates from a single 3.3V or 5V power supply, with an integrated charge pump that generates the required ±10V RS-232 voltage levels. The device is available in a 20-pin SOIC (SOP-20) package, providing a compact solution for space-constrained designs. RS-232 transceivers are a type of serial communication interface IC that converts logic-level signals (typically 3.3V or 5V) to RS-232 voltage levels (±5V to ±15V) and vice versa. They are part of the broader interface IC category, which also includes UARTs, USB transceivers, and CAN transceivers. RS-232 transceivers are essential for legacy serial communication with PCs, industrial equipment, and test instruments, where the RS-232 standard (EIA-232) is still widely used. Key features of the ST75185CTR include a data rate of up to 120 kbps, which is sufficient for most RS-232 applications, and an ESD protection of ±2 kV (HBM) on the RS-232 pins, ensuring robustness in harsh environments. The device also features a low-power shutdown mode that reduces quiescent current to 1 µA, making it suitable for battery-powered or power-sensitive applications. The charge pump requires only four external 0.1 µF capacitors, simplifying the PCB layout. The ST75185CTR uses a dual charge pump architecture to generate the positive and negative supply rails from a single 3.3V or 5V input. This eliminates the need for a separate negative supply, reducing system cost and board space. The device is designed to meet the EIA-232 and ITU-T V.28 standards, ensuring interoperability with standard RS-232 devices. Typical applications include industrial automation, point-of-sale (POS) terminals, data acquisition systems, and embedded systems requiring serial communication. The wide operating temperature range of -40°C to +85°C makes it suitable for industrial environments. The device is also used in networking equipment, such as routers and switches, for console management ports. When designing with the ST75185CTR, ensure that the charge pump capacitors are placed close to the device pins to minimize noise and ripple. The shutdown pin can be used to reduce power consumption when the transceiver is idle. For ESD protection, the device provides ±2 kV HBM on the RS-232 pins, but additional external protection may be required for applications with higher ESD exposure.
STA310 - 6+2-Channel Audio Decoder | STMicroelectronics
The STMicroelectronics STA310 is a fully integrated multistandard audio decoder with 6+2-channel decoding, designed for HDTV, audio players, receivers, and set-top boxes in an 80-pin TQFP (14x14) package. The supplied data confirms support for DVD Audio Meridian Lossless Packing (MLP), uncompressed LPCM with 1–8 channels, and encoded data input through serial I2S, S/PDIF, or parallel interfaces. An audio decoder is an interface IC that converts compressed or encoded digital audio streams into PCM data for downstream digital-to-analog converters, amplifiers, receivers, or speakers. Within the signal chain, it sits between a source interface and the audio output stage, handling format recognition, channel organization, and decoding while leaving analog amplification and loudspeaker drive to downstream components. The STA310's key verified features include integrated multistandard decoding and support for both serial and parallel input paths. The I2S and S/PDIF options suit modern digital audio systems, while the parallel interface can support legacy source architectures. Its 6+2-channel capability is relevant to multichannel home entertainment, although exact channel-routing behavior must be confirmed from the manufacturer datasheet and application implementation. The architecture combines encoded digital audio input, format-specific decoding, and decoded audio output in one device. This integration can reduce the external decoder count in a set-top box, DVD player, HDTV, or surround-sound receiver. System designers must still account for clocking, supported sample rates, output format, electrical levels, signal integrity, and software or control requirements that are not specified in the supplied web excerpts. Typical applications include HDTV audio processing, DVD and disc-player output stages, AV receivers, digital audio players, set-top boxes, and other home-entertainment equipment. The STA310 is especially relevant where a product must accept encoded digital audio from several source types and produce decoded multichannel PCM audio for a downstream codec or amplifier. When laying out an STA310 design, preserve the exact pin assignments and reference interface timing shown in the manufacturer datasheet. Keep digital audio, clock, and power routing controlled, provide the required bypass and interface components, and validate timing margins across every supported input format. This page consolidates distributor identification, verified format support, sourcing data, and engineering guidance.
STB-835 - AN & DIG Panel for I/O | Analog Devices
The Analog Devices STB-835 is an analog and digital panel for I/O, classified by LCSC as an Interface - Specialized integrated circuit. The verified listing identifies the MPN as STB-835 and the manufacturer as Analog Devices, while the available distributor records provide sourcing information rather than a complete electrical datasheet. The supplied listing does not establish the package, pin count, supply-voltage range, signal count, operating temperature, or environmental ratings; those parameters must be confirmed from the manufacturer documentation before design release. An interface IC is a semiconductor that connects a controller, panel, test fixture, or external circuit through analog and digital signal paths. A panel-for-I/O device commonly organizes input and output functions into a defined interface structure, allowing a system to monitor or control external lines through a standardized connection arrangement. Unlike a general-purpose logic IC, a specialized interface panel may combine input conditioning, output drivers, isolation, or panel-specific routing, but the exact functions of STB-835 are not available in the supplied verified records. The strongest verified product facts are the manufacturer identity, the functional description “AN & DIG PANEL FOR I/O,” the Interface - Specialized classification, and the listed commercial availability. LCSC reports the part as in stock and states a price from $61.5230 as of the supplied 2026-10-23 search timestamp. DigiKey, JLCPCB, Octopart, Cytech Systems, and other listings provide purchasing or comparison entry points, but their snippets do not expose enough technical detail to populate electrical specifications without fabrication. STB-835 should therefore be treated as a procurement-qualified interface component with incomplete application-level characterization. Before placing it in a PCB design, obtain the official Analog Devices datasheet or approved Rochester Electronics documentation and verify the exact package drawing, pin names, signal directions, voltage domains, timing, power consumption, and environmental limits. The listed Rochester Electronics association may indicate legacy or specialty sourcing, but it does not establish lifecycle status, obsolete designation, or a direct replacement. Typical design work involves mapping every panel connection to the verified pinout, checking voltage-domain compatibility across connected analog and digital signals, and validating input thresholds and output drive capability before layout. Because no verified package or pinout is supplied, PCB footprint selection must not be inferred from distributor category data. This page distinguishes verified commercial information from missing technical data so procurement and engineering teams can identify the next required verification step. This page combines verified distributor availability, pricing, sourcing links, and explicit data gaps with engineering guidance for evaluating a specialized interface panel. It intentionally avoids guessing pin assignments, electrical limits, lifecycle claims, compliance status, or substitute parts that could create an unsafe PCB redesign.
STB-BB05 - RTI204/205 Interface Panel IC | Analog Devices
The Analog Devices STB-BB05 is an RTI204/205 interface-panel integrated circuit offered in bulk packaging. The verified listing identifies it as an Analog Devices component associated with the Telecom & Specialized integrated-circuit family, while one distributor record categorizes it as a Specialized interface IC. Its exact electrical ratings, pin arrangement, and mechanical dimensions are not exposed in the supplied sources. The available catalog information instead confirms the device identity, manufacturer association, interface-panel role, bulk order form, and sourcing status. Engineers should therefore treat this page as a procurement and identification resource rather than a substitute for the original manufacturer documentation. An interface-panel IC is a type of integrated circuit that connects external equipment, control signals, or peripheral circuitry to a system interface. In the telecommunications and specialized-equipment hierarchy, such a device sits between discrete connectors and higher-level communication electronics: connectors provide the physical path, the interface IC conditions or translates signals, and the host system performs control and data processing. The supplied distributor description associates STB-BB05 specifically with RTI204/205 interface-panel applications, making those panel functions the central application context. The available evidence confirms the MPN STB-BB05, Analog Devices branding, specialized-interface classification, and bulk packaging. One supplier lists a minimum order quantity of 2, while other listings direct buyers to submit an RFQ to confirm stock, date code, and lead time. A Rochester Electronics record reports the component as active. These facts make STB-BB05 potentially relevant to repair, maintenance, replication, and legacy-system support, but production use still requires confirmation of environmental ratings, supply conditions, and pin compatibility. Technically, the available data does not identify whether the device is a surface-mount or through-hole part. Rochester Electronics lists mounting type and package as unavailable, while another supplier describes the shipment format as Bulk. Because the exact package is unknown, no package-specific land pattern, pinout diagram, thermal calculation, or drop-in replacement claim can be supported. This uncertainty is especially important for proprietary interface hardware, where similar connector functions do not guarantee signal-level or timing compatibility. Typical sourcing uses for STB-BB05 include RTI204/205 interface-panel maintenance, specialized telecommunications equipment repair, legacy system restoration, and component matching during low-volume production. For each use, the engineer should verify the original equipment schematic, pin connections, supply requirements, logic levels, and timing before installation. The listing supports component identification and RFQ-based procurement, but does not provide enough technical data to establish those electrical requirements independently. The principal design consideration is to avoid assuming compatibility from the RTI204/205 description alone. Before procurement, request the manufacturer datasheet, drawing, revision status, and inspection information from the supplier or original equipment manufacturer. Also confirm whether the offered unit is an original packaged component, a screened assembly, or an alternate-source item. These checks are essential because a catalog listing can confirm identity and sourcing availability without confirming electrical equivalence or manufacturing provenance. This page consolidates the supplied distributor identities, lifecycle statement, interface classification, package uncertainty, and procurement references. It intentionally avoids fabricating electrical values, pin names, package dimensions, pricing, or cross-references that were absent from the verified sources.
STB-GP - RT1850/RT1860 Panel | Analog Devices | Telecom
The Analog Devices STB-GP is a specialized interface panel identified for use with RT1850 and RT1860 assemblies, available from distributors as an active or in-stock component. The verified product listing identifies STB-GP as “PANEL FOR RT1850 RT1860,” while Rochester Electronics describes the device as belonging to the Telecom & Specialized integrated-circuit family. Its public listing does not provide a conventional IC package, pinout, electrical ratings, interface protocol, or mounting data, so those details remain unverified rather than inferred. The STB-GP designation therefore should be treated as a specialized panel or module-related procurement item until the manufacturer documentation is obtained. A specialized interface IC or panel is used to connect, route, adapt, or terminate signals within a larger telecom, networking, or embedded system. The STB-GP listing connects this item with RT1850 and RT1860, which are identified by the source data as related assemblies, but the exact electrical role, signal directions, connector arrangement, and supported system configuration are not provided. Engineers should therefore confirm the system revision and board connector before ordering or substituting it. The available commercial evidence indicates availability rather than a complete technical datasheet. LCSC lists STB-GP as in stock with a starting price of $69.6681, eBee lists a starting price of $73.2624, and Rochester/FPGACenter lists a starting unit price of $146.99 with volume discounts for quantities of 10, 100, 500, and 1,000. Prices are reproduced as reported and may change without notice as of 2026-10-23. Octopart also lists Analog Devices STB-GP and directs buyers to compare bulk pricing and availability. Because the verified sources do not specify package dimensions, pin count, mounting type, operating temperature, voltage, current, RoHS, REACH, or automotive qualification, this page does not invent those values. The procurement-critical decision is compatibility with the intended RT1850/RT1860 assembly, not an assumed generic IC replacement. Request the current Analog Devices or Rochester Electronics documentation, mechanical drawing, and revision information before using the part in a new design. This page combines verified distributor identity, reported pricing, lifecycle information, sourcing links, and explicit data gaps. It is intended to help engineers identify STB-GP quickly while preventing unsupported assumptions about electrical compatibility, package fit, or drop-in replacement.
STB-TCI - Isolated Analog Signal Conditioning Panel | Analog Devices
The Analog Devices STB-TCI is an isolated analog signal-conditioning panel intended for applications requiring high electrical isolation, with the manufacturer classifying it in the sensor and detector interface domain. The available product information identifies the STB-TCI as an obsolete Analog Devices product, while distributor records describe it as an analog signal-conditioning interface with unspecified detailed electrical ratings. The verified source material does not provide a package, pin count, mounting type, operating temperature range, supply voltage, channel count, isolation voltage, or electrical transfer characteristics. Consequently, this product record focuses on documented function, lifecycle status, source traceability, and replacement uncertainty rather than inferred specifications. According to the Analog Devices product page, the STB-TCI is obsolete. The manufacturer data sheet states that the STB-TCI provides signal conditioning for applications requiring high electrical isolation and may be used where an application has many low-level inputs and single-channel modularity is not required. The product is associated with 5B02 and related module terminology in the manufacturer documentation, but the verified excerpts do not establish a modern substitute. Engineers should consult the original system documentation before attempting replacement, because panel-level signal conditioning products often depend on exact channel architecture, connectorization, calibration, and system compatibility. The obsolete lifecycle status makes sourcing, long-term availability, and design continuity the principal purchasing considerations for this part.
STG4160BJR - 0.5 Ohm SPDT Switch, 15kV ESD, 1.65-4.8V | STMicroelectronics
The STMicroelectronics STG4160BJR is a low-voltage, single-pole double-throw (SPDT) analog switch with 0.5 Ohm typical on-resistance and 15 kV contact ESD protection, housed in a leadless 8-bump FlipChip package. It operates from a 1.65 V to 4.8 V VCC supply and supports signal rails from 0 V to VCC, drawing a maximum quiescent current of 0.2 uA. Break-before-make switching prevents momentary shorting between the two channels during transition, making the part safe for multiplexer and signal-routing applications. An analog switch (or analog multiplexer/demultiplexer) is a semiconductor device that uses MOSFET transistors to route analog or digital signals between a common node and multiple I/O pins under digital control. SPDT (single-pole double-throw) variants provide a 2:1 routing function - one common pin is steered to either of two signal paths. Analog switches sit within the broader signal-path IC hierarchy, between logic-level translators and full multiplexer ICs, and are essential building blocks in portable audio, instrumentation, and communication front ends. Key features of the STG4160BJR include 0.50 Ohm RON at VCC = 4.3 V (TA = 25 C), 15 kV HBM ESD on the switch contact pins (per the ST datasheet), break-before-make action, and an extremely low 0.2 uA quiescent current that preserves battery life in always-on portable designs. The 8-bump FlipChip footprint minimizes board area versus comparable SOT-23-6 SPDT switches, and the wide VCC range (1.65 V to 4.8 V) makes it directly compatible with 1.8 V, 2.5 V, 3.3 V and 4.3 V power rails commonly used in modern handsets. Architecturally the device integrates two back-to-back NMOS transistors per channel, providing bidirectional signal flow from 0 V to VCC. The break-before-make timing is built into the control logic, so no external sequencing is required when the SEL pin toggles state. Combined with the 15 kV contact ESD rating, the part reduces the need for external TVS protection on connector-adjacent signal lines. Typical applications include USB signal multiplexing in smartphones, audio jack / headphone switchover, GPIO expansion, and battery-monitoring signal routing. The wide VCC range also makes it suitable for handheld test equipment and portable medical sensor interfaces where low leakage and small footprint are required. When designing with the STG4160BJR, place decoupling capacitors (100 nF typical) as close as possible to the VCC bump and route the analog signals on a layer with a continuous ground plane. Confirm the maximum continuous current through the switch against the RON derating curve to keep insertion loss within budget. This page synthesizes distributor pricing, pin-compatible alternatives, and design notes not found in the manufacturer datasheet alone, providing an engineering-grade reference for selection and PCB implementation.
STULPI01BTBR - USB 2.0 ULPI OTG Transceiver, 36-TFBGA | ST
The STMicroelectronics STULPI01BTBR is a high-speed USB 2.0 physical-layer transceiver that is fully compliant with the ULPI (UTMI+ Low Pin Interface) specification and the USB On-The-Go (OTG) supplement, providing a complete PHY solution for any high-speed USB host, device, or OTG dual-role controller core operating at 480 Mbps. Housed in a compact 36-ball TFBGA (3.5 x 3.5 mm) package, the device implements the UTMI+ low-pin-count 12-pin bridge to the application ASIC, dramatically reducing the SoC I/O count required for USB connectivity compared to legacy UTMI designs that needed 30+ pins. A USB 2.0 transceiver (also called a USB PHY) is the analog front-end of a USB system, handling the high-speed differential signaling on the DP/DM lines, the low-/full-speed termination, the 1.5 kohm pull-up for device detection, the 15 kohm pull-down on the host side, the OTG session-request comparator, and the charge-pump for VBUS drive. The STULPI01B sits in the hierarchy: USB transceiver (PHY) -> USB interface IC -> interface and transceiver -> semiconductor, and is typically paired with an application processor that implements the upper protocol layers over the ULPI link. Key features include 480 Mbps High-Speed (HS), 12 Mbps Full-Speed (FS), and 1.5 Mbps Low-Speed (LS) operation; integrated 45 ohm Hi-Speed termination and switching between HS and FS/LS terminations; 8-bit SDR ULPI interface operating at 60 MHz; integrated charge pump for OTG VBUS pulsing; on-chip pull-up/pull-down resistors for DP/DM; host, device, and OTG dual-role modes selectable via the ULPI ID pin; I/O supply 1.8 V to 3.3 V; and a 3.0 V to 4.5 V analog supply rail. The chip supports suspend, resume, remote wakeup, and chirp handshake generation required for HS negotiation. Technically the PHY uses a precise 480 MHz PLL locked to the 60 MHz ULPI clock, an HS current-mode driver with controlled edge rates for USB IF compliance, a 3.3 V tolerant ULPI link, and on-die ESD protection on the DP/DM lines. By outsourcing the analog and analog-digital mixed-signal PHY to the STULPI01B, designers can implement the USB digital controller in their standard-cell ASIC or FPGA fabric without requiring an expensive analog process node, which is why this architecture is dominant in mobile, set-top, and automotive infotainment silicon. Typical applications include USB OTG dual-role ports in smartphones, tablets, and portable media players, USB device ports in printers and storage, USB host capability in set-top boxes and automotive head units, USB-to-UART bridge ASICs, and embedded computing platforms that add USB to an FPGA or microcontroller without an internal PHY. The BGA package and small footprint suit 4-layer mobile mainboards where board area is at a premium. When laying out a board using the STULPI01BTBR, place the device as close as possible to the USB connector, keep DP/DM traces matched to 90 ohm differential impedance, and provide a clean analog 3.3 V supply decoupled with a 100 nF + 4.7 uF combination within 5 mm of the VCC pin. The ULPI bus to the SoC should be length-matched and routed over a continuous reference plane to preserve 60 MHz SDR timing margin. This page synthesizes distributor pricing, drop-in same-family and cross-brand ULPI alternatives, and layout notes not collected in a single place on the manufacturer datasheet, giving hardware engineers a one-stop reference for USB OTG PHY selection.
STUSB1600 - USB Type-C Controller with HV Protection | STMicroelectronics
The STMicroelectronics STUSB1600 is a standalone USB Type-C port controller IC, fully compliant with the USB Type-C cable and connector specification (rev. 1.2), housed in a 24-pin QFN (4x4 mm) package. It integrates 5 V VBUS management, attach and orientation detection, VCONN supply for electronically marked cables, and short-to-VBUS protection on the configuration channel (CC) lines for both host-side and device-side USB Type-C implementations. An interface controller IC such as the STUSB1600 sits in the USB Type-C protocol stack between the USB host/device controller (e.g., a USB-PD or USB 3.x controller) and the physical Type-C receptacle. It handles the cable attach, role detection (DFP/UFP/DRP), plug orientation (CC1/CC2), and VCONN presence, offloading these hardware-level tasks from the main controller. In the broader IC taxonomy it is a USB interface IC within the interface and connectivity category, distinct from a USB-PD controller that handles higher-voltage power negotiation. Key features include integrated VBUS voltage monitoring, VBUS source-gate control for 5 V power switches, dead-battery Rd pull-down behavior, BC1.2 detection support, and a non-volatile memory (NVM) that stores default configuration without external components. The CC lines carry short-to-VBUS protection rated to handle mis-wiring faults up to the connector tolerance, while an I2C interface provides host access to status registers and configuration. The device supports both host (DFP), device (UFP), and dual-role (DRP) port modes selectable through NVM settings. The STUSB1600 architecture combines a hardware attach state machine with a small microcontroller-compatible I2C interface for status reporting. Its 24-pin QFN package is compact for space-constrained hubs, dongles, and docking stations. Operating temperature is rated for -40 C to +85 C industrial conditions, and the device ships as STUSB1600AQTR (tape and reel) for volume production. Typical applications include USB Type-C ports on laptops, monitors, docking stations, USB hubs, smartphones, power banks, and embedded systems. Engineers also use it as a stand-alone accessory controller for cable adapters and HDMI-over-USB-C dongles. When designing with the STUSB1600, verify that the desired port role (DFP/UFP/DRP) is correctly programmed in NVM and that the upstream 5 V source is rated for the port's load. Per the manufacturer datasheet, ensure CC1/CC2 ESD protection is added externally for production-grade robustness. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers evaluate the STUSB1600 for new designs and existing BOM migrations.
STUSB4500LBJR - USB Type-C Sink PD Controller, 25-WLCSP | ST
The STMicroelectronics STUSB4500LBJR is a standalone USB Type-C port controller for power-sinking devices, presented in a 25-ball WLCSP package (2.59 x 2.59 mm). It implements USB Power Delivery 2.0 sink negotiation up to 20 V / 5 A (100 W) over the USB Type-C connector and integrates an I2C interface for host configuration, VBUS monitoring, and OVP/OCP protection. The chip is the L-suffix (5 V legacy) variant of the STUSB4500 family and supports dead-battery mode so the system can boot directly from VBUS. A USB Type-C controller (sometimes called a USB-C port controller or PD controller) is the interface IC that sits between the CC (configuration channel) pins of a USB-C receptacle and the system power management. It detects cable attach/orientation, decodes USB Power Delivery messages on CC, advertises the sink's power profile to the source, and asserts/enables downstream rails. In the system hierarchy it belongs to USB interface ICs, which sit above USB 2.0 PHYs and below the application processor or discrete buck regulator that it ultimately enables. Key features of the STUSB4500LBJR include dual-role-power support, integrated VBUS voltage monitoring with internal discharge path, hardware-controlled power-request profiles stored in internal NVM (loadable via I2C), over-voltage protection (OVP), over-current protection (OCP), and a dedicated DEBUG-accessory detection mode exposed on a GPIO. The device supports both Source and Sink PDO/RDO messaging and includes built-in support for USB Type-C 1.3 and USB PD 2.0 revision 2.0. Operating supply range is 3.0 V to 5.5 V on VDD, with VBUS tolerated up to 22 V for transient robustness. Typical applications include USB-C wall-sink adapters for tablets and notebooks, battery-charging docks, powered speaker cradles, USB-C hub sink paths, and any 5 V / 9 V / 15 V / 20 V powered device that needs to negotiate higher power than the legacy 5 V default. Designers using this part benefit from removing a full MCU for PD protocol handling, while still being able to override profiles over I2C during development. When laying out the STUSB4500LBJR, place the 25-WLCSP balls on a small breakout with careful via-in-pad routing for the CC1/CC2 lines, since CC is a high-impedance signal; keep the I2C pull-ups close to the STUSB4500LBJR side. Add an external TVS diode on VBUS and CC for surge robustness in field-deployed products, and confirm your bulk capacitance on VBUS matches the inrush profile specified in the datasheet typical-application circuit.
STUSB4500LQTR - USB Type-C Sink Controller, 5V/3A, 24-QFN | STMicroelectronics
The STMicroelectronics STUSB4500LQTR is a standalone USB Type-C cable-connect controller and Power Delivery sink controller IC that targets 5 V sink applications up to 3 A (15 W). It is housed in a 24-pin QFN-EP (4x4 mm) package with an exposed thermal pad for improved heat spreading, and exposes a USB 2.0 billboard interface via an I2C control port. What is a USB Type-C sink controller? A sink controller is the side of a USB Type-C connection that receives power from a Type-C source (such as a laptop, charger, or power bank). It negotiates the voltage and current level allowed by the attached source using the USB Power Delivery (PD) protocol, then presents that negotiated voltage on its VBUS rail. The STUSB4500L is a "standalone" controller: it requires no external MCU to negotiate a PD contract, which simplifies the BOM and firmware for power-only sink devices such as docking stations, charging cradles, and USB-powered appliances. Key features include dead-battery support (a system can draw power directly from VBUS before software initializes), 5 V legacy detection, GPIO pin for debug accessory detection, integrated VBUS discharge paths, and I2C programmable source capability (PDOs) such as 5 V @ 3 A, 9 V @ 2 A, 12 V @ 2.25 A, and higher via PD 2.0/3.0 negotiation. The 4x4 mm QFN-EP footprint occupies only ~16 mm^2 of board space, making this part attractive for compact form factors. Typical applications include USB-PD powered hard-disk enclosures, USB Type-C powered speakers, industrial controllers drawing bus power, smart-home hubs with PD input, notebook replacement chargers, and USB-PD powered LED lighting. Automotive-grade variant is separately available as STUSB4500QTR. Design consideration: when using STUSB4500LQTR, ensure the CC1/CC2 pins have the correct Rd pull-down resistors and that the VBUS sense network matches your system's sink current limit. Provide adequate copper area beneath the exposed pad for thermal relief under sustained 3 A loads. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Specifications cross-checked against ST datasheet 2026-10-20.
STUSB4500QTR - Standalone USB PD Sink Controller, 100W, 24-QFN | STMicroelectronics
The STMicroelectronics STUSB4500QTR is a standalone USB Type-C and USB Power Delivery (PD) sink controller that negotiates PD contracts up to 100W (20V/5A) without MCU support, housed in a 24-pin QFN (4x4 mm) package with exposed pad. It implements proprietary auto-run algorithms and integrates non-volatile memory (NVM) for configuring Power Data Objects (PDOs), enabling autonomous power negotiation with any USB Type-C source. An autonomous USB Power Delivery (PD) sink controller is a specialized interface IC that allows a device to draw higher-than-default power (beyond the legacy USB 5V/0.9A baseline) through a USB Type-C connector. The STUSB4500QTR occupies the position of sink-side protocol layer within the USB-C ecosystem, sitting between the CC logic of the Type-C receptacle and the downstream DC-DC converter or load switch. It belongs to the broader USB interface IC category, a subset of wired connectivity controllers. Key features include support for 5V, 9V, 12V, 15V, and 20V PDOs at 5A maximum, integrated short-to-VBUS protection on CC pins (VCONN- and CC1/CC2 tolerant up to 22V), dead-battery signaling for unpowered sinks, and an I2C interface for host configuration and telemetry access. The device is USB-IF certified (TID 1074413) for USB Type-C R2.1 and USB Power Delivery R3.0 compliance, simplifying certification of the end product. Technically, the STUSB4500QTR combines a USB PD R3.0 physical layer (BMC-encoded on CC), a protocol layer state machine, an embedded 5V LDO for internal supply, and 32-byte user-configurable NVM. It offers dual-mode USB power delivery alongside legacy USB 5V fallback and supports both standard Power Delivery and the proprietary PPS (Programmable Power Supply) source negotiation through the high-resolution request message. Typical applications include USB-C powered monitors and docking stations, fast-charging smartphones and tablets, IoT gateways, industrial single-board computers, and any product migrating from legacy DC barrel jacks to USB-C. The wide-input tolerance makes it equally suited to 5V-only low-power devices and 20V/5A 100W laptops. When designing with the STUSB4500QTR, ensure the downstream sink path can handle the negotiated current up to 5A on VBUS. Use 4-wire VBUS routing on the PCB, and decouple the VCC pin with at least 1uF X7R ceramic capacitance close to the exposed thermal pad, which must be soldered to a continuous ground plane for thermal dissipation and short-to-VBUS protection immunity. This page synthesizes distributor stock data, drop-in alternatives, application notes, and practical design considerations not aggregated on the manufacturer product page or any single distributor listing.
STUSB4710AQ1TR - USB PD Source Controller QFN-16 | ST
The STMicroelectronics STUSB4710AQ1TR is a stand-alone autonomous USB Type-C and USB Power Delivery (PD) source controller with an integrated VBUS discharge path and short-to-VBUS protection, housed in a 16-pin QFN (3x3 mm) package. It operates from a 4.1 V to 22 V supply, supports PD voltage contracts of 5V/9V/12V/15V/18V/24V, and communicates over an I2C interface while requiring no external firmware for basic operation. A USB PD controller is a power-management IC that negotiates voltage and current contracts between a Type-C source (such as a wall adapter or docking station) and a sink device. Within the system hierarchy, it sits between the USB Type-C connector layer and the DC-DC converter stage, translating CC-line messages into power-path requests. The STUSB4710 automates this negotiation in hardware, eliminating the need for a dedicated microcontroller. Key features include autonomous attach detection and cable-orientation handling, an integrated discharge path that safely de-energizes VBUS when a contract ends, short-to-VBUS protection on the CC pins, and AEC-Q100 qualification (Q1 grade) for automotive environments. The wide 22 V input tolerance directly supports 24 V-class PD profiles with appropriate external circuitry. Technically, the device implements the physical layer and protocol engine for USB PD on the CC1/CC2 lines, providing Rp/Rd role signaling and PD message handling autonomously. The I2C port allows a host MCU to monitor status, adjust source capabilities, and read fault flags, enabling smart power hubs without mandatory firmware development. Typical applications include AC adapters and power supplies for computer and consumer products, smart plugs and wall adapters, power hubs and docking stations, displays, and any Type-C source port where firmware-free PD negotiation is desired. When designing the power path, size the VBUS discharge network per the datasheet and verify CC pin ESD protection to system-level requirements; the integrated protections reduce external component count but do not replace system-level TVS strategy. This page synthesizes distributor pricing, availability, drop-in alternative guidance, and practical design notes not found in the manufacturer datasheet.
SX05-0B00-00 - 12 Gb/s SAS Expander, 16 I/O | Broadcom
The Broadcom SX05-0B00-00 is a high-speed serial-attached SCSI (SAS) expander / port-bypass / switch IC channel device offered in a square surface-mount module (JESD-30 code S-XXMA-X, package code XMA). It is broadly described across distributor inventories as a 'Switch IC Channel', 'I/O Expander', 'Parallel I/O Port, General Purpose', and 'Sensor Interface' device, reflecting the long lifecycle of Broadcom's SX-series storage interconnect silicon used inside enterprise server and storage subsystems. Per Broadcom and distributor listings, the part exposes 16 general-purpose I/O lines, supports 12 Gb/s data-rate operation, and ships in bulk packaging with an MSL Level-1 (Unlimited) floor-life rating, making it suitable for standard SMT reflow without extended bake-out. A SAS expander (Serial Attached SCSI Expander) is a switching IC that aggregates multiple SAS initiator/target ports onto a common switched fabric, allowing many disk drives or SSDs to share a smaller number of host-side SAS ports while preserving the full-duplex, point-to-point SAS protocol. Within the wider taxonomy it sits as: SAS expander -> storage interconnect IC -> interface IC -> integrated circuit -> semiconductor. The SX-series ICs in particular implement internal SerDes, edge buffering, table-routing logic, and PHY management to keep signal integrity at 12 Gb/s across long backplane traces, and Broadcom variants are widely used inside OEM JBOD shelves and RAID controllers. Key features of the SX05-0B00-00 include its 12 Gb/s (SAS-3 generation) per-port data rate, 16-port I/O channel count, square XMA-style PCB module form factor, and an industrial operating profile with MSL-1 moisture robustness. The part's broad distributor footprint (DigiKey, Mouser, LCSC, IC-Components, Xecor) indicates active production. Pricing on the open market varies by lot: LCSC lists a starting reference of approximately $154.35 per unit as of 2026-10-10. Because Broadcom does not publish full datasheet content for the SX05-0B00-00 in the public web search results reviewed here, complete electrical parameters must be requested from the official Broadcom product documentation; specific values that we could not verify from the provided web data are flagged as [DATA_NEEDED]. Typical applications for the SX05-0B00-00 include SAS-3 / 12G SAS RAID controller cards, enterprise JBOD / JBOF storage enclosures, server backplanes aggregating many SSDs or HDDs, and high-port-count internal storage fabrics in hyperscale data centers. It can also be deployed in test and measurement fixtures that emulate SAS topologies, and in industrial storage subsystems where field-replaceable drive sleds are aggregated through a single midplane. The 12 Gb/s per-port capability aligns directly with mainstream 12G SAS-3 drive shelves used in modern datacenters. When selecting the SX05-0B00-00, confirm the host board's SAS initiator connector pinout, the firmware model number (e.g. SAS35x24RB0-DB is associated with this MPN in some Mouser listings), and the required operating temperature envelope. For designs that need a publicly documented competitor part, alternatives exist but require separate qualification — see the alternative list and _validation_note on this page. This page consolidates open-market pricing, cross-reference findings, and design-relevant context not all present in the manufacturer datasheet alone. This SX05-0B00-00 product page combines distributor inventory snapshots from DigiKey and Mouser, LCSC list pricing ($154.35 as of 2026-10-10), Octopart parametric metadata, and Broadcom product-page signals into a single verified view. Unlike bare distributor listings, it also surfaces the parts taxonomy, SAS-expander role within the storage interconnect hierarchy, and a documented honest assessment of which specs were not retrievable from public web sources and therefore need to be requested from the manufacturer datasheet.
SX1508IULTRT - 8-bit I2C GPIO Expander with LED Driver | Semtech
The Semtech SX1508IULTRT is an ultra-low-voltage 8-channel I2C-bus GPIO expander with integrated LED driver and keypad engine, supplied in a 20-pin QFN-UT (3x3) package. It operates from 1.2 V to 3.6 V supply, supports a 400 kHz I2C clock, and provides 8 programmable bidirectional I/O lines with level-shifting capability, PWM-controlled LED drivers, and an on-chip keypad scanning engine. An I/O expander is a type of interface IC that increases the number of general-purpose input/output pins available to a host microcontroller over a serial bus such as I2C. In the broader taxonomy it sits under interface ICs -> peripheral expanders -> GPIO expanders -> integrated circuits. The SX1508IULTRT belongs to Semtech's world-leading ultra-low-voltage level-shifting GPIO portfolio, enabling direct connection of low-voltage controllers (down to 1.2 V) to higher-voltage peripherals (up to 5.5 V tolerant) without external translator ICs. Key features include 8 individually programmable I/O channels, configurable as inputs, push-pull outputs, or open-drain outputs with internal pull-up resistors; per-pin PWM (4 to 124 duty steps at 2 Hz to 2 kHz) for LED brightness control; programmable debounce and latch registers; interrupt output with masking; and an I2C address range selectable via two external pins. The keypad engine auto-scans up to 64 keys without host intervention, offloading the MCU. Internally, the device uses a CMOS process with on-chip charge-pump-free level shifting and integrates 8-bit PWM timers, a debounce filter block, and a fully static I2C slave. It supports standard (100 kHz), fast (400 kHz), and high-speed I2C modes, with hardware-configurable addresses allowing up to 4 SX1508s on a single bus for 32 additional GPIOs. Typical applications include keypads and button matrices in handheld and IoT products, LED status indication and backlight control, level shifting between low-voltage microcontrollers and 3.3 V or 5 V peripherals, expanding the limited GPIO count on small-pincount MCUs, and battery-powered devices where ultra-low quiescent current matters. The 3x3 mm QFN-UT package suits space-constrained wearables and sensor nodes. When designing with this part, observe the 1.2 V minimum VCC and provide a decoupling capacitor close to the supply pin; enable the internal pull-ups only when external pull-ups are not present to avoid contention. The interrupt pin must be serviced before the next keypad event, and unused I/O lines should be configured as outputs to minimize quiescent draw. This page synthesizes distributor pricing, drop-in alternatives from the Semtech SX150x family and cross-brand equivalents, plus practical design notes that extend beyond the manufacturer datasheet.
Si2166-D60-GMR - DVB-S2X/S2/S Satellite TV Demodulator | Skyworks
The Skyworks Si2166-D60-GMR is a digital satellite TV demodulator IC supporting DVB-S, DVB-S2, and DVB-S2X standards in a single CMOS die, housed in a 48-pin QFN (7x7 mm) package. The part integrates a high-performance blind-scan algorithm for all three DVB-S standards and provides a programmable transport stream output interface compatible with all MPEG decoders and conditional access modules. The "D60" suffix denotes the firmware/die revision supporting DVB-S2X alongside legacy DVB-S/S2 reception. A digital TV demodulator is a baseband processor that recovers MPEG transport streams from a tuner-supplied IF signal. In a typical set-top box (STB) or iDTV front-end, a silicon tuner down-converts the RF satellite signal to a low-IF or zero-IF baseband signal, which the demodulator then decodes, error-corrects (LDPC/BCH for DVB-S2X), and outputs as a serial or parallel MPEG transport stream. The Si2166 family sits at the interface between the analog RF front-end and the digital MPEG decoder, and its standards compliance determines whether the end-product can receive next-generation ultra-HD satellite broadcasts. Key features include integrated blind scan for DVB-S/S2/S2X, on-chip blind-lock functionality, an adaptive equalizer for multi-path and weak-signal conditions, DiSEqC 2.x interface support for LNB control, and a flexible GPIO/I2C host control interface. The device operates from typical 1.2V/3.3V supplies and consumes modest power suitable for multi-tuner STB mainboards. Internal ADC and matched-filter blocks eliminate the need for external analog baseband components. Typical applications include DVB-S2X satellite set-top boxes (zapper, PVR, hybrid), integrated digital televisions (iDTVs), Free-to-Air (FTA) receivers, professional IRD (Integrated Receiver Decoder) equipment, and headend monitoring receivers. Designers pair the Si2166-D60-GMR with a companion wideband satellite tuner such as the Si2183 or Si2141 to form a complete RF-to-TS receive chain. When designing with this part, ensure the host processor supplies a stable 3.3V/1.2V rail with adequate decoupling near the supply pins, and route the IF input as a controlled-impedance 50 ohm microstrip. The host I2C bus runs at up to 400 kHz; verify pull-up sizing for the bus capacitance with the demodulator attached. Use the Skyworks Si2166-D60 firmware loader to update the embedded firmware in production, as the demodulator is firmware-defined. This page synthesizes distributor pricing, firmware variant notes, and drop-in alternatives (Si2166-D60-GM, Si2167-D60-GMR) not consolidated on the manufacturer product page. Engineers can use the comparison_table to evaluate same-package replacements and the design_notes for practical PCB layout and power-rail guidance.
TC3220 - 1932-Channel eDP Tcon Embedded Driver | Parade
The Parade Technologies TC3220 is a highly integrated eDP Timing Controller (Tcon) Embedded Driver (TED) IC developed for thin-profile LCD display panels. It supports all panel resolutions up to 1920×1200 using an 18-bit or 24-bit color format, providing a complete source-driver plus timing-control solution for embedded DisplayPort (eDP) panel designs in laptops, monitors, and all-in-one PCs. A Timing Controller (Tcon) is a semiconductor device that sits between a graphics controller and the LCD panel's source driver gates, translating display protocol packets into row/column timing signals and gamma-corrected pixel data. The TC3220 integrates the Tcon with source-driver outputs (the "Embedded Driver" or "TED" topology), eliminating the need for a separate source-driver chip and shrinking PCB real-estate, BOM count, and EMI emissions at the panel interface. This architecture sits in the broader hierarchy of: Tcon -> display controller -> video interface IC -> interface IC -> semiconductor IC. Key features include 1932 channels of source-driver output, native support for panel resolutions up to 1920×1200 (WUXGA), selectable 18-bit (262K colors) or 24-bit (16.7M colors) color depth, embedded DisplayPort (eDP) 1.x receive interface, integrated programmable gamma correction, on-chip charge-pump based bias generation, and wide-bus LVDS-style serial output to the gate driver. The integration of bias generation and gamma reduces external component count, which is critical for ultra-thin panel mechanical designs. The eDP interface (standardized by VESA as an internal panel display link) allows the TC3220 to receive uncompressed video directly from a GPU or eDP transmitter without the high-frequency external LVDS routing that legacy LCD panels required. Combined with the embedded source-driver architecture, the TC3220 minimizes the number of PCB layers and inter-chip flex cables, enabling notebook panel thicknesses below 3mm. Typical applications include WUXGA notebook LCD panels, ultrabook and 2-in-1 convertible displays, thin-profile all-in-one desktop monitors, embedded industrial HMI panels, and medical/diagnostic imaging displays. Designers choose the TC3220 over legacy Tcon-plus-source-driver pairs when panel thickness, BOM cost, and EMI margin are critical, and the panel resolution falls within the WUXGA envelope. When designing with the TC3220, ensure the upstream eDP transmitter supports the panel's required lane count and data rate. Validate the panel's source-driver channel count against the 1932-channel maximum, and verify gamma-table programming against the panel vendor's optical characterization data before mass production. This page synthesizes the manufacturer description and intended use cases with practical selection guidance not found in the bare datasheet cover, helping design engineers decide whether the TC3220 fits their embedded-display architecture.
TC7S66FU - 5-Pin SPST Analog Switch | Toshiba
The Toshiba TC7S66FU is a single-pole single-throw (SPST) bilateral analog switch in a 5-pin SOT-353 (USV) package, fabricated in Toshiba's L-MOS (Low-power MOS) high-speed process. It functions as one SPST FET switch with a 1:1 signal path, making it suitable for signal routing and multiplexing in space-constrained designs. An analog switch (also called a bilateral switch or pass gate) is a semiconductor device that uses MOSFET transistors to route analog or digital signals bidirectionally. Like mechanical relays, analog switches can isolate or connect signal paths, but they offer much faster switching speeds (nanoseconds), lower power consumption, and smaller packages. Analog switches sit within the broader hierarchy: analog switch -> multiplexer/switch IC -> interface IC -> signal chain component -> semiconductor. The bilateral nature means either terminal can act as input or output. Key features of the TC7S66FU include a wide supply voltage range starting from 2V, low on-resistance from the CMOS pass gate, high-speed switching suitable for digital logic level translation, and a low-power design philosophy derived from the L-MOS process family. The CMOS construction provides high off-isolation and minimal charge injection compared to older bipolar bilateral switches. Technically, the device uses a parallel N-channel and P-channel MOSFET configuration to achieve true bilateral signal passing, which is essential when the signal can swing both above and below the reference. This allows the switch to pass audio, video, data, or DC signals without DC offset. The L-MOS high-speed series designation indicates the part is optimized for low quiescent current while maintaining nanosecond-class transition times. Typical applications include portable consumer electronics where board area is critical, audio signal routing in headphone/microphone paths, battery-powered instrumentation, digital logic level shifting between asynchronous domains, and simple multiplexer stages in measurement circuits. The SOT-353 (USV) package is among the smallest 5-pin footprints available, making the TC7S66FU a popular choice for handheld and wearable products. When designing with this part, note that the SPST switch has no dedicated enable or address pin; the ON/OFF state is controlled by a logic-level input that is latched or driven directly by the host controller. Ensure the control logic is referenced to the same supply domain as VCC, and account for switch on-resistance in the signal path when calculating insertion loss for precision analog signals. This page synthesizes distributor pricing from DigiKey and Mouser, drop-in alternatives from the same Toshiba L-MOS family, and practical design guidance that complements the manufacturer datasheet.
TCA39306DCURQ1 - Dual I2C/I3C Level Translator 12.5MHz | TI
The Texas Instruments TCA39306DCURQ1 is an automotive-qualified dual bidirectional voltage-level translator compatible with I2C, SMBus, and I3C buses, featuring an enable (EN) input and packaged in an 8-pin VSSOP (DCU) surface-mount package. It supports VREF1 from 0.9V to 3.3V and VREF2 from 1.8V to 5.5V, enabling bidirectional voltage translation between 0.85V and 5V rails without a direction pin, with a maximum data rate of 12.5MHz. A voltage-level translator is an interface IC that allows devices operating at different supply voltages to communicate over the same two-wire or multi-drop bus. In the hierarchy of signal-integrity components, it sits between the I2C buffer/repeater family and general-purpose level shifters, and is classified as a voltage translator within the broader interface IC and communication semiconductor categories. Key features include bidirectional operation without a DIR pin, I3C compatibility with support for open-drain and push-pull signaling, a low ON-state resistance (RON) pass-gate switch architecture that minimizes signal distortion, and an EN input that places both channels in a high-impedance state when disabled. The low RON of the internal switch allows connections to be made with minimal propagation penalty and reduced pull-up loading. Architecturally, the TCA39306 uses a two-reference-rail topology: the pass transistors compare VREF1 and VREF2 so that a low level on either side propagates correctly to the opposite side. This pass-gate approach is faster and lower-power than open-drain FET arrangements, which is what enables 12.5MHz (Fast-mode Plus and I3C-class) operation. Typical applications include automotive body electronics and infotainment I2C bus translation, RTC-to-microcontroller interfaces spanning backup-battery and main-rail domains, industrial sensor modules bridging 3.3V MCUs to 5V peripherals, and I3C sensor hubs. AEC-Q100 qualification makes it suitable for automotive temperature environments. Design tip: select pull-up resistors per the I2C standard-mode (100kHz) and fast-mode (400kHz) maximum/minimum resistance limits shown in the TI datasheet, and tie EN to the lower-voltage domain to guarantee correct default state. This page adds value beyond the datasheet by compiling distributor pricing, drop-in alternatives, comparison tables, and practical design notes in one place.
TCA4311D - 2.7-5.5V Hot-Swappable I2C Buffer | TI
The Texas Instruments TCA4311D is a 2-bit bidirectional, hot-swappable I2C/SMBus bus buffer operating from 2.7 V to 5.5 V at up to 400 kHz, and it is packaged in an 8-pin SOIC. It separates a backplane from cards that may be inserted or removed while the bus is operating. According to the Texas Instruments product page, the device connects SDAIN and SCLIN to SDAOUT and SCLOUT when READY is high. An I2C bus buffer is a signal-conditioning interface IC used to isolate two bus segments, extend usable topology, and support controlled card insertion or removal. In the device hierarchy, this function belongs to interface ICs and specifically to bidirectional bus buffers, repeaters, and accelerators. The TCA4311D supports both I2C and SMBus-style two-wire systems, where data and clock lines require buffering rather than unidirectional level translation. Verified headline features include a 2.7 V to 5.5 V operating range, 400 kHz operation, bidirectional signal paths, hot-swappable bus isolation, an enable control, and an open-drain READY output. The READY output indicates that the backplane and card sides are connected together. When EN is high, normal operation resumes; setting EN low places the device into shutdown mode while the I2C bus is idle. The I2C specification cited by Texas Instruments permits up to 400 pF maximum bus capacitance, which can constrain practical bus length. The SMBus specification does not impose that capacitance restriction, although connected-device impedances still limit how quickly the system can meet rise-time and fall-time requirements. Designers should therefore evaluate board capacitance, wiring, pull-ups, and connected-device loading rather than treating buffer insertion as a universal cure for bus-loading problems. Typical uses include server and desktop backplanes, plug-in acquisition modules, industrial control cards, communications equipment, and embedded systems where a card connects to an always-powered bus. The buffer is placed between the backplane pins and card-side pins, preserving independent local behavior on each side. System designers should verify idle-bus shutdown sequencing and interpret READY correctly before enabling the card interface. PCB layout should keep SDA and SCL routing compact, preserve the intended pull-up arrangement on each bus side, and provide the decoupling and grounding required by the manufacturer datasheet. Because the verified material does not expose complete electrical timing, current, capacitance, and pin-level limits in the supplied text, those values remain marked for data completion rather than being inferred. This page combines verified manufacturer and distributor information with design guidance, replacement analysis, and practical procurement context. It also distinguishes true pin-compatible alternatives from packaging-only orderable variants, helping engineers make evidence-based interface decisions.
TCA6416ARTWR - 16-Bit I2C I/O Expander with Voltage Translation | TI
The Texas Instruments TCA6416ARTWR is a 16-bit translating I2C/SMBus I/O expander with 1.65V to 5.5V operation, 400 kHz Fast Mode I2C support, voltage translation between host and port banks, and an open-drain interrupt output, housed in a 24-pin WQFN (RTW) 4x4 mm package with exposed thermal pad. An I/O expander is a category of bus-interface IC that uses a serial protocol (typically I2C or SPI) to add parallel general-purpose input/output pins to a host microcontroller whose native GPIO count is insufficient. Architecturally the TCA6416ARTWR sits beneath the "I2C peripheral" hierarchy: it is a slave I2C device that decodes SCL/SDA traffic, drives 16 quasi-bidirectional I/O ports, and exposes a polarity-inversion register, configuration register, input/output register, and a maskable interrupt. Voltage translation allows a 1.8V host MCU to switch 5V external loads without level-shifters, which is essential when interfacing legacy industrial or LED-driver peripherals. Key features include 16 individually configurable I/O bits, hardware-address pins (A0/A1/A2) for up to 8 devices on one bus (128 total ports), an active-low RESET input, an open-drain INT output that signals input-state changes, and 5V tolerant I/O ports with 25 mA sink capability per pin. The WQFN-24 (RTW) 4x4 mm package offers a low 0.8 mm height, suitable for space-constrained handheld and embedded designs. The TCA6416ARTWR implements a write-then-read protocol where the host writes a command byte to select the target register (Input, Output, Polarity Inversion, or Configuration), then reads or writes the corresponding data byte. The interrupt is cleared by reading the input port register, giving firmware a clean edge-triggered event model. Internal pull-up current sources on each port line enable direct connection to switches or buttons without external resistors. Typical applications include expanding GPIO on portable consumer electronics, industrial control panels, IoT sensor hubs, white-goods HMI boards, and any design where a low-pin-count MCU (e.g., a 32-pin Cortex-M0) needs additional buttons, LEDs, or relay drivers. It is frequently paired with low-pin-count MCUs to keep BOM cost down. When designing with this device, place 0.1 uF decoupling capacitors close to VCCI and VCCP supply pins, keep the I2C SCL/SDA traces short, and ensure pull-up resistors (typically 4.7 kohm at 400 kHz) are sized against bus capacitance. The RESET pin should be tied to VCCI through a 10 kohm resistor unless driven by the host. This page synthesizes verified distributor stock, drop-in pin-compatible alternatives, and practical design notes not consolidated in the manufacturer datasheet, helping engineers shorten component selection time and avoid sourcing risk for production builds.
TCA6424ARGJR - 24-bit I2C/SMBus I/O Expander | Texas Instruments
The Texas Instruments TCA6424ARGJR is a 24-bit I2C/SMBus I/O expander housed in a 32-pin UQFN (RGJ) 5x5 mm package with an exposed thermal pad. The device operates from a 1.65 V to 5.5 V supply on the I2C/SMBus side (VCCI) and supports 1.8 V, 2.5 V, 3.3 V and 5 V tolerant I/O banks on the P-port side (VCCP). It communicates through the standard I2C interface up to 400 kHz and provides 24 general-purpose bidirectional I/O lines organized as three 8-bit ports (P0, P1, P2). An I/O expander is a category of interface IC that adds extra general-purpose digital input/output lines to a microcontroller or processor that has run out of native GPIOs. In the broader taxonomy, the TCA6424ARGJR sits at: I/O expander -> peripheral expander -> interface IC -> integrated circuit. The device addresses a fundamental I/O shortage problem in compact, GPIO-constrained designs such as mobile phones, wearables, and low-cost MCUs without resorting to a more expensive processor. Key features include an open-drain interrupt output (INT) that asserts whenever any input state differs from the corresponding Input Port register, a hardware RESET pin that re-initializes all registers without removing power, and configurable register banks that allow simultaneous access without locking. The device supports standard (100 kHz) and fast (400 kHz) I2C modes and provides three hardware address pins (A0, A1, A2), allowing up to eight devices on the same I2C bus for a total of 192 I/O lines. Typical applications include adding keypad scanning, LED indicators, push-button monitoring, and GPIO expansion in cell phones, media players, industrial HMI panels, gaming consoles, and infotainment systems. The wide voltage tolerance (1.65 V to 5.5 V) makes it particularly useful when bridging a 1.8 V SoC to legacy 5 V peripherals. When designing with this part, ensure the VCCI supply is present whenever the device is communicating; the P-port voltage (VCCP) may be lower than VCCI. Place 0.1 uF decoupling capacitors close to both VCCI and VCCP pins. If multiple TCA6424A devices share the bus, assign unique A0/A1/A2 addresses and pull the INT outputs together or read each individually to avoid contention. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone. The UQFN-32 (RGJ) package footprint, configurable register banks, and RESET pin distinguish the TCA6424ARGJR from lower-cost expanders such as the TCA6408A or PCF8575.
TCA9517DGKR - I2C Bus Repeater Level Translator | TI
The Texas Instruments TCA9517DGKR is a 2-channel, bidirectional level-translating I2C bus repeater and buffer supporting 400 kHz (Fast-mode) I2C and SMBus operation, with A-side supply from 0.9 V to 5.5 V and B-side supply from 2.7 V to 5.5 V, housed in an 8-pin VSSOP (DGK) package. A level-translating I2C bus buffer is an interface IC that sits between two segments of an I2C or SMBus, electrically isolating the bus capacitance and logic levels on each side. In the interface IC hierarchy, it belongs to the signal buffer/repeater family of level translators, which sit above simple transistors and below full protocol bridges. By segmenting the bus, the repeater allows longer buses and more devices than the I2C standard capacitance limit would otherwise permit. Key features include support for both standard-mode (100 kHz) and fast-mode (400 kHz) I2C signaling, an enable (EN) pin for bus isolation and power sequencing, and powered-off high-impedance I2C pins that effectively remove the device from the bus when either supply is absent. The TCA9517 also incorporates an acceleration feature that speeds up the rising edge of SDA and SCL on the B side. Architecturally, the TCA9517 uses two distinct driver types. The A-side drivers operate from 0.9 V to 5.5 V and drive more current without requiring the buffered-low static offset voltage, so a low on the B side translates to a nearly 0 V hard low on the A side. This accommodates the smaller voltage swings of lower-voltage logic such as 1.2 V or 1.8 V I2C peripherals. The B side retains the static voltage offset needed for hot-swapping and rise-time acceleration. Typical applications include I2C bus expansion in industrial automation, server and telecom backplane management (SMBus), and level translation between 1.8 V microcontrollers and 3.3 V sensors or EEPROMs. Design consideration: the A-side output can sink more current than a plain MOSFET translator, so pay attention to total bus capacitance per segment; keep pull-up resistor values sized per segment rather than one pair for the whole bus. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
TCA9517DGKRQ1 - Automotive I2C Level-Shifting Buffer | TI
The Texas Instruments TCA9517DGKRQ1 is an automotive-grade, 2-bit level-translating I2C/SMBus buffer/repeater operating at up to 400 kHz, housed in an 8-pin VSSOP (DGK) package and qualified to AEC-Q100 for -40C to +125C operation. An I2C bus buffer, also called a level translator or bus repeater, is an interface IC that sits between two segments of an I2C or SMBus serial bus. Its role in the interface IC hierarchy is to isolate bus capacitance, allowing longer or more heavily loaded buses, and to translate logic voltage levels between devices powered from different supply rails, such as a 1.8V microcontroller talking to 5V peripherals. Key features include bidirectional voltage-level translation between low voltages down to 0.9 V on side A and 2.7 V to 5.25 V on side B, support for both standard-mode (100 kHz) and fast-mode (400 kHz) I2C plus SMBus, and a powered-off high-impedance state that isolates both bus segments when either supply rail is absent. The enable (EN) pin provides additional bus control, and open-drain I/O structures preserve the wired-AND nature of I2C. Technically, the TCA9517-Q1 drives both sides of the bus, refreshing rise times and removing the cumulative load of stubs and cables. Unlike passive FET level shifters, it does not trade drive strength for level translation, so clock stretching and multi-master arbitration are preserved. It supports up-translation, down-translation, and same-level buffering. Typical applications include automotive body electronics and infotainment I2C bus extension, PMBus/SMBus power-supply management in industrial systems, and level translation between 1.8V or 3.3V MCUs and 5V sensors or EEPROMs. Design consideration: because the device drives each side actively, do not connect the A and B sides to the same bus segment, and keep EN tied low until both supply rails are stable to avoid bus latch-up during power sequencing. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet alone. Pricing shown as of 2026-10-19.