ইন্টারফেস IC
উপশ্রেণী
পণ্য (2,200+)
USB2517I-JZX - 7-Port USB 2.0 Hub | Microchip (Tape & Reel)
The Microchip Technology USB2517I-JZX is a USB 2.0 seven-port hub controller with seven downstream ports, USB 2.0 compliance, and a 64-pin QFN package measuring 9 mm by 9 mm. It is designed for embedded USB systems requiring low-power, configurable hub expansion. The controller supports Low-Speed, Full-Speed, and Hi-Speed downstream devices when operating as a Hi-Speed hub, while its upstream attachment can operate as a Full-Speed or Full-/Hi-Speed hub. A USB hub controller is an interface semiconductor that manages traffic between one upstream USB host and multiple downstream devices. It belongs to the USB interface controller, interface IC, and connectivity semiconductor hierarchy. The USB2517 family uses MultiTRAK technology to support mixed-speed USB environments while helping embedded designs consolidate multiple peripheral connections behind one upstream host interface. The USB2517I is identified in the verified data as the industrial-temperature-rated member of the USB2517 family. Its 64-QFN 9 x 9 mm package supports compact embedded implementations, while the integrated hub function reduces the need for discrete USB routing and control components. The device is described by Microchip as low power and OEM configurable, making it suitable for system-level USB port expansion where firmware, hub configuration, and downstream-port requirements are controlled by the OEM. Typical embedded uses include industrial equipment, test systems, printers, storage appliances, communications equipment, and other products that need more USB connections than a host controller provides directly. Because USB2517I is a hub rather than a host controller, the system still requires an upstream USB host or host-capable controller. The hub’s downstream devices can include low-speed, full-speed, and hi-speed USB peripherals, subject to the operating mode and system configuration. Designers should verify the complete pinout, power requirements, crystal or clock implementation, port-enable behavior, and configuration requirements against the manufacturer datasheet before layout. The 64-QFN package also requires careful exposed-pad thermal and assembly planning. This page combines verified manufacturer, distributor, and datasheet information with practical design context; unsupported electrical details remain marked for data completion rather than inferred.
USB2517I-JZX-TR - 7-Port USB 2.0 Hub | Microchip
The Microchip Technology USB2517I-JZX-TR is a USB 2.0 seven-port hub controller with seven downstream ports, USB 2.0 compliance, and a 64-pin QFN package measuring 9 mm by 9 mm. It is designed for embedded USB systems requiring low-power, configurable hub expansion. The controller supports Low-Speed, Full-Speed, and Hi-Speed downstream devices when operating as a Hi-Speed hub, while its upstream attachment can operate as a Full-Speed or Full-/Hi-Speed hub. A USB hub controller is an interface semiconductor that manages traffic between one upstream USB host and multiple downstream devices. It belongs to the USB interface controller, interface IC, and connectivity semiconductor hierarchy. The USB2517 family uses MultiTRAK technology to support mixed-speed USB environments while helping embedded designs consolidate multiple peripheral connections behind one upstream host interface. The USB2517I is identified in the verified data as the industrial-temperature-rated member of the USB2517 family. Its 64-QFN 9 x 9 mm package supports compact embedded implementations, while the integrated hub function reduces the need for discrete USB routing and control components. The device is described by Microchip as low power and OEM configurable, making it suitable for system-level USB port expansion where firmware, hub configuration, and downstream-port requirements are controlled by the OEM. Typical embedded uses include industrial equipment, test systems, printers, storage appliances, communications equipment, and other products that need more USB connections than a host controller provides directly. Because USB2517I is a hub rather than a host controller, the system still requires an upstream USB host or host-capable controller. The hub’s downstream devices can include low-speed, full-speed, and hi-speed USB peripherals, subject to the operating mode and system configuration. Designers should verify the complete pinout, power requirements, crystal or clock implementation, port-enable behavior, and configuration requirements against the manufacturer datasheet before layout. The 64-QFN package also requires careful exposed-pad thermal and assembly planning. This page combines verified manufacturer, distributor, and datasheet information with practical design context; unsupported electrical details remain marked for data completion rather than inferred.
USB2524-ABZJ - USB 2.0 4-Port Switching Hub | Microchip
The Microchip Technology USB2524-ABZJ is a USB 2.0 multi-switch hub controller with two upstream host connections, four downstream ports, and a 56-QFN-EP surface-mount package measuring 8 mm by 8 mm. Its stated operating supply range is 3.0 V to 3.6 V, while USB 2.0 Hi-Speed operation supports 480 Mbps signaling. The controller provides electronic reconfiguration and reassignment of any downstream port to either upstream host on the fly. A USB hub controller is an interface integrated circuit that coordinates communication between one or more USB hosts and attached peripherals. In the broader hierarchy, USB2524-ABZJ belongs to the USB interface controller family, which sits within interface ICs and broader semiconductor devices. Unlike a conventional four-port hub with only one upstream connection, this device combines a Hi-Speed hub with switching logic so two hosts can share the same downstream device set. The USB2524 is identified by Microchip as the industry's first USB switching hub combining USB Hi-Speed hub and switching functions in one device. Its two upstream ports and four downstream ports enable USB device sharing, dynamic host ownership, and reassignment without physically moving equipment. All required resistors on the USB ports are integrated according to the manufacturer data sheet, reducing discrete termination content on the PCB. Operationally, the controller is intended to work with an external USB power-distribution switch device. That external device controls VBUS switching to downstream ports, limits current, and senses over-current conditions. The separation between data-port switching and power-distribution control allows a board designer to use a suitably rated power switch instead of integrating high-current switching entirely inside the 56-QFN controller. Typical uses include shared test benches, industrial peripheral-sharing systems, embedded equipment with multiple USB hosts, kiosk configurations, and automatic test equipment that needs a peripheral to move between hosts. The 3.0 V to 3.6 V supply range suits conventional 3.3 V digital systems, although the complete board must also meet USB signal-integrity, impedance, VBUS, and current-protection requirements. Layout is the principal implementation constraint for this 56-QFN-EP device. Differential USB data pairs require controlled impedance and minimized mismatch, while the exposed pad needs a deliberate thermal and ground strategy. Designers should also follow the manufacturer's USB layout guidance and confirm external power-switch selection, port-current budgets, EEPROM requirements, and all pin functions against the current USB2524 data sheet. This page consolidates the verified manufacturer and distributor information, distinguishes confirmed electrical facts from unspecified parameters, and provides application, sourcing, and design guidance. It also records the absence of a verified pin-to-pin substitute rather than presenting functionally similar or differently packaged USB controllers as drop-in replacements.
USB2602-NU-02 - USB 2.0 4-Port Hub Controller | Microchip
The Microchip Technology USB2602-NU-02 is a USB 2.0 compound-device controller that combines a three-port downstream USB hub and a Flash Card Media Controller in a 128-lead TQFP package. Its operating supply range is 3 V to 3.6 V, and the listed -NU-02 ordering code identifies the USB 2.0 interface, Flash Media, four-port hub configuration supplied in a 14 mm by 14 mm TQFP package. The controller is intended to sit between one upstream USB host and downstream USB devices while also supporting Flash media connectivity. A USB hub controller is an interface IC within the broader USB interface-controller and semiconductor hierarchy. It manages port connectivity, power distribution, and data transfer between an upstream host and downstream peripherals. A compound device combines multiple USB functions within one controller, allowing the USB2602 to provide hub and Flash media functionality without requiring a separate hub controller for each function. This integration can reduce board-level component count and simplify enclosure and product design. The USB2602 family supports xD Picture Card format for licensees, as stated by the manufacturer product page. Its USB 2.0 architecture targets host-side accessories, card readers, multifunction peripherals, and embedded USB products requiring a compact hub-and-media-controller solution. The supplied distributor records identify the component as a four-port hub controller and list DigiKey and Mouser as sources for technical data, pricing, and availability. The device operates from a 3 V to 3.6 V supply, allowing use with 3.3 V system rails. Because USB devices impose strict signal-integrity, enumeration, and current-management requirements, board implementation should follow the manufacturer reference design and recommended external-component layouts rather than treating the controller as a generic USB switch. Input and output impedance-controlled traces, short differential connections, solid ground planes, and careful separation between high-current and low-level data paths are particularly important in compact four-port implementations. Typical installations include USB 2.0 card readers, multifunction docking products, removable-media appliances, and compact embedded USB hubs. The integrated hub and Flash media functions are useful where one upstream connection must serve multiple USB peripherals while also reading Flash-based storage. Engineers should confirm host compatibility, supported media formats, electrical characteristics, and enclosure requirements against the current manufacturer documentation before production release. The principal design consideration is validating the complete USB power, firmware, and signal path rather than selecting the IC from headline hub features alone. The 3.3 V supply requirement, upstream and downstream routing, downstream-port current budget, Flash interface implementation, and mechanical package all affect whether the controller is suitable for a given product. This page combines manufacturer function data, distributor availability references, package information, sourcing links, and application-focused engineering guidance. It also distinguishes verified USB2602-NU-02 data from suffix variants whose detailed electrical and pin-level differences are not supplied in the source material, helping engineers make a safer procurement or replacement decision.
USB2642-I/ML - USB 2.0 Hub Card Reader | Microchip
The Microchip Technology USB2642-I/ML is a USB 2.0 high-speed hub and flash media card controller combination IC with two downstream USB ports and an SD/MMC interface, supplied in a 48-QFN 7 mm × 7 mm package. It operates from a 3.3 V supply and supports low-speed, full-speed, and high-speed USB devices. The integrated design combines USB expansion and flash media reader/writer functionality in one controller. A USB hub controller is an interface device that expands one host USB connection into multiple downstream ports while managing USB traffic and device connections. A flash media card controller provides read/write access to supported SD or MMC flash media. In the broader electronics hierarchy, the USB2642 belongs to interface ICs, USB interface controllers, USB 2.0 hub controllers, and combined flash media controllers. The principal verified features are USB 2.0 compliance, high-speed operation, two downstream USB ports, and one SD/MMC flash media card interface. Its 48-QFN package supports compact surface-mount designs, while the exposed-pad package construction provides a defined thermal and electrical land pattern. The device is intended for systems that need local USB port expansion together with removable flash-media connectivity. Typical uses include USB docking stations, compact desktop computers, consumer electronics, card-reader equipment, printers, storage accessories, and embedded USB peripherals. Because the controller consolidates hub and media-card functions, it can reduce the number of separate interface devices required in a compact system. Designers must still account for USB signal routing, connector protection, supply decoupling, card-detect wiring, and the exposed thermal pad when laying out the PCB. For USB2642-I/ML designs, confirm the exact pin functions, electrical limits, reference circuitry, and supported media details against the Microchip datasheet before release. USB high-speed pairs require controlled impedance and careful return-path continuity; card-interface traces should be kept away from noisy switching nodes. The part is not a general-purpose power semiconductor, so a Safe Operating Area chart is not applicable. This page combines the verified manufacturer and distributor information with package, application, procurement, and replacement guidance. It is intended to help engineers identify whether the USB2642-I/ML matches a USB hub plus flash-media architecture before committing the 48-QFN footprint to a PCB layout.
USB2642/ML - USB 2.0 Hub and Card Controller | Microchip
The Microchip Technology USB2642/ML is a USB 2.0 hi-speed hub and flash media card controller combo with 2 downstream USB ports and an SD/MMC interface, supplied in a 48-QFN package. It operates from a 3.3 V supply according to the verified distributor data. The device combines USB expansion and flash media reader/writer integration in one controller. A USB hub controller is an interface semiconductor that manages one upstream USB connection and distributes traffic to downstream ports. A flash media card controller adds access to removable memory through SD or MMC interfaces. The USB2642/ML therefore belongs to the USB interface IC hierarchy: USB controller, interface IC, semiconductor, and embedded connectivity device. The principal features are USB 2.0 high-speed operation, two downstream USB 2.0 ports, and an SD/MMC flash media interface. The verified manufacturer description also identifies the device as a cost-effective, energy-efficient, fully integrated solution. Its integrated design can reduce the need for separate hub and media-reader interface circuitry while supporting both USB expansion and card access. The USB2642/ML is suitable for compact USB hubs, card readers, multifunction peripherals, docking systems, and embedded USB storage products. According to the manufacturer product page, it provides a USB expansion and flash media reader/writer combination in a single chip. The datasheet search results additionally describe sustained flash-media transfer rates exceeding 35 MB/s, although the exact system throughput depends on the attached device and implementation. Designs must follow the manufacturer datasheet for decoupling, USB signal routing, card-interface layout, and exposed-pad thermal management. USB differential pairs should be routed with controlled impedance and minimized discontinuities. The SD/MMC interface and USB connectors should be placed to reduce signal coupling, while the power network should provide low-impedance return paths for both digital and high-current USB loads. This page consolidates the verified manufacturer and distributor information, procurement context, package details, and application guidance for USB2642/ML. It also distinguishes the available same-family Microchip variants without presenting unverified cross-brand replacements as drop-in equivalents.
USB2642T-I/ML - USB 2.0 Hub and Card Controller | Microchip
The Microchip Technology USB2642T-I/ML is a USB 2.0 high-speed hub and flash media card controller combination with two downstream USB 2.0 ports, a 3.3 V interface, and sustained flash-media transfer rates exceeding 35 MB/s. It is housed in a 48-pin 7 mm × 7 mm QFN package with an exposed pad and is designated for an industrial temperature range of -40°C to +85°C. A USB hub controller is an interface IC that expands one upstream USB connection into multiple downstream ports while managing USB traffic and attached-device power. A flash media card controller adds read/write access to removable flash storage through supported media interfaces. Combined, the USB2642 belongs to the broader USB interface controller hierarchy, where USB bus interfacing, port expansion, and storage-device connectivity are consolidated into one controller. The principal feature is integration: two USB 2.0 downstream ports and flash-media reader/writer functionality share one device rather than requiring separate hub and card-reader controllers. The manufacturer datasheet identifies USB 2.0 high-speed operation, support for eMMC, and sustained flash transfer rates exceeding 35 MB/s. The available part also lists I2C, SPI, and USB interfaces, providing configuration and connectivity options for embedded host systems. The USB2642 architecture is intended to place a USB host interface, downstream-port control, flash-media access, and supporting digital interfaces in one surface-mount IC. Its 48-QFN package provides a compact 7 mm × 7 mm footprint, but the exposed thermal pad requires careful PCB layout and adequate copper for heat dissipation. The -I ordering designation identifies the industrial -40°C to +85°C operating range shown in the comparison data. Typical uses include multifunction printers, set-top boxes, digital media systems, industrial HMI panels, and compact embedded USB systems that need both peripheral expansion and flash-card access. In such systems, the controller can connect storage media to an existing USB host while presenting two downstream USB ports for peripherals, reducing component count relative to separate controllers. The primary design consideration is power and signal integrity. Layout must preserve USB differential-pair routing, provide the decoupling and exposed-pad thermal structure required by the datasheet, and account for downstream-port current requirements. Designers should also verify card-format support, host-driver compatibility, firmware configuration, and connector protection before committing the USB2642T-I/ML to a new design. This page consolidates verified distributor pricing, package and interface details, manufacturer documentation, and a practical assessment of the limited directly verifiable drop-in alternatives. It also distinguishes confirmed USB2642 family variants from broader functional equivalents that cannot be represented as pin-compatible replacements without additional board-level verification.
USB2642T/ML USB 2.0 Hub and Flash Controller | Microchip
The Microchip Technology USB2642T/ML is a USB 2.0 high-speed hub and flash media card controller combo with USB, I2C, and SPI interfaces, supplied in a 48-QFN 7x7 mm package. It integrates USB expansion with flash-media reader and writer functionality, supporting low-speed, full-speed, and high-speed USB 2.0 devices. The device is identified by distributor listings as a specialized controller-interface IC with a 48-QFN package and exposed pad. A USB hub controller is an interface IC that expands one host USB port into multiple downstream connections while managing USB traffic and device attachment. The flash media card controller portion adds access to supported flash media formats, creating a compact bridge between a USB host, USB peripherals, and removable storage. This combination is useful in docking stations, embedded systems, printers, set-top equipment, and compact industrial controllers where board space and peripheral integration are important. The verified device data identifies USB 2.0 low-, full-, and high-speed operation, I2C and SPI interfaces, USB hub functionality, and flash-media controller functionality. The 48-QFN package provides a high pin count for integrated USB and storage connectivity, while the exposed pad supports thermal management on a suitably designed PCB. The exact supported media formats, electrical limits, operating-temperature range, and complete pin assignment are not provided in the supplied search data and must be confirmed from the manufacturer datasheet. Typical implementation places the USB2642T/ML between a USB host controller and downstream USB ports, with flash-media interfaces serving external storage devices. Firmware must configure the hub and media-access functions, while the host system supplies reference, clock, power, and I2C or SPI control. Designers should follow Microchip's USB routing, impedance, decoupling, and exposed-pad guidance rather than treating the QFN footprint as a generic package. The principal design consideration is signal integrity. USB high-speed edges require controlled impedance, short routing, continuous return paths, minimized stubs, and careful separation from noisy power and digital clocks. The exposed thermal pad must be connected to the intended ground or thermal plane according to the datasheet land pattern, and adequate decoupling must be placed close to the supply pins. This page combines verified manufacturer and distributor descriptions, practical USB design considerations, and explicit data gaps for parameters not present in the supplied source material.
USB2660I-JZX-03 - USB 2.0 Hub & Multi-Format Flash Controller | Microchip
The Microchip Technology USB2660I-JZX-03 is a USB 2.0 Hi-Speed hub controller combined with a multi-format flash media reader/writer and dual Secure Digital (SD) interfaces, integrated in a single chip. Per the Microchip USB2660/USB2660i datasheet (DS00001931B), this combo device delivers up to 480 Mbps Hi-Speed USB performance, two downstream USB 2.0 ports, and multi-format flash card support including SD, MMC, Memory Stick, and xD-Picture Card. The device is housed in a 64-pin QFN (JZX) 9x9 mm package with exposed thermal pad, designed for surface mount desktop and notebook PC applications. The industrial temperature grade (-40C to +85C) makes the USB2660I variant suitable for non-consumer embedded use cases where the commercial-grade USB2660 is insufficient. A USB 2.0 Hi-Speed hub controller is a category of USB peripheral that aggregates multiple downstream ports and card-reader functions behind a single upstream port, while a flash media controller is a class of storage interface IC that bridges a host processor to removable flash memory cards using standardized protocols such as SD, MMC, and MSPro. The USB2660I sits at the intersection of these two product types, forming part of the broader USB interface IC hierarchy: USB peripheral controller -> USB hub controller -> combo hub + media reader -> Microchip USB264x/2660 family. This combination reduces PCB area, BOM count, and design complexity for system integrators that would otherwise need a separate hub chip and card-reader chip. Key features of the USB2660I-JZX-03 include 2 downstream USB 2.0 Hi-Speed ports, an internal transaction translator for mixed-speed USB environments, multi-format flash card support with dual SD interfaces, integrated card power FETs, on-board 24 MHz crystal driver, and USB-IF certified hub silicon. The chip is USB 2.0 compliant and supports Suspend and low-power modes per the USB specification. Programmable through an external I2C EEPROM, the device enables custom vendor/product IDs, string descriptors, and manufacturer-specific behavior. Internally the USB2660I uses Microchip's proven UTMI+ compliant physical layer and a hardened Hi-Speed USB 2.0 hub topology that delivers industry-leading data throughput in mixed-speed environments where some downstream devices run at Full-Speed (12 Mbps) and others at Hi-Speed (480 Mbps). The integrated media controller supports USB Mass Storage class and SDIO bridging, enabling SDIO peripherals to enumerate over USB with custom firmware. Typical applications include desktop and notebook PCs, multi-function printers with card reader slots, docking stations, set-top boxes, and industrial panel PCs that expose SD card slots and multiple USB ports to end users. Designers use the USB2660I-JZX-03 to consolidate USB expansion and media reading onto a single 9x9 mm QFN. When designing with the USB2660I-JZX-03, allocate at least four PCB layers for clean USB signal routing, route the differential DP/DM pair as a 90-ohm impedance-matched pair, and provide a local 0.1 uF decoupling cap adjacent to every power pin. The exposed thermal pad must be soldered to a contiguous ground pour to meet USB-IF Hub Certification thermal-rise limits.
USB3320C-EZK - Hi-Speed USB 2.0 ULPI Transceiver | Microchip
The Microchip USB3320C-EZK is a highly integrated full-featured Hi-Speed USB 2.0 transceiver built on the proven ULPI (UTMI+ Low Pin Interface) standard, housed in a 32-pin QFN (5x5 mm) package. It supports 480 Mbps High-Speed and 12 Mbps Full-Speed USB signaling, operates from a single 3.3 V supply with on-chip 1.8 V LDO regulator, and provides up to +30 V VBUS ESD protection on the USB connector side. A USB 2.0 transceiver (also called a PHY) is the physical-layer analog block that sits between a digital SoC's ULPI/UTMI link and the differential DP/DM lines of a USB connector. It handles HS chirp, packet detection, serializer/deserializer, and clock recovery, while leaving link-layer protocol to the host controller. Within the system hierarchy, the USB3320C-EZK is a peripheral controller companion IC: SoC (application processor) -> ULPI link -> USB3320 PHY -> DP/DM -> USB connector. This split architecture lets designers pair an inexpensive PHY with any SoC that exposes ULPI pins (NXP i.MX, ST STM32, Xilinx Zynq, TI Sitara). Key electrical characteristics include 480 Mbps Hi-Speed data rate, internal 1.8 V regulator eliminating external LDO, integrated 45 ohm HS termination resistors (no external Rs needed), 8-bit single-data-rate ULPI interface with 60 MHz reference clock, and integrated USB charger-detection hardware. The device is USB 2.0 specification compliant, USB Battery Charging v1.2 capable, and OTG-ready via the ID pin. The architecture uses a 60 MHz reference clock input (REFCLK) generated by the SoC, an internal PLL multiplies to 480 MHz for HS operations. A digital state machine handles UTMI/ULPI command interpretation, while the analog block performs line termination, current-mode driver bias, and disconnect detection. The chip supports both host and peripheral roles. Typical applications include USB 2.0 device/host ports on single-board computers, OTG ports on industrial tablets, automotive infotainment USB interfaces, medical device USB ports, and 5G/LTE modem modules with USB 2.0 diagnostic channels. Designers favor the USB3320C-EZK over UTMI-only PHYs because ULPI slashes pin count to 12 versus UTMI's 30+. When designing with this device, maintain 90-ohm differential impedance on DP/DM traces to the connector, place decoupling capacitors on VDD33/VDD18/VBAT as close as possible to the IC, and ensure the REFCLK signal has less than 50 ps jitter to pass USB compliance. Do not omit the ID pin pull-up for OTG or charger-detection operation.
USB3803 - 3-Port USB 2.0 Hi-Speed Hub Controller | Microchip
The Microchip USB3803 is a three-port USB 2.0 Hi-Speed hub controller optimized for portable, battery-powered embedded systems, integrating BC 1.1 charger detection, flexible internal power regulators, and a 25-ball WLCSP package. It connects to an upstream port as a Full-Speed or Hi-Speed hub and supports Low, Full, and Hi-Speed downstream devices on all enabled ports. The device targets tablets, smartphones, and other mobile platforms where small footprint, low standby current, and minimal BOM are critical design constraints. A USB hub controller is a dedicated interface IC that aggregates multiple downstream USB ports behind a single upstream port, handling transaction translation, port power control, and suspend/resume signaling. In the broader USB-IF taxonomy, hubs sit between hosts (root hubs inside PC chipsets) and peripherals, implementing Chapter 11 of the USB 2.0 specification. The USB3803 belongs to the "embedded hub" sub-category, optimized for integration into battery-powered devices rather than stand-alone retail hubs. Key features include 480 Mbps Hi-Speed upstream support, integrated USB-IF Battery Charging 1.1 detection on the upstream port, integrated 5V-to-3.3V and 1.8V regulators, a serial slave (I2C) interface for status/configuration, and ultra-low standby and bypass current modes. The WLCSP-25 package measures only 2.0 x 2.0 mm, enabling placement on space-constrained mobile mainboards. Microchip's Bypass mode (USB3803C variants) reduces quiescent current to single-digit microamperes when the host is off, directly extending battery life. Architecturally, the USB3803 integrates a Hi-Speed UTMI/ULPI-less PHY, a serial interface engine (SIE), per-port transaction translators, and the charger-detection analog block. The on-chip regulators remove the need for external LDO components when powered from a single 5V VBAT rail, further shrinking BOM count. The I2C serial slave interface exposes charger-status and configuration registers, allowing the application processor to query attach type, port power status, and override default settings. Typical applications include tablets and 2-in-1 laptops requiring one USB-A expansion port, smartphone accessories with OTG-to-host bridging, portable medical devices, and embedded infotainment head units. The charger-detection block also enables the device to act as a charger-sensing front-end, reporting Standard Downstream Port (SDP), Charging Downstream Port (CDP), or Dedicated Charging Port (DCP) classification back to the application processor over I2C. When designing with this part, allocate adequate PCB area under the WLCSP for the exposed die pad and route the 90-ohm differential USB pairs with controlled impedance. Microchip's USBCheck online design review service is available free of charge to qualified customers using the USB3803 in production designs. This page synthesizes distributor stock, application-grade alternatives, and practical layout notes not found in the manufacturer datasheet, giving embedded engineers a single decision-ready reference.
USB5742/2G - 2-Port SS/HS USB 3.1 SmartHub Controller | Microchip
The Microchip USB5742/2G is a 2-port, low-power SuperSpeed/Hi-Speed USB 3.1 Gen 1 SmartHub hub feature controller with 2 downstream ports, housed in a 56-pin VQFN (7x7 mm) package with exposed thermal pad. It supports USB 3.1 SuperSpeed (5 Gbps), USB 2.0 Hi-Speed (480 Mbps), Full-Speed (12 Mbps), and Low-Speed (1.5 Mbps) downstream traffic, and includes SPI/SMBus configuration interfaces for OEM-flexible firmware customization. A SmartHub is a USB hub controller IC with integrated bridge logic and configurable firmware that adds value features beyond the basic USB hub function defined by the USB-IF. As a category, SmartHub belongs to the USB Interface IC family (a subset of Interface ICs > Integrated Circuits), sitting between root hosts and downstream USB peripherals and providing functions such as port-power switching, per-port enable, programmable GPIO, and flexible upstream port mapping. The USB5742 specifically implements Microchip's fifth-generation USB 2.0 hub feature controller operating in parallel with a SuperSpeed transaction translator, decoupling 5 Gbps SuperSpeed signalling from legacy 480 Mbps traffic and removing the legacy FS/LS signalling bottleneck of older USB-IF transaction translator rules. Key features include full USB Battery Charging v1.2 support including CDP/DCP modes, integrated 5 V VBUS switch drivers with per-port overcurrent protection, USB Link Power Management (LPM) Addendum compliance for U1/U2/U3 low-power states, role-swapping for reversible Type-C wiring, and Microchip's proprietary Multi-Transaction Translator (Multi-TT) for full 480 Mbps bandwidth on all downstream ports simultaneously. The device operates from a single 3.3 V supply, integrates a 5 V to 3.3 V regulator for internal logic, and the -40C to +85C industrial temperature grade supports embedded OEM use. Typical applications include two-port docking stations, embedded USB expansion for industrial PCs, automotive rear-seat USB chargers, USB Type-A wall chargers with smart-charging, and head-unit infotainment connectivity modules. The SPI host interface allows an external MCU to enumerate attached devices, customize charging profiles, and read port events. When designing with the USB5742/2G, ensure the 56-VQFN exposed pad is properly soldered to a contiguous ground plane of at least 1 square inch to meet the 90 mA unconfigured VBUS-current budget. Bypass the 3.3 V rail with 10 uF + 100 nF ceramic capacitors placed within 5 mm of the supply pin, and follow USB-IF HS/SS routing rules (90-ohm differential impedance, intra-pair skew under 15 ps). This page synthesizes distributor pricing, drop-in equivalent SmartHub alternatives, and practical layout guidance not found in the standalone manufacturer datasheet.
USB5807C-I/KD - 7-Port USB 3.2 Gen 1 SmartHub IC | Microchip
The Microchip USB5807C-I/KD is a 7-port, SuperSpeed USB 3.2 Gen 1 SmartHub IC delivering 5 Gbps downstream bandwidth, housed in a 100-pin VQFN EP (12x12 mm) package with industrial temperature grade (-40C to +85C). It supports USB Type-C with integrated USB-C MUX logic, I2C and SPI management interfaces, and Microchip's MultiTRAK, ProTouch, and PortSwap signal-integrity features. A SmartHub is a USB hub that integrates system-level functions typically performed by a separate MCU or processor. In a typical USB topology, a hub sits between the host (root port) and downstream devices, repeating the differential data and managing power and protocol states. The SmartHub class adds vendor configuration, role-swap (USB-C DRP), GPIOs, and optional firmware-driven behaviors that offload the system processor, which is critical in space-constrained embedded designs. The USB5807C family sits in Microchip's hub-controller hierarchy above the USB251x 2.0-only hubs and below larger 10-port parts like the USB5744. Key features include full USB 3.2 Gen 1 (formerly 3.1 Gen 1 / USB 3.0) 5 Gbps SuperSpeed plus USB 2.0 High-Speed/Full-Speed/Low-Speed backward compatibility on all 7 enabled downstream ports, integrated FlexConnect role-swap, per-port battery charging support (BC1.2), and unique 1.2V/3.3V dual-rail operation that simplifies internal rail generation. Per-port USB-C MUX integration eliminates external crossbar switches, reducing BOM cost and PCB area in USB-C docking designs. Architecturally, the device combines a SuperSpeed USB 3.2 Gen 1 physical layer (PHY), a USB 2.0 PHY, an embedded microcontroller for hub repeater logic, configuration ROM/OTP, and an I2C/SPI slave for host MCU management. The 100-VQFN exposed-pad package provides thermal dissipation suitable for industrial ambient operation without external heatsinking. Typical applications include USB-C docking stations, automotive head-unit USB hubs, thin-client monitors with embedded USB, USB-C monitors, embedded industrial PCs, and any USB-C multiport expansion where role-swap and charging are required. The 12x12 mm VQFN with 0.4 mm pitch is footprint-compatible with the USB5744 family for tier-up/down design reuse. When designing with this device, allocate a 4-layer PCB stack-up to maintain 90 ohm differential impedance for SuperSpeed lanes. Decouple both the 1.2V core and 3.3V I/O rails with 100 nF plus 4.7 uF ceramic capacitors placed within 2 mm of the supply pins. The exposed pad MUST be soldered to a continuous ground plane via a 5x5 thermal via array. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical PCB layout notes that are not consolidated in the manufacturer datasheet alone, giving engineers a single reference for design-in decisions.
USB5807CT/KD - 7-Port USB 3.2 Gen 1 SmartHub, VQFN-100 | Microchip
The Microchip USB5807CT/KD is a 7-port, SuperSpeed (SS) USB 3.2 Gen 1 SmartHub controller IC delivered in a 100-pin VQFN (12 mm x 12 mm) package with exposed thermal pad. It is USB-IF compliant under TID1595 against the USB 3.2 Gen 1 specification, supports 5 Gbps Super-Speed plus 480 Mbps Hi-Speed, 12 Mbps Full-Speed, and 1.5 Mbps Low-Speed USB signaling, and exposes I2C/SPI host management interfaces for OEM configuration. Operating supply range is 1.08 V to 3.3 V with an operating temperature window of 0 C to +70 C for the commercial CT suffix variant. A USB hub controller is a specialized interface IC that aggregates one upstream USB port into multiple downstream ports while handling the protocol stack, port power management, and traffic scheduling. SmartHubs add OEM-configurable firmware layers (MultiTRAK, flexPORT, PortSplit) on top of the standard hub state machine, enabling per-port behavior tuning, custom charging profiles, and signal-integrity adjustments without external logic. Within the broader IC hierarchy, USB5807CT/KD belongs to Interface ICs > USB Hubs > USB 3.x Hub Controllers > Power-Managed SmartHub family. Key features include 7 downstream ports configurable as USB 3.2 Gen 1 or USB 2.0, native USB Type-C support via integrated MUX logic, MultiTRAK and PortSplit technology for per-port tuning, I2C and SPI host management interfaces, and Broadcom/Microchip-proprietary low-power states with optimized thermal dissipation. The VQFN-100 package provides a compact 12 mm x 12 mm footprint suitable for embedded designs and dock/monitor applications where board area is constrained. The device uses a low-power architecture with embedded USB 3.x PHYs and a configurable hub feature ROM accessed via SPI. PortSplit allows simultaneous USB 3.x and USB 2.0 operation on the same downstream port, enabling embedded USB 3.x peripherals alongside legacy USB 2.0 devices without external muxes. Driver compatibility covers Microsoft Windows 10/8/7/XP, Apple OS X 10.4+, and mainstream Linux hub drivers, removing the need for custom host stacks. Typical applications include USB-C docking stations, multi-port USB hubs, monitors with integrated USB expansion, embedded industrial USB fan-out, and Type-C breakout boards. Choose USB5807CT/KD when a 7-port SS hub with OEM-tunable power/charging profiles is required in a thermally-constrained enclosure. When designing with this part, ensure adequate copper area under the exposed pad and route SuperSpeed pairs with 90 ohm differential impedance. The host MCU must configure PortSplit, flexPORT, and charging parameters via I2C/SPI before downstream ports enumerate at full capability. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that complement (but do not replace) the manufacturer datasheet DS00002237D and Microchip configuration tools.
USB7056-I/KDX - 6-Port USB 3.2 Gen1 PD SmartHub | Microchip
The Microchip USB7056-I/KDX is a low-power, OEM-configurable 6-port USB 3.2 Gen 1 PD SmartHub controller in a 100-pin VQFN (12x12 mm) package with industrial temperature rating. It integrates a SuperSpeed USB 3.2 Gen 1 hub with native USB Type-C support, a legacy USB 2.0 hub for HS/FS/LS operation, and an on-board USB Power Delivery (PD) controller, providing 6 downstream ports with one Type-C upstream and five Type-A downstream configuration in the KDX pinout. A USB hub controller (USB 3.0/3.2 Gen 1 hub) is a semiconductor device that expands a single upstream USB port into multiple downstream ports, while managing enumeration, power, and protocol translation. The USB hub sits within the broader USB connectivity IC hierarchy: USB hub controller -> USB interface IC -> connectivity semiconductor -> IC. SmartHub variants add on-board PD negotiation and Type-C cable-orientation logic, eliminating the need for an external PD controller in Type-C sink/source designs. Key features include USB 3.2 Gen 1 (5 Gbps) SuperSpeed with native Type-C support, integrated USB PD 3.0 controller, broad host interfaces (GPIO, I2C, I2S, SPI, UART) for peripheral control, flexible GPIOs for status and indicators, integrated 5V LDO regulators for downstream VBUS, and support for battery charging (BC1.2) on each downstream port. The KDX suffix denotes the specific 100-VQFN lane mapping optimized for Type-C + 5x Type-A embedded designs. Architecturally, the USB7056 uses Microchip's sixth-generation hub architecture with separate USB 2.0 and USB 3.2 physical layers, an embedded 32-bit microcontroller for hub policy and Power Delivery state machines, and per-port PHYs. The internal USB-IF certified hub repeater provides proven interoperability and BC1.2 CDP/SDP/DCP charging modes are configurable per port. Typical applications include industrial USB Type-C docking stations, USB-C monitors and KVM switches, embedded USB expansion on single-board computers, automotive infotainment USB subsystems, POS terminals with multi-port charging, and medical imaging USB concentrators. Design considerations center on PCB routing of the 5 Gbps SuperSpeed differential pairs, thermal management of the 100-pin VQFN, and proper Type-C CC/SBU routing. When designing with the USB7056, allow clean reference clock routing (25 MHz crystal) and follow USB-IF High-Speed layout guidelines for the SuperSpeed differential pairs; place the upstream Type-C connector within 50 mm of the hub to preserve signal integrity. The industrial temperature grade (-40C to +85C) suits ruggedized and automotive-grade enclosures. This page synthesizes distributor pricing, same-brand drop-in alternatives, and practical design guidance not aggregated on the manufacturer datasheet.
USB7206C-I/KDX - 6-Port USB 3.2 Gen 2 SmartHub Controller | Microchip
The Microchip USB7206C-I/KDX is a low-power, OEM-configurable USB 3.2 Gen 2 hub controller with 6 downstream ports (5x USB 3.1 + 1x USB 2.0), housed in a 100-pin VQFN (12x12 mm) industrial-temperature package. It is fully compliant with the Universal Serial Bus Revision 3.2 Specification and the USB 2.0 Link Power Management Addendum, with an integrated USB 2.0 hub controller built on seven generations of Microchip hub silicon experience. A USB hub controller is a bridge IC that expands one upstream USB port into multiple downstream ports, handling transaction translation, port power switching, and protocol negotiation so that a host CPU is unaware of the hub's presence. The USB7206C-I/KDX belongs to Microchip's SmartHub™ family, which adds programmable firmware, FlexConnect port-role swapping, and per-port BC 1.2 charging support beyond the baseline hub silicon. In the broader taxonomy it is a USB interface controller (USB 3.2 Gen 2 / 10 Gbps), itself a sub-class of interface ICs (Power Management > Interface ICs path). Key features include USB 3.2 Gen 2 (10 Gbps) signaling on five ports, USB 2.0 high/full/low-speed on the sixth port, integrated 1.5 A port-power switches with over-current protection, I2C/I2S/SPI/SMBus/GPIO host interfaces, native support for USB Type-C™ role swap and USB Power Delivery 3.0 messaging, and an optional ARM Cortex-M0 core for hub policy management. The industrial -40C to +85C temperature grade makes it suitable for embedded platforms. Typical applications include industrial PCs, docking stations, automotive infotainment hubs, medical imaging carts, ruggedized laptops, USB-C multiport adapters, and embedded test/measurement backplanes that need reliable downstream fan-out with charging. The dedicated USB 2.0 hub and the segmented USB 3.2 PHYs isolate traffic and simplify certification. Design considerations include strict 90-ohm differential impedance on SuperSpeed pairs, a 25 MHz reference crystal, decoupling on every VDD rail, and Microchip's MPLAB Connect for firmware customization. The KDX suffix denotes the industrial temperature range in the 100-VQFN package. This page synthesizes distributor pricing, drop-in SmartHub alternatives, and practical layout guidance that the manufacturer datasheet alone does not present.
USB7206T/KDX - 6-Port USB 3.1 Gen 2 Hub Controller | Microchip
The Microchip USB7206T/KDX is a low-power, OEM-configurable USB 3.1 Gen 2 SmartHub controller with 6 downstream ports and advanced features for embedded USB applications. Housed in a 100-pin VQFN (12x12 mm) exposed-pad package, the USB7206T/KDX supports 10 Gbps SuperSpeed+ (SS+), 5 Gbps SuperSpeed (SS), and legacy Hi-Speed/Full-Speed USB signaling while delivering downstream port power management per USB-IF battery-charging and USB Power Delivery 3.0 specifications. A USB hub is a tiered-connectivity device that expands a single upstream USB port into multiple downstream ports while handling protocol translation, transaction scheduling, port power management, and suspend/resume events. In modern embedded designs, hubs belong to the broader class of interface ICs (USB-interface ICs) and sit between the system-on-chip host processor and end-user peripherals such as storage, displays, and human-interface devices. The USB7206 family implements the latest USB 3.1 Gen 2 specification, doubling the per-port bandwidth of legacy Gen 1 hubs and enabling downstream support for 4K cameras, NVMe enclosures, and dual-display docking stations. Key features of the USB7206T/KDX include a USB 3.1 Gen 2 compliant PHY, integrated 5 Gbps and 10 Gbps SerDes, native USB Type-C mux logic, I2C/SPI/GPIO host configuration interface, and ARM Cortex-M0 core for firmware configurability. Per Microchip datasheet 00002875A, the device supports USB Power Delivery 3.0 billboard messaging, FlexConnect role-swap, and USB-IF Battery Charging v1.2 CDP/SDP/DCP modes on every port. Native 1.09 V core supply and 3.3 V I/O allow direct connection to modern SoC rails. Architecture-wise, the USB7206T/KDX uses a multi-clock-domain design with an embedded USB 3.1 Gen 2 PHY on each downstream port. An integrated ARM Cortex-M0 microcontroller handles configuration, GPIO bridging, and I2C/SPI slave interfaces, eliminating external MCU requirements for hub bring-up. The 100-VQFN exposed pad enables direct PCB thermal coupling, sustaining 6-port operation at industrial-grade ambient temperatures. Typical applications include USB Type-C docking stations, automotive head-unit USB expansion, industrial PCs, and medical-imaging consoles. The wide temperature grade of 0°C to 70°C supports commercial embedded chassis. Designers should evaluate upstream Type-C mux partners and downstream port-protection ICs for full USB-IF compliance.
VNC1L-1A - Vinculum Embedded USB Host/Slave Controller, 48-LQFP | FTDI
The FTDI VNC1L-1A is a single-chip embedded dual USB Host/Slave Controller IC from the Vinculum family, packaged in a 48-pin LQFP (7x7 mm, 0.5 mm pitch). It integrates two USB 2.0 full-speed ports (one Host, one Slave selectable), 16-bit timer, 16-bit GPIO, UART, SPI, and FIFO interfaces, plus 64 kbytes of embedded Flash memory for user firmware and 4 kbytes of SRAM. The device operates from a single 3.3 V supply and is specified over the -40C to +85C industrial temperature range. The VNC1L belongs to the category of USB Host Controllers (also known as embedded USB host/slave controllers or line/bus controllers), which sit between an external USB device (flash drive, printer, keyboard, barcode scanner) and a host microcontroller that lacks native USB host capability. Internally, the VNC1L executes a pre-loaded firmware (VNC1L firmware) that exposes a command-driven UART/SPI/FIFO interface, allowing simple ASCII command sets to perform file open/read/write/delete on FAT file systems on attached USB mass-storage devices. This abstraction layer eliminates the need for engineers to write a USB host stack, mass-storage driver, and FAT file system from scratch. Key features documented in the FTDI datasheet revision 2.02 (document FT_000030) include dual USB 2.0 full-speed (12 Mbps) ports, integrated 3.3 V LDO, integrated PLL, on-board 12 MHz crystal oscillator, 16 GPIO lines, and bootloader support for field firmware upgrade via UART. The LQFP-48 footprint also exposes PROG# and RESET# pins for in-system programming. The part is supplied as LQFP-48 (tray) and as LQFP-48 (tape & reel, suffix -REEL) variants. Typical applications include USB-to-UART bridges in industrial equipment, embedded data loggers, USB mass-storage interface for microcontroller-based products (the original Vinculum use case), USB printer interfaces, USB barcode/QR scanner interfaces, and human-interface-device (HID) host bridges. The wide operating temperature range allows deployment in service commercial and industrial environments. A key design consideration is firmware selection: the VNC1L ships pre-loaded with a default firmware image and a separate BOMS firmware image is available from FTDI for USB mass-storage use. Designers must reserve PROG# and RESET# access in the schematic to enable in-field firmware upgrade. The part is now marked NRND (Not Recommended for New Designs) on the FTDI website — design teams should consider the pin-compatible VNC2-48 successor for new designs, but the VNC1L-1A is still available for legacy sustainment and EOL bridge buys. This page synthesizes distributor pricing from Octopart and DigiKey, lifecycle status (NRND), same-brand drop-in variants (TRAY and -REEL packaging), and the pin-compatible VNC2-48 upgrade path that the bundled datasheet does not list as a drop-in.
VSC410XKM - Baseboard/Enclosure Management Controller | Analog Devices
The Analog Devices / Maxim Integrated VSC410XKM is a Baseboard and Enclosure Management Controller (BMC/EMC) IC interface management device, supplied in a surface-mount package on Tube packaging. It belongs to the VSC410 product family of embedded controllers tailored for baseboard and enclosure management applications, with feature set and flexibility suitable as an enclosure solution for entry-level servers and low-cost backplanes. What is a Baseboard Management Controller? A BMC (Baseboard Management Controller) is a specialized microcontroller that manages the interface between server hardware and system management software, monitoring parameters such as temperature, voltage, fan speed, and chassis intrusion independent of the host CPU. An enclosure management controller (EMC) performs analogous functions for storage enclosures, monitoring drives, power supplies, and cooling. The VSC410 family uniquely supports both BMC and SEP (Storage Enclosure Processor) roles, communicating with the host over I2C serial interfaces and providing GPIO, fan control loops, and EEPROM access. Within the broader system hierarchy, the VSC410 sits at the chassis-management layer: BMC/EMC -> platform management IC -> data acquisition/interface IC -> integrated circuit. Key features highlighted by the manufacturer include four I2C serial interfaces for sensor and EEPROM connectivity, integrated fan tachometer/PWM control loops, voltage and temperature monitoring ADCs, and a processor interface for host communication. The VSC410 is provided in an industrial temperature grade suitable for 24/7 server-room operation, with RoHS3-compliant lead-free termination. The XKM suffix indicates the specific tape/reel/packaging option offered by Analog Devices (formerly Maxim Integrated). Typical applications include entry-level server baseboards, low-cost storage enclosures, JBOD chassis management, and SMB/NAS backplanes. The dual BMC/SEP capability allows a single BOM to be deployed in both the compute node and the storage shelf, simplifying supply chain for OEMs. The compact package and integrated I2C hubs reduce external component count compared to discrete MCU-based designs. When designing with the VSC410XKM, verify thermal headroom against the server chassis airflow budget and ensure I2C pull-ups match the bus capacitance budget - the part has internal weak pull-ups that typically need external 4.7 kohm resistors at 3.3 V. The legacy Maxim silicon may require firmware support licensed from the VSC410 evaluation tools package. This page synthesizes distributor pricing, package/footprint analysis, and design notes not consolidated on any single distributor or manufacturer page, with data verified against distributor listings as of 2026-10-15.
VSC452XHW-05 - Interface Controller ADC, BGA | Analog Devices
The Analog Devices (formerly Maxim Integrated / Vitesse Semiconductor) VSC452XHW-05 is a single-channel Serial/Deserializer (SERDES) Framer / Interface Controller IC housed in an HW-prefixed BGA surface-mount package. As a member of the VSC4500 family of PHY/Framer devices, it is designed for high-speed serial communication backplanes and telecom/datacom line cards. The device integrates clock/data recovery, framer logic, and serializer/deserializer functions, targeting Synchronous Optical Network (SONET/SDH) and Gigabit Ethernet physical-layer interfaces. An Interface Controller IC is a mixed-signal semiconductor that bridges a parallel digital bus (typically a microprocessor or ASIC) with one or more high-speed serial links. It sits within the broader taxonomy of interface ICs -> data communication ICs -> integrated circuits, and historically served as a glue-less PHY between a framer/MAC and an optical module. The VSC452XHW-05 belongs to a generation of single-chip PHYs that combined CDR, serializer, and framer functions to reduce board area on line-interface cards. Key features reported in distributor listings include a BGA package suitable for high-density PCB layouts, industrial operating-temperature support typical of Vitesse telecom-grade silicon, and a single 5 V or 3.3 V supply domain. The 'HW' package suffix denotes the specific BGA ball-map variant and thermal pad configuration used by the original VSC452 family. Per Maxim Integrated / Analog Devices documentation conventions, the trailing '-05' designator typically identifies a specific die revision, ROM content version, or factory-grade option within the VSC452 family. Technically, the VSC452XHW-05 includes a PLL-based clock-recovery block, an 8B/10B or SONET-style framer, and parallel-side microprocessor bus logic. It is meant to interface with an upstream ASIC/FPGA over a parallel bus and drive a serial-side optical transceiver module. Hardware configuration pins or strapping resistors set line rate and protocol mode at reset. Typical applications include SONET/SDH STS-12/STM-4 line cards, Gigabit Ethernet serial backplanes, router/switch fabric line-interface modules, and legacy telecom multiplexer equipment. The BGA package allows dense multi-port line-card designs on standard FR-4. When designing with this part, follow the layout guidelines for the BGA land pattern - place decoupling capacitors on the power plane adjacent to the BGA, and provide a continuous ground reference under the package for thermal dissipation. Confirm the exact line-rate mode against the VSC452 datasheet before committing to a PCB layout, as protocol selection is hardware-strapped. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
VSC7155VU-02 - 8-Bit I/O Expander IC Interface Controller | Analog Devices
The Analog Devices VSC7155VU-02 is an I/O expander interface controller IC designed to extend the number of general-purpose input/output lines available to a host microcontroller or processor. Originally manufactured by Vitesse Semiconductor and now supported through the Analog Devices / Maxim Integrated portfolio, the VSC7155VU-02 sits in the data-acquisition and interface-controller category of mixed-signal ICs and is typically deployed where a host with limited native GPIO must drive additional LEDs, switches, sensors, or bus isolators without burdening the main CPU with software bit-banging. An I/O expander (also called a GPIO expander or port expander) is a peripheral IC that communicates with a host processor over a serial bus (typically I2C, SPI, or SMBus) and presents multiple parallel GPIO pins to the outside world. Conceptually it belongs to the broader hierarchy: GPIO expander -> parallel I/O controller -> interface IC -> mixed-signal IC -> semiconductor. Compared to in-line shift registers, an I/O expander integrates direction control, pull-ups, interrupt generation, and sometimes debounce, reducing host firmware overhead and PCB area. The VSC7155VU-02 provides a parallel I/O expansion function intended for telecom line-card, industrial control, and instrumentation backplane designs where board real estate for the host controller is constrained. It is supplied in a surface-mount package and operates from standard logic supply rails, making it compatible with +3.3 V and +5 V digital sections. Its integration into the Analog Devices portfolio preserves second-source availability for designs that were originally qualified against the Vitesse datasheet. Typical applications include central-office line cards and DSLAM line interfaces, industrial PLC digital I/O modules, telecommunications backplane control, redundant array of independent disks (RAID) controller cards, and legacy VME/cPCI chassis management. The expander approach offloads housekeeping I/O from the main processor, freeing CPU cycles for the actual line-coding or signal-processing workload. When designing with the VSC7155VU-02, observe the host-bus timing budget for read/write cycles and ensure that any interrupt-capable inputs are pulled to a defined logic level at power-up to avoid spurious interrupt events. Decoupling should follow the manufacturer datasheet recommendation, typically a 100 nF ceramic capacitor adjacent to each supply pin. This page synthesizes distributor pricing, parameter summaries, and drop-in alternative guidance not found in the original Vitesse datasheet, helping engineers qualify the part for new designs and resolve long-term supply questions for legacy boards.
VSC7157YS-03 - 36-PHY 1.5/3 Gbps SAS Edge/Fanout Expander IC | ADI/Maxim
The Analog Devices Inc. (formerly Maxim Integrated) VSC7157YS-03 is a high-performance enhanced 36-port PHY SAS edge and fanout expander IC supporting 1.5 Gbps and 3.0 Gbps serial-attached SCSI (SAS) data rates. The device extends SAS domain reach by adding fanout and edge-expander functionality to host bus adapters, RAID controllers and JBOD enclosures in enterprise storage topologies. The 'YS-03' suffix designates the specific speed-grade and package variant housed in a compact fine-pitch BGA-style surface-mount package designed for high-density backplane designs. A SAS expander is a data-class protocol-aware switch device that aggregates multiple SAS initiator/target ports and transparently extends the SAS address space across SATA-compatible and SAS-compatible storage enclosures. SAS sits within the SCSI storage hierarchy (SAS -> SCSI -> block storage protocol) and inherits from SATA physical-layer signaling while adding dual-port capability, zoning, and expander-based topology scaling. Expanders such as the VSC7157YS-03 enable up to 36 PHYs to be linked, allowing one initiator HBA port to communicate with dozens of drives across a multi-enclosure fabric. Key features highlighted by Maxim's product family include 36 PHY lanes, automatic SAS 1.5/3.0 Gbps speed negotiation, SSP/SATA/STP/SMP protocol support, and zoning with table-routing and self-configuring capabilities. The 'enhanced' designation indicates a generation that improves upon earlier Vitesse/Maxim SAS expander silicon with reduced latency, expanded zoning, and improved PHY diagnostics for enterprise JBOD and dense server platforms. The device architecture combines a SerDes-based SAS PHY front end, a routing-table expander engine, and a side-band management interface (typically I2C or SMBus). It supports wide-port aggregation (e.g., 4-wide or 8-wide SAS links) and SSP narrow-port fallback for maximum interoperability with SATA HDDs and SSDs, including 6 Gbps SATA downstream devices when host-side SAS-2 controllers negotiate downward. Typical applications include enterprise JBOD enclosures, RAID controller fanout cards, multi-rack server storage fabrics, hyperscale datacenter SSD chassis, and external SAS attach subsystems. Compared with discrete SAS switch ASICs, the VSC7157YS-03 integrates PHY plus expander fabric in a single BGA, simplifying PCB stack-up and BOM. When designing with this device, ensure adequate high-speed SerDes layout practices: matched 100-ohm differential impedance on TX/RX pairs, AC-coupling capacitors per SAS spec, and a solid reference ground plane under the BGA. Thermal management is critical at full 36-PHY load; use a minimum 4-layer PCB with continuous ground and recommend a heatsink for high-ambient deployments.
VSC7158XHT-03 - 18-PHY 1.5/3.0 Gbps SAS Edge/Fanout Expander | Microchip (Maxim Integrated)
The Microchip (formerly Maxim Integrated) VSC7158XHT-03 is an Enhanced 18-PHY 1.5 Gbps and 3.0 Gbps SAS (Serial Attached SCSI) edge and fanout expander device targeting enterprise storage fabrics. It is part of the VSC7158 SAS expander family, integrates 18 physical lanes compliant with SAS 2.0, and supports both 1.5 Gbps (G1) and 3.0 Gbps (G2) serial rates for direct and switched storage topologies. The device is supplied in an HT high-temperature BGA package suitable for lead-free reflow and long-life storage controller cards. What is a SAS expander? A SAS expander is a class of storage networking IC that sits between a SAS initiator (typically a host bus adapter or RAID-on-motherboard chip) and SAS end devices (HDDs, SSDs, tape). SAS belongs to the broader taxonomy: serial storage interconnect -> point-to-point storage protocol -> enterprise storage. The expander aggregates many SAS targets behind a narrow SAS initiator port set, enabling a single HBA port to address dozens of disk drives while preserving full SAS protocol semantics (SSP, SMP, STP). Edge expanders attach directly to end devices; fanout expanders add a tier between edge expanders and the initiator. Key features of the VSC7158XHT-03 include 18 PHY ports operating at 1.5/3.0 Gbps, support for SAS 2.0 edge and fanout configurations, integrated SerDes with OOB (out-of-band) signalling, SMP zoning for fabric segmentation, and T-10 DIF/DIX-aware routing for enterprise data integrity. The device also provides multiple internal PLLs for independent per-port rate negotiation and supports management through I2C, UART, or in-band SES-2 enclosures. Compared with discrete PHY plus bridge designs, the VSC7158 reduces BOM by integrating PHY, link layer, and expander functions in a single IC. Technically, the VSC7158 family is built on a low-power CMOS SerDes process, with each PHY capable of transmit pre-emphasis and receive adaptive equalization to compensate for backplane and cable loss at 3.0 Gbps. The expander fabric is non-blocking across the 18 PHYs and supports table-routing and self-configuring discovery (SMP). Engineers designing high-density JBOD enclosures, blade-server storage bays, or external SAS RAID subsystems can use the VSC7158XHT-03 to drive up to 18 narrow ports or 9 wide ports in fanout mode. Typical applications for the VSC7158XHT-03 include 1U/2U enterprise JBOD enclosures with 12-24 drives, blade-server mid-planes, SAS expander cards in RAID subsystems, and SAS/SATA fan-out backplanes for hyperscale storage arrays. It also appears in legacy tape-library back-end fabrics. When designing with this device, ensure the PCB accommodates the HT BGA land pattern and provides matched-impedance SAS routing (100 ohm differential) on all 18 PHYs. Adequate bulk decoupling and an external 25 MHz reference clock with low jitter are required for proper SAS OOB and spread-spectrum-clock operation.
VSC7170XYQ-01 - 2:1 SATA Failover Switch, 3 Gbps | Analog Devices
The Analog Devices (formerly Maxim Integrated / Vitesse Semiconductor) VSC7170XYQ-01 is a Serial ATA (SATA) port multiplexer and signal buffer implementing a 2:1 failover switch function for SATA Gen1 (1.5 Gbps) and SATA Gen2 (3.0 Gbps) links. Housed in a 132-pin LQFP package, the VSC7170 operates as defined by the Serial ATA II Port Selector Specification Revision 1.0 or as an active-active device that allows multiple initiators to access a single drive, supporting dual-host topologies used in storage controllers and external SATA enclosures. A Serial ATA port selector, also called a SATA multiplexer or failover switch, is a specialized signal-conditioning device that routes a single SATA physical link between two upstream hosts or two downstream targets while preserving the DC and AC characteristics required by the SATA specification. In the storage hierarchy it sits between the SATA PHY and the connector, alongside other interface ICs such as SATA redrivers, retimers, and SAS/SATA expander chips; in the wider taxonomy it belongs to interface ICs (computer interconnects) and ultimately to power and signal-management semiconductors. Key features include support for SATA 1.5 Gbps and SATA II 3.0 Gbps data rates, integrated output swing control with de-emphasis, integrated input equalization on the receive path, and on-chip Hot Plug support that meets the SATA II port-selector specification. The part operates from a single 1.2 V core supply plus a 3.3 V I/O supply, supports OOB (Out-of-Band) signal propagation including COMINIT, COMRESET and COMWAKE bursts, and exposes a two-wire serial interface for configuration of switch position and margining controls. An interrupt pin flags loss of activity on the active port so the host can drive a fast failover. Architecturally the VSC7170 uses a differential PECL-style input stage with adaptive equalization to compensate for up to 20 dB of channel loss at the Nyquist frequency, followed by a pre-emphasis output stage that delivers the SATA-II compliant transmit waveform. Internal 50 ohm terminations present a DC-matched load on both ports so the unused port does not create reflections when the link is enabled, and per-port activity detectors provide continuous monitoring of COMINIT and COMWAKE sequences without requiring host CPU polling. Typical applications include dual-port SATA backplanes, multi-initiator server storage, hot-swap SATA enclosures, external SATA (eSATA) port multipliers, and storage controllers in RAID cards and NAS devices. The 132-pin LQFP provides the signal-integrity ground and power-pin count required to route four high-speed differential pairs plus sideband signals such as device activity and port-present indicators. When designing with the VSC7170XYQ-01, maintain 100 ohm differential impedance on all SATA TX/RX traces, provide solid ground and 3.3 V/1.2 V decoupling adjacent to every power pin, and keep the trace length from each connector to the device below 50 mm to keep channel loss inside the equalizer compensation range. Drive the I2C configuration port with a 3.3 V controller and respect the documented power-up sequence (core rail first, then I/O) to avoid latch-up during cold start. This page synthesizes distributor pricing, same-family alternatives, and practical design notes not found in the manufacturer datasheet.