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CP2102N-A02-GQFN28 USB-to-UART Bridge, QFN28 | Silicon Labs
The Silicon Labs CP2102N-A02-GQFN28 is a single-chip USB-to-UART bridge controller in the USBXpress family, housed in a 28-pin QFN (5x5 mm) package. It integrates a USB 2.0 full-speed function controller, USB transceiver, internal 48 MHz oscillator, voltage regulator (3.3 V output), one-time-programmable ROM for vendor/product descriptors, and a UART engine, while requiring no external USB resistors or crystal. The CP2102N-A02 revision supplies 3 V to 3.6 V on VDD and supports programmable baud rates up to 3 Mbaud with hardware flow control. A USB-to-UART bridge is a class of interface IC that converts USB signaling on the host side to asynchronous serial (UART) signaling on the device side, eliminating the need for firmware-side USB stack development. Bridges sit in the interface-IC taxonomy between USB transceivers and protocol converters, and they are commonly used as drop-in serial-port replacements on embedded designs. Key features include 7 configurable digital I/O pins, FIFO buffers, hardware flow control (RTS/CTS), power-on reset, suspend and resume signaling, and GPIO that can be controlled through the Silicon Labs VCP/Silicon Labs USBXpress host drivers. The integrated 3.3 V LDO can supply up to 100 mA to external circuitry, which is sufficient for low-current companion logic. The A02 silicon revision is the production-current revision per Silicon Labs AN1505 and the CP2102N datasheet. Architecturally, the device combines an on-chip USB 2.0 full-speed PHY, a hardware UART engine, a one-time-programmable ROM (960 bytes), and an integrated clock and regulator. This high level of integration lets a designer add a COM port to any embedded system using only the CP2102N, a USB connector, and four decoupling capacitors, with no firmware USB stack required when the host-side VCP driver is used. Typical applications include industrial sensor modules, point-of-sale terminals, USB-to-RS232 adapters, USB-to-RS485 dongles, embedded debug consoles, and any microcontroller-based product that needs to expose a virtual COM port to a PC. Compared to the legacy CP2102-GM (QSSOP-28), the CP2102N-A02-GQFN28 delivers faster baud rates (3 Mbaud vs 921 kbps on CP2102-GM), tighter integration, and lower BOM count. Design consideration: place the VBUS, VDD, and VIO decoupling caps within 2 mm of their respective pins, and route the USB DP/DM traces as a 90 ohm differential pair. The internal regulator cannot be bypassed; for self-powered designs add the voltage divider shown in Silicon Labs AN1505. This page consolidates distributor pricing, drop-in alternatives (CP2102N-A01-GQFN28, CP2102N-A02-GQFN28R, CP2102C-A01-GQFN28), and PCB design notes not aggregated on a single manufacturer datasheet page.
CP2102N-A02-GQFN28R USB-to-UART Bridge, QFN28 | Silicon Labs (Tape & Reel)
The Silicon Labs CP2102N-A02-GQFN28R is a single-chip USB-to-UART bridge controller in the USBXpress family, housed in a 28-pin QFN (5x5 mm) package. It integrates a USB 2.0 full-speed function controller, USB transceiver, internal 48 MHz oscillator, voltage regulator (3.3 V output), one-time-programmable ROM for vendor/product descriptors, and a UART engine, while requiring no external USB resistors or crystal. The CP2102N-A02 revision supplies 3 V to 3.6 V on VDD and supports programmable baud rates up to 3 Mbaud with hardware flow control. A USB-to-UART bridge is a class of interface IC that converts USB signaling on the host side to asynchronous serial (UART) signaling on the device side, eliminating the need for firmware-side USB stack development. Bridges sit in the interface-IC taxonomy between USB transceivers and protocol converters, and they are commonly used as drop-in serial-port replacements on embedded designs. Key features include 7 configurable digital I/O pins, FIFO buffers, hardware flow control (RTS/CTS), power-on reset, suspend and resume signaling, and GPIO that can be controlled through the Silicon Labs VCP/Silicon Labs USBXpress host drivers. The integrated 3.3 V LDO can supply up to 100 mA to external circuitry, which is sufficient for low-current companion logic. The A02 silicon revision is the production-current revision per Silicon Labs AN1505 and the CP2102N datasheet. Architecturally, the device combines an on-chip USB 2.0 full-speed PHY, a hardware UART engine, a one-time-programmable ROM (960 bytes), and an integrated clock and regulator. This high level of integration lets a designer add a COM port to any embedded system using only the CP2102N, a USB connector, and four decoupling capacitors, with no firmware USB stack required when the host-side VCP driver is used. Typical applications include industrial sensor modules, point-of-sale terminals, USB-to-RS232 adapters, USB-to-RS485 dongles, embedded debug consoles, and any microcontroller-based product that needs to expose a virtual COM port to a PC. Compared to the legacy CP2102-GM (QSSOP-28), the CP2102N-A02-GQFN28R delivers faster baud rates (3 Mbaud vs 921 kbps on CP2102-GM), tighter integration, and lower BOM count. Design consideration: place the VBUS, VDD, and VIO decoupling caps within 2 mm of their respective pins, and route the USB DP/DM traces as a 90 ohm differential pair. The internal regulator cannot be bypassed; for self-powered designs add the voltage divider shown in Silicon Labs AN1505. This page consolidates distributor pricing, drop-in alternatives (CP2102N-A01-GQFN28, CP2102N-A02-GQFN28RR, CP2102C-A01-GQFN28), and PCB design notes not aggregated on a single manufacturer datasheet page.
CP2103-GM USB 2.0 to UART Bridge | Silicon Labs
The Silicon Labs CP2103-GM is an integrated USB 2.0-to-UART bridge controller with a 28-QFN 5 mm × 5 mm package and a stated operating voltage of 1.8 V to 3.6 V. It provides a compact interface for connecting legacy RS-232 or RS-485 equipment to a USB host while minimizing external components and PCB space. The device combines USB transceiver, UART bridge, clock, and programmable USB interface functions on one chip. According to the available manufacturer-linked documentation and distributor records, it supports USB-to-UART data transfer and is designed for upgrading existing serial-port designs to USB. A USB-to-UART bridge controller is a class of USB interface controller that translates USB host transactions into a conventional UART serial stream. In the product hierarchy, CP2103-GM belongs to the USB interface-controller and USB-to-UART bridge category, which sits within broader interface semiconductors and embedded connectivity solutions. Its value is especially relevant when a modern computer has no native RS-232 port but an instrument, industrial controller, service tool, or data-acquisition product still exposes a serial interface. Available verified data identifies the CP2103-GM as a 28-QFN USB bridge with USB 2.0 and UART interfaces. Search results also describe an integrated USB transceiver, integrated clock, and an integrated 1024-byte EEPROM for identifiers and device information. These features can reduce the number of discrete USB-interface components required in a design. The integrated clock is especially useful because it eliminates the need for an external crystal in applications that do not require a different clocking arrangement. The device is suitable for RS-232 and RS-485 modernization, USB-to-serial adapters, test equipment, programming interfaces, and embedded data links. RS-232 designs generally need appropriate line-level voltage handling, while RS-485 designs require a compatible transceiver and termination strategy; CP2103-GM alone is not a complete external RS-232 or RS-485 physical-layer solution. The host-side USB connection, UART signal integrity, voltage levels, grounding, and firmware support should therefore be validated together. Designers should verify the exact pinout, electrical limits, clocking configuration, USB enumeration behavior, and supported operating voltage from the manufacturer datasheet before layout or firmware release. A compact QFN footprint helps reduce board area, but exposed-pad thermal management and careful USB differential-pair routing remain important. Firmware should also handle the device identifier and serial-number configuration appropriate to the intended production process. This page combines verified distributor metadata, manufacturer-linked documentation references, and engineering guidance focused on USB-to-UART integration. It does not invent missing electrical limits, package dimensions, or alternative-device specifications; unavailable values are marked in the specification section for follow-up against the manufacturer datasheet.
CP2103-GMR USB 2.0 to UART Bridge | Silicon Labs
The Silicon Labs CP2103-GMR is a USB 2.0-to-UART bridge controller with four digital I/O pins, an integrated 1024-byte EEPROM, and royalty-free drivers in a 28-pin QFN package measuring 5 x 5 mm. It converts between a USB host connection and an asynchronous serial data bus while supporting 3 V to 3.6 V operation. The CP2103-GMR is designed for compact embedded systems that need USB connectivity without implementing a USB protocol stack in the host or target controller. A USB-to-UART bridge is an interface IC that integrates USB device control, USB transceiver functions, and an asynchronous UART interface into one component. The USB side connects the equipment to a computer or other USB host, while the UART side provides a conventional serial channel for embedded firmware, bootloaders, configuration tools, and diagnostic interfaces. This places the CP2103-GMR within the broader USB interface controller and semiconductor hierarchy. The verified manufacturer information identifies USB 2.0 compliance, four digital I/O pins, an integrated 1024-byte EEPROM, royalty-free drivers, and no external crystal requirement. The EEPROM can store device-related configuration such as vendor ID, product ID, serial number, power descriptor, release number, and product description. The UART interface supports asynchronous serial data communication, while the internal clock removes the need for an external crystal in the target design. The 5 x 5 mm QFN28 exposed-pad package is intended for surface-mount PCB designs and helps reduce board area compared with a discrete USB-to-serial implementation. The exposed pad provides the package thermal connection, but exact thermal resistance and recommended land-pattern dimensions are not included in the supplied verified data and must be taken from the manufacturer datasheet before layout release. Typical CP2103-GMR applications include USB-to-UART debug adapters, industrial serial gateways, USB-connected embedded controllers, configuration and programming interfaces, instrument control links, and compact USB-to-RS-232 bridges when the external line-driver circuitry is appropriate. The part is especially useful where a direct UART signal is preferred over a complex USB peripheral implementation. Designers should confirm the exact UART voltage levels, USB data-routing requirements, exposed-pad layout, driver installation model, and production programming requirements against the manufacturer datasheet. USB differential routing, ESD protection, ground continuity, decoupling, and exposed-pad thermal via placement remain critical to reliable field operation. This page consolidates the verified manufacturer and distributor information for CP2103-GMR, including interface features, package details, design considerations, application guidance, and cross-reference findings. It also separates confirmed facts from parameters that require direct manufacturer documentation before schematic or PCB sign-off.
CP2104-F03-GM - USB to UART Bridge QFN-24 | Silicon Labs
The Silicon Labs CP2104-F03-GM is a single-chip USB 2.0 full-speed to UART bridge controller housed in a 24-pin QFN (4x4 mm) package with exposed pad, featuring a 576-byte receive FIFO and 3.3 V I/O operation. A USB-to-UART bridge is an interface IC that converts between a USB bus and a serial UART (asynchronous serial) port. It sits at the bottom of the USB interface hierarchy - below USB hubs and USB controllers - and is a type of USB bridge controller within the broader Smart Interface family of connectivity ICs. Its role is to let a microcontroller or legacy RS-232/RS-485 design communicate with a modern USB host without redesigning the serial firmware. Key features include an integrated USB 2.0 full-speed (12 Mbps) transceiver, an integrated clock requiring no external crystal, integrated 1024-byte One-Time Programmable (OTP) ROM for customizing USB VID/PID and product strings, an on-chip power-on-reset circuit, and a 576-byte receive buffer. Because everything is integrated, a complete USB-to-serial design needs only the CP2104, two USB bus passives, and decoupling capacitors. Technically, the CP2104 implements the USB protocol stack and UART framing in silicon. Existing RS-232 boards can often be upgraded to USB by simply replacing the RS-232 level translator with the CP2104, since its UART signals (~TXD, ~RXD, ~RTS, ~CTS, ~DTR, ~DSR, ~DCD, ~RI) map directly to legacy handshake lines. Drivers are available through the Silicon Labs USBXpress suite and standard VCP (Virtual COM Port) drivers for Windows, macOS, and Linux. Typical applications include USB-to-serial debug and programming adapters, industrial RS-232/RS-485 to USB conversion, embedded system console ports, and consumer device firmware-update interfaces. Design consideration: note that Silicon Labs community posts indicate this part is Not Recommended for New Designs (NRND); port to the pin-compatible CP2102N using Silicon Labs application note AN976. This page adds distributor pricing, drop-in alternatives, pinout data, and design notes synthesized beyond the raw datasheet.
CP2104-F03-GMR - USB 2.0 to UART Bridge QFN-24 | Silicon Labs
The Silicon Labs CP2104-F03-GMR is a single-chip USB 2.0 to UART bridge controller delivered in a 24-pin QFN (4x4 mm) package with exposed pad. It integrates a USB 2.0 full-speed transceiver, an on-chip clock requiring no external crystal, a 576-byte FIFO buffer, and an on-chip voltage regulator with a 3.45 V output, operating from a 3.0 V to 3.6 V supply (1.8 V I/O capable via VIO). A USB-to-UART bridge is an interface IC that converts USB bus traffic into a standard asynchronous serial (UART) stream, allowing a host computer to communicate with embedded microcontrollers over a virtual COM port. Within the power-management and interface-IC hierarchy, it sits between the physical USB layer and the MCU serial peripheral, eliminating firmware development on the bridge side. Key features include a fully integrated USB transceiver (no external resistors), an integrated clock (no external crystal), a programmable baud rate from 300 bps to 2 Mbps, 1024 bytes of one-time-programmable ROM for custom VID/PID and product strings, and royalty-free virtual COM port drivers for Windows, macOS, and Linux. Four GPIO pins (GPIO.0 to GPIO.3) with hardware flow control (~RTS/~CTS, ~DTR/~DSR, ~DCD/~RI) provide flexible signaling. Architecturally, the CP2104 pairs a USB 2.0 full-speed (12 Mbps) device controller with a UART engine and on-chip power-on-reset circuitry. The integrated 3.45 V regulator can supply external circuitry at modest current, and SUSPEND/~SUSPEND outputs support USB bus power management. Typical applications include USB-to-serial programming and debug adapters, MCU bootloaders for kits such as ESP32 and Arduino-style boards, industrial controllers and data loggers, and embedded computing modules needing a plug-and-play serial link. Design tip: keep the 4.7 uF to 10 uF decoupling on VDD/VBUS close to the pins, connect REGIN to VBUS, and bias ~RST high with 4.7 kohm to avoid spurious enumeration resets. VIO lets the UART side interface with 1.8 V logic without level shifting. This page synthesizes distributor pricing, drop-in alternatives, pinout, and practical design notes not found in the manufacturer datasheet alone. Pricing shown as of 2026-10-20.
CP2105-F01-GM - USB 2.0 Dual-UART Bridge | Silicon Labs
The Silicon Labs CP2105-F01-GM is a single-chip USB 2.0 full-speed to dual-UART bridge controller with USB 2.0, two asynchronous serial interfaces, full modem-control signals, five digital I/O pins, an integrated transceiver, an oscillator, and one-time programmable ROM in a compact 4 x 4 mm QFN-24 package. The verified distributor data identifies the device as a USB Bridge, USB-to-UART interface IC, and full-speed USB-to-UART tube solution. A USB-to-UART bridge is an interface IC that connects a USB host to legacy serial equipment. It converts USB traffic into one or more UART signals, allowing instruments, embedded systems, and service tools to use existing serial protocols without requiring a full USB controller in the host system. The CP2105 dual-UART architecture places two asynchronous serial data buses and modem-control functions on one device, reducing board space while supporting multiple serial links. The main verified features include USB 2.0 full-speed operation, USB transceiver integration, one internal oscillator, one-time programmable ROM, two UART buses, full modem-control signals, and five digital I/O pins. Royalty-free drivers are identified by the manufacturer product-page result, supporting a straightforward USB-to-serial implementation. The package is a 4 x 4 mm QFN-24, also described in the datasheet snippet as MLF or MLP terminology. The device is suited to legacy RS-232 migration, USB-to-dual-serial adapters, embedded debug and service interfaces, industrial equipment connectivity, and USB instrumentation. Compared with discrete USB interface implementations, the integrated transceiver, oscillator, ROM, dual UART channels, and modem controls reduce component count and simplify firmware-facing communication. The exposed-pad QFN-24 package requires careful PCB layout, adequate grounding, and thermal-via placement. USB differential routing should be kept short and impedance-controlled, while UART signals should be separated from noisy switching nodes. The one-time programmable ROM should be considered during product identification and manufacturing planning because programmable identity is not the same as freely rewritable storage. This page combines the verified manufacturer datasheet description, distributor listings, package information, and practical USB-to-UART design context. It does not infer electrical limits that were not supplied in the verified data; consult the official Silicon Labs datasheet before finalizing power, current, clock, and pin-level design details.
CP2105-F01-GMR USB 2.0 Dual UART Bridge | Silicon Labs
The Silicon Labs CP2105-F01-GMR is a single-chip USB 2.0 full-speed interface bridge with two asynchronous UART data buses, full modem-control signals, a USB transceiver, an integrated oscillator, and one-time programmable ROM. It operates from a 1.8 V or 3.3 V supply and is packaged in a compact 4 x 4 mm QFN-24 package. A USB-to-UART bridge is an interface IC that translates USB traffic from a host computer into serial data for UART-based embedded equipment. In the broader semiconductor hierarchy, the CP2105 belongs to interface controllers, USB interface devices, and data-conversion components used to simplify host-to-embedded serial connectivity. Its integrated clock generator, voltage regulator, power-on reset, and USB transceiver reduce the number of external support components required in a USB-to-serial design. The CP2105 provides programmable baud-rate generation, hardware flow-control support, a 296-byte one-time programmable ROM for customizable product information, and an integrated 3.45 V regulator. The two UART channels make it suitable for dual-port debug consoles, configuration tools, industrial controllers, test equipment, and embedded systems that need more than one serial port. The USB side operates at full speed, while the serial side uses asynchronous UART signaling. Its internal architecture combines the USB function controller, transceiver, oscillator, ROM, UART logic, and modem-control functions on one die. The integrated USB transceiver avoids the need for external USB termination resistors, and the internal clock means the design does not require a crystal oscillator. These features are particularly useful when minimizing external component count in compact embedded products. Typical applications include firmware update and debug interfaces, programmable serial adapters, test-and-measurement equipment, industrial automation controllers, data-acquisition systems, and USB-to-UART cable designs. The dual-channel architecture allows two independent serial links to be exposed through one USB device connection, reducing host USB-port usage. PCB design should account for short USB traces, controlled return paths, adequate decoupling near the power pins, and a ground layout that minimizes noise coupling into the UART and USB paths. The QFN-24 package is small and has limited thermal and routing margin, so pin assignment, exposed-pad grounding, and assembly requirements should be followed exactly as described in the manufacturer datasheet. This page combines the supplied manufacturer and distributor information, verified availability data, and practical interface-design guidance. It also identifies the available drop-in alternatives without inferring specifications that are not present in the supplied source material.
CP2108-B01-GM USB 2.0 Quad-UART 64-QFN Bridge
The Silicon Labs CP2108-B01-GM is a single-chip USB 2.0 full-speed to quad-UART bridge with an integrated transceiver, oscillator, EEPROM, 16 digital I/O pins, and four asynchronous serial data buses in a compact 9 mm x 9 mm 64-pin QFN package. Its USB interface provides a simple path for bringing legacy RS-232 and RS-485 designs onto USB, while the four UART channels support simultaneous serial connections. A USB-to-UART bridge is an interface IC that translates a USB host transaction into one or more UART signals for serial peripherals. This device belongs to the USB interface-controller and UART-interface hierarchy, with USB 2.0 full-speed connectivity, four serial channels, modem-control signals, and on-chip customization storage. The B01-GM ordering code identifies the manufacturer's device and package configuration; the manufacturer datasheet also identifies B01-GM as a revision marking. The CP2108 includes four asynchronous UART data buses with full modem-control signals. Its on-chip EEPROM can customize the USB Vendor ID, Product ID, product description string, power descriptor, device release number, and interface strings. The USB product page identifies 16 digital I/O pins and a 9 x 9 mm QFN64 package. The manufacturer documentation describes the CP2108 as a USB 2.0-compliant device suitable for multiport serial-interface designs. Because the device combines USB control, four UART channels, EEPROM customization, and digital I/O in one package, it can reduce the component count and PCB area of a four-port serial bridge. The integrated USB transceiver and oscillator simplify the host-side connection compared with a discrete USB implementation. Four UART ports allow equipment such as test systems, instrumentation, industrial controllers, and service equipment to expose multiple serial devices through one USB connection. Typical system implementation places the CP2108 between a USB connector and four external serial ports. Board design must preserve the datasheet pin assignments, provide the required decoupling and power routing, and account for the exposed-pad thermal and electrical requirements of the QFN package. Host software must use a compatible CP210x USB-to-UART driver, while USB VID, PID, and product strings can be managed through the supported customization process described by the manufacturer. The CP2108-B01-GM is useful when a product needs four UART channels, modem-control signals, digital I/O, and a compact USB interface. It is also suitable for legacy serial designs that need to migrate to USB without retaining a large collection of external interface components. Its key design tradeoff is integration versus firmware support: the device simplifies hardware, but the host must have compatible drivers and the firmware must handle four independent UART channels and any required custom USB identity. This page summarizes the verified manufacturer and distributor references, the CP2108 family architecture, package information, and practical replacement considerations. Because the provided data does not expose every electrical limit, pin-level function, lifecycle statement, or current distributor price for the exact CP2108-B01-GM, those fields are marked as needed rather than estimated.
CP2108-B01-GMR - USB-to-Quad-UART Bridge | Silicon Labs | 64-QFN
The Silicon Labs CP2108-B01-GMR is a highly integrated single-chip USB-to-Quad-UART bridge controller that provides a compact, low-component-count solution for upgrading legacy RS-232/RS-485 designs to USB. The device integrates a USB 2.0 full-speed function controller, USB transceiver, internal oscillator, quad UART, and 512-byte one-time-programmable (OTP) EEPROM in a 64-pin QFN (9x9 mm) package with exposed pad for thermal dissipation. A USB bridge controller is a mixed-signal interface IC that converts between USB protocol on the host side and asynchronous serial (UART) protocol on the device side, enabling microcontrollers and legacy RS-232/RS-485 peripherals to communicate over USB without an external PHY or complex firmware stack. Within the broader taxonomy, the CP2108 is a USB-to-UART bridge, a subclass of USB interface ICs, which falls under interface ICs and, ultimately, integrated circuits for power management and data connectivity. Key features include four independent UART channels with data rates from 300 baud to 2 Mbaud, support for hardware and software flow control (XON/XOFF, RTS/CTS, DTR/DSR), GPIO pins (GPIO.0 through GPIO.15) for modem signals or general purpose I/O, royalty-free virtual COM port (VCP) drivers for Windows/Mac/Linux, and an integrated 5 V to 3.3 V LDO that allows bus-powered or self-powered operation directly from the USB VBUS rail. The CP2108 uses an internal 48 MHz oscillator plus PLL, eliminating the need for an external crystal on most designs. An on-die OTP ROM of 512 bytes holds customizable USB descriptor fields (VID, PID, serial number, manufacturer string), letting OEMs configure the device for plug-and-play without external EEPROM. The exposed-pad QFN-64 package keeps the thermal resistance (theta_JA) low enough for industrial temperature operation without additional heatsinking. Typical applications include industrial multi-port serial hubs, point-of-sale (POS) terminals, RS-485 multi-drop building automation networks, USB-to-RS-232 dongles with quad-port expansion, embedded development boards exposing four UART debug channels to a single USB-C port, and instrumentation with multiple serial peripherals. The four-channel design is particularly compelling where engineers previously stacked multiple single-channel CP2102/CP2103 bridges. When designing with this part, place a 4.7 uF X5R ceramic bypass capacitor on VBUS and a 1 uF X5R on VIO, both within 3 mm of their respective pins, and stitch the exposed pad with at least eight thermal vias to an inner ground plane. Tie any unused GPIO pins to GND through 100 kohm resistors to avoid floating inputs on the UART lines, and update the OTP via the Silicon Labs CP210x production tools for field-installed units. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found directly in the manufacturer datasheet, providing comparison views and FAQ content designed to be quotable by engineers and AI assistants.
CP2108-B02-GM USB 2.0 to Quad-UART Bridge | Silicon Labs
The Silicon Labs CP2108-B02-GM is a single-chip USB 2.0 full-speed to quad-UART bridge controller with 16 digital I/O pins, four asynchronous serial buses, and full modem-control signals in a compact 64-pin QFN package measuring 9 mm x 9 mm. Its integrated USB controller, transceiver, oscillator, EEPROM, and four UART interfaces reduce external component count while providing one USB connection for four serial ports. A USB-to-UART bridge is an interface controller that translates USB traffic from a host into one or more UART streams and transfers UART data back to the host. The CP2108 belongs to the USB bridge controller category, within interface ICs and broader computer-interface semiconductors. It is intended for updating legacy RS-232 and RS-485 designs, industrial equipment, data acquisition systems, and multiport serial adapters. The verified manufacturer data identifies USB 2.0 full-speed operation, four UART interfaces, full modem controls, 16 digital I/O pins, on-chip EEPROM customization, and a 64-QFN package. The EEPROM can store USB VID, PID, product-description strings, power-descriptor information, device release numbers, and interface strings, allowing one device design to support product-specific USB enumeration requirements. Royalty-free drivers are also identified on the manufacturer product-page result. The bridge consolidates four UART channels and digital control lines behind one USB port, reducing connector count and PCB area compared with four discrete USB-to-serial devices. Its 9 mm x 9 mm QFN package supports compact embedded designs, but the exposed thermal and electrical layout must follow the manufacturer’s recommended footprint and decoupling requirements. Detailed voltage ranges, UART baud-rate limits, current limits, operating-temperature limits, and pin-level electrical thresholds are not present in the supplied verified excerpts and therefore are not inferred here. Typical applications include industrial serial gateways, four-port RS-232 adapters, RS-485 equipment with external transceivers, programmable automation controllers, instrumentation, and USB-to-quad-UART test fixtures. The bridge is especially useful when legacy peripherals require independent UART channels but the enclosure must expose only one USB connector. Designers should verify driver support for the target operating system, confirm that all required modem-control signals are externally reachable, and route USB differential pairs as a controlled-impedance pair. The 64-QFN footprint also demands careful assembly planning because lead spacing is too fine for conventional through-hole hand soldering; a reflow profile and land-pattern review should be validated before volume production. This page consolidates the verified manufacturer and distributor facts, distinguishes documented functions from unavailable specifications, and adds practical guidance for USB layout, firmware compatibility, and four-UART system integration.
CP2108-B02-GMR USB 2.0 to Quad-UART 64-QFN
The Silicon Labs CP2108-B02-GMR is a single-chip USB 2.0 to quad-UART bridge controller with four UART channels, a 3.3 V supply, and a 64-pin QFN exposed-pad package measuring 9 mm by 9 mm. It is designed to replace legacy RS-232 and RS-485 interface connections with USB while minimizing external components and PCB space. The integrated bridge handles USB-to-serial protocol conversion, UART signal interfacing, and enumeration-related device communication through its USB interface. A USB-to-UART bridge is an interface controller that connects a USB host to one or more asynchronous serial ports. In the broader electronics hierarchy, it belongs to interface ICs and USB interface controllers rather than a general-purpose microcontroller. The CP2108 family is particularly useful when a product needs multiple COM ports, legacy serial peripherals, service interfaces, or industrial equipment connectivity without allocating separate USB-to-serial adapters. Verified distributor and manufacturer information identifies the device as supporting USB 2.0, low-speed or full-speed operation, four UART channels, and a 3.3 V operating supply. Its 64-QFN exposed-pad construction supports compact surface-mount layouts while providing a defined thermal and ground connection through the exposed pad. Tape-and-reel ordering is represented by the GMR suffix, and the supplied distributor listings identify the component as a 64-QFN USB bridge. The CP2108 is appropriate for industrial control adapters, test equipment, multiport serial hubs, embedded systems, and legacy peripheral upgrades. Its quad-UART architecture can reduce the number of discrete interface components needed when several serial channels share one USB connection. Firmware and host-driver deployment should be checked against the manufacturer’s current software support before production release, especially where an existing product has an established USB device identity. A key design consideration is that USB-to-UART conversion does not automatically make an RS-232 or RS-485 physical layer. The external transceiver, connector, protection network, and cable requirements remain application-specific. Layout should preserve short USB differential routing, provide the required supply and ground-plane integrity, and use the exposed-pad land pattern specified by the manufacturer. This page consolidates verified manufacturer and distributor information, a cautious replacement assessment, and practical interface considerations that are not available from a raw distributor listing. Exact pin-level details, electrical limits, lifecycle status, and pricing beyond the supplied listing should be confirmed against the current CP2108 datasheet and distributor records.
CP2108-B03-GM - USB 2.0 to Quad-UART Bridge | Silicon Labs
Silicon Labs CP2108-B03-GM is a USB 2.0 full-speed interface bridge with four asynchronous UART channels, 16 digital I/O pins, and customizable on-chip EEPROM, housed in a 64-QFN package measuring 9 mm by 9 mm. It operates from a 3 V to 3.6 V supply and integrates a USB function controller, USB transceiver, oscillator, EEPROM, and four UART interfaces with full modem-control signals. A USB-to-UART bridge is an interface IC that connects a USB host to one or more legacy serial ports. Within the product hierarchy, the CP2108 belongs to interface bridges, then USB interface controllers, interface ICs, and integrated circuits. This integration lets equipment designers add four serial channels without implementing separate USB controllers, transceivers, oscillators, and discrete serial-interface circuitry on the printed circuit board. The verified feature set includes USB 2.0 operation, four UART data buses, full modem-control signals, 16 digital I/O pins, and EEPROM fields for custom USB identifiers and descriptors. The EEPROM can store USB Vendor ID, Product ID, product description, power descriptor, release number, and interface strings. This configurability supports product differentiation while retaining a common USB-to-serial controller design. Silicon Labs positions the CP2108 as a plug-and-play bridge with royalty-free drivers. The four UART channels provide independent asynchronous serial connections for control, data, instrumentation, or service functions, while the digital I/O pins add discrete digital signaling. Exact UART baud-rate limits, current consumption, operating-temperature limits, pin names, and electrical timing values were not included in the supplied verified data and therefore require confirmation from the manufacturer datasheet. Typical applications include industrial test equipment, multiport serial adapters, instrumentation, POS terminals, embedded systems, and legacy RS-232 or RS-485 equipment being modernized through USB. In each design, the host driver enumerates the bridge and exposes its four UART interfaces while the on-board controller manages the USB transaction scheduling and asynchronous byte transfer. The main PCB consideration is that a 64-QFN footprint requires a land pattern capable of routing USB, ground, UART, modem-control, and digital-I/O signals. Place the device near the USB connector, keep high-speed USB traces short and impedance-controlled, connect decoupling close to the supply pins, and maintain the datasheet-specified ground and exposed-pad connections. This page combines verified manufacturer and distributor data, strict package-aware substitution screening, application guidance, and practical integration notes. The alternatives list intentionally excludes single-port bridges and devices with different packages because they are not verified pin-to-pin drop-in replacements.
CP2108-B03-GMR - USB to Quad UART Bridge, QFN-64 | Silicon Labs
The Silicon Labs CP2108-B03-GMR is a highly integrated single-chip USB-to-Quad-UART bridge controller providing four asynchronous serial data buses with full modem control signals through a USB 2.0 full-speed interface, housed in a compact 9 mm x 9 mm 64-pin QFN package. It integrates a USB 2.0 full-speed function controller, USB transceiver, internal oscillator, EEPROM, and four UART engines in a single die, operating from a single 3.0 V to 3.6 V supply. The revision B03 variant adds multi-IO configuration support and GPIOs that map directly to application-specific handshake and status lines. A USB-to-UART bridge is a device-class converter that translates USB packets into asynchronous serial frames, enabling legacy RS-232/RS-485 peripherals, sensors, and microcontrollers to communicate with a modern host that has dropped legacy COM ports. Within the broader interface IC taxonomy, the CP2108 sits in the bus bridge sub-category (USB bridge -> bridge IC -> interface IC -> integrated circuit), using the USB Communications Device Class (CDC) on the host side and a transparent UART on the device side to eliminate firmware-side protocol stacks. Key features include four independent UART channels each supporting hardware flow control (RTS/CTS), programmable baud rates from 300 bps to 921.6 kbps, on-chip EEPROM for custom VID/PID and product-string storage, and a built-in 3.3 V LDO that can supply external logic up to 100 mA. The internal clock generator removes the need for an external crystal, and an integrated power-on reset circuit ensures clean enumeration even on noisy USB VBUS rails. Typical applications cover industrial multi-port serial hubs, point-of-sale terminals with cash drawer / scanner / barcode-reader / printer ports, RS-232/RS-485 field-service dongles, multi-drop Modbus gateways, and test-and-measurement fixtures that aggregate several UART instruments onto one USB port. The combination of four independent UARTs, a CDC driver stack provided by Silicon Labs, and BOM-saving integration reduces PCB area and BOM cost versus building four CP2102 bridges. Designers should pay attention to USB 2.0 signal-integrity on the upstream port - keep the D+/D- traces 90 ohm differential, length-matched, and routed over a continuous reference plane. The internal 3.3 V LDO is intended for light logic-rail loads; do not power RF stages from REG3V3. Suspend current is well below the USB 2.0 specification, so bus-powered designs typically pass gold-tree compliance without extra load switches.
CP2109-A01-GM - USB 2.0 to UART Bridge | Silicon Labs
The Silicon Labs CP2109-A01-GM is a single-chip USB-to-UART interface bridge with USB 2.0 connectivity, a 3.3 V to 3.6 V supply range, and a 28-QFN package measuring 5 mm by 5 mm. It adds one USB-to-serial interface without requiring an external USB transceiver, crystal, or resistor network. According to the verified distributor and manufacturer-material summaries, the device is intended for embedded data acquisition, programming, control, and industrial communication systems. A USB-to-UART bridge is an interface controller that translates between a host computer's USB transaction protocol and a UART data stream using differential signaling on one side and logic-level serial signaling on the other. It belongs to the interface-controller and data-conversion hierarchy: USB bridge → UART interface controller → serial interface IC → semiconductor. Its primary engineering value is reducing firmware and hardware complexity while providing a standard serial connection for embedded products. The CP2109 family integrates an internal USB transceiver, an integrated clock, and an on-chip power-on reset circuit. The verified CP2102/CP2109 datasheet summary also describes programmable on-chip memory for USB descriptors and device identification data. For CP2109, the one-time-programmable memory provides customized product information, while vendor configuration requirements and programming implications must be reviewed before production use. The interface supports low-speed and full-speed USB operation according to the verified component summaries. USB 2.0 identifies the peripheral-side interface standard, while UART data is exposed through the device's serial pins. Designers should use the manufacturer's pinout, reference circuit, and interface guidelines because signal routing, grounding, exposed-pad connection, supply filtering, and host-driver behavior are essential to reliable operation. Typical uses include industrial instrument service ports, machine controllers, test equipment, USB-to-serial adapters, embedded development boards, and field-upgrade interfaces. The 5 mm by 5 mm QFN package supports compact designs, but its exposed thermal pad requires careful PCB layout and an adequate ground or thermal plane. Unlike a large legacy serial connector implementation, the bridge can add USB connectivity while preserving the firmware-facing UART model. For each new design, confirm the exact USB speed, UART baud-rate and electrical limits, supply sequencing, crystal-free clocking conditions, descriptor programming method, and exposed-pad layout against the current manufacturer datasheet. Do not infer those missing values from distributor category labels alone. This page consolidates verified sourcing information, procurement context, technical gaps, and design cautions around the CP2109-A01-GM, helping engineers separate confirmed facts from parameters that still require manufacturer-documentation confirmation.
CP2109-A01-GMR - USB to UART Bridge, 28-QFN | Silicon Labs
The Silicon Labs CP2109-A01-GMR is a USB 2.0 to UART bridge controller housed in a 28-pin QFN (5x5 mm) package with exposed pad, designed to add USB connectivity to embedded designs without requiring external firmware development. According to verified distributor data, it operates from a 3.0 V to 3.6 V supply, supports USB 2.0 full-speed (12 Mbps), and integrates an internal oscillator plus 640-byte FIFO buffer for high-throughput UART bridging across baud rates from 300 bps to 1 Mbaud. The -GMR suffix indicates a tape-and-reel packaging variant of the CP2109-A01 family. A USB to UART bridge is a class of interface controller IC that translates USB signaling from a host computer into asynchronous serial (UART) data consumable by microcontrollers, FPGAs, or other digital devices that lack native USB ports. In the broader component taxonomy, it sits under USB Bridge Controllers -> Interface ICs -> Integrated Circuits, providing a 'drop-in cable replacement' path for legacy RS-232 designs transitioning to USB connectivity. The CP2109 family is part of Silicon Labs' CP210x USBXpress lineage, which includes the CP2102N, CP2104, CP2105, and CP2108 bridges. Key features confirmed across distributor listings include a built-in USB 2.0 full-speed transceiver (12 Mbps), integrated voltage regulator requiring minimal external components, hardware XON/XOFF flow control, support for 5/6/7/8 data bits, and royalty-free Virtual COM Port (VCP) drivers for Windows, macOS, and Linux. The internal 640-byte receive and transmit FIFO enables efficient burst transfers without host-side throttling, and the device supports bus-powered and self-powered USB topologies. Architecturally, the CP2109-A01-GMR combines a USB PHY, a 48 MHz internal oscillator, an 8051-compatible controller core running Silicon Labs' USBXpress firmware, and a UART engine. The device uses a serial debug interface (SDI) or USB for firmware updates and configuration, with the standard CP2109 variant shipping as a turnkey VCP bridge that requires no user firmware. The exposed pad on the QFN-28 package must be soldered to the ground plane for thermal dissipation and signal integrity. Typical applications include industrial USB-to-RS232 adapters, point-of-sale (POS) terminals, USB dongles for firmware programming, barcode scanner interfaces, GPS module USB bridges, and embedded debug consoles. Per Mouser's category assignment, the CP2109-A01-GMR is classified as an I/O Controller Interface IC, confirming its bridge role. When designing with this part, note that the maximum supply voltage is 3.6 V; operating at 5 V systems requires an external LDO. Decoupling the VBUS and VDD pins with 4.7 uF and 0.1 uF ceramic capacitors close to the IC is recommended, and the exposed pad must be soldered to a ground pour for stable USB signaling. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone CP2109 datasheet PDF.
CS3308-CQZR - 8-Ch Analog Volume Control, 48-LQFP | Cirrus Logic
The Cirrus Logic CS3308-CQZR is a high-performance, low-power, 8-channel digitally controlled analog volume control IC designed for high-end audio systems, housed in a 48-pin LQFP (7x7 mm) package with surface-mount mounting. Key specifications include 8 independent volume channels, configurable zero-crossing detection for glitch-free level changes, a serial control interface compatible with I2C and SPI, a supply voltage range of 3.1 V to 5.25 V, and the ability to address up to 128 CS3308 devices on a single 2-wire I2C or 3-wire SPI bus for high-channel-count systems. The device targets professional audio equipment and consumer electronics that demand clean, click-free volume transitions. A digital volume control IC is an integrated circuit that performs attenuation or amplification of analog audio signals under the command of a microcontroller or DSP, replacing mechanical potentiometers in modern equipment. Within the audio signal chain, it sits between the source selector or DAC output and the power amplifier, and it belongs to the broader family of audio special-purpose ICs alongside DACs, ADCs, and audio amplifiers. Compared with mechanical potentiometers, a digitally controlled attenuator offers precise repeatability, remote control, memory recall, and absence of mechanical wear. Key features of the CS3308-CQZR include 8 independent channels with 0.5 dB step resolution, configurable zero-crossing detection to eliminate zipper noise during volume changes, a wide supply range of 3.1 V to 5.25 V suitable for 3.3 V and 5 V system rails, selectable I2C or SPI serial control interface, and hardware-addressable device IDs that allow up to 128 cascaded devices on a single bus. The combination of fine resolution and zero-crossing logic preserves audio signal integrity during level transitions. Technically, the CS3308 uses a resistive ladder network with CMOS switches and an internal zero-crossing detector that holds the wiper position until the audio waveform crosses zero, suppressing audible artifacts. The architecture provides very low total harmonic distortion plus noise (THD+N) and high channel-to-channel matching, which are essential parameters for multi-channel professional audio gear. Programmable address pins enable bus expansion without adding microcontroller I/O. Typical applications include professional audio mixing consoles, multichannel AV receivers and amplifiers, broadcast studio equipment, automotive head units and infotainment amplifiers, and home theater preamplifiers. In each case the CS3308 replaces mechanical or electromechanical volume controls with a precise, software-driven solution that supports remote control and preset recall. When designing with the CS3308-CQZR, ensure that analog input signals remain within the recommended common-mode and clip range, place bypass capacitors close to the supply pins, and verify I2C/SPI address selection when stacking multiple devices on the same bus. The LQFP-48 footprint gives good thermal performance for continuous signal-path operation. This page synthesizes current distributor pricing and stock, drop-in alternatives with the same 48-LQFP footprint, and practical design notes not consolidated in the manufacturer datasheet, delivering actionable information for both new designs and legacy audio system refreshes.
CS4205-KQ - AC'97 Stereo Audio Codec | Cirrus Logic
The Cirrus Logic CS4205-KQ is an AC'97 2.1-compliant stereo audio codec designed for PC multimedia systems, portable computing, and docking-station equipment. It uses CrystalClear delta-sigma and mixed-signal technology and is offered in a 48-pin LQFP package measuring 7 mm by 7 mm. Distributor records identify the interface as a 20-bit serial audio codec with 18-bit resolution on one associated serial interface. An audio codec is an interface IC that converts digital audio data into analog signals and analog audio inputs into digital data. In the signal chain, it sits between a host audio controller and external microphones, speakers, line inputs, or line outputs. AC'97 is a legacy Intel-defined audio interface that combines serialized digital audio with control, status, and general-purpose digital signals. The CS4205 therefore belongs to the broader audio codec, multimedia interface, and signal-conversion IC categories. The manufacturer datasheet identifies the CS4205 as a stereo co-dec for portable-computing systems. Its AC'97 2.1 compliance supports host-controlled multimedia operation, while CrystalClear delta-sigma and mixed-signal circuitry provides the analog-to-digital and digital-to-analog conversion functions. The 48-LQFP package exposes the complete AC'97 interface and associated analog and power connections on a compact surface-mount footprint. Technical implementation requires care because an audio codec combines sensitive analog inputs with a high-speed digital bus. The codec must be connected to a compatible AC'97 controller, supported audio drivers, analog input and output circuitry, and correctly decoupled supply rails. Clocking, digital signal integrity, analog grounding, output loading, and the relationship between the codec's sample rate and system timing must all be evaluated against the manufacturer datasheet. Typical uses include notebook-computer multimedia subsystems, docking stations, portable audio hardware, and legacy PC docking solutions. The Cirrus Logic CS4205 is particularly relevant when maintaining or repairing an existing AC'97 platform rather than designing a new system around a modern USB or I2S audio interface. Its stereo codec function supports the familiar PC multimedia architecture but requires legacy host, driver, and connector support. Designers should preserve the manufacturer's recommended decoupling and analog-layout practices and verify the exact pin assignments and signal names against the device documentation. AC'97 implementations can be sensitive to trace impedance, grounding, clock jitter, and power-supply noise. Because the CS4205-KQ is a legacy peripheral-oriented codec, software-driver availability and the continued support of the surrounding platform are as important as electrical compatibility. This page consolidates verified distributor availability, pricing, interface details, package information, and application context. It also distinguishes documented drop-in alternatives from related legacy codecs, helping engineers avoid treating a merely similar audio codec as a guaranteed pin-to-pin replacement.
CS4207-CNZR - 4-In/6-Out HD Audio Codec w/ HP Amp | Cirrus Logic
The Cirrus Logic CS4207-CNZR is a highly integrated, multi-channel, low-power HD Audio Codec combining 192 kHz DACs, 96 kHz ADCs, 192 kHz S/PDIF transmitter and receiver, microphone preamp with bias voltage, and a ground-centered headphone driver, all in a 48-pin QFN (6x6 mm) package. The device operates from a single 3.3 V digital supply and a 5 V analog supply, delivers 24-bit serial audio data, and supports both HDA (HD Audio) and I2S serial interfaces to host controllers. An HD Audio Codec (High Definition Audio Codec) is a mixed-signal IC that converts digital audio streams from a PC/system chipset into line out the headphone, line stage, and microphone signals using internal DACs, ADCs, and headphone amplifiers. The codec sits in the audio signal chain between the host controller (e.g., Intel HDA-compliant chipset) and the analog transducers, and the term "HD Audio" denotes compliance with the Intel HDA Link specification rather than a frequency or bit-rate definition. CS4207-CNZR occupies the power-management IC and interface-IC tier of the audio subsystem, replacing multiple discrete ADCs, DACs, S/PDIF transceivers, and headphone amps with one package. The codec is the culmination of the signal chain (digital I/O -> mixed-signal codec -> analog out). Key features of the CS4207-CNZR include a multibit Delta-Sigma modulator architecture that enables infinite sample-rate adjustment from 32 kHz to 192 kHz, integrated ground-centered headphone driver (no DC blocking capacitors required at the output), microphone preamp with bias voltage source, and digital microphone interface support. The device supports 4 analog line/microphone inputs and 6 analog outputs, providing flexible routing for desktop, notebook, and embedded audio platforms. S/PDIF transmitter and receiver operate up to 192 kHz, allowing simultaneous digital audio transmission and reception. Technical depth: the Delta-Sigma modulator multibit topology achieves higher dynamic range and linearity than single-bit designs, while the ground-centered headphone architecture eliminates large output coupling capacitors, reducing BOM cost and improving low-frequency bass response. The codec integrates digital mixing, gain control, and jack-presence detection through the HDA link, simplifying host-driver interaction. Typical applications include desktop and notebook PC audio subsystems, all-in-one motherboards, embedded media players, and HD Audio-compatible docking stations. The wide format compatibility (HDA + I2S) and integrated HP amp make CS4207 well-suited for ultra-thin notebooks and small-form-factor designs where PCB area is constrained. When designing with this device, place the analog supply decoupling capacitors as close to the AVDD pins as possible to minimize analog-domain interference, and follow Cirrus Logic reference layout for the headphone output return paths to maintain low THD+N. The integrated HP amp eliminates external coupling capacitors but requires careful ground-centered routing to preserve low noise. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet. Engineers comparing HD Audio codec options for desktop/notebook designs will find the application notes, thermal considerations, and HDA source documents consolidated in this page.
CS4216-KL - 16-Bit Stereo Audio Codec | Cirrus Logic
Cirrus Logic CS4216-KL is a monolithic CMOS 16-bit stereo audio codec with integrated analog-to-digital and digital-to-analog conversion, filtering, and level setting. The device provides four audio inputs and two audio outputs for computer multimedia systems, supports word rates up to 50 kHz, and multiplexes left- and right-channel digital audio onto one serial data bus. It is supplied in a 44-pin PLCC package measuring 16.59 mm by 16.59 mm. An audio codec is a mixed-signal interface IC that converts audio between analog and digital domains. Its hierarchy is audio codec, multimedia codec, analog-to-digital and digital-to-analog converter, interface IC, and semiconductor. The CS4216 combines those functions so a digital computer system can accept analog audio sources, process samples digitally, and reproduce them through analog outputs without separate converter packages. Key capabilities include 16-bit stereo conversion, four analog inputs, two analog outputs, integrated interpolation and filtering functions, and a shared serial data interface. The CS4216 family targets computer multimedia, automotive, and portable audio equipment. Its integrated filtering and level-setting functions simplify board partitioning, while its multiplexed digital bus reduces the number of interconnects required between the codec and host or digital-audio controller. Technically, the monolithic CMOS implementation combines two conversion channels with shared digital serialization. Interpolation filters suppress unwanted high-frequency content and reduce aliasing in the reconstruction path, while the digital interface carries both stereo channels using word rates up to 50 kHz. The 44-pin PLCC offers a surface-mount package with J-lead termination and a body size of 16.59 mm by 16.59 mm. Typical uses include desktop and notebook multimedia audio, portable-audio equipment, automotive audio systems, and embedded systems requiring simultaneous analog capture and playback. In these applications, the four inputs can serve microphones, line-level sources, or other analog audio points, while the two outputs feed downstream amplifiers or audio routing stages. Host connectivity still requires correct timing, format, and signal-level design. The main design consideration is package and signal planning. Because the converter is a 44-pin PLCC rather than a modern leadless package, its footprint has limited long-term layout flexibility. Board layout should preserve analog and digital return paths, provide suitable bypassing, and follow the manufacturer's pin and reference-circuit guidance rather than assuming a generic codec footprint. This page consolidates the verified CS4216-KL identity, package, converter topology, application fit, and verified drop-in alternatives. It also distinguishes documented capabilities from parameters that still require confirmation from the manufacturer datasheet or a live distributor quotation.
CS4221-KS - 24-Bit Stereo Audio Codec | Cirrus Logic
Cirrus Logic CS4221-KS is a 24-bit stereo audio codec with a 3 V interface, integrating stereo analog-to-digital and stereo digital-to-analog converters in a 28-pin SSOP package. The device supports audio sampling up to 50 kHz according to distributor product data and uses delta-sigma conversion techniques for both converter directions. Its serial interface and mixed-signal codec architecture are intended to reduce the component count in digital audio equipment. An audio codec is an interface IC that converts analog audio signals into digital data and digital audio data back into analog signals. Within the broader semiconductor hierarchy, a codec belongs to the audio interface and signal-conversion class of integrated circuits. The CS4221-KS therefore serves as the bridge between an external digital audio processor or controller and external analog input and output circuitry, rather than functioning as a complete audio playback system by itself. The principal verified features include 24-bit resolution, simultaneous stereo ADC and DAC functionality, a 3 V interface, serial digital connectivity, and a maximum stated sampling frequency of 50 kHz. These attributes suit equipment requiring compact digital-audio conversion at a conventional CD-oriented sample rate. The integrated stereo topology also helps minimize the number of external converter channels required in a stereo design, although the application still needs suitable input and output analog circuitry. The CS4220 and CS4221 family uses delta-sigma conversion, according to the manufacturer datasheet summary reproduced by the verified search results. Delta-sigma conversion shapes quantization noise into a digitally filtered form, supporting the device's stated 24-bit resolution. The available verified snippets do not expose the internal architecture, clock requirements, analog performance metrics, or digital interface mode in sufficient detail to characterize the converter further without unsupported assumptions. Typical uses include professional and consumer stereo audio equipment, digital mixing equipment, sound-card circuitry, multimedia appliances, and embedded audio systems that require both record and playback channels. The same 50 kHz limitation that makes the codec suitable for conventional stereo audio applications also makes it less appropriate for designs needing higher-rate professional audio, unless the complete system requirements are limited to 50 kHz. When laying out a CS4221-KS design, analog signal routing should be kept separate from digital clock and serial-data paths, and the power, ground, and bypass connections must follow the manufacturer's recommended application circuit. Because the supplied verified data does not include a complete pin table or decoupling values, engineers should verify pin assignments and recommended passive values against the official Cirrus Logic datasheet before release to production. This page consolidates the verified distributor specifications, package information, lifecycle observations, source links, selection guidance, and engineering considerations for CS4221-KS. It also distinguishes confirmed characteristics from parameters that require direct confirmation from the manufacturer datasheet, helping procurement and design teams avoid treating incomplete distributor metadata as a complete electrical specification.
CS4222-BS - 20-Bit Stereo Audio Codec | Cirrus Logic
Cirrus Logic CS4222-BS is a 20-bit stereo audio codec with volume control, integrating stereo analog-to-digital and stereo digital-to-analog converters in a 28-pin SSOP package. The device operates from a single +5 V supply and uses delta-sigma conversion techniques for its stereo conversion paths. These core characteristics make the CS4222-BS a monolithic audio interface IC for systems that require both digital-to-analog playback and analog-to-digital recording functions. An audio codec is a mixed-signal semiconductor that converts audio between digital data and analog voltage signals. Within the broader integrated-circuit hierarchy, a codec belongs to the interface and audio-converter class, combining an ADC, DAC, volume control, and associated analog circuitry in one device. The CS4222 family therefore reduces the number of separate converters required in a stereo audio system while simplifying synchronization and analog-output implementation. The verified manufacturer information identifies a 20-bit resolution, four-channel audio configuration, delta-sigma conversion architecture, and single +5 V operation. Its on-chip output buffer produces differential line-level outputs for the left and right channels. The documented nominal output is 2.83 Vpp, or 1 Vrms, for each single-ended output at full-scale digital input, with a 2.3 V common-mode voltage. The corresponding differential signal is 5.66 Vpp, or 2 Vrms). The CS4222-BS also incorporates volume control, allowing playback amplitude to be adjusted within the codec rather than solely through external analog gain stages. This integration can simplify system architecture, but the exact control interface, supported audio data formats, converter performance, clock requirements, and recommended external networks must be confirmed from the manufacturer datasheet before layout or firmware development. Those detailed values are not present in the supplied verified extracts and are therefore not inferred here. Typical implementation roles include legacy stereo multimedia systems, audio capture and playback modules, digital mixing equipment, and embedded audio subsystems requiring separate transmit and receive paths. In such equipment, the codec can accept digital audio at its ADC input and provide amplified analog left and right outputs for external coupling, headphone, or line-stage circuitry. Its differential outputs may offer better rejection of common-mode noise than single-ended outputs when paired with a balanced receiver. A critical design consideration is that the codec cannot be evaluated from resolution alone. Designers should verify the complete interface protocol, sample-rate range, clocking scheme, analog input range, output-load capability, power sequencing, and external component recommendations in the manufacturer datasheet. The documented 10 kΩ output loading must also be respected because heavier loads can alter output level and distortion even if the nominal operating voltage remains correct. This product page consolidates verified CS4222-BS specifications, distributor availability references, package information, and engineering guidance into one searchable source. It also separates documented data from unresolved parameters, helping engineers avoid unsupported assumptions while evaluating this audio codec for a new or legacy PCB design.
CS4222-DS - 20-Bit Stereo Audio Codec | Cirrus Logic
Cirrus Logic CS4222-DS is a 20-bit stereo audio codec with volume control, integrating analog-to-digital and digital-to-analog conversion in a 28-pin SSOP package. The device operates from a single +5 V supply and supports four-channel volume control according to the DigiKey product listing. Its delta-sigma conversion architecture, onboard output buffering, and differential line-level outputs make it suitable for multichannel consumer audio, sound-card, mixer, and digital-audio-interface equipment. An audio codec is an interface IC that converts analog sound into a digital bitstream and reconstructs digital audio into analog signals. In the broader semiconductor hierarchy, a codec belongs to interface ICs and audio codecs, combining mixed-signal converters with digital control and analog output circuitry. The CS4222 therefore provides both signal conversion and system-level volume management rather than operating only as a conventional digital interface controller. The CS4222 provides 20-bit stereo conversion and uses delta-sigma conversion techniques. Its on-chip buffer amplifier generates differential outputs capable of driving 10 kW loads, as stated in the CS4222 datasheet. Each output produces a nominal 2.83 Vpp, or 1 Vrms, signal for a full-scale digital input. The common-mode voltage is 2.3 V, and the two sides of each differential channel can represent a 5.66 Vpp, or 2 Vrms, differential signal. The single-supply architecture simplifies analog system design around a conventional +5 V rail. Digital control and analog conversion are consolidated in one IC, reducing the number of separate converters required in a stereo design. The integrated volume-control function can simplify control layout in systems that need programmable attenuation between digital sources and line-level outputs, although software control details and supported register values must be confirmed in the manufacturer datasheet before implementation. Typical uses include stereo sound cards, compact multimedia systems, powered speakers, home-audio preamplifiers, mixer inputs, USB or FireWire audio interfaces, and industrial monitoring equipment. The differential outputs are particularly useful when the downstream analog stage benefits from common-mode rejection and reduced susceptibility to ground-borne noise. Board-level filtering and grounding remain important because digital activity from the codec can couple into sensitive analog paths if the layout does not separate converter and output-current return paths. Designers should follow the recommended external component network shown in the Cirrus Logic CS4222 datasheet and preserve the differential output topology. Input and output decoupling should be placed close to the appropriate supply and signal pins, while analog and digital return currents should be routed carefully on mixed-signal boards. The 28-pin SSOP footprint is not interchangeable with leaded or differently pin-counted codecs without a PCB redesign. This product page consolidates verified distributor pricing, package information, converter performance, application guidance, and sourcing data. It also distinguishes verified CS4222-DS facts from parameters that still require confirmation, avoiding unsupported claims about equivalent codecs, exact pin functions, lifecycle guarantees, or unreported electrical limits.
CS4223-BS - 24-Bit 105dB Stereo Audio Codec | Cirrus Logic
The Cirrus Logic CS4223-BS is a 24-bit, 105 dB dynamic-range stereo audio codec with integrated analog-to-digital and digital-to-analog converters, operating from a single +5 V supply in a 28-pin SSOP package. The converter uses delta-sigma conversion techniques, and the CS4223-BS configuration is identified by distributor data as a stereo codec without volume control. An audio codec is an interface IC that converts analog sound signals into digital data and reconstructs digital audio into analog signals. A codec belongs to the broader interface IC and signal-conversion hierarchy, combining an ADC, DAC, digital audio interface, clocking, and associated analog support functions. This integration reduces the number of external converters required in CD players, DVD systems, automotive audio equipment, consumer electronics, and other stereo-audio systems. Key features include 24-bit audio resolution, a specified signal-to-noise ratio of 105 dB, stereo ADC and DAC channels, delta-sigma conversion, and single +5 V operation. The 105 dB rating provides a concrete measure of the converter noise floor relative to the full-scale signal, while 24-bit words provide sufficient numerical resolution for professional and consumer audio paths. The 28-pin SSOP surface-mount package supports compact, board-level implementations. The device accepts digital audio through its serial audio interface and uses external clocking and synchronization signals for deterministic conversion. Delta-sigma architectures reduce the need for high-precision conversion components inside the signal path, although board layout, grounding, supply decoupling, and clock signal integrity remain important. Analog and digital sections should be routed to minimize coupling from switching nodes and high-current return paths. Typical applications include stereo CD and DVD audio, home-theater equipment, automotive sound systems, digital mixing consoles, multimedia appliances, and other systems requiring simultaneous analog-to-digital and digital-to-analog conversion. The CS4223-BS is appropriate where a 24-bit stereo codec and 105 dB dynamic range are required from one +5 V supply. Because the verified listing identifies this -BS option as lacking volume control, systems requiring an internal volume-control function should verify that requirement before design-in. For a new PCB, place all decoupling capacitors close to their supply pins, use a low-inductance ground reference, and route clock and data traces away from analog inputs. The +5 V rail should be filtered if nearby switching converters create ripple or high-frequency noise. Legacy-product risk should also be evaluated because the available cross-reference data labels the CS4223 family as obsolete and recommends consulting manufacturer lifecycle information before committing to a production run.