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WM8947ECS/R

WM8947ECS/R Stereo Low-Power Audio Codec | Cirrus Logic

Cirrus Logic WM8947ECS/R is a stereo low-power audio codec IC supplied in a 25-ball WCSP package. The verified distributor information identifies the device as an interface and codec part, while the LCSC product listing states a price of $4.6743 as of 2026-10-29. A 25-WCSP package is designed for compact, high-density portable-device layouts where analog, digital, and power connections must be routed on a very small die area. The supplied search evidence does not expose the complete electrical specification set, so detailed signal-to-noise ratio, sampling-rate, voltage, channel, and amplifier ratings require confirmation in the manufacturer datasheet before design release. An audio codec is an interface IC that converts between digital audio data and analog microphone, line, or headphone signals. In the product hierarchy, a codec belongs to an audio interface IC, an interface IC, and ultimately the broader semiconductor category. This conversion function allows a host processor to play and capture audio while the codec handles the analog signal path, digital conversion, and associated filtering. The WM8947ECS/R is specifically identified by Mouser as a stereo low-power codec, making it relevant to portable and embedded multimedia equipment. The verified listings provide several procurement-level advantages: DigiKey classifies the WM8947ECS/R under codecs and interfaces, Mouser describes it as a stereo low-power codec, and LCSC lists the part as in stock. JLCPCB identifies the device as RoHS-compliant, while Wolfchip reported 23,560 pieces in stock on 2026-10-14. These facts support initial sourcing and compatibility work, but they do not replace verification of the electrical limits, exposed-ball assignments, thermal constraints, or supported digital audio interfaces. The part's principal engineering value is its combination of stereo codec functionality and a compact 25-WCSP implementation. WCSP construction can reduce board area compared with larger leaded or QFN packages, which is valuable in mobile and wearable products. That space advantage also makes correct PCB layout essential. Fine-pitch balls, a limited exposed-ball count, potential thermal-via requirements, and difficult visual inspection after assembly can complicate rework and signal-integrity implementation. Designers should obtain the official land-pattern and ball-listing information rather than infer connections from distributor pinout diagrams. Typical WM8947ECS/R applications include portable media players, smartphone accessories, compact audio accessories, wearable audio devices, and embedded multimedia systems. In each case, the codec would sit between a digital audio host and analog microphones, headphones, speakers, or line-level circuitry. Suitable companion components can include audio amplifiers, headphone drivers, microphones, and host-interface devices, but the exact companion choice depends on the power rails, grounding strategy, and acoustic architecture specified by the manufacturer. Before committing to a PCB revision, confirm the supported audio formats, master and slave clock arrangements, sample rates, microphone bias requirements, headphone and speaker outputs, digital and analog supply voltages, and permitted startup sequences in the official WM8947 datasheet. Also verify whether the WCSP has an exposed ground or thermal pad and which balls may be left unconnected. The supplied data does not establish a complete pinout, so no pin assignments are asserted on this page. This page consolidates verified distributor classification, current pricing, package information, stock observations, compliance evidence, and replacement-status findings for the WM8947ECS/R. It also distinguishes confirmed facts from parameters that remain unavailable in the supplied records, helping engineers make an initial sourcing decision without mistaking incomplete listings for a complete design specification.

WM8994ECS/R

WM8994ECS/R - Ultra-Low-Power Hi-Fi Audio Codec | Cirrus Logic

The Cirrus Logic WM8994ECS/R is an ultra-low-power, highly integrated Hi-Fi audio codec with a 24-bit I2S/PCM stereo audio interface in a 72-ball WCSP package measuring 4.52 mm by 4.03 mm. It supports smartphone and portable-device audio playback and recording, with integrated stereo Class D/AB speaker drive and Class W headphone drive to reduce the number of external audio amplifiers. An audio codec is a mixed-signal semiconductor that converts digital audio samples into analog signals and converts captured analog audio into digital data. The WM8994 belongs to the audio codec hierarchy within interface ICs, combining digital audio interfaces, analog converters, integrated amplifiers, clocking, and power-management functions. This consolidation reduces board area and power consumption in mobile multimedia systems. The verified product information identifies a 24-bit I2S/PCM interface, ultra-low-power operation, integrated stereo Class D and AB speaker drivers, and an integrated Class W headphone driver. The device requires two external supplies, Vbatt and 1.8 V, while integrated LDOs generate the other internal supply rails. This architecture is intended to lower external power-component count and simplify portable audio designs. Stereo full-duplex asynchronous sample-rate conversion and multi-channel audio support extend the codec beyond basic playback. Full-duplex conversion allows simultaneous playback and recording, including paths operating at different sample rates. The integrated speaker and headphone drivers move amplification closer to the codec, reducing dependence on discrete output stages in space-constrained consumer equipment. Typical uses include smartphones, tablets, portable media players, wearable devices, and other multimedia products. An application can route digital audio through the I2S/PCM interface while using the integrated Class W headphone driver for low-power headphone playback and the Class D/AB speaker path for higher-output speaker amplification. Designers should verify the complete pinout, absolute maximum ratings, clock requirements, exposed-ball layout, and decoupling recommendations from the manufacturer datasheet before layout. Because the supplied data does not include numeric converter performance, output power, sample-rate limits, or thermal data, those values must not be inferred from the product class. This page combines verified manufacturer and distributor information with structured specifications, application guidance, and replacement availability. It also distinguishes verified facts from parameters that require confirmation from the WM8994 datasheet, helping engineers make sourcing and design decisions without relying on unverified assumptions.