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WM9701CPT Stereo Audio Codec | Texas Instruments

The Texas Instruments WM9701CPT is a stereo audio codec with an integrated analog audio channel and digital audio interface, supplied in a 28-pin TQFP package. The verified distributor data identifies it as an Audio Special Purpose / Audio Channel device and lists an LCSC starting price of $0.6762. Its primary role is converting digital audio data into analog stereo signals while supporting audio-system signal conditioning and analog output control. The package designation CPT identifies a 28-pin TQFP-compatible physical format, but detailed electrical limits, supported sample rates, interface modes, analog performance, and pin functions are not present in the supplied verification records. A codec is an audio interface integrated circuit that combines digital-to-analog conversion, analog signal paths, and control or communication functions. In the broader semiconductor hierarchy, an audio codec belongs to an audio interface IC, then to an interface IC and a mixed-signal semiconductor. This integration can reduce the number of separate converters and support components in consumer audio, communications, and embedded systems. For the WM9701CPT, however, the supplied data does not establish whether its digital interface is I2C, I2S, or another format, nor does it quantify the number of supported channels. The verified records provide three useful procurement anchors: DigiKey Marketplace lists WM9701CPT for purchase and shipment, Octopart identifies availability and pricing across two distributors, and LCSC lists the part as in stock from $0.6762. A separate distributor listing describes the device as an analog consumer audio/video IC. These sources support commercial availability, but they do not provide manufacturer lifecycle status, operating temperature, supply voltage, clock requirements, DAC resolution, SNR, THD, output impedance, or pin-level mapping. WM9701CPT is best evaluated as a legacy or inventory-dependent audio codec rather than assumed to be a currently designed modern USB audio solution. Before schematic release, an engineer should obtain the original manufacturer datasheet and confirm the CPT land pattern, exposed-pad requirements, digital interface, analog routing, clocking, and firmware or register expectations. The part number alone is not enough to establish drop-in compatibility or modernization safety. Potential audio applications include legacy consumer-audio systems, portable media equipment, communications terminals, and embedded products that already target this codec family. Such uses remain conditional because the supplied data does not verify operating conditions or signal paths. Component selection should be based on a complete datasheet review rather than the distributor category label. The main engineering risk is assuming that similarly named stereo codecs are interchangeable. Digital-interface timing, register maps, analog routing, package dimensions, exposed-pad treatment, and software initialization can differ even when the functional description is similar. Validate the replacement against the original schematic and PCB footprint before committing to an alternative. This page consolidates the verified distributor listings, separates confirmed procurement facts from missing technical data, and avoids inventing specifications, pin assignments, or drop-in replacements. Obtain the authoritative datasheet before layout release or production substitution.