See datasheet for actual packaging/pinout drawings

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PCM1864CMBEVM-PCM1864 Circular Microphone Board (CMB) 103dB 4-Ch Software-Controlled Audio ADC With Universal Front End Evaluation Module

The PCM1864 circular microphone board (CMB) is a low-cost easy-to-use reference design for applications that require clear-spoken audio, such as voice triggering and speech recognition. This TI Design uses a microphone array to capture a voice signal, and converts it to a digital stream that can be used by DSP systems to extract clear audio from noisy environments.
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