This part is a kind of semiconductor called PCM1742KE.
Function of this product has 24-Bit/ 192kHz Sampling Enhanced Multilevel/ Delta-Sigma/ Audio DIGITAL-TO-ANALOG CONVERTER.
Manufacturers : Burr-Brown Corporation
Image and pinout :
Some of the text within the PDF file :
PCM1742 PCM 174 2 www.ti.com 24-Bit, 192kHz Sampling Enhanced Multilevel, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER FEATURES q 24-BIT RESOLUTION q ANALOG PERFORMANCE (VCC = +5V): Dynamic Range: 106dB typ (PCM1742KE) 100dB typ (PCM1742E) SNR: 106dB typ (PCM1742KE) 100dB typ (PCM1742E) THD+N: 0.002% typ (PCM1742KE) 0.003% typ (PCM1742E) Full-Scale Output: 3.1Vp-p typ q 4x/8x OVERSAMPLING DIGITAL FILTER: Stopband Attenuation: –55dB Passband Ripple: ±0.03dB q SAMPLING FREQUENCY: 5kHz to 200kHz q SYSTEM CLOCK: 128, 192, 256, 384, 512, 768fS with Auto Detect q ACCEPTS 16-, 18-, 20-, AND 24-BIT AUDIO DATA q DATA FORMATS: Standard, I2S, and LeftJustified q USER-PROGRAMMABLE MODE CONTROLS: Digital Attenuation: 0dB to –63dB, 0.5dB/Step Digital De-Emphasis Digital Filter Roll-Off: Sharp o [ ... ]