DESCRIPTION

The CM3271 is the new generation ultra-low-power USB audio single chip designed especially for mobile USB-C headset,audio adapter or dock applications.It features cap-less/anti-pop headphone driver,combo-jack swap&jack-detection,Google buttons detection,embedded oscillator,flash,tri-color LED PWM driver,Digital EQ,DC-DC converter,etc.,which can fulfill cost-effective,low-power,and versatile USB Type-C Audio accessories in a concise design for Android smartphones,tablets,Teams Headset,New iPad Pro(2018),and PC.It also supports automatic power-down and active modes switch when the 3.5mm headset is unplugged or plugged-in to save the power consumption in USB-C audio adapter/dongle applications.Besides,it has Google headset 4-button in-line control detection and CTIA/OMTP typed headset/headphone auto switch.The integrated digital EQ and tri-color LED driver can bring more differentiation to the USB-C audio accessories.Up-to-96KHz/24bit codec support can facilitate Hi-Res Audio products.

FEATURES

Supports complete power management with auto power-down mode(no 3.5mm headset plug-in)

Ultra-low-power consumption design with internal DC-DC converter(USB5V):0A power-down;18.7mA standby;22mA active playback

Accepts USB 5V or 3.3V power supply

Embedded 8051 MCU with internal 512KB flash

Embedded oscillator for Crystal-less design

True Cap-less/zero-ground headphone driver with patent applied anti-pop technology

Supports OMTP and CTIA 4-ring combo jack auto switch and jack detection

Supports 4 in-line Google buttons headset detection

Built-in 5-band parametric Equalizer for both playback and recording

Integrated Tri-Color LED PWM driver

2-ch DACs w/96dB SNR;1-ch ADC 90dB SNR

Up to 96KHz/24bit Hi-Res playback or recording

Built-in S/PDIF transmitter

USB2.0 Full-Speed and USB Audio Device Class 1.0

CM3271 Small QFN-48 package(5x5 mm)