This part is a kind of semiconductor called IS1681S.

Function of this product has IS1681S.

Manufacturers : Chenbing

Image and pinout :

Some of the text within the PDF file :

--- - -C---a-o--’RT--e-l-:--1-3--5-9--0--4-6--0-2--1-9Q---Q--:--1-6--1-7--1-5--3--5-2--3 - 四、模块尺寸图： 五、模块脚位定义图 - 六、引脚功能说明 PIN NAME 1 P04 2 P30 3 MFB 4 VOL+ 5 VOL6 DOWN 7 UP 8 PLAY/PAUSE 9 1V8 10 GND 11 VBAT1 12 LED1 13 LED2 14 ADAP 15 AOUTL 16 AGND 17 AOUTR 18 AINL 19 AINR 20 P00 21 TX 22 RX 23 MUTE 24 P20 25 P03 26 P01 27 MICP 28 MICN 29 MIC BIASI TYPE Digital Digital Digit [ ... ]

IS1681S PDF Datasheet Download