This part is a kind of semiconductor called TM1638.

Function of this product has LED drivers control.

Manufacturers : Titan Micro

Image and pinout :

Some of the text within the PDF file :

1 2 3 4 5 6 7 8 9 10 11 12 13 14 K1 K2 TM1638 K3 VDD SEG1/KS1 SEG2/KS2 SEG3/KS3 SEG4/KS4 SEG5/KS5 SEG6/KS6 SEG7/KS7 SEG8/KS8 SEG9 SEG10 STB CLK DIO GND GR1 GR2 GR3 GR4 GR5 GR6 GND GR7 GR8 VDD 28 27 26 25 24 23 22 21 20 19 18 17 16 15 www.titanmec.com -1- VCC 10K DIO CT GND www.titanmec.com -2- / LED K KS K1 www.titanmec.com -3- K2 K3 KS1 KS2 KS3 KS4 KS5 KS6 KS7 KS8 BYTE1 BYTE4 BIT 1 4 www.titanmec.com -4- www.titanmec.com -5- CLK DIO STB 1 B0 2 B1 3 B2 4 B3 5 B4 6 B5 7 B6 8 B7 CLK DIO STB 1 B0 2 B1 `` [ ... ]

TM1638 PDF Datasheet Download