This part is a kind of semiconductor called TM1620.

Function of this product has LED drive control circuit dedicated.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

• • • • • • • -1- VCC 10K DIO CT GND -2- LED -3- -4- CLK DIO STB 1 B0 2 B1 3 B2 4 B3 5 B4 6 B5 7 B6 8 B7 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 1 1 1 1 1 1 1 GRID1 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 A DPY a B C f g b D c Ee d F G [LEDgn] GRID1 -5- CL K D IO STB Command1 Command2 Command3 D ata1 D ata2 ``````` D ata n Command4 CL K D IO STB Command1 Command2 Command3 D ata1 Command4 D ata2 ``````` Command5 -6- No 14BYTE 00H Yes 1 40H 8FH 0C0H -7- 0C1H 1BYTE 00H …… 44H 0C0H 8FH 1BYTE -8- SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 led1 DPY a a b c f b g d e e c d f dp g dp led4 DPY a a b c f b g d e e c d f dp g dp GRID1 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 led2 DPY a a b c f b g d e e c d f dp g dp led5 DPY a a b c f b g d e e c d [ ... ]

TM1620 PDF Datasheet Download