View lm-1256 datasheet:

LED displays 16 16 matrix displays LM-1256 Series The LM-1256 series are 16 16 matrix FExternal dimensions (Units: mm) displays which can be used in a wide variety of applications, including alpha- bet, numeric, symbol, and graphic dis- plays. Bright red and red are available, as well as a dual-color red/green type. FApplications Light sources for displays FFeatures 1) 16 16 dot matrix Circular emitters. 2) External dimensions: 32 32 5.4 mm 3) Emitters: Circular, 1.6 mm diameter 4) Black package. FSelection guide 247 LED displays LM-1256 Series FPin assignments FInternal circuit schematic FPin assignment table Single-color type (LB) Single-color type (VB) 248 LED displays LM-1256 Series FDual-color type FAbsolute maximum ratings (Ta = 25_C) FSingle-color typ