This part is a kind of semiconductor called 26LS31.
Function of this product has QUADEIA.422LINEDRIVERWITHTHREE.STATEOUTPUTS.
Manufacturers : Motorola Inc
Image and pinout :
Some of the text within the PDF file :
Order this document by AM26LS31/D Quad Line Driver with NAND Enabled Three-State Outputs The Motorola AM26LS31 is a quad differential line driver intended for digital data transmission over balanced lines. It meets all the requirements of EIA–422 Standard and Federal Standard 1020. The AM26LS31 provides an enable/disable function common to all four drivers as opposed to the split enables on the MC3487 EIA–422 driver. The high impedance output state is assured during power down. • Full EIA–422 Standard Compliance AM26LS31 QUAD EIA–422 LINE DRIVER WITH THREE–STATE OUTPUTS SEMICONDUCTOR TECHNICAL DATA • • • • • • • Single + 5.0 V Supply Meets Full VO = 6.0 V, VCC = 0 V, IO Output Short Circuit Protection t 100 µA Requirement D SUFFIX PLASTIC PACKAGE CASE 751B [ ... ]