This part is a kind of semiconductor called BD429A.

Function of this product has Line Driver.

Manufacturers : DEI

Image and pinout :

Some of the text within the PDF file :

Device Engineering Incorporated 385 E. Alamo Drive Chandler, AZ 85225 Phone: (480) 303-0822 Fax: (480) 303-0824 E-mail: admin@deiaz.com BD429/BD429A/BD429B/BD429C ARINC 429/RS-422 Line Driver Integrated Circuit Features: • • • • • • • • • • • • ARINC 429 Line Driver for HI speed (100 kHz) and LOW speed (12.5 kHz) data rates Pin for Pin replacement part for industry standard ARINC 429 Line Drivers Available in a 16 Pin SOIC (WB), 16 Pin CERDIP, 16 Pin Plastic Dip, 16 Lead Ceramic SOP, 28L CLCC and 28L PLCC Low EMI RS-422 line driver mode for data rates up to 100 kHz Adjustable slew rates via two external capacitors Inputs are TTL and CMOS compatible Low quiescent power of 125mW (typical) Programmable output differential range via VREF pin Outp [ ... ]

BD429A PDF Datasheet Download