Bachmann 36-568A 6 Pin Loco Decoder DCC Chip with Back EMF & Railcom (Suits N). - Fully compatible with the Railcom system. This new chip replaces 36-568, 36-558 and 36-558A. The chip is interchangeable but has a significantly improved low speed response - allowing you to creep your loco around during shunting or station work - rather than the slightly jagged low speed response of the old unit.