The 74F8965 and 74F8966 are 9bit bidirectional latchable transceivers and are intended to provide the electrical interface to a high performance wiredOR bus. The B port inverting drivers are lowcapacitance open collector with controlled ramp and are designed to sink 100mA from 2 volts. The B port inverting receivers have a precision band gap references for improved noise margins. The B port interfaces to 'Backplane Transceiver Logic' (BTL). BTL features a reduced (1V to 2V) voltage swing for lower power consumption and a series diode on the drivers to reduce capacitive loading. Incident wave switching is employed, therefore BTL propagation delays are short. Although the voltage swing is much less for BTL, so is its receiver threshold region, therefore noise margins are excellent.