 SN75176B
is a general purpose bus transceiver with 50mV typically hysteresis comparator input.It looks like suitable for IEBus, but the result by a person is not reported.μPD78P098A
is an 8-bit single-chip microcontroller with on-chip 60K bytes UV-EPROM, 2K bytes RAM, and IEBus controller, which supports mode 0, 1, and 2, with full data link layer protocol support.