10 Mbps quad receiver — the data-rate ceiling and the bus margin
The MAX3093ECUE+ is a quad RS-422/RS-485 receiver from Analog Devices, packing four receivers into a 16-TSSOP package. The 10 Mbps data rate covers the common industrial bus speeds — Profibus at 12 Mbps is tight, but Modbus RTU at 115.2 kbps, DMX512 at 250 kbps, and most PLC backplane links at 1-5 Mbps run well within margin. The 45 mV receiver hysteresis filters out noise on long cable runs — a 100-metre RS-485 stub with a floating ground can see 20-30 mV of common-mode hash, and the hysteresis prevents the output from chattering between logic states. Below 45 mV of differential noise the receiver holds its last valid state.
A 5 V rail that dips to 4.5 V under load — common with a 7805 regulator feeding a mixed-signal board — will drop the receiver out of spec. With 0 drivers and 4 receivers, this is a receive-only device — no transmitter on chip. It pairs with a separate RS-485 transceiver (like the MAX3082 or SN65HVD3082) for half-duplex or full-duplex links.
Active lifecycle and compliance posture
No official cross-reference or second-source is recorded — the pinout and function are proprietary to the MAX3093E family.