The DS1487M is a single-channel half-duplex transceiver for RS-485 and RS-422 networks, built for point-to-point or multi-drop bus topologies. Rated for 2 Mbps signaling, it covers the typical 500 kbps–1 Mbps industrial control bus speed range with margin. The 70 mV receiver hysteresis filters noise on long cable runs — a practical edge for factory-floor RS-485 links.
Supply range is 4.75 V to 5.25 V — strictly 5 V ±5 %. No 3.3 V compatibility; the receiver inputs are not 5 V tolerant on VCC below 4.75 V. Not rated for -40°C industrial or automotive environments. If the BOM calls for a wider range, the DS1487M is not the fit.
Lifecycle status is Active. The part is still in regular production at Texas Instruments, which means it can be quoted against a BOM line without obsolescence risk. RoHS compliance is listed as non-compliant. If your assembly requires RoHS-10 (EU 2015/863), confirm the solder alloy and reflow profile — the DS1487M may contain lead in the terminations. Sourced per RFQ against the line-item quantity.
Pinout and termination
The DS1487M pinout follows the standard 8-SOIC RS-485 transceiver footprint: RO (pin 1), RE (pin 2), DE (pin 3), DI (pin 4), GND (pin 5), A (pin 6), B (pin 7), VCC (pin 8). This matches the SN75176 and other 8-pin half-duplex RS-485 parts — drop-in compatible for a board already routed for that footprint. Termination resistors: for RS-485, a 120 Ω resistor across A and B at each end of the bus is standard practice. The DS1487M does not include on-chip termination; it must be added externally.