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Texas Instruments DS1487M — Sensors & Transducers

DS1487M – Texas Instruments Half-Duplex RS-485/RS-422

MPNDS1487M
End of Life

Texas Instruments DS1487M, half-duplex RS-485/RS-422 transceiver, 1/1 driver/receiver, 2 Mbps data rate, 4.75V–5.25V supply, 70 mV receiver hysteresis, 0°C–70°C, 8-SOIC surface-mount package.

$1.34Ref. price · indicative, final on quote
Texas Instruments DS1487M datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSRoHS non-compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DS1487M specifications
ParameterValue
TypeTransceiver
MountingSurface Mount
Voltage4.75V ~ 5.25V
ProtocolRS422, RS485
Operating temperature0°C ~ 70°C
DuplexHalf
PackageBulk
Data rate2Mbps
Case8-SOIC (0.154\", 3.90mm Width)
Receiver hysteresis70 mV
Number of drivers (Receivers)1/1

Product details

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.

Frequently asked questions

What is the closest pin-compatible alternative to DS1487M in this family?

The SN75176 is a common pin-compatible half-duplex RS-485 transceiver in the same 8-SOIC footprint. The DS1487M offers 70 mV receiver hysteresis versus the SN75176's 50 mV typical — a small noise-margin advantage on longer bus runs. Both operate on 5 V and switch at 2 Mbps. Confirm the exact supply tolerance and temperature grade against your BOM before swapping.

Is DS1487M compatible with 3.3 V logic?

No. The supply voltage range is 4.75 V to 5.25 V. The logic inputs (DI, DE, RE) and receiver output (RO) are 5 V levels. Driving them from a 3.3 V MCU without level translation risks undervoltage on the bus and may not meet the input threshold. Use a 5 V-tolerant MCU or add a level shifter.