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Texas Instruments DS1487M — Sensors & Transducers
Texas Instruments

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
DS1487M datasheet
Packaging8-SOIC (0.154", 3.90mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

DS1487M Technical Specifications
ParameterValue
TypeTransceiver
Mounting typeSurface 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 rail and temperature grade

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. Plan the 5 V rail separately if the rest of the board runs 3.3 V. Not rated for -40°C industrial or automotive environments. If the BOM calls for a wider range, the DS1487M is not the fit.

Active production and sourcing posture

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.