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Analog Devices MAX491ECSD+ — DC-DC Power Modules
Analog Devices

MAX491ECSD+ RS-485/RS-422 Transceiver, Full Duplex, 2.5 Mbps

MPNMAX491ECSD+
End of Life

Maxim Integrated MAX491ECSD+, RS-422/RS-485 Transceiver, Full Duplex, 1/1 Drivers/Receivers, 2.5 Mbps, 4.75V–5.25V Supply, 0°C to 70°C, 14-SOIC.

$5.67Ref. price · indicative, final on quote
MAX491ECSD+ datasheet
Packaging14-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

MAX491ECSD+ Technical Specifications
ParameterValue
TypeTransceiver
Mounting typeSurface Mount
Voltage4.75V ~ 5.25V
ProtocolRS422, RS485
Operating temperature0°C ~ 70°C
DuplexFull
PackageTube
Data rate2.5Mbps
Case14-SOIC (0.154\", 3.90mm Width)
Receiver hysteresis70 mV
Number of drivers (Receivers)1/1

Product details

Part identity and function

The Maxim Integrated MAX491ECSD+ is a full-duplex transceiver in a 14-SOIC surface-mount package. It integrates one driver and one receiver, operates from a 4.75 V to 5.25 V supply, and is rated for 0°C to 70°C. The 70 mV receiver hysteresis improves noise margin, and the 2.5 Mbps data rate supports most industrial serial links.

2.5 Mbps and full duplex — what they mean for the bus

Full duplex means the MAX491 can transmit and receive simultaneously over a four-wire RS-422 bus (or a two-pair RS-485 network with separate enable control). The 2.5 Mbps data rate is typical for building-automation gateways, PLC-to-drive links, and multi-drop sensor networks where the cable run stays under about 400 m. At this speed the driver slew rate is fast enough that stub lengths on the bus should be kept under 30 cm to avoid reflections.

Lifecycle and supply posture

The MAX491ECSD+ carries an Active product status and is ROHS3 compliant.

Frequently asked questions

What is the data rate of MAX491ECSD+?

The MAX491ECSD+ supports a data rate of 2.5 Mbps. This is the maximum rate under the specified supply and load conditions.

Does MAX491ECSD+ support full duplex?

Yes, the MAX491ECSD+ is a full-duplex transceiver. It can transmit and receive simultaneously, which is typical for RS-422 point-to-point links or four-wire RS-485 networks.