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Analog Devices MAX491EEPD+ — DC-DC Power Modules
Analog Devices

MAX491EEPD+ RS-422/RS-485 Transceiver, Full Duplex, 2.5 Mbps

MPNMAX491EEPD+
End of Life

Maxim Integrated MAX491EEPD+, RS-422/RS-485 transceiver, full duplex, 1/1 driver/receiver, 2.5 Mbps data rate, 4.75V–5.25V supply, 14-PDIP, -40°C to 85°C.

$9.16Ref. price · indicative, final on quote
MAX491EEPD+ datasheet
Packaging14-DIP (0.300", 7.62mm)
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

MAX491EEPD+ Technical Specifications
ParameterValue
TypeTransceiver
Mounting typeThrough Hole
Voltage4.75V ~ 5.25V
ProtocolRS422, RS485
Operating temperature-40°C ~ 85°C
DuplexFull
PackageTube
Data rate2.5Mbps
Case14-DIP (0.300\", 7.62mm)
Receiver hysteresis70 mV
Number of drivers (Receivers)1/1

Product details

Full duplex vs half duplex — the bus topology decision

The full-duplex capability with separate driver and receiver pairs supports simultaneous transmit and receive on a four-wire RS-422 bus or a four-wire RS-485 network.

Package and mounting — MRO and panel fit

The 14-DIP (0.300", 7.62 mm) through-hole package is socket-friendly and easy to hand-replace in the field — a real advantage for MRO spares on existing PLC I/O cards or serial interface boards. No fine-pitch soldering, no reflow profile to worry about. The PDIP footprint also gives good mechanical retention in high-vibration industrial environments when socketed with a dual-wipe contact.

Frequently asked questions

Can MAX491EEPD+ be used for full-duplex RS-422?

Yes. The MAX491EEPD+ is a full-duplex transceiver with one driver and one receiver, supporting both RS-422 and RS-485 protocols. For RS-422, connect the driver outputs to the transmit pair and the receiver inputs to the receive pair — no direction control needed.

What is the difference between MAX491EEPD+ and MAX485?

The MAX485 is a half-duplex RS-485 transceiver (one driver/receiver pair sharing a single bus), while the MAX491EEPD+ is full-duplex (separate driver and receiver pairs). The MAX491EEPD+ also includes 70 mV receiver hysteresis for improved noise margin on long cables.