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MAX485ESA+T

RS-485/RS-422 half-duplex transceiver, 2.5Mbps, ±15kV ESD, 32 nodes, SOIC-8

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Manufacturer Part：

MAX485ESA+T

Package：

SOIC-8 / NSOIC-8 (3.9 x 4.9 x 1.25mm)

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Description

Product Overview

The MAX485ESA+T from Analog Devices (Maxim Integrated) is a low-power, slew-rate-unlimited RS-485/RS-422 transceiver in an SOIC-8 package. It contains one driver and one receiver for half-duplex communication at up to 2.5Mbps, with ±15kV ESD protection on the bus pins, thermal shutdown, and short-circuit current limiting.

Key Specifications

Interface RS-485 / RS-422
Duplex Half-Duplex
Number of Drivers/Receivers 1 / 1
Data Rate 2.5Mbps
Supply Voltage 4.75V to 5.25V (5V nominal)
Quiescent Current 300μA to 500μA
Shutdown Current 0.1μA (MAX481/483/487)
Number of Nodes 32 (1/8 unit load)
Receiver Input Resistance 96kΩ (1/8 unit load)
Differential Output Voltage 1.5V min (RL=54Ω)
ESD Protection ±15kV HBM (bus pins)
Bus Fault Tolerance ±15V on A/B pins
Package SOIC-8 (3.9 x 4.9mm)
Operating Temperature -40°C to +85°C

Features

  • 2.5Mbps data rate (unlimited slew rate)
  • Half-duplex operation with driver and receiver enable
  • Low quiescent current: 300μA to 500μA
  • ±15kV ESD protection on bus pins
  • Short-circuit current limited driver output
  • Thermal shutdown protection
  • Receiver fail-safe for open-circuit input
  • 1/8 unit load: up to 32 transceivers on the bus
  • Single 5V supply
  • Driver and receiver independently enabled

Applications

  • Industrial control local area networks
  • Low-power RS-485 transceivers
  • Level translators
  • EMI-sensitive applications
  • RS-422 communication links

The MAX485ESA+T from Analog Devices (Maxim Integrated) is a low-power RS-485/RS-422 transceiver containing one driver and one receiver in a compact SOIC-8 package. With an unlimited slew rate driver, it supports data rates up to 2.5Mbps for half-duplex communication. The driver output features short-circuit current limiting and thermal shutdown protection, while the receiver includes a fail-safe feature guaranteeing a logic-high output when the input is open-circuit. The device supports up to 32 transceivers on a single bus with 1/8 unit load input impedance.

The MAX485ESA+T integrates a differential driver and a differential receiver with independent enable controls (DE for driver, /RE for receiver). The driver converts single-ended TTL/CMOS logic to differential RS-485 signals on the A and B bus pins. The receiver converts the differential bus signal back to single-ended logic on the RO pin. In half-duplex mode, only the driver or receiver is active at a time, controlled by DE and /RE pins. When both are disabled, the device enters a low-power shutdown mode. The fail-safe receiver ensures a defined high output state when the bus is idle or floating.

Pin Name Type Function
1 RO Output Receiver output
2 /RE Input Receiver output enable (active low)
3 DE Input Driver output enable (active high)
4 DI Input Driver data input
5 GND Power Ground
6 A I/O Non-inverting receiver input / driver output
7 B I/O Inverting receiver input / driver output
8 VCC Power Supply voltage (5V)
  • Industrial RS-485 network transceivers for Modbus/Profibus
  • Low-power RS-422 point-to-point communication links
  • Level translation between TTL logic and RS-485 bus
  • EMI-sensitive long-distance data transmission
  • Building automation and HVAC bus communication
Manufacturer Part Number Package Notes
ADI/Maxim MAX485CSA+T SOIC-8 Non-ESD version, same function
TI SN65HVD75DR SOIC-8 3.3V/5V RS-485, 12Mbps
TI SP3485EN-L/TR SOIC-8 3.3V low-power RS-485
Renesas ISL83485IBZ SOIC-8 3.3V/5V RS-485 transceiver
onsemi AM26LV32IDR SOIC-8 RS-422 quad receiver
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All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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