MAX3485AEASA+ Maxim Integrated Undefined or Miscellaneous (Small Outline Packages) In Stock
Maxim MAX3485AEASA+ is a 3.3 V RS-485/RS-422 half-duplex line transceiver in an 8-pin SOIC package with differential Schmitt trigger receiver inputs and one driver plus one receiver channel. It supports data rates up to 10 Mbps over twisted-pair cables in industrial communication networks. Available globally from authorized distributors with fast worldwide shipping.
- Manufacturer
- Maxim Integrated
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MAX3485AEASA+ Datasheet PDF
- Category
- Undefined or Miscellaneous
- Price
- From $0.7601(MOQ 100)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 3.3 V single-supply operation enabling direct interface with low-voltage microcontrollers and FPGAs without level translation
- Differential Schmitt trigger receiver inputs reject common-mode noise up to ±7 V for robust communication in noisy industrial environments
- 10 Mbps maximum data rate over RS-485/RS-422 differential bus supporting high-speed serial communication across multi-node networks
- 8-pin SOIC package provides compact PCB integration suitable for space-constrained industrial control boards
- EIA-422 and EIA-485 dual-standard compliance allows use in both point-to-point and multi-drop bus topologies up to 32 unit loads
Applications
The MAX3485AEASA+ is widely used in industrial automation networks, PLC communications, and SCADA systems requiring robust RS-485 serial links over long cable runs. Its 3.3 V operation and differential signaling make it ideal for interfacing microcontrollers in building automation, motor drive parameter programming, and field instrument communication over Modbus or DMX512 protocols. The device also suits RS-422 point-to-point links in medical devices, test equipment, and multi-drop sensor networks where noise immunity and cable length are critical.
Specifications
| Manufacturer Package Code | 8-SOIC_N-150_MIL |
| Date Of Intro | 2016-09-19 |
| YTEOL | 9 |
| Differential Output | YES |
| Driver Number of Bits | 1 |
| High Level Input Current-Max | 0.000002A |
| Input Characteristics | DIFFERENTIAL SCHMITT TRIGGER |
| Interface IC Type | LINE TRANSCEIVER |
| Interface Standard | EIA-422; TIA-422; EIA-485; TIA-485 |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Out Swing-Min | 1.5V |
| Output Low Current-Max | 0.002A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Receive Delay-Max | 35ns |
| Receiver Number of Bits | 1 |
| Supply Current-Max | 4mA |
| Supply Voltage-Max | 3.6V |
| Supply Voltage-Min | 3V |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Technology | BICMOS |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Transmit Delay-Max | 30ns |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Japan, Mainland China, Malaysia, Philippines, Singapore, South Korea, Taiwan, Thailand, USA |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum data rate and supply voltage for the MAX3485AEASA+?
The MAX3485AEASA+ operates from a 3.3 V supply and supports RS-485/RS-422 data rates up to 10 Mbps. This combination makes it suitable for high-speed Modbus RTU, DMX512, and proprietary serial protocols over twisted-pair cables. At lower data rates such as 9600 baud, the device can reliably drive cable runs exceeding 1200 meters while maintaining signal integrity.
How does the differential Schmitt trigger receiver in MAX3485AEASA+ benefit noise immunity in industrial installations?
The differential Schmitt trigger receiver has hysteresis and rejects common-mode voltages from -7 V to +12 V, which is the typical noise range on industrial RS-485 bus wiring. Ground potential differences between equipment in large factories can easily exceed 1 V, and differential reception cancels this common-mode interference. The Schmitt trigger hysteresis additionally prevents false triggering from slow-rising edges caused by long cable capacitance.
Can MAX3485AEASA+ drive multiple nodes on an RS-485 bus, and what is the maximum node count?
Yes, the MAX3485AEASA+ presents 1 unit load to the RS-485 bus, allowing up to 32 standard unit-load devices on a single bus segment without active repeaters. In a typical Modbus RTU network with a 120-ohm termination resistor at each end of the bus, this supports 32 slave nodes per segment. Using low-unit-load receivers (1/8 or 1/4 unit load) can extend the node count to 128 or 256 devices per segment.
When should a designer choose MAX3485AEASA+ over MAX485EESA+ for an RS-485 design?
The MAX3485AEASA+ is the 3.3 V variant designed for modern low-voltage microcontroller systems, whereas the MAX485EESA+ requires a 5 V supply. A designer should select MAX3485AEASA+ when the host controller runs at 3.3 V IO levels to avoid the need for level-shifting circuitry, reducing component count and board space. Both devices offer the same 10 Mbps data rate and 8-pin SOIC package, so substitution is straightforward with only a supply voltage change.
Related Guides
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
ADAQ7768-1 Design Guide for Precision Vibration and Dynamic Signal Measurement
Design ADAQ7768-1 precision data acquisition channels for vibration and dynamic sensing with the right bandwidth, reference, clock, and layout choices.
Jun 30, 2026
AD5204BRZ10 Design Guide for SPI-Controlled Gain and Offset Calibration
Design AD5204BRZ10 digital potentiometer calibration loops with bounded trim span, safe wiper current, clean SPI routing, and reliable startup codes.
Jun 30, 2026
Why Buy from FindMyChip
About Maxim Integrated
Maxim Integrated is a leading electronic component manufacturer. FindMyChip sources Maxim Integrated ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 100+ | $4.7500 | $475.00 |
| 230+ | $0.8770 | $201.71 |
| 295+ | $0.8478 | $250.10 |
| 395+ | $0.7601 | $300.24 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”