MAX3485ESA+T Pin-Compatible
This document provides an objective parameter comparison for reference only in component selection.
1. Pin & Package Specifications
MAX3485ESA+T: SOIC-8 narrow body 3.9mm, complies with industry-standard RS485 pinout definition.
SP3485EN-L/TR: SOIC-8 narrow body 3.9mm, pin arrangement and pad layout fully aligned with standard definitions.
SIT3485ESA: SOIC-8 narrow body 3.9mm, with consistent physical package dimensions and pin assignment specifications.
2. Core Electrical Parameters
Operating Voltage Range
- MAX3485ESA+T: 3.0V～3.6V
- SP3485EN-L/TR: 3.0V～5.5V
- SIT3485ESA: 3.0V～3.6V
Maximum Data Rate
- MAX3485ESA+T: 10Mbps
- SP3485EN-L/TR: 10Mbps
- SIT3485ESA: 12Mbps
Bus Loading Specification
- MAX3485ESA+T: 1/8 unit load, supporting up to 256 communication nodes
- SP3485EN-L/TR: 1/8 unit load, supporting up to 256 communication nodes
- SIT3485ESA: 1/8 unit load, supporting up to 256 communication nodes
ESD Protection (HBM)
All three devices feature a typical ESD rating of ±15kV.
Common Mode Voltage Range
Unified specification for the three models: -7V～+12V.
3. Functional & Hardware Architecture
- Architecture Type: All three are half-duplex RS-485 transceivers with integrated independent transmitter and receiver units.
- Control Logic: Identical voltage-level logic and functional definition for DE and RE direction control pins.
- Bus Protection: Built-in steady-state protection against bus open and short-circuit conditions, ensuring stable output level locking during idle bus status.
- Internal Circuitry: Integrated over-current limiting, thermal shutdown, and bus high-voltage transient suppression circuits with consistent functional architecture.
4. Operating Temperature Range
- MAX3485ESA+T: -40℃ ～ +85℃
- SP3485EN-L/TR: -40℃ ～ +85℃
- SIT3485ESA: -40℃ ～ +85℃
All three devices support standard industrial-grade temperature operating ranges.
5. Reliability & Quality Grade
- MAX3485ESA+T: Industrial-grade general component originally from Maxim (now ADI), RoHS and REACH compliant with long-term stable mass production.
- SP3485EN-L/TR: MaxLinear standardized industrial-grade part with a mature product lifecycle and complete reliability testing for general industrial environments.
- SIT3485ESA: Domestic industrial-grade component that meets basic reliability requirements for industrial control equipment, with complete environmental compliance certifications.
6. Application Compatibility
- MAX3485ESA+T: Optimized for pure 3.3V power supply platforms, widely applied in conventional RS485 communication for industrial controls, testing instruments and building automation systems.
- SP3485EN-L/TR: Compatible with 3.3V/5V mixed-voltage systems, suitable for multi-voltage devices and long-distance outdoor bus communication scenarios.
- SIT3485ESA: Adapted to mainstream 3.3V industrial control architectures, ideal for data transmission in security equipment, IoT terminals and compact automation devices.