Overview
| Information | RS-485 Transceiver with Extended IEC ESD and EFT Protection |
|---|---|
| Supported Protocols | RS-485, RS-422 |
| Supply Voltage (Nom) (V) | 3.3, 5 |
| No. of Tx | 1 |
| No. of Rx | 1 |
| Duplex | Half |
| Data Rate (MAX) (Mbps) | 0.25 |
| EFT (±kV) | 2 |
| HBM ESD (kV) | 15 |
| IEC 61000-4-2 Contact (±kV) | 12 |
| Rx Fail-Safe | Advanced |
| Multi-Drop Nodes | 256 |
| Transient Tolerance (V) | - |
| Fault Tolerance (V) | -15 to 15 |
| VL Pin | - |
| Temperature Range (°C) | -40 to 125 |
| Package | NSOIC-8 |
| ICC (Max) (mA) | 1.5 |
| Shutdown | ✔ |
| Typ Shutdown Current (µA) | 0.1 |
| Hot Swap | ✔ |
| PROFIBUS (5V) or High Output (3V) | ✔ |
The MxL83121 and MxL83122 (MxL8312x family) of half-duplex RS-485 transceivers support up to 500kbps communication in harsh industrial environments. The bus pins tolerate high levels of IEC electrical fast transients (EFT), IEC electrostatic discharge (ESD), and provide an extended common mode range.
Two product options with slew controlled 250kbps and 500kbps speeds are specifically designed to excel at long-distance communication. The combination of integrated EFT and ESD protection, wide common mode, and low slew rate provide a high degree of protection, immunity to noise, and ultra-low EMI.
High receiver input impedance allows 256 transceivers to share a common data bus while maintaining signal margin and without excessive loading or use of expensive repeaters. Enhanced failsafe circuitry ensures receivers provide the expected output when the bus is shorted or left open under both terminated and unterminated conditions. Drivers include built-in short-circuit protection and a thermal-overload shutdown to protect against excessive power dissipation from bus contention.
- Meets or exceeds the requirements of the TIA/EIA-485A standard
- Low slew-rate drivers for reliable long-distance communication
- Differential output exceeds 2.1V for PROFIBUS compatibility with a 5V supply
- Wide supply range from 3.0 to 5.5V
- Extended operating temperature range from –40°C to 125°C
- Extended operational common-mode range of ±12V
- Low-power shutdown mode
- Enhanced failsafe protection for open, short, idle
- Glitch-free power-up/down hot plug capability
- 1/8 unit load (256 bus nodes)
- Drop-in compatible NSOIC package
- Robust system protection
- ±2kV EFT (IEC 61000-4-4)
- ±12kV ESD Contact (IEC 61000-4-2)
- ±15kV ESD Human Body Model
- Motor drives
- HVAC systems
- Industrial and single-board computers
- Smart Grid
- Building security and automation
- Industrial and process control equipment
- Industrial transport
Documentation & Design Tools
| Type | Title | Version | Date | File Size |
|---|---|---|---|---|
| Data Sheets | RS-485/422 Transceivers with Extended IEC ESD and EFT Protection | R00 | August 2024 | 1.1 MB |
| Application Notes | RS-485 Transceivers in Fieldbus Networks | R00 | October 2024 | 2.4 MB |
| Application Notes | Electric Fast Transient (EFT) Application Note | R00 | September 2024 | 2.5 MB |
| Product Flyers | MxL83121, MxL83122 Half-Duplex RS-485 Flyer | R02 | November 2024 | 960.7 KB |
| Product Brochures | Interface Brochure | R02 | November 2024 | 3.6 MB |
Quality & RoHS
Parts & Purchasing
| Part Number | Pkg Code | Min Temp | Max Temp | Status | Buy Now | Order Samples |
|---|---|---|---|---|---|---|
| MXL83121E-ADA-R | NSOIC8 | -40 | 125 | Active | Order |
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Packaging
| Pkg Code | Details | Quantities | Dimensions |
|---|---|---|---|
| NSOIC8 |
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