General Description

The MAX33047E-49E are a full-duplex RS-485/422

transceiver family that operates at either 3.3V or 5V

supply rails for ease of design. These devices provide

enhanced protection for the applications used in harsh

electrical environments. All driver outputs and receiver

inputs are protected with both high fault protection and

high electrostatic discharge (ESD) protection.

The A/B data lines have fault protection up to ±25V for

accidental shorts with local power supplies and ±40kV

ESD human body model (HBM) protection. They are

also rated up to ±15kV Air-Gap Discharge and ±10kV

Contact Discharge as per IEC 610004-2. Both features

ensure robust protection in harsh industrial

environments. The drivers are short-circuit limited and

protected against excessive power dissipation by the

thermal-shutdown circuitry that places the driver outputs

into a high-impedance state. The receiver input has a

true fail-safe feature that guarantees a logic-high output

if both the inputs are open or short-circuited.

These devices are encased in an 8-pin and 14-pin small

outline integrated circuit (SOIC) package with an

operating temperature from -40°C to +125°C.

Benefits and Features

• Integrated Protection Increase Robustness

• ±25V Fault Protection Range on Driver

Outputs/Receiver Inputs

• High ESD Protection

- ±40kV HBM ESD as per JEDEC JS-001

- ±15kV Air Gap ESD as per IEC 61000-4-2

- ±10kV Contact ESD as per IEC 61000-4-2

• Short-Circuit Protected Outputs

• True Fail-Safe Receiver Prevents False

Transition on Receiver Input Short or Open

Events

• Hot-Swap Capability Eliminates False Transitions

During Power-Up or Hot Insertion

• High-Speed Data Rates up to 20Mbps

• Wide -40°C to +125°C Operating Temperature

• Enables Up to 256 Nodes on the Bus

Applications

• Programmable Logic Controller (PLC)

• Factory Automation Equipment

• Industrial