MAX3050ASA+

Overview

The MAX3050ASA+ is a high-speed CAN transceiver manufactured by Analog Devices Inc./Maxim Integrated, designed for systems requiring data rates up to 2Mbps. It features ±80V fault protection against shorts in high-voltage power buses and operates from a single +5V supply with a voltage range of 4.5V to 5.5V. The device supports four modes: high speed, slope control, standby, and shutdown. It includes an AutoShutdown function that activates after 4ms of inactivity. The component is housed in an 8-pin SO package and is specified for operation across a temperature range of -40°C to +125°C.

Feature Summary

• ±80V Fault Protection
• Four Operating Modes
• AutoShutdown Function
• Automatic Wake-Up

Applications

• HVAC Controls
• Telecom 72V Systems

Procurement Notes

Verify the specific ordering suffix to confirm RoHS compliance status, as indicated by the datasheet. Ensure the selected variant matches the required operating temperature range and package type for your application. Cross-reference the manufacturer's part number with official distributor catalogs to confirm current availability and authenticity before finalizing procurement.

Selection Notes

Select the MAX3050ASA+ when ±80V fault protection is required for high-voltage bus environments. Choose this component over the MAX3057 if automatic shutdown capabilities are needed to manage power consumption during inactive periods. Ensure the system design accommodates the 8-pin SO package dimensions and thermal dissipation requirements within the specified operating temperature range.

Part Context

The MAX3050ASA+ belongs to the MAX3050/MAX3057 family of CAN transceivers. It shares core specifications with the MAX3057 but adds the AutoShutdown feature. Both variants offer identical fault protection and data rate capabilities. The 'A' suffix denotes the extended industrial temperature range, while the '+' indicates RoHS compliance.

Replacement Considerations

The MAX3057ASA+ is a direct functional substitute lacking the AutoShutdown feature. Verify if the automatic shutdown capability is critical for the target application before swapping components. Other pin-compatible alternatives may exist but require careful evaluation of electrical characteristics and fault protection ratings.

FAQ

How does the AutoShutdown feature work?

The AutoShutdown function puts the device into a 15ms shutdown mode when the bus or CAN controller is inactive for 4ms or longer. An external capacitor connected to the SHDN pin determines the threshold time period.

What is the purpose of the RS pin?

The RS pin selects the operating mode. Driving it low enables high-speed operation, connecting it to ground via a resistor enables slope-control mode, and driving it high enables standby mode.

How is EMI reduced in this transceiver?

EMI is reduced by using the slope-control mode, which limits the slew rate of the CANH and CANL outputs. This minimizes electromagnetic interference and allows the use of unshielded twisted pair cables.