MAX3161EEAG+T

Overview

The MAX3161EEAG+T is a multiprotocol transceiver from the MAX3160E/MAX3161E/MAX3162E family, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +3.0V to +5.5V supply and features ±15kV ESD protection per the Human Body Model. The device supports RS-232, RS-485, and RS-422 protocols via pin-programmable configuration. It includes an integrated dual charge pump for RS-232 voltage generation without requiring bipolar supplies. The component provides selectable transmitter slew rates, enabling data transmission up to 250kbps with slew-rate limiting or up to 10Mbps in RS-485/RS-422 mode and 1Mbps in RS-232 mode. It is housed in a 24-pin SSOP package and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Pin-programmable flexibility allows configuration as either a 2Tx/2Rx RS-232 interface or a single RS-485/RS-422 transceiver.
• Integrated dual charge pump circuitry eliminates the need for external bipolar ±12V power supplies.
• Enhanced electrostatic discharge protection ensures robustness against ±15kV human body model events.
• Slew-rate limiting minimizes electromagnetic interference and reduces cable reflections during data transmission.

Applications

• Point-of-Sales Equipment
• Industrial Controls
• RS-232 to RS-485 Interface Converters

Procurement Notes

Verify the specific ordering suffix 'T' indicates tape-and-reel packaging when sourcing this component. Confirm that the 'E' designation corresponds to the extended industrial temperature range of -40°C to +85°C. Ensure compatibility with the 24-pin SSOP footprint during procurement planning. Cross-reference the manufacturer's latest documentation to confirm current production status and availability constraints.

Selection Notes

Select the MAX3161EEAG+T when a design requires pin-selectable operation between RS-232 and RS-485/RS-422 modes using shared digital I/O ports. This part is suitable for applications needing separate physical interfaces for each protocol while sharing logic control lines. Consider the 24-pin SSOP package size for space-constrained layouts. Verify that the required data rates and ESD protection levels align with the system's operational environment.

Part Context

The MAX3161E belongs to a family of low-power, multiprotocol transceivers designed for flexible serial communication interfaces. Unlike the MAX3160E which shares I/O ports completely, the MAX3161E offers separate transmitter and receiver outputs for RS-232 and RS-485/RS-422 while maintaining common digital inputs. This architecture facilitates multiplexing a single UART across two distinct interface buses efficiently.

Replacement Considerations

MAX3160EEAG+T

FAQ

How does the FAST input affect data transmission rates?

Asserting the FAST input disables slew-rate limiting, allowing data rates up to 10Mbps in RS-485/RS-422 mode and 1Mbps in RS-232 mode. Deasserting it limits the slew rate to reduce EMI, supporting error-free transmission up to 250kbps.

What is the function of the HDPLX pin?

The HDPLX pin selects the operating mode for RS-485/RS-422. Driving it high places the device in half-duplex mode, internally connecting receiver inputs to driver outputs. Driving it low enables full-duplex operation.

How is power consumption managed in standby conditions?

Driving the SHDN pin low shuts down the charge pump and transmitters, reducing the supply current to 10nA. The RS-232 receivers remain active in this state if the device is configured for RS-232 operation.