MAX3160EEAP+

Overview

The MAX3160EEAP+T is a multiprotocol transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 20-pin SSOP package. It supports RS-232, RS-485, and RS-422 interfaces with a supply voltage range of +3.0V to +5.5V. The device features ±15kV ESD protection on all transmitter outputs and receiver inputs. It operates within an extended temperature range of -40°C to +85°C. Key electrical parameters include a maximum data rate of 250kbps in slew-rate limited mode, up to 1Mbps for RS-232 and 10Mbps for RS-485/RS-422 when slew-rate limiting is disabled. Shutdown current is typically 1µA.

Feature Summary

• Pin-programmable configuration allows operation as either a 2Tx/2Rx RS-232 interface or a single RS-485/RS-422 transceiver.
• Integrated dual charge pump circuitry enables compliant RS-232 and RS-485/RS-422 performance using only a single positive supply voltage.
• Transmitter slew rates are pin-selectable to minimize electromagnetic interference (EMI) and reduce cable reflections during high-speed data transmission.
• Robust protection mechanisms include true fail-safe receivers, short-circuit protection across the entire common-mode voltage range, and thermal shutdown capabilities.

Applications

• Point-of-Sales Equipment
• Industrial Controls
• Networking Interface Converters

Procurement Notes

Verify the component authenticity by checking the manufacturer marking against official datasheet specifications. Confirm the package type matches the required SSOP-20 footprint and ensure the temperature grade corresponds to the 'E' suffix for extended industrial ranges. Cross-reference the ordering information table to validate the specific part number variant before finalizing procurement.

Selection Notes

Select this component when designing systems requiring flexible protocol conversion between RS-232 and RS-485/RS-422 standards. The flow-through pinout facilitates efficient board layout for space-constrained designs. Ensure the application environment requires the specified extended temperature range and that the single-supply architecture aligns with the system's power distribution constraints.

Part Context

This device belongs to the MAX3160E/MAX3161E/MAX3162E family of multiprotocol transceivers. While the MAX3160E shares I/O ports between protocols, other family members like the MAX3161E and MAX3162E offer separate I/O configurations for simultaneous multi-protocol operations. This specific part represents the standard 20-pin SSOP implementation optimized for multiprotocol bus applications.

Replacement Considerations

Direct functional substitutes within the same family include the MAX3161EAP+ and MAX3162EAI+. Note that these alternatives utilize different pin counts (24-pin and 28-pin SSOP respectively) and distinct pinout configurations, necessitating careful review of schematic compatibility and PCB layout adjustments.

FAQ

How does the FAST input affect data transmission?

The FAST input controls the transmitter slew rate. When asserted, it disables slew-rate limiting, allowing higher data rates up to 10Mbps for RS-485/RS-422 and 1Mbps for RS-232. When unasserted, slew-rate limiting is active to reduce EMI at lower speeds.

What is the purpose of the SHDN pin?

The SHDN pin is an active-low shutdown control input. Driving it low shuts down the charge pump and transmitters, reducing the supply current to approximately 1µA while keeping RS-232 receivers active if applicable.

Can the device operate without external capacitors?

No, the device incorporates an internal dual charge pump that requires external flying capacitors (C1-C4) and a bypass capacitor (CBYPASS) to generate the necessary negative and positive voltages for RS-232 compliance.