MAX214EWI

Overview

The MAX214EWI is a +5V RS-232 transceiver in a 28-pin Wide SOIC package, rated for -40°C to +85°C operation. It provides eight software-configurable lines (Tx, Rx, RTS, CTS, DTR, DSR, DCD, RI) selectable as DTE or DCE via the DTE/DCE pin. Operating from a single +5V supply with four 1µF charge-pump capacitors, it guarantees an 116kbps data rate and ±5.0V output swing under worst-case conditions. The device features a 20µA shutdown mode where receivers remain active for ring indicator detection.

Feature Summary

• Software-selectable DTE or DCE configuration eliminates the need for null modem cables
• Dual charge-pump voltage converter generates required RS-232 voltages using only four 1µF external capacitors
• Low-power shutdown mode reduces supply current while keeping receivers active for signal monitoring

Applications

• AT-Compatible Laptop Computers
• AT-Compatible Desktop Computers
• Modems, Printers, and Other Peripherals

Procurement Notes

Verify the specific suffix 'EWI' confirms the wide SOIC package and industrial temperature range (-40°C to +85°C). Cross-reference the manufacturer's official datasheet to confirm current production status and any recent component revisions before finalizing procurement specifications.

Selection Notes

Select this component when a single IC must support both DTE and DCE serial port configurations without hardware changes. Ensure the design accommodates four 1µF external capacitors for the dual charge pump. Verify that the 116kbps guaranteed data rate meets system requirements.

Part Context

This part belongs to the MAX214 family of programmable RS-232 transceivers. The 'E' designation indicates the extended industrial temperature range, while 'WI' specifies the 28-pin wide small-outline package. It serves as a complete interface solution for legacy serial communication ports.

Replacement Considerations

Consult the manufacturer's official replacement guide for verified substitutes. Generic RS-232 transceivers may lack the integrated DTE/DCE configurability or specific shutdown characteristics.