MAX214EPI

Drivers, Receivers, Transceivers Overview

The MAX214EPI is a +5V RS-232 transceiver in a 28-pin Plastic DIP package, rated for -40°C to +85°C operation. It provides an 8-line interface with software-configurable DTE or DCE functionality via the DTE/DCE pin. The device operates on a single +5V supply using four 1µF charge-pump capacitors to generate internal voltages. It supports data rates up to 116kbps and features a shutdown mode drawing typically 4µA while keeping receivers active. Electrical characteristics include ±15V input voltage range, 500mV receiver hysteresis, and propagation delays of 1.5ms (max) for normal operation.

Drivers, Receivers, Transceivers Feature Summary

• Software-configurable DTE/DCE port eliminates the need for null modem cables
• Integrated dual charge-pump voltage converter requires only 1µF external capacitors
• Low-power shutdown mode maintains active receivers for ring indicator detection

Drivers, Receivers, Transceivers Applications

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

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix EPI confirms the extended temperature range (-40°C to +85°C) and 28-PDIP package against current manufacturer documentation. Confirm component availability status as older Maxim Integrated products may have limited stock or obsolescence notices. Ensure ordering specifications match the required industrial temperature grade and physical footprint for PCB integration.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a complete 8-line RS-232 interface is required without swapping hardware cables between DTE and DCE configurations. It is suitable for single-supply +5V designs needing minimal external capacitance. Consider the 116kbps speed limit and shutdown power consumption requirements relative to other interface standards.

Drivers, Receivers, Transceivers Part Context

The MAX214 belongs to the Maxim Integrated MAX200-MAX209 and MAX211/MAX213 family of +5V RS-232 transceivers. Unlike standard variants, the MAX214 uniquely offers programmable DTE/DCE configuration through a control pin. This distinguishes it from fixed-function transceivers by allowing flexible serial port implementation in portable computing systems.

Drivers, Receivers, Transceivers Replacement Considerations

MAX214CPI: Identical function but limited to commercial temperature range (0°C to +70°C).

Drivers, Receivers, Transceivers FAQ

How does the MAX214 handle unused driver inputs?

Unused driver inputs can be left unconnected because the device includes 400kΩ pull-up resistors to VCC internally, which force the outputs low.

What is the behavior of receivers during shutdown mode?

Receivers remain active in shutdown mode to allow detection of signals like Ring Indicator. However, they operate at a slower guaranteed rate of 20kbps and lack hysteresis compared to normal operation.

Can the MAX214 drive multiple receivers?

Yes, by taking the HI-Z control pin high, the internal 5kΩ termination resistors are disconnected, making receiver inputs high impedance to facilitate multi-drop transmission.