MAX3238ECAI

Overview

The MAX3238ECAI+ is a multichannel RS-232 transceiver manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 250 kb/s. The device integrates five drivers and three receivers for full-duplex communication. It features 15 kV ESD protection on I/O and logic pins, with a propagation delay of 0.15 µs. Operating current is typically 2 mA. The component is housed in an SSOP-28 package and functions reliably across a commercial temperature range of 0°C to +70°C.

Feature Summary

• Integrates five independent drivers and three receivers for multichannel serial communication.
• Provides robust 15 kV electrostatic discharge protection on both input/output and logic pins.
• Includes a shutdown mode to minimize power consumption during idle periods.
• Operates directly from single 3-V to 5.5-V power supplies without requiring external charge pumps.

Applications

• Industrial control systems requiring reliable serial communication interfaces.
• Portable instrumentation and battery-powered devices utilizing low-power operation.
• Modem and communications equipment needing high ESD tolerance.
• Point-of-sale terminals and barcode scanners operating in electrically noisy environments.

Procurement Notes

Verify the specific suffix designation when ordering, as it indicates the packaging format and temperature grade. The base model MAX3238E corresponds to the industrial grade (-40°C to +85°C), while the 'C' variant specifies the commercial grade (0°C to +70°C). Confirm RoHS compliance status through official manufacturer documentation or authorized distributor specifications prior to procurement to ensure regulatory adherence.

Selection Notes

Select this component when designing circuits that require multiple RS-232 channels within a compact footprint. Ensure the application environment remains within the 0°C to +70°C operational limit defined for the commercial grade. Verify that the system power supply stays between 3 V and 5.5 V to maintain signal integrity. Consider the SSOP-28 package dimensions for PCB layout constraints and thermal management requirements during the design phase.

Part Context

This part belongs to the MAX3238E series of multichannel RS-232 transceivers. It shares functional similarities with other Maxim Integrated interface ICs but is distinguished by its specific combination of five drivers and three receivers. The 'ECAI+' suffix denotes the commercial temperature range, SSOP-28 package, and lead-free construction. It serves as a direct replacement for legacy multichannel RS-232 solutions in modern embedded systems.

Replacement Considerations

The MAX3238EEAI+ offers identical electrical characteristics but extends the operating temperature range to -40°C to +85°C. For automotive applications, the Texas Instruments MAX3238IPWG4Q1 provides AEC-Q100 qualification. Both alternatives maintain pin compatibility and similar performance metrics, allowing for straightforward substitution if environmental conditions exceed commercial limits.