MAX3243EIPWG4

Overview

The MAX3243EIPWG4 is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates on a single power supply ranging from 3 V to 5.5 V and features three drivers and five receivers for full-duplex communication. The device supports data rates up to 500 kb/s and includes an integrated shutdown mode that reduces supply current to approximately 1 µA. It provides ±15 kV electrostatic discharge (ESD) protection on the bus lines according to IEC 61000-4-2 standards. The component is housed in a 28-pin TSSOP package and is rated for operation over an extended temperature range of -40°C to +85°C.

Feature Summary

• Integrated auto-powerdown circuitry minimizes battery consumption during idle periods by automatically entering low-current shutdown mode.
• High ESD tolerance protects sensitive interface ports against electrical discharges, ensuring reliable operation in harsh environments.
• True transmitter functionality ensures output voltages exceed standard RS-232 levels, improving noise immunity over long cable runs.

Applications

• Industrial control systems requiring robust serial communication interfaces
• Portable instrumentation and medical devices utilizing battery power
• Modem and communications equipment interfacing

Procurement Notes

Verify the complete part number including the G4 suffix to confirm lead-free compliance and specific packaging configuration. Confirm the TSSOP-28 package variant matches the target PCB footprint requirements. Ensure the industrial temperature grade aligns with the operational environment specifications before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring multiple independent RS-232 channels within a compact surface-mount form factor. The high data rate capability supports faster baud rates compared to legacy alternatives. Consider the low standby current benefits for applications prioritizing energy efficiency and extended battery life in portable deployments.

Part Context

This device belongs to the MAX3243E family of multichannel transceivers designed for RS-232 applications. The IPWG4 designation specifically identifies the industrial temperature range version packaged in a thin-shrink small-outline package. It serves as a direct replacement for older generation multi-channel drivers while offering improved power management features.

Replacement Considerations

Compatible substitutes include the MAX3243EIDWRG4 and MAX3243EIDBRG4, which offer identical electrical performance but utilize SOIC-28 and SSOP-28 packages respectively. Verify pin compatibility and thermal characteristics when transitioning between different package types within the same functional family.

FAQ

What is the typical supply current in shutdown mode?

The supply current drops to approximately 1 µA maximum when the shutdown pin is asserted, significantly reducing power consumption during idle states.

Does the device support 3.3 V logic levels?

Yes, the MAX3243EIPWG4 is compatible with both 3.3 V and 5 V logic families, allowing flexible integration with various microcontroller interfaces.

How many independent channels does this transceiver provide?

The device integrates three independent drivers and five receivers, enabling simultaneous communication across multiple RS-232 ports.