MAX3243IPWRG4

Overview

The MAX3243IPWRG4 is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates within a supply voltage range of 3 V to 5.5 V, supporting both 3.3 V and 5 V logic systems. The device integrates three drivers and five receivers, providing full-duplex communication capabilities with a maximum data rate of 250 kb/s. It features an active low shutdown mode that reduces power consumption to less than 1 µA. The component includes ±15 kV electrostatic discharge (ESD) protection on the RS-232 lines and meets EIA/TIA-232-F and ITU-T V.28 standards. It is housed in a 28-pin TSSOP package.

Feature Summary

• Integrated charge pump circuitry eliminates the need for external capacitors
• Provides robust ±15 kV ESD protection on all RS-232 signal lines
• Features active low shutdown mode for significant power reduction
• Supports standard RS-232 protocols including EIA/TIA-232-F

Applications

• Industrial control systems requiring reliable serial communication
• Portable battery-powered equipment utilizing low-power modes
• Modems and fax machines adhering to V.28 standards
• Point-of-sale terminals and medical instrumentation

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free and RoHS compliance status as per Texas Instruments documentation. Confirm the package type corresponds to the 28-pin Thin Shrink Small Outline Package (TSSOP). Ensure the operating temperature range matches industrial requirements, typically spanning from -40°C to +85°C for this variant. Cross-reference the manufacturer part number directly with official TI databases to avoid counterfeit components.

Selection Notes

Select this component when designing circuits requiring multiple transmit and receive channels within a single IC. It is suitable for applications needing high ESD immunity without external protection devices. Consider the 250 kb/s data rate limit against system speed requirements. Evaluate the TSSOP-28 footprint availability against PCB layout constraints compared to SOIC or SSOP alternatives.

Part Context

This part belongs to the MAX3243 family of multichannel RS-232 transceivers. It shares functional similarities with the MAX3243IDW and MAX3243CPW but differs in package style and temperature rating. The IPWRG4 designation specifically denotes the industrial temperature range and TSSOP packaging format. It serves as a direct replacement for legacy MAX3243 variants where space-saving surface mount technology is required.

Replacement Considerations

Direct pin-compatible substitutes include the MAX3243IDW and MAX3243CPW, though package differences must be accounted for during board redesign. The TRS3243IPWRG4 offers similar functionality but may require verification of electrical parameter compatibility. Always consult the latest datasheets to confirm pinout integrity and electrical specifications before substitution.