MAX3243ECPWG4

Overview

The MAX3243ECPWG4 is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates from a single 3-V to 5.5-V supply and integrates three drivers and five receivers with an internal charge pump. The device supports data rates up to 250 kb/s and provides ±15-kV ESD protection on all RS-232 lines per IEC standards. It features an auto-powerdown mode that reduces supply current to 1 µA when inputs are unpowered. The component is housed in a 28-pin TSSOP package and is rated for extended industrial operating temperatures ranging from -40°C to +85°C.

Feature Summary

• Integrates three independent drivers and five independent receivers within a single chip.
• Provides robust electrostatic discharge protection of ±15 kV on all RS-232 signal lines.
• Includes an automatic power-down feature to minimize energy consumption during idle periods.
• Utilizes an internal charge pump to generate required voltage levels from a single low-voltage supply.

Applications

• Industrial control systems requiring reliable serial communication in electrically noisy environments.
• Battery-powered portable equipment where low standby current is critical for battery life extension.
• Embedded systems interfacing microcontrollers with RS-232 peripherals such as modems or barcode scanners.

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free compliance and RoHS adherence as per manufacturer specifications. Confirm the package variant matches the required PCB footprint, specifically the 28-pin thin-shrink small-outline package dimensions. Ensure the temperature grade corresponds to the intended operational environment constraints before finalizing procurement orders.

Selection Notes

Select this component when designing systems that require multiple RS-232 channels without external voltage generation circuitry. It is suitable for applications needing high ESD immunity and low quiescent current. Compare against standard commercial grades if extended temperature ranges or enhanced reliability metrics are not strictly necessary for the target deployment scenario.

Part Context

This part belongs to the MAX3243 family of multichannel RS-232 transceivers. It shares functional similarities with other members like the MAX3243ECPW but differs in packaging and specific environmental ratings. The 'E' designation typically denotes an extended temperature range compared to commercial variants, while 'G4' signifies green/RoHS-compliant manufacturing processes.

Replacement Considerations

Direct pin-compatible alternatives include the TRS3243EIPWRG4. Verify electrical parameters and temperature ranges match the original design requirements before substituting. Cross-reference datasheets to ensure interface compatibility and performance equivalence in the specific application context.