MAX3243EIPWRE4

Overview

The MAX3243EIPWRE4 is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates on a single 3-V to 5.5-V supply and integrates three drivers and five receivers within a 28-pin TSSOP package. The device supports data rates up to 500 kb/s and features full-duplex communication capability. It includes an integrated charge pump circuit requiring only four small external capacitors. Key electrical specifications include a typical operating supply current of 1 mA and propagation delay of 0.15 µs. The component provides ±15-kV electrostatic discharge (ESD) protection on RS-232 bus pins, ensuring robust performance in industrial environments.

Feature Summary

• Integrates three independent line drivers and five line receivers for comprehensive serial communication interfaces.
• Features automatic power-down functionality that significantly reduces supply current when the device is idle.
• Provides ±15-kV ESD protection on all RS-232 signal lines to enhance system reliability against static discharge events.

Applications

• Battery-powered portable equipment such as PDAs and laptops
• Industrial control systems requiring robust serial communication
• Handheld devices and personal digital assistants

Procurement Notes

Verify the specific suffix RE4 indicates tape and reel packaging configuration distinct from tube variants. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the ordering part number matches the required temperature grade and package type for the target application design constraints.

Selection Notes

Select this component when designing systems requiring multiple RS-232 channels with low standby power consumption. The TSSOP-28 package offers a compact footprint suitable for space-constrained PCB layouts. Verify that the 500 kb/s data rate meets the throughput requirements of the connected asynchronous controllers and serial peripherals.

Part Context

This part belongs to the MAX3243 family of multichannel RS-232 transceivers designed for IBM PC/AT compatible serial ports. The E variant denotes extended temperature performance capabilities compared to standard commercial grades. The IPWR suffix identifies the specific TSSOP package style and reel packaging format used for surface-mount assembly processes.

Replacement Considerations

MAX3243EIDBR: SSOP-28 package variant with identical electrical characteristics. MAX3243EIDWRG4: SOIC-28 package alternative maintaining the same functional pinout and performance metrics. MAX3243CDBRE4: Commercial grade version with limited temperature range compared to the extended grade E variant.