MAX242EPN

Overview

The MAX242EPN is a +5V-powered, multichannel RS-232 transceiver from the MAX220–MAX249 family. It integrates two drivers and two receivers with an internal charge pump for single-supply operation. The device supports data rates up to 200 kbps and operates within a supply voltage range of 4.5V to 5.5V. It features a shutdown mode with typical current consumption of 10µA at +25°C. The component is housed in an 18-pin Plastic DIP package and is rated for commercial operating temperatures from 0°C to +70°C.

Feature Summary

• Integrated charge-pump circuitry eliminates the need for external bipolar ±12V supplies
• Enables single +5V supply operation for simplified power design
• Shutdown mode significantly reduces power consumption for battery applications

Applications

• Interface translation between TTL/CMOS logic and RS-232 standards
• Multidrop RS-232 communication networks
• Portable diagnostic equipment requiring low power consumption

Procurement Notes

Verify the specific suffix 'EPN' against official Analog Devices documentation to confirm the exact temperature grade and package variant. Confirm RoHS compliance status as manufacturing processes may change over time. Ensure the source document matches the manufacturer's official datasheet for the MAX220-MAX249 family to validate all electrical parameters.

Selection Notes

Select this component when designing systems that require RS-232 connectivity but lack negative voltage rails. The integrated charge pump simplifies board layout by removing external inductors or dual supplies. Verify that the required data rate does not exceed 200 kbps and that the 18-pin PDIP footprint fits the mechanical constraints of the target enclosure.

Part Context

The MAX242EPN belongs to the MAX220–MAX249 family of line drivers and receivers designed for EIA/TIA-232E interfaces. This family allows designers to implement serial communications using a single +5V supply. The EPN designation indicates a specific plastic DIP package configuration suitable for through-hole mounting on standard printed circuit boards.

Replacement Considerations

Compatible substitutes within the same family include the MAX242CPE+ (PDIP) and MAX242CWE+ (SOIC). These parts share identical electrical characteristics and pinouts but differ in package type and potentially temperature rating. Verify that any replacement maintains the required 18-pin configuration and shutdown functionality.