ADM202EARWZ-REEL

Overview

The ADM202EARWZ-REEL is a dual-channel RS-232 transceiver manufactured by Analog Devices Inc. It operates from a single 5 V power supply (4.5 V to 5.5 V) and supports data rates up to 230 kbps. The device integrates charge-pump circuitry requiring four external 0.1 µF capacitors to generate internal ±10 V rails. It features robust ESD protection rated at ±15 kV for air-gap discharge and ±8 kV for contact discharge, along with EFT immunity of ±2 kV. The component is housed in a 16-lead SOIC package and functions as an upgrade for legacy MAX202E and LT1181A designs.

Feature Summary

• Compliant with EU EMC directives including EN55022 emissions standards
• Integrated high-speed clamping diodes protect all I/O lines against electrostatic discharge and electrical fast transients
• Schmitt-trigger receiver inputs provide hysteresis to ensure error-free reception on noisy signals
• Internal pull-down resistors on receiver inputs maintain defined logic states when unconnected

Applications

• General-purpose RS-232 data links
• Portable instruments requiring low power consumption
• Personal Digital Assistants (PDAs)
• ISDN modem interfaces

Procurement Notes

Verify the specific ordering suffix to confirm the tape and reel packaging format intended for automated assembly. Confirm that the component version matches the required industrial temperature range specifications. Ensure the source documentation aligns with the exact part number designation to avoid discrepancies in pinout or electrical characteristics.

Selection Notes

Select this component when upgrading existing MAX202E or LT1181A circuits without altering the PCB layout. Choose this device for applications requiring compliance with strict electromagnetic compatibility regulations. Consider this option for portable systems where single-supply operation and low quiescent current are critical design constraints.

Part Context

This component belongs to the ADM202E/ADM1181A family of RS-232 line drivers and receivers. It serves as a direct pin-compatible replacement for older generation interface chips while offering enhanced noise immunity. The series is designed to bridge CMOS logic levels with standard RS-232 voltage requirements using integrated charge pumps.

Replacement Considerations

The ADM202E is a drop-in replacement for MAX202E and LT1181A devices. Verify that the legacy component's package dimensions match the target SOIC footprint before substitution.