ADM1181AARW-REEL

Overview

The ADM1181AARW-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 features ±15 kV ESD protection on all I/O lines, complying with IEC1000-4-2 standards. It includes internal charge-pump circuitry requiring four external 0.1 µF capacitors for voltage generation. The component provides two drivers and two receivers in a 16-lead SOIC package.

Feature Summary

• Compliant with EU EMC directive 89/336/EEC
• Integrated charge-pump DC-to-DC converter
• Schmitt-trigger receiver inputs with hysteresis
• Internal pull-down resistors on receiver inputs

Applications

• General-purpose RS-232 data links
• Portable instruments
• PDAs

Procurement Notes

Verify the specific reel quantity and tape-and-reel packaging configuration against the manufacturer's ordering guide before purchase. Confirm that the suffix indicates the correct reel size for automated assembly processes. Ensure compatibility with standard surface-mount reflow profiles.

Selection Notes

Select this component when robust EMI/EMC performance is required in harsh electrical environments. It serves as a direct pin-compatible upgrade for older MAX202E or LTC1181A designs. Consider the TSSOP variant if board space is limited, as it is smaller than the standard SOIC package.

Part Context

This part belongs to the ADM202E/ADM1181A family of high-speed RS-232 line drivers and receivers. It is designed to replace legacy interface chips while offering improved electromagnetic immunity. The device utilizes CMOS technology to minimize power dissipation, making it suitable for battery-operated applications.

Replacement Considerations

The ADM1181A is a pin-compatible replacement for the LTC1181A. For broader system upgrades, consider the ADM202E, which shares similar specifications but offers additional package options including TSSOP.