MAX2821ETM+TD

RF Transceiver ICS Overview

The MAX2821ETM+TD is a zero-IF transceiver IC designed for 802.11b Wi-Fi applications operating at 2.4GHz. It supports CCK modulation with a maximum data rate of 22Mbps and delivers 3dBm output power. The device features -97dBm sensitivity and operates on a 2.7V to 3.6V supply, drawing 70mA during transmission and 80mA during reception. Packaged in a 48-WFQFN (7x7mm) surface-mount format with exposed pads, it functions within a temperature range of -40°C to 85°C.

RF Transceiver ICS Feature Summary

• Zero-IF architecture for direct baseband connection
• Integrated biasing for common-mode voltage drive
• SPI serial interface control

RF Transceiver ICS Applications

• 802.11b wireless LAN modules
• 2.4GHz IoT devices
• Wi-Fi enabled consumer electronics

RF Transceiver ICS Procurement Notes

Verify the exact suffix against the manufacturer's current datasheet, as '+T' and '+TD' may indicate specific tape-and-reel or qualification variants. Confirm RoHS3 compliance status and check for end-of-life notifications, as this component family has been subject to discontinuation notices. Ensure the ordering part number matches the required package and environmental specifications.

RF Transceiver ICS Selection Notes

Select this component for narrowband 2.4GHz applications requiring simple integration with baseband ADCs. The internal 1.2V common-mode bias simplifies analog front-end design by allowing direct connection to downstream converters. Consider the 48-pin QFN footprint for space-constrained PCB layouts and verify thermal dissipation requirements for the exposed pad design.

RF Transceiver ICS Part Context

This part belongs to the MAX282x series of RF transceivers from Maxim Integrated, now part of Analog Devices. It is specifically optimized for legacy 802.11b standards, offering a cost-effective solution for basic Wi-Fi connectivity. The series typically includes variants like the MAX2820 and MAX2821, differing primarily in frequency ranges and feature sets.

RF Transceiver ICS Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult Analog Devices for current alternatives or cross-reference lists, as direct pin-to-pin replacements may require schematic adjustments due to architectural differences in newer generations.