ATWILC1000A-MU-Y Equivalent & Substitute Parts

Part Overview

The ATWILC1000A-MU-Y is an integrated RF transceiver with embedded microcontroller designed for WiFi 802.11b/g/n connectivity in the 2.4GHz band. This Surface Mount device combines RF transmission and reception capabilities with an onboard MCU, eliminating the need for separate wireless modules in embedded applications. The part is currently in Active product status with 5560 units available in inventory. Substitute parts are identified when electrical performance, mechanical compatibility, and compliance certifications remain equivalent or superior across critical operating parameters.

Substiute Parts

ATWILC1000A-MU-Y

Microchip TechnologyIn Stock: 5585ATWILC1000A-MU-Y Datasheet

Current PartRFQ

ATWILC1000B-MU-Y

Microchip TechnologyIn Stock: 2237ATWILC1000B-MU-Y Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The ATWILC1000B-MU-Y qualifies as a direct substitute based on the following criteria:

Electrical Compatibility: Both parts operate within identical voltage supply ranges (1.62V ~ 3.6V), support the same RF protocol (802.11b/g/n at 2.4GHz), and maintain equivalent receiver sensitivity (-98dBm). Maximum data rate remains constant at 72.2Mbps.

Mechanical Compatibility: Both devices use identical 40-VFQFN Exposed Pad packaging (5x5mm footprint), enabling direct PCB layout compatibility without redesign.

Interface Compatibility: Serial communication interfaces (I2C, SDIO, SPI, UART) and GPIO count (9 pins) are identical, ensuring firmware and hardware interface compatibility.

Compliance & Certification: Both parts maintain ROHS3 compliance, REACH Unaffected status, and identical ECCN classification (5A992C), supporting equivalent regulatory requirements.

Product Status: Both parts are Active with current inventory availability, ensuring supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

ATWILC1000A-MU-Y is the primary selection when transmit current efficiency is critical or when designs are optimized for the 230mA transmit profile. This variant maintains Active product status with substantial inventory (5560 units), ensuring supply availability.

ATWILC1000B-MU-Y is the preferred alternative when receive current efficiency, extended RAM capacity (224kB vs 192kB), or superior moisture handling (MSL 2 vs MSL 3) are design requirements. This variant offers lower receive current consumption (52.5mA ~ 58.5mA vs 68mA), reducing overall power budget in receive-heavy applications. The improved MSL rating (2, 1 Year) provides extended shelf life and reduced reflow sensitivity.

Both parts maintain identical regulatory compliance (ROHS3, REACH Unaffected, ECCN 5A992C) and mechanical compatibility, supporting direct substitution in existing designs without PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can ATWILC1000B-MU-Y replace ATWILC1000A-MU-Y in existing designs?

A: Yes. Both parts share identical package geometry (40-VFQFN Exposed Pad, 5x5mm), pinout, supply voltage range (1.62V ~ 3.6V), RF protocol (802.11b/g/n), and serial interfaces (I2C, SDIO, SPI, UART). Direct PCB substitution is supported without layout changes.

Q: What are the key differences between these variants?

A: The ATWILC1000B-MU-Y offers improved receive current efficiency (52.5mA ~ 58.5mA vs 68mA), increased RAM (224kB vs 192kB), and superior moisture sensitivity rating (MSL 2 vs MSL 3). The ATWILC1000A-MU-Y maintains lower transmit current (230mA vs 244mA ~ 294mA range).

Q: Are both parts currently available?

A: Yes. ATWILC1000A-MU-Y has 5560 units in stock; ATWILC1000B-MU-Y has 2136 units in stock. Both maintain Active product status.

Q: Do these parts require different firmware or driver support?

A: Firmware and driver compatibility is determined by the base product number (ATWILC1000) shared by both variants. Consult Microchip Technology documentation for variant-specific firmware requirements.

Q: What is the impact of the different MSL ratings?

A: ATWILC1000A-MU-Y (MSL 3, 168 Hours) requires reflow within 168 hours of moisture absorption. ATWILC1000B-MU-Y (MSL 2, 1 Year) allows extended storage and handling, reducing production scheduling constraints.

Q: Are both parts RoHS compliant?

A: Yes. Both ATWILC1000A-MU-Y and ATWILC1000B-MU-Y are ROHS3 Compliant and REACH Unaffected, meeting equivalent environmental and regulatory requirements.