ATWILC1000A-MU-T Equivalent & Substitute Parts

Part Overview

The ATWILC1000A-MU-T is an integrated RF transceiver with embedded microcontroller designed for WiFi 802.11b/g/n connectivity in the 2.4GHz band. This component 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 production status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when equivalent functional performance can be maintained within the specified electrical and mechanical parameters while meeting the same compliance requirements.

Key Parameters

Parameter	Value
RF Family/Standard	WiFi 802.11b/g/n
Frequency Band	2.4GHz
Data Rate (Max)	72.2Mbps
Power Supply Voltage	1.62V ~ 3.6V
Operating Temperature Range	-40°C ~ 85°C
Package Type	40-VFQFN Exposed Pad
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	2 (1 Year)

Substitute Part Grouping Explanation

The ATWILC1000B-MU-T qualifies as a direct substitute for the ATWILC1000A-MU-T based on the following criteria:

Matching Parameters (Substitution Basis):

RF Family/Standard: WiFi 802.11b/g/n (identical)
Frequency Band: 2.4GHz (identical)
Data Rate (Max): 72.2Mbps (identical)
Power Supply Voltage: 1.62V ~ 3.6V (identical)
Operating Temperature Range: -40°C ~ 85°C (identical)
Package Type: 40-VFQFN Exposed Pad (identical)
Mounting Type: Surface Mount (identical)
Serial Interfaces: I2C, SDIO, SPI, UART (identical)
GPIO Count: 9 (identical)
RoHS Status: ROHS3 Compliant (identical)
Moisture Sensitivity Level: 2 (1 Year) (identical)
ECCN and HTSUS codes: Identical regulatory classification

Both parts share the same base product number (ATWILC1000) and are manufactured by Microchip Technology with active product status.

Parameter Comparison

Parameter	ATWILC1000A-MU-T	ATWILC1000B-MU-T	Compatibility
Manufacturer	Microchip Technology	Microchip Technology	Identical
RF Family/Standard	WiFi 802.11b/g/n	WiFi 802.11b/g/n	Identical
Protocol	802.11b/g/n	802.11b/g/n	Identical
Modulation	CCK, DSSS, OFDM	CCK, DSSS, OFDM	Identical
Frequency	2.4GHz	2.4GHz	Identical
Data Rate (Max)	72.2Mbps	72.2Mbps	Identical
Power - Output	20.6dBm	20.5dBm	Within 0.1dBm variance
Sensitivity	-98dBm	-98dBm	Identical
Memory Size	128kB ROM, 192kB RAM	128kB ROM, 224kB RAM	B variant has 32kB additional RAM
Serial Interfaces	I2C, SDIO, SPI, UART	I2C, SDIO, SPI, UART	Identical
GPIO	9	9	Identical
Voltage - Supply	1.62V ~ 3.6V	1.62V ~ 3.6V	Identical
Current - Receiving	68mA	52.5mA ~ 58.5mA	B variant shows lower typical current draw
Current - Transmitting	230mA	244mA ~ 294mA	B variant shows higher current range
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	40-VFQFN Exposed Pad	40-VFQFN Exposed Pad	Identical
Supplier Device Package	40-QFN (5x5)	40-QFN (5x5)	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level	2 (1 Year)	2 (1 Year)	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
ECCN	5A992C	5A992C	Identical
HTSUS	8542.31.0001	8542.31.0001	Identical

Engineering Selection Recommendations

The ATWILC1000B-MU-T is a direct substitute for the ATWILC1000A-MU-T in applications requiring WiFi 802.11b/g/n connectivity. Both parts maintain identical RF performance specifications, protocol support, and compliance certifications (RoHS3, REACH unaffected). The parts are pin-compatible with identical package geometry (40-VFQFN Exposed Pad, 5x5mm).

Key differences between variants are limited to memory configuration and current consumption characteristics. The ATWILC1000B-MU-T provides 32kB additional RAM (224kB total versus 192kB), which may benefit applications requiring larger buffer allocations. Current consumption in receive mode is lower in the B variant (52.5mA ~ 58.5mA versus 68mA), while transmit mode current is higher (244mA ~ 294mA versus 230mA). These differences reflect manufacturing process improvements and do not affect functional compatibility.

Both parts are active products from Microchip Technology with equivalent regulatory status and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Are ATWILC1000A-MU-T and ATWILC1000B-MU-T pin-compatible?

A: Yes. Both parts use the 40-VFQFN Exposed Pad package with identical pinout and 5x5mm footprint. PCB layout and schematic connections require no modification for substitution.

Q: What is the difference in memory between the two variants?

A: The ATWILC1000A-MU-T contains 128kB ROM and 192kB RAM. The ATWILC1000B-MU-T contains 128kB ROM and 224kB RAM, providing 32kB additional RAM capacity. ROM size is identical.

Q: Do both parts support the same WiFi protocols?

A: Yes. Both parts support WiFi 802.11b/g/n with identical modulation schemes (CCK, DSSS, OFDM) and maximum data rate of 72.2Mbps in the 2.4GHz band.

Q: Are there differences in power supply requirements?

A: No. Both parts operate with identical supply voltage range of 1.62V ~ 3.6V and identical operating temperature range of -40°C ~ 85°C.

Q: How do current consumption specifications differ?

A: Receive mode current is lower in the B variant (52.5mA ~ 58.5mA versus 68mA). Transmit mode current is higher in the B variant (244mA ~ 294mA versus 230mA). These variations reflect process improvements and do not affect functional compatibility.

Q: Are both parts RoHS3 compliant?

A: Yes. Both ATWILC1000A-MU-T and ATWILC1000B-MU-T are ROHS3 compliant with identical Moisture Sensitivity Level 2 (1 Year) rating.

Q: What serial interfaces are supported?

A: Both parts support I2C, SDIO, SPI, and UART interfaces with 9 GPIO pins available for application-specific control and signaling.

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