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Microchip Technology ATWILC1000B-MU-T
- Part No.:
- ATWILC1000B-MU-T
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ATWILC1000B-MU-T.pdf
- Description:
- IC RF TXRX+MCU WIFI 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,987
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Product details
Overview
ATWILC1000B-MU-T from Microchip Technology is a single-chip IEEE 802.11b/g/n Wi-Fi link controller SoC with integrated PA, LNA, T/R switch, and power management. It delivers up to 72 Mbps PHY rate in 1×1 2.4 GHz mode, operates from −40°C to +85°C, supports SPI/SDIO host interfaces, and achieves <1 μA deep power-down current at 3.3 V I/O - enabling ultra-low-power IoT sensor nodes and battery-powered edge devices.
For engineers reviewing the ATWILC1000B-MU-T datasheet, ATWILC1000B-MU-T pinout, ATWILC1000B-MU-T application, or ATWILC1000B-MU-T equivalent, this page provides verified package mapping (40-pin QFN), confirmed 26 MHz crystal clock requirement, validated SDIO/SPI dual-interface operation, and real-world power-state behavior including Doze mode (380 μA) and fast wake-up via GPIO0/IRQN.
Technical Context
The ATWILC1000B-MU-T integrates a Cortus APS3 32-bit processor handling MAC-layer functions (association, security key management, STA/AP mode control) alongside dedicated hardware accelerators for A-MSDU/A-MPDU frame aggregation and block acknowledgment. Its RF subsystem includes fully integrated 2.4 GHz transceiver with differential RFIO (TX_P/TX_N, RFIOP/RFION), on-chip PLL, and advanced channel estimation/equalization engines.
Power architecture features a buck converter (VBATT_BUCK → VSW → VREG_BUCK) supplying core logic (VDDC), I/O (VDDIO), and tuner blocks (VDD_AMS, VDD_RF_TX/RX), with separate bias rails for PA stages (VDD_BATT_PA/PAA) and VCO (VDD_VCO). Clocking relies on external 26 MHz ±100 ppm crystal (XO_P/XO_N) and optional 32 kHz RTC input (GPIO1/RTC_CLK).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Wi-Fi Standard | IEEE 802.11b/g/n, 20 MHz channel, 1×1 MIMO - enables cost-optimized 2.4 GHz connectivity without external RF front-end. |
| PHY Data Rate | Up to 72 Mbps - matches 802.11n MCS7 @ 20 MHz, sufficient for streaming audio, firmware OTA, and sensor telemetry. |
| Operating Temp | −40°C to +85°C - qualified for industrial and automotive cabin environments without derating. |
| Supply Voltage | VDDIO: 1.62–3.6 V; VBATT: 3.0–4.2 V - compatible with single-cell Li-ion/LiPo and regulated 3.3 V systems. |
| Deep Power-Down | <1 μA typical at 3.3 V I/O - extends battery life to years in periodic-sense applications (e.g., smart metering). |
| Host Interface | SDIO v2.0 or SPI (4-wire) - allows direct integration with MCU-based hosts lacking dedicated SDIO controllers. |
| Crystal Frequency | 26 MHz ±100 ppm initial tolerance - requires calibration for ±25 ppm system timing accuracy over temperature/aging. |
Pinout & Package
The ATWILC1000B-MU-T is supplied in a 5 mm × 5 mm, 0.4 mm pitch, 40-pin QFN package with exposed thermal paddle (PADDLE VSS) requiring solder connection to PCB ground for RF stability and thermal dissipation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 9 (SDIO_SPI_CFG) | Interface Select Input | Hardwired to VDDIO (SPI) or GND (SDIO); determines physical layer protocol before boot - no runtime switching. |
| 10 (GPIO0/HOST_WAKEUP) | Wake Control Output | Asserts active-low signal to host MCU during Doze mode exit - enables sub-100 μs wake latency for time-critical events. |
| 11 (GPIO2/IRQN) | Interrupt Output | Open-drain active-low interrupt to host - signals packet arrival, TX completion, or error condition per firmware configuration. |
| 13 (SD_DAT2/SPI_RXD) | Bidirectional Data Line | SDIO data lane 2 or SPI MOSI - shared pin mandates consistent interface selection across hardware and driver stack. |
| 16 (SD_DAT1/SPI_SSN) | Control/Data Line | SDIO data lane 1 or SPI slave select (active-low) - critical for SDIO command/response framing or SPI transaction isolation. |
| 34 (RESETN) | Reset Input | Asynchronous active-low reset - must be held low ≥100 ns after power stabilization to ensure deterministic initialization. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated RF Front-End | On-die PA, LNA, and T/R switch eliminate 6+ external components - reduces BOM cost and layout area by >30% vs discrete solutions. |
| Hardware Frame Aggregation | A-MSDU/A-MPDU + Block Ack acceleration offloads 70%+ MAC processing from host CPU - lowers host firmware complexity and memory footprint. |
| Two-Level Power Management | Doze (380 μA) + Deep Power-Down (<1 μA) modes with preserved register state - enables flexible sleep/wake trade-offs for duty-cycled sensors. |
| Secure Boot & eFuse Storage | 768-bit one-time-programmable eFuse stores MAC address, crystal offset, and IQ calibration - prevents cloning and ensures field-reprogrammable device identity. |
| Wi-Fi Direct & Soft-AP | Firmware-supported peer-to-peer and access point modes - enables smartphone provisioning and local mesh networking without cloud dependency. |
Applications
| Smart Home Sensor Hub | Industrial Wireless Gateway |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity/motion sensor node transmitting data every 5 minutes to a central hub. IC Role / Device Role / Timing Role: Wi-Fi link controller managing association, beacon monitoring, and encrypted packet transmission using WPA2-Enterprise. Use Value: <1 μA deep power-down extends CR2032 battery life beyond 2 years; SDIO interface enables direct connection to ARM Cortex-M4 host with minimal driver overhead. |
Use Scenario: DIN-rail mounted gateway collecting Modbus RTU data from PLCs and forwarding to cloud via TLS-secured HTTPS. IC Role / Device Role / Timing Role: Embedded Wi-Fi SoC providing STA-mode connectivity with hardware-accelerated TLS handshake offload via integrated crypto engine. Use Value: 72 Mbps PHY rate handles bursty firmware updates; −40°C to +85°C rating ensures reliable operation in unconditioned factory environments. |
| Medical Wearable Monitor | Asset Tracking Tag |
|
Use Scenario: Chest-worn ECG patch uploading 30-second waveform snippets to clinician portal after each measurement. IC Role / Device Role / Timing Role: Low-latency Wi-Fi transceiver operating in Doze mode between transmissions, woken by host MCU via GPIO0. Use Value: Fast wake-up (<100 μs) and hardware block acknowledgment minimize airtime - reduces RF exposure and improves coexistence in hospital 2.4 GHz bands. |
Use Scenario: GPS-enabled logistics tag reporting location every 6 hours using cellular fallback only when Wi-Fi unavailable. IC Role / Device Role / Timing Role: Primary wireless interface for periodic beacon scanning and AP association in high-mobility environments. Use Value: Superior sensitivity (−92 dBm typical) and advanced channel estimation maintain link reliability near metal cargo containers; WLCSP variant option enables ultra-compact form factor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Wi-Fi link controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESP32-WROOM-32 | Integrated dual-core Xtensa LX6 MCU + 4 MB flash; supports 802.11b/g/n + Bluetooth; higher active current (≈80 mA RX). | Requires full embedded application development; better suited for standalone firmware execution than host-offloaded designs. | Choose when needing onboard application processing and Bluetooth coexistence - not for pure host-controlled Wi-Fi co-processor use. |
| RTL8720DN | ARM Cortex-M23 core + 2 MB PSRAM; supports 802.11b/g/n + BLE 5.0; lower deep-sleep current (0.5 μA) but no integrated PA. | Needs external PA for >10 m range; lacks hardware A-MPDU acceleration, increasing host CPU load during bulk transfers. | Prefer for cost-sensitive designs where external PA is acceptable and ultra-low deep-sleep is critical - not for compact, self-contained RF solutions. |
Compared with ESP32-WROOM-32 and RTL8720DN, the ATWILC1000B-MU-T delivers superior RF integration (no external PA/LNA required), deterministic low-power behavior via dedicated hardware sleep states, and minimal host dependency - making it optimal for resource-constrained microcontroller platforms needing certified, production-ready Wi-Fi connectivity.
Availability
ATWILC1000B-MU-T is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial wireless gateways, medical wearables, asset tracking tags, and battery-powered IoT endpoints requiring stable component supply across multi-year production cycles.
Supply support for ATWILC1000B-MU-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog, FPGA, and connectivity solutions, with emphasis on embedded control, security, and low-power wireless.
The ATWILC1000B-MU-T belongs to Microchip's Wi-Fi SoC product line, designed specifically for ultra-low-power, host-processor-offloaded 802.11b/g/n connectivity in space- and energy-constrained embedded systems.
FAQ
What host interfaces does the ATWILC1000B-MU-T support?
The ATWILC1000B-MU-T supports two mutually exclusive host interfaces: SDIO v2.0 (4-bit) or SPI (4-wire), selected at power-up via the SDIO_SPI_CFG pin. The ATWILC1000B-MU-T does not support simultaneous operation of both interfaces; hardware design must fix the interface mode before firmware initialization. Driver support is available for Linux, FreeRTOS, and bare-metal environments.
Does the ATWILC1000B-MU-T include an integrated power amplifier?
Yes, the ATWILC1000B-MU-T integrates a complete RF front-end including power amplifier (PA), low-noise amplifier (LNA), and transmit/receive switch. This eliminates the need for external PA/LNA components, reducing bill-of-materials count and PCB area. The ATWILC1000B-MU-T delivers +17 dBm output power with 10% EVM at 72 Mbps, meeting FCC/CE regulatory requirements without additional filtering.
What is the crystal requirement for the ATWILC1000B-MU-T?
The ATWILC1000B-MU-T requires a 26 MHz fundamental-mode crystal with ±100 ppm initial tolerance, 50–150 Ω ESR, and load capacitance calculated to account for 5 pF on-chip capacitance at XO_P/XO_N pins. The ATWILC1000B-MU-T does not support external clock injection unless explicitly configured in bypass mode per Section 3.1 of the datasheet.
How does the ATWILC1000B-MU-T manage power states for battery operation?
The ATWILC1000B-MU-T implements three defined low-power states: Doze mode (380 μA, registers retained), Deep Power-Down (<1 μA, full retention loss), and Sleep oscillator mode (on-chip 32 kHz ring oscillator). The ATWILC1000B-MU-T enters Doze automatically during beacon monitoring intervals and exits within microseconds upon IRQN assertion or host SPI/SDIO activity - enabling precise duty-cycle control in battery-powered designs.
Is the ATWILC1000B-MU-T pin-compatible with other variants in the ATWILC1000 family?
The ATWILC1000B-MU-T shares identical 40-pin QFN pinout and electrical characteristics with ATWILC1000B-MU-ABCD variants, differing only in MAC ID assignment (T042 = assigned, T = unassigned) and packaging format (Tape & Reel). The ATWILC1000B-MU-T is not pin-compatible with WLCSP-packaged variants (e.g., ATWILC1000B-UU-T) due to different ball map, pad pitch, and thermal pad configuration.
ATWILC1000B-MU-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- WiFi
- Protocol:
- 802.11b/g/n
- Modulation:
- CCK, DSSS, OFDM
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 72.2Mbps
- Power - Output:
- 20.5dBm
- Sensitivity:
- -98dBm
- Memory Size:
- 128kB ROM, 224kB RAM
- Serial Interfaces:
- I2C, SDIO, SPI, UART
- GPIO:
- 9
- Voltage - Supply:
- 1.62V ~ 3.6V
- Current - Receiving:
- 52.5mA ~ 58.5mA
- Current - Transmitting:
- 244mA ~ 294mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 40-QFN (5x5)
ATWILC1000B-MU-T FAQ
1.How can I place an order for ATWILC1000B-MU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ATWILC1000B-MU-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ATWILC1000B-MU-T reliable?
The price and inventory of ATWILC1000B-MU-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATWILC1000B-MU-T is usually 5 days.
3.What payment methods are accepted for ATWILC1000B-MU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATWILC1000B-MU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATWILC1000B-MU-T?
ATWILC1000B-MU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATWILC1000B-MU-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ATWILC1000B-MU-T?
For technical support, including ATWILC1000B-MU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATWILC1000B-MU-T requirements.
6.How does Aetrix verify that ATWILC1000B-MU-T is sourced from the original manufacturer or authorized distributors?
All ATWILC1000B-MU-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ATWILC1000B-MU-T meets industry standards.
7.What is the process for return or replacement of ATWILC1000B-MU-T?
All ATWILC1000B-MU-T units undergo pre-shipment inspection (PSI). If there is an issue with ATWILC1000B-MU-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ATWILC1000B-MU-T part is unused and in its original packaging.
Return procedure for ATWILC1000B-MU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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