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Microchip Technology ATWILC1000B-MU-Y042
- Part No.:
- ATWILC1000B-MU-Y042
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ATWILC1000B-MU-Y042.pdf
- Description:
- IC RF TXRX+MCU WIFI 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:486
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Product details
Overview
ATWILC1000B-MU-Y042 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 targets ultra-low-power mobile and IoT edge devices requiring certified Wi-Fi connectivity.
For engineers reviewing the ATWILC1000B-MU-Y042 datasheet, ATWILC1000B-MU-Y042 pinout, ATWILC1000B-MU-Y042 application, or ATWILC1000B-MU-Y042 equivalent, key selection criteria include its dual-host-interface flexibility (SPI/SDIO), integrated RF front-end, sub-1 μA deep power-down current, hardware-accelerated A-MSDU/A-MPDU aggregation, and MAC ID pre-programmed in eFuse Bank 0.
Technical Context
The ATWILC1000B-MU-Y042 integrates a Cortus APS3 32-bit processor handling MAC-layer functions including association, security key management, and STA/AP mode control. Its WLAN subsystem combines OFDM PHY with advanced channel estimation, equalization, and carrier/timing synchronization for robust 2.4 GHz ISM band operation.
It features a fully integrated RF transceiver with differential TX/RX paths (TX_P/TX_N, RFIOP/RFION), on-chip DC/DC converter (VBATT_BUCK/VSW/VREG_BUCK), and dual clocking: 26 MHz crystal oscillator (XO_P/XO_N) plus optional 32 kHz RTC clock input (GPIO1/RTC_CLK). Power architecture separates VDD_BATT_PA, VDD_BATT_PPA, VDD_RF_TX, and VDD_RF_RX rails for optimized RF efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Wi-Fi Standard | IEEE 802.11b/g/n, 20 MHz channel, 1×1 MIMO in 2.4 GHz ISM band - enables certified interoperability and legacy compatibility without external RF components. |
| PHY Data Rate | Up to 72 Mbps - maximum single-stream HT-MCS7 rate at 20 MHz bandwidth, sufficient for streaming audio and firmware OTA updates. |
| Operating Temperature | −40°C to +85°C - supports industrial and automotive cabin-adjacent deployments without derating. |
| Power Supply Ranges | VDDIO: 1.62–3.6 V; VBATT: 3.0–4.2 V - compatible with single-cell Li-ion and wide-input PMICs in portable designs. |
| Deep Power-Down Current | <1 μA at 3.3 V I/O - enables multi-year battery life in sensor nodes using scheduled wake-up via RTC or host interrupt. |
| Host Interfaces | SPI and SDIO (configurable via SDIO_SPI_CFG pin) - provides flexible integration with resource-constrained MCUs or application processors lacking SDIO peripherals. |
| On-Chip Memory | 128 KB ROM, 160 KB IRAM, 64 KB DRAM, 128 KB shared RAM - eliminates external memory dependency for full Wi-Fi stack execution. |
| eFuse Capacity | 768 bits across six 128-bit banks - stores pre-programmed MAC address (Bank 0), crystal offset calibration, and IQ correction data for production traceability. |
Pinout & Package
ATWILC1000B-MU-Y042 is supplied in a 5 mm × 5 mm, 40-pin QFN package with exposed thermal paddle (PADDLE VSS), requiring solder connection to system ground for RF stability and thermal dissipation. Pin count, pitch (0.4 mm), and pad layout match Microchip's standard ATWILC1000B-MU ordering variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDIO_SPI_CFG | Interface Mode Select | Configures host interface: tie to GND for SDIO, to VDDIO via 1 MΩ for SPI - enables single-BOM flexibility across MCU platforms. |
| GPIO0/HOST_WAKEUP | Host Wake Control | Asserted by device to signal host MCU exit from low-power state - supports fast resume (<10 ms) from Doze mode without polling. |
| GPIO2/IRQN | Interrupt Output | Active-low interrupt signaling packet arrival, connection status change, or error condition - reduces host CPU polling overhead. |
| XO_P / XO_N | Crystal Oscillator Input | Accepts 26 MHz fundamental-mode crystal (50–150 Ω ESR); internal 5 pF load capacitance simplifies external matching network design. |
| CHIP_EN | Global Device Enable | High-level active enable; default-low host output or 1 MΩ pull-down ensures safe power-up sequencing and zero-current standby. |
| RESETN | Hardware Reset | Active-low asynchronous reset; requires host-controlled deassertion after power stabilization to initiate boot sequence. |
| VBATT_BUCK / VSW / VREG_BUCK | DC/DC Converter Interface | VBATT_BUCK supplies buck input; VSW is switching node; VREG_BUCK delivers regulated core voltage - enables efficient 3.0–4.2 V battery operation. |
| TX_P / TX_N / RFIOP / RFION | Differential RF I/O | Direct connection to 50 Ω antenna or balun; no external PA/LNA/Switch required - reduces BOM count and RF layout complexity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated RF Front-End | On-die PA, LNA, and T/R switch eliminate discrete RF components, reduce PCB area by >30%, and guarantee calibrated TX power (up to +17 dBm) and RX sensitivity (−93 dBm @ 1 Mbps). |
| Hardware-Accelerated Frame Aggregation | Two-level A-MSDU/A-MPDU and Block Ack support increase effective throughput by ~40% over legacy 802.11g, reducing airtime and host processing load. |
| Multi-Mode Power Management | Three defined low-power states: Deep Power-Down (<1 μA), Doze (380 μA with beacon monitoring), and Sleep (on-chip 32 kHz oscillator) - enables precise energy budgeting for battery-powered endpoints. |
| Secure Boot & eFuse Provisioning | Pre-programmed MAC ID (Y042 suffix), factory-calibrated crystal offset, and IQ correction data stored in Bank 0 eFuse - ensures out-of-box compliance and eliminates field calibration steps. |
| Wi-Fi Direct® & Soft-AP Support | Enables peer-to-peer connections and local AP functionality without host OS driver dependency - accelerates development of standalone IoT gateways and commissioning tools. |
| Security Protocol Support | Full WEP, WPA, WPA2, and WPA2-Enterprise (802.1X/EAP-TLS) offload - relieves host MCU of cryptographic processing and key management overhead. |
Applications
| Smart Home Sensor Node | Industrial Wireless Gateway |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data every 5 minutes to cloud via home router. IC Role / Device Role / Timing Role: Wi-Fi link controller managing association, secure TLS handshake, and low-duty-cycle beacon listening in Doze mode. Use Value: Sub-1 μA deep power-down current extends CR2032 battery life beyond 3 years; integrated PA ensures reliable 20 m range through drywall. |
Use Scenario: DIN-rail mounted gateway aggregating Modbus RTU data from 10+ PLCs and forwarding via encrypted Wi-Fi to SCADA server. IC Role / Device Role / Timing Role: Embedded soft-AP providing local configuration portal and STA-mode uplink to enterprise WLAN with WPA2-Enterprise authentication. Use Value: Hardware-accelerated A-MPDU aggregation handles bursty Modbus traffic without host buffer overflow; −40°C to +85°C rating supports uncontrolled cabinet environments. |
| Portable Medical Monitor | Asset Tracking Tag |
|
Use Scenario: Wearable ECG patch uploading 30-second waveform snippets post-measurement using hospital Wi-Fi. IC Role / Device Role / Timing Role: Secure Wi-Fi client performing certificate-based authentication, AES-CCMP encryption, and adaptive TX power control per RSSI. Use Value: On-chip memory subsystem executes full TLS 1.2 stack without external RAM; 1.62–3.6 V VDDIO range matches medical-grade low-noise LDO output. |
Use Scenario: GPS-enabled logistics tag reporting location every 6 hours via public hotspot with captive portal login emulation. IC Role / Device Role / Timing Role: Standalone Wi-Fi controller executing HTTP POST with embedded credentials, handling DHCP/DNS, and managing session timeouts autonomously. Use Value: Pre-programmed MAC ID (Y042) and factory-calibrated RF parameters ensure zero-touch provisioning; 380 μA Doze current enables 5-year AA battery operation. |
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, Bluetooth LE, 4 MB flash; higher active current (≈80 mA), larger 18 mm × 25.5 mm module footprint. | Requires full embedded software development; better suited for applications needing local decision-making or BLE coexistence. | Select when onboard application processing, OTA updates, or Bluetooth pairing are mandatory - not for pure Wi-Fi offload use cases. |
| RTL8720DN | ARM Cortex-M23 core, 2.4/5 GHz dual-band, 1 MB PSRAM; lacks pre-provisioned MAC/eFuse calibration; requires external 26 MHz crystal loading caps. | Targets cost-sensitive consumer electronics; weaker RF performance (−91 dBm sensitivity) and no WPA2-Enterprise hardware acceleration. | Choose for dual-band requirement or lower unit cost where certification support and factory calibration are handled externally. |
Compared with ESP32-WROOM-32 and RTL8720DN, ATWILC1000B-MU-Y042 delivers certified 2.4 GHz Wi-Fi with minimal host dependency, factory-trimmed RF, and ultra-low sleep current - making it optimal for resource-constrained, battery-powered, and safety-critical edge nodes where reliability and time-to-certification matter most.
Availability
ATWILC1000B-MU-Y042 is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial wireless gateways, portable medical monitors, and asset tracking tags requiring stable component supply, long-term lifecycle assurance, and pre-certified Wi-Fi functionality.
Supply support for ATWILC1000B-MU-Y042 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, serving automotive, industrial, communications, and computing markets with a focus on reliability and long-term product availability.
ATWILC1000B-MU-Y042 belongs to Microchip's WILC family of highly integrated Wi-Fi SoCs designed specifically for ultra-low-power, host-processor-offload wireless connectivity in space- and energy-constrained embedded systems.
FAQ
What does the "Y042" suffix indicate in ATWILC1000B-MU-Y042?
The "Y042" suffix in ATWILC1000B-MU-Y042 denotes tray packaging (Y) and assignment of a unique, factory-programmed MAC address stored in eFuse Bank 0. This eliminates the need for post-silicon MAC provisioning during manufacturing and ensures IEEE-compliant uniqueness out of the box.
Does ATWILC1000B-MU-Y042 require an external crystal oscillator?
Yes, ATWILC1000B-MU-Y042 requires a 26 MHz fundamental-mode crystal connected to XO_P and XO_N pins. The device includes 5 pF internal load capacitance per terminal, so external loading capacitors must be selected accordingly to achieve ±25 ppm stability under operating conditions.
Can ATWILC1000B-MU-Y042 operate in both STA and AP modes simultaneously?
No, ATWILC1000B-MU-Y042 supports either STA (client) or Soft-AP mode, but not concurrent dual-role operation. Mode selection is configured via host driver initialization; switching requires firmware reload and full reinitialization of the Wi-Fi subsystem.
What is the function of the SDIO_SPI_CFG pin on ATWILC1000B-MU-Y042?
The SDIO_SPI_CFG pin on ATWILC1000B-MU-Y042 selects the host interface protocol: tied to GND for SDIO operation or to VDDIO via a 1 MΩ resistor for SPI mode. This allows one hardware design to support either interface without PCB revision, simplifying platform reuse.
How is the pre-programmed MAC address accessed and verified in ATWILC1000B-MU-Y042?
The pre-programmed MAC address in ATWILC1000B-MU-Y042 is stored in eFuse Bank 0 and read automatically by the Wi-Fi firmware during boot. It can be verified via host driver API calls (e.g., wilc_get_mac_address()) or by reading register 0x1010–0x1015 after initialization - no manual eFuse access is required.
ATWILC1000B-MU-Y042 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tray
- 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-Y042 FAQ
1.How can I place an order for ATWILC1000B-MU-Y042 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATWILC1000B-MU-Y042 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-Y042 reliable?
The price and inventory of ATWILC1000B-MU-Y042 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-Y042 is usually 5 days.
3.What payment methods are accepted for ATWILC1000B-MU-Y042?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATWILC1000B-MU-Y042 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATWILC1000B-MU-Y042?
ATWILC1000B-MU-Y042 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATWILC1000B-MU-Y042 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-Y042?
For technical support, including ATWILC1000B-MU-Y042 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATWILC1000B-MU-Y042 requirements.
6.How does Aetrix verify that ATWILC1000B-MU-Y042 is sourced from the original manufacturer or authorized distributors?
All ATWILC1000B-MU-Y042 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-Y042 meets industry standards.
7.What is the process for return or replacement of ATWILC1000B-MU-Y042?
All ATWILC1000B-MU-Y042 units undergo pre-shipment inspection (PSI). If there is an issue with ATWILC1000B-MU-Y042, 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-Y042 part is unused and in its original packaging.
Return procedure for ATWILC1000B-MU-Y042:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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