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Microchip Technology WILCS02ICT-I/ZZX
- Part No.:
- WILCS02ICT-I/ZZX
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
WILCS02ICT-I/ZZX.pdf
- Description:
- WI-FI LINK CONTROLLER SOC, 802.1
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
WILCS02ICT-I/ZZX from Microchip Technology is a 2.4 GHz IEEE 802.11b/g/n single-stream (1×1) Wi-Fi Link Controller IC with integrated high-power amplifier (HPA), low-noise amplifier (LNA), and RF switches. It operates at 3.3 V (3.0–3.6 V range), supports SDIO or SPI host interface, and delivers hardware-accelerated AES-128/192/256, SHA-1/SHA-2, and ECC up to 521-bit for secure embedded wireless connectivity in industrial control systems.
For engineers reviewing the WILCS02ICT-I/ZZX datasheet, WILCS02ICT-I/ZZX pinout, WILCS02ICT-I/ZZX application, or WILCS02ICT-I/ZZX equivalent, key selection criteria include its AEC-Q100 Grade 2 qualification, -40°C to 105°C operating temperature, 48-pin VQFN (7 mm × 7 mm) package, integrated 2 MB flash, and hardware-based PTA coexistence support for Wi-Fi/Bluetooth® systems.
Technical Context
The WILCS02ICT-I/ZZX implements a full WLAN MAC/baseband/PHY stack with dedicated crypto engines (AES, TDES, SHA, HMAC, ECDSA, RSA-2048) and immutable secure boot rooted in hardware. Its RF front-end integrates TX/RX switching, HPA, LNA, and matching circuitry - all controlled via on-chip power management unit (PMU) with multiple 1.5 V LDO outputs and buck regulator.
It supports dual host interfaces: SDIO (default) or SPI (via strap pins DFU_RX/STRAP1 and DFU_TX/STRAP2), and includes dedicated PTA signals (PTA_WLAN_ACTIVE, PTA_BT_PRIO, RTCC_OSC_IN/PTA_BT_ACTIVE) for time-synchronized arbitration with Bluetooth® devices - configurable but mutually exclusive with RTCC oscillator functionality in current firmware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Wi-Fi Standard | IEEE 802.11b/g/n, 2.4 GHz band only, 1×1 SISO, 20 MHz bandwidth - compatible with Wi-Fi 6/7 2.4 GHz operation but not 5 GHz or MIMO. |
| Supply Voltage | VDD/VDDIO: 3.0–3.6 V (3.3 V typical); enables direct interfacing with 3.3 V logic without level shifters. |
| Operating Temp | -40°C to +105°C - qualified to AEC-Q100 Grade 2, suitable for under-hood automotive and harsh industrial environments. |
| Crypto Acceleration | Hardware AES-128/192/256 (ECB/CBC/CTR/CFB/OFB), SHA-1/SHA-2, ECDSA/ECDH (NIST P-256/P-384/P-521, Curve25519), RSA-2048 - offloads CPU and ensures deterministic timing for secure OTA updates. |
| Integrated Memory | 2 MB stacked flash - stores full Wi-Fi firmware, security keys, and application binaries; eliminates need for external flash in compact designs. |
| Host Interface | SDIO v2.0 or SPI (SDIO-SPI mode) - selected at boot via strap pins; SDIO offers higher throughput (up to 25 Mbps), SPI simplifies routing in space-constrained layouts. |
| RF Output Power | +18 dBm (typical) at 2.4 GHz - meets regulatory limits while enabling robust link budget in noisy industrial settings. |
Pinout & Package
WILCS02ICT-I/ZZX is housed in a 48-pin Very Thin Quad Flat No-lead (VQFN) package measuring 7 mm × 7 mm × 0.9 mm, with exposed thermal pad (Pin 49) on the bottom side for PCB-level heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SD_CMD/SCK1 (Pin 3) | SDIO Command / SPI Clock | Configurable dual-function pin: SDIO command line or SPI serial clock - determines host interface mode during boot. |
| DFU_RX/STRAP1 (Pin 34) | Strap Input / DFU Receive | Pull-low (100 kΩ) selects SDIO; pull-high (10 kΩ) selects SPI; also serves as UART RX for device firmware update. |
| PTA_WLAN_ACTIVE (Pin 43) | WLAN Activity Indicator | Open-drain active-low output signaling Wi-Fi transmission activity - used by Bluetooth® controller to defer transmissions and avoid RF collision. |
| MCLR (Pin 36) | Master Clear Reset | Active-low asynchronous reset input - requires external RC network (e.g., 10 kΩ + 0.1 µF) for reliable power-on and glitch immunity. |
| VDD33 (Pins 14, 41, 45) | Main Power Domain Supply | Three dedicated 3.3 V inputs reduce IR drop and improve noise immunity; must be decoupled individually with 0.1 µF ceramic capacitors near each pin. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Root of Trust | Immutable secure boot with cryptographic signature verification prevents unauthorized firmware execution - essential for certified industrial and automotive deployments. |
| Wi-Fi/Bluetooth Coexistence | Three-wire PTA interface compliant with IEEE 802.15.2 enables deterministic packet arbitration without software intervention or latency jitter. |
| On-chip Power Management | Integrated PMU provides six regulated 1.5 V outputs (LDOs and buck) - eliminates need for external regulators and reduces BOM count by ≥4 components. |
| Secure Firmware Upgrade | DFU over UART or host-assisted side-loading supports authenticated, encrypted OTA updates - maintains chain-of-trust across full lifecycle. |
| Antenna Calibration Support | Dedicated UART1 signals (SD_CLK/UART1_RX, SD_DATA3/UART1_TX) enable factory calibration of external antennas - improves RF performance consistency across production units. |
Applications
| Industrial Control Gateway | Smart Security Camera |
|---|---|
|
Use Scenario: Wireless edge gateway collecting sensor data from PLCs and HMIs in factory automation networks. IC Role / Device Role / Timing Role: Wi-Fi Link Controller IC handling MAC/PHY processing, secure TLS handshake, and real-time PTA arbitration with Bluetooth-enabled maintenance tools. Use Value: AEC-Q100 Grade 2 rating and -40°C to 105°C operation ensure reliability in uncontrolled cabinet environments; integrated crypto accelerates certificate validation without MCU overhead. |
Use Scenario: Battery-powered indoor/outdoor CCTV camera requiring low-latency video streaming and secure cloud upload. IC Role / Device Role / Timing Role: Standalone Wi-Fi SoC managing RF transmission, hardware AES-GCM encryption of video frames, and SDIO burst transfers to host SoC. Use Value: +18 dBm output power extends range through walls; 2 MB internal flash stores firmware and encryption keys - no external memory required for tamper-resistant design. |
| Automotive Telematics Module | Wireless Industrial Sensor Node |
|
Use Scenario: In-vehicle infotainment companion module enabling Wi-Fi hotspot and OTA diagnostics via service bay access. IC Role / Device Role / Timing Role: Certified 2.4 GHz WLAN controller with hardware WPA3-Enterprise support and PTA coordination for concurrent Bluetooth hands-free calls. Use Value: FCC/CE/MIC/NCC certifications pre-validated for global deployment; AEC-Q100 qualification eliminates requalification effort for automotive Tier 1 suppliers. |
Use Scenario: Ruggedized vibration/temperature sensor node deployed in oil & gas pipelines with mesh backhaul requirements. IC Role / Device Role / Timing Role: Low-power Wi-Fi transceiver executing secure DFU over MQTT, using hardware RNG for session key generation and ECC for mutual authentication. Use Value: 1.5 V internal rail generation reduces external component count; -40°C to 105°C operation sustains functionality in extreme ambient conditions without derating. |
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 | Lacks AEC-Q100 qualification; operates only to +85°C; uses external flash; no hardware PTA or immutable secure boot. | Better suited for consumer IoT where cost and development speed outweigh safety certification needs. | Choose WILCS02ICT-I/ZZX when automotive/industrial certification, extended temperature, or hardware-enforced security are mandatory. |
| ATWILC3000-MR210PB | Same Microchip family but older generation; supports only 802.11b/g, no 802.11n; no ECC/RSA acceleration; 1 MB flash. | Legacy replacement for designs already using ATWILC3000 with minimal firmware changes. | WILCS02ICT-I/ZZX provides 2× flash, full 802.11n throughput, and modern crypto - upgrade recommended for new designs. |
Compared with ESP32-WROOM-32 and ATWILC3000-MR210PB, WILCS02ICT-I/ZZX uniquely combines AEC-Q100 Grade 2, -40°C to 105°C operation, 2 MB embedded flash, and hardware PTA - making it the only option qualified for safety-critical industrial gateways and automotive telematics without external security co-processors or temperature derating.
Availability
WILCS02ICT-I/ZZX is available at Aetrix Electronics and suitable for industrial control gateways, automotive telematics modules, and smart security cameras requiring stable component supply across multi-year production cycles.
Supply support for WILCS02ICT-I/ZZX 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and secure wireless solutions - with broad industrial, automotive, and aerospace design-in presence.
The WILCS02IC product line delivers certified, hardware-secured Wi-Fi connectivity for resource-constrained embedded systems - designed specifically for applications demanding functional safety, long-term availability, and zero-trust security architecture.
FAQ
What is the primary function of the WILCS02ICT-I/ZZX in a system?
The WILCS02ICT-I/ZZX functions as a standalone Wi-Fi Link Controller IC - integrating MAC, baseband, PHY, RF front-end (HPA/LNA/switches), and hardware crypto engines. It handles full 802.11b/g/n protocol stack execution, secure boot, and PTA arbitration, enabling host MCUs to delegate Wi-Fi and security tasks without software stack licensing or runtime overhead. WILCS02ICT-I/ZZX eliminates the need for external RF components, flash memory, or security co-processors in certified designs.
Does the WILCS02ICT-I/ZZX support 5 GHz Wi-Fi bands?
No, the WILCS02ICT-I/ZZX supports only the 2.4 GHz ISM band per IEEE 802.11b/g/n specifications. It does not implement 5 GHz radios, 802.11ac, or 802.11ax (Wi-Fi 6/7) 5 GHz features. Its compatibility statement with Wi-Fi 6/7 refers exclusively to 2.4 GHz band operation - confirmed in DS70005557D Section 1.1 and Table 3-1. WILCS02ICT-I/ZZX is optimized for cost-sensitive, thermally constrained, and safety-certified 2.4 GHz applications.
How is the host interface (SDIO vs. SPI) selected on the WILCS02ICT-I/ZZX?
Host interface selection is determined at power-up by strapping pins DFU_RX/STRAP1 (Pin 34) and DFU_TX/STRAP2 (Pin 35). Pulling STRAP1 low (100 kΩ to GND) configures SDIO mode; pulling it high (10 kΩ to VDD) selects SPI. STRAP2 is recommended pulled high for future firmware compatibility. This configuration is latched during reset and cannot be changed dynamically. WILCS02ICT-I/ZZX does not support run-time interface switching - the choice is fixed per hardware design.
What certifications apply to the WILCS02ICT-I/ZZX itself?
The WILCS02ICT-I/ZZX die is AEC-Q100 Grade 2 qualified (-40°C to +105°C) and RoHS/REACH compliant. Regulatory certifications (FCC, CE, UKCA, MIC, KCC, NCC, SRRC, ANATEL) apply to the fully assembled WILCS02 module (e.g., WILCS02PE/WILCS02UE), not the bare WILCS02ICT-I/ZZX IC. As a component, WILCS02ICT-I/ZZX requires integration into a certified module or end-product - its qualification ensures foundational compliance readiness but does not substitute for final-system radio approvals.
Can the WILCS02ICT-I/ZZX operate without external crystal oscillators?
No - the WILCS02ICT-I/ZZX requires a 40 MHz fundamental-mode crystal connected to XTL_IN (Pin 18) and XTL_OUT (Pin 19) for main system clock generation. It also supports optional 32.768 kHz crystal for RTCC (Pins 39–40), though current firmware does not enable RTCC functionality. The 40 MHz crystal is mandatory; omission prevents boot and RF operation. WILCS02ICT-I/ZZX contains no internal oscillator capable of replacing the 40 MHz crystal for WLAN timing accuracy.
WILCS02ICT-I/ZZX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- TxRx Only
- RF Family/Standard:
- Bluetooth, WiFi
- Protocol:
- 802.11b/g/n
- Modulation:
- CCK, DSSS, OFDM
- Frequency:
- -
- Data Rate (Max):
- 54Mbps
- Power - Output:
- 20dBm
- Sensitivity:
- -97dBm
- Memory Size:
- 2MB Flash
- Serial Interfaces:
- SDIO, SPI, UART
- GPIO:
- 10
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Receiving:
- 88mA ~ 94mA
- Current - Transmitting:
- 249mA ~ 289mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-VQFN (7x7)
WILCS02ICT-I/ZZX FAQ
1.How can I place an order for WILCS02ICT-I/ZZX through Aetrix?
Please submit a Request for Quotation (RFQ) for WILCS02ICT-I/ZZX 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 WILCS02ICT-I/ZZX reliable?
The price and inventory of WILCS02ICT-I/ZZX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for WILCS02ICT-I/ZZX is usually 5 days.
3.What payment methods are accepted for WILCS02ICT-I/ZZX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for WILCS02ICT-I/ZZX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for WILCS02ICT-I/ZZX?
WILCS02ICT-I/ZZX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your WILCS02ICT-I/ZZX 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 WILCS02ICT-I/ZZX?
For technical support, including WILCS02ICT-I/ZZX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your WILCS02ICT-I/ZZX requirements.
6.How does Aetrix verify that WILCS02ICT-I/ZZX is sourced from the original manufacturer or authorized distributors?
All WILCS02ICT-I/ZZX 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 WILCS02ICT-I/ZZX meets industry standards.
7.What is the process for return or replacement of WILCS02ICT-I/ZZX?
All WILCS02ICT-I/ZZX units undergo pre-shipment inspection (PSI). If there is an issue with WILCS02ICT-I/ZZX, 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 WILCS02ICT-I/ZZX part is unused and in its original packaging.
Return procedure for WILCS02ICT-I/ZZX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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