ATA5781-WNQW-VAO

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ATA5781-WNQW-VAO

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RF Microcontrollers - MCU

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Equivalent

The ATA5781-WNQW-VAO is a secure transponder chip by Microchip. Equivalent products include:
- ATA5780: Similar functionality, lower memory.
- ATA5830: Enhanced range, newer model.
- NXP’s HITAG series: Competing secure transponders.
- STMicroelectronics’ ST25TA: NFC alternative.
Check datasheets for exact compatibility. For direct replacements, consult Microchip’s cross-reference tools or distributors.

Features

The ATA5781-WNQW-VAO is a highly integrated RF transceiver IC designed for sub-GHz wireless applications. Key features include:
- Frequency Range: 310–928 MHz, supporting global ISM bands.
- Modulation Schemes: FSK, GFSK, MSK, OOK, and ASK.
- Data Rate: Up to 500 kbps.
- Low Power Consumption: Optimized for battery-operated devices.
- High Sensitivity: Down to -121 dBm (at 1.2 kbps).
- Integrated MCU: 8-bit AVR core for embedded processing.
- Peripherals: ADC, SPI, UART, GPIO, and timers.
- Package: Compact 5x5 mm QFN.
- Applications: Smart metering, home automation, industrial IoT.
It combines RF performance with embedded processing, reducing external component count.

Pinout

The ATA5781-WNQW-VAO is a 32-pin QFN (Quad Flat No-leads) package RF transceiver IC designed for keyless entry systems and TPMS (Tire Pressure Monitoring Systems). Key functions include:
- Low-power RF transceiver (315/434/868/915 MHz bands)
- ASK/FSK modulation
- Integrated microcontroller core (8-bit AVR)
- SPI interface for communication
- Analog and digital I/O for sensor integration
Pins are allocated for power (VCC, GND), RF (antenna I/O), SPI, GPIO, and clock/reset. The compact QFN package suits space-constrained automotive applications.

Manufacturer

The ATA5781-WNQW-VAO is manufactured by Microchip Technology, a leading American semiconductor company specializing in microcontroller, mixed-signal, analog, and Flash-IP solutions. Microchip is known for its embedded control systems, serving industries like automotive, industrial, consumer electronics, and IoT. The ATA5781 is part of their RF/transceiver product line, designed for wireless applications such as remote keyless entry (RKE) and tire pressure monitoring systems (TPMS). Microchip, founded in 1989 and headquartered in Chandler, Arizona, is recognized for its reliable, low-power, and cost-effective semiconductor solutions.

Application

The ATA5781-WNQW-VAO is a transceiver IC designed for sub-1GHz wireless applications. Key application areas include:
- Automotive: Tire pressure monitoring systems (TPMS), remote keyless entry (RKE).
- Industrial: Wireless sensor networks, machine-to-machine (M2M) communication.
- Consumer Electronics: Smart home devices, garage door openers.
- IoT: Low-power, short-range wireless connectivity.
It supports FSK/ASK/OOK modulation, operates in 315/434/868/915 MHz bands, and features low power consumption, making it ideal for battery-operated devices.

Package

The ATA5781-WNQW-VAO is available in a QFN-32 (5x5 mm) package. This compact, lead-free, surface-mount package is designed for high-performance RF applications, offering efficient thermal dissipation and space-saving integration. The 32-pin configuration supports robust connectivity for wireless systems.

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