AVR64DA32ST-I/QZB

Overview

The AVR64DA32ST-I/QZB is an 8-bit microcontroller from Microchip Technology, part of the AVR DA series. It features a Flash program memory size of 64 kB and SRAM data RAM of 8 kB. The device operates with a maximum clock frequency of 24 MHz and includes a 12-bit ADC with 14 channels. It provides 27 I/O lines and supports interfaces including I2C, SPI, and USART. The unit is housed in a TQFP-32 package and functions within a supply voltage range of 1.8 V to 5.5 V across an operating temperature of -40°C to +85°C.

Feature Summary

• Integrates a 12-bit analog-to-digital converter with multiple input channels for signal acquisition.
• Includes dedicated zero-crossing detection circuits for AC mains monitoring applications.
• Features programmable comparator blocks for hardware-based threshold comparisons.
• Supports serial communication via multiple UART, SPI, and TWI interface modules.

Applications

• Smart metering and utility monitoring systems
• Industrial control panels requiring AC line sensing
• Sensor interface nodes with analog signal processing needs

Procurement Notes

Verify the specific suffix QZB against official Microchip documentation to confirm package type and tape-and-reel specifications. Ensure the ordering code matches the required commercial temperature grade and RoHS compliance status before finalizing procurement orders.

Selection Notes

Select this component when a balance of moderate memory capacity and rich peripheral integration is required. The inclusion of zero-crossing detectors makes it suitable for AC-coupled applications without external circuitry. Evaluate pin count requirements against the 27 available I/O lines to ensure adequate connectivity for the target design.

Part Context

This device belongs to the AVR DA family, which emphasizes high performance and low power consumption in 8-bit architectures. It shares architectural similarities with other AVR DA variants but offers specific pin counts and peripheral configurations tailored for cost-sensitive industrial and consumer electronics applications.

Replacement Considerations

Consult Microchip's official cross-reference tools for verified substitutes. Potential alternatives within the same family include AVR64DA28 or AVR64DA48 variants, depending on whether fewer or additional pins are acceptable for the application.