AVR64DB64T-E/MR

Overview

The AVR64DB64T-E/MR is an 8-bit microcontroller from the AVR DB family, featuring a 64 KB Flash memory, 8 KB SRAM, and 512 bytes of EEPROM. It operates at clock speeds up to 24 MHz with a supply voltage range of 1.8V to 5.5V. The device includes a 12-bit differential ADC with 22 channels, three analog comparators, three zero-cross detectors, and a 10-bit DAC. It offers up to 55 programmable I/O pins in a VQFN64 package (MR suffix) with an extended temperature range (-40°C to +125°C).

Feature Summary

• Multi-Voltage I/O (MVIO) capability on Port C for flexible interface levels.
• Configurable Custom Logic (CCL) with six Look-up Tables for hardware logic implementation.
• Event System enabling CPU-independent inter-peripheral signaling.
• Automated Cyclic Redundancy Check (CRCSCAN) for Flash program memory integrity.

Applications

• Industrial control systems requiring robust analog signal processing.
• Smart home appliances utilizing multi-voltage interfaces.
• IoT devices needing low-power operation with event-driven architectures.
• Power control applications leveraging Zero-Cross Detectors and TCD timers.

Procurement Notes

Verify the ordering suffix 'E' confirms the extended temperature range (-40°C to +125°C) and 'MR' specifies the VQFN64 package. Ensure the 'T' suffix indicates tape and reel packaging if required for automated assembly. Cross-reference the datasheet DS40002300B for specific pinout and electrical characteristics relevant to your design constraints.

Selection Notes

Select this part for designs requiring high I/O counts (up to 55) within a compact VQFN64 footprint. The extended temperature rating suits harsh environments. Consider the 22-channel 12-bit ADC and integrated op-amps for sensor-heavy applications. Verify that the 64 KB Flash and 8 KB SRAM meet the code and data storage requirements compared to smaller variants like the AVR64DB28.

Part Context

This component belongs to the AVR64DB28/32/48/64 series, which shares pin and feature compatibility for vertical migration. The AVR DB family utilizes a modern architecture with an Event System and advanced analog peripherals, distinguishing it from older AVR families. It serves as a high-performance 8-bit MCU option for Microchip's industrial and consumer markets.

Replacement Considerations

AVR64DB48T-E/MR: Offers similar features but with fewer I/O pins and ADC channels due to the smaller package. AVR64DB64T-I/MR: Identical specifications except for the Industrial temperature range (-40°C to +85°C) instead of Extended.

FAQ

What does the 'MR' suffix indicate for this microcontroller?

The 'MR' suffix denotes the VQFN64 package style, which is a 9x9 mm Quad Flat No-leads package.

Can the AVR64DB64T-E/MR operate with external voltage references?

Yes, it supports an External Voltage Reference (VREFA) in addition to internal references such as 1.024V, 2.048V, 2.500V, and 4.096V.