ATTINY40-XU

Overview

The ATtiny40-XU is an 8-bit AVR microcontroller featuring a compact RISC architecture with up to 12 MIPS throughput at 12 MHz. It includes 4K bytes of in-system programmable Flash, 256 bytes of SRAM, and 18 programmable I/O lines. The device operates within a voltage range of 1.8V to 5.5V and supports industrial temperatures from -40°C to +85°C. Key peripherals include a 10-bit ADC, two timers/counters, SPI, and TWI interfaces.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high efficiency
• Integrated non-volatile memory with high endurance and long data retention capabilities
• Comprehensive peripheral set including analog-to-digital conversion and serial communication modules
• Multiple software-selectable power-saving modes to optimize energy consumption

Applications

• Battery-powered embedded systems requiring low active current
• Industrial control applications operating in extended temperature ranges
• Sensor interface nodes utilizing the internal analog comparator and ADC
• General-purpose logic replacement using programmable I/O lines

Procurement Notes

Verify the specific ordering suffix 'XU' corresponds to the matte tin lead finish and TSSOP-20 package as defined in the official Microchip ordering guide. Confirm that the revision level meets project requirements, noting errata regarding MISO driver behavior and sleep mode current consumption for Rev B devices. Ensure compatibility with existing programming tools for ISP functionality.

Selection Notes

Select this component when a balance of processing speed and low power consumption is required for space-constrained designs. The XU suffix indicates a specific package and termination suitable for surface mount assembly. Consider the available I/O count and peripheral integration against application needs before choosing alternative pin counts or memory sizes within the tinyAVR family.

Part Context

This device belongs to the tinyAVR 1-Series family, designed for cost-sensitive and power-efficient applications. It utilizes Atmel's high-density non-volatile memory technology. The series emphasizes code efficiency through its enhanced RISC core, allowing designers to achieve performance levels approaching 1 MIPS per MHz while maintaining minimal power usage across various operational states.

Replacement Considerations

ATtiny40-SU: Identical electrical specifications but packaged in SOIC-20 with NiPdAu finish. ATtiny40-XUR: Same functional unit as XU but supplied in tape and reel format for automated assembly. ATtiny40-MMH: Alternative VQFN-20 package option.