ATTINY25-20SNR

Overview

The ATTINY25-20SNR is an 8-bit AVR microcontroller manufactured by Microchip Technology. It features a high-performance RISC architecture with 2 KB of In-System Programmable Flash, 128 bytes of EEPROM, and 128 bytes of SRAM. The device supports a maximum clock frequency of 20 MHz at supply voltages between 4.5 V and 5.5 V, and 10 MHz at 2.7 V to 5.5 V. It includes six programmable I/O lines, a 4-channel 10-bit ADC, USI, and two PWM channels. The component operates within an industrial temperature range of -40°C to +105°C and is housed in an 8-lead SOIC package.

Feature Summary

• High-performance 8-bit AVR core executing most instructions in a single clock cycle
• Non-volatile memory including ISP Flash, EEPROM, and internal SRAM
• Integrated peripheral set featuring a 10-bit ADC, USI, and dual PWM outputs
• Low power consumption with multiple software-selectable sleep modes

Applications

• Industrial control systems requiring robust operation across wide temperature ranges
• Battery-powered embedded devices utilizing low-power sleep modes
• Sensor interfaces leveraging the integrated analog-to-digital converter
• General-purpose logic replacement in cost-sensitive consumer electronics

Procurement Notes

Verify that the ordering suffix 'R' corresponds to tape and reel packaging as specified in the manufacturer's documentation. Confirm the speed grade matches the required operational frequency for the target voltage range. Ensure the industrial temperature rating aligns with environmental constraints. Cross-reference the specific revision letter to check for any documented errata or silicon revisions affecting functionality.

Selection Notes

Select this variant when an 8-pin surface-mount solution is required for space-constrained designs. The 20 MHz speed grade provides higher processing throughput compared to lower-speed variants. Consider the 2.7V minimum operating voltage if designing for standard 3.3V or 5V logic levels without level shifting. Evaluate the pinout compatibility if migrating from legacy ATtiny15 designs using compatibility modes.

Part Context

This component belongs to the ATtiny25/45/85 family of 8-bit microcontrollers based on the AVR enhanced RISC architecture. These devices are designed for applications needing efficient code execution and low power consumption. The family shares common peripheral sets and instruction sets, allowing for scalable design progression based on memory and pin requirements.

Replacement Considerations

ATtiny25-20SU (SOIC-8 tube)

FAQ

What is the function of the 'R' suffix in the part number?

The 'R' suffix indicates that the device is supplied in tape and reel packaging format.

How does the ATTINY25-20SNR handle reset conditions?

A low level on the RESET pin generates a reset if held longer than the minimum pulse length, even if the clock is not running, unless the pin is disabled via configuration.