ATTINY20-SSU

Overview

The ATTINY20-SSU is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture, manufactured by Microchip Technology. It features 2K bytes of in-system programmable Flash memory and 128 bytes of internal SRAM. The device operates at speeds up to 12 MIPS at 12MHz with a supply voltage range of 1.8V to 5.5V. It includes an 8-channel 10-bit ADC, two timer/counters with PWM channels, SPI, and TWI interfaces. Packaged in a 14-lead SOIC (14S1), it supports industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Advanced RISC architecture enabling single clock cycle execution for high throughput
• In-system programmable non-volatile Flash memory with extended data retention
• Integrated analog-to-digital converter with eight single-ended channels
• Multiple power-saving modes including idle, ADC noise reduction, and power-down

Applications

• Battery-powered embedded systems requiring low active current consumption
• Industrial control applications utilizing SPI and TWI communication interfaces
• Sensor interface circuits leveraging the 10-bit ADC and analog comparator
• General-purpose I/O expansion using programmable interrupt sources

Procurement Notes

Verify the specific ordering code suffix matches the required package type and speed grade. Confirm RoHS compliance status as per the manufacturer's latest documentation. Check for any recent product change notices regarding marking or packaging updates. Ensure the industrial temperature range meets the operational environment requirements. Validate that the 14-lead SOIC footprint aligns with the PCB design specifications.

Selection Notes

Select this component when a compact 8-bit AVR solution with integrated ADC and serial interfaces is needed. Consider the 12MHz maximum frequency for processing requirements within the specified voltage range. Evaluate the 12 programmable I/O lines against system pin count needs. Review the available power modes to optimize energy efficiency for battery-operated designs.

Part Context

This part belongs to the ATtiny series of 8-bit microcontrollers, designed for cost-sensitive and space-constrained applications. It shares the core AVR architecture with other devices in the family but offers specific memory sizes and peripheral configurations. The ATTINY20 variant provides a balance of processing capability and peripheral integration suitable for simple control tasks.

Replacement Considerations

Direct pin-compatible replacements within the same package may include other ATtiny20 variants with different speed grades or lead finishes. Verify electrical characteristics and memory size when substituting with higher-density parts like the ATtiny25. Ensure software compatibility if migrating between devices with differing peripheral counts.