ATTINY26-16SUR

Overview

The ATtiny26-16SUR is an 8-bit AVR microcontroller in a 20-lead SOIC package. It features 2K bytes of In-System Programmable Flash, 128 bytes of EEPROM, and 128 bytes of SRAM. The device operates at speeds up to 16 MHz with a supply voltage range of 4.5V to 5.5V. Key peripherals include an 8-bit Timer/Counter with PWM outputs, a Universal Serial Interface (USI), an 8-bit high-speed timer, and an on-chip Analog Comparator. It supports external and internal interrupts and includes a programmable Watchdog Timer.

Feature Summary

• High-performance RISC architecture executing most instructions in a single clock cycle
• Integrated 10-bit ADC with multiple single-ended and differential channel options
• Universal Serial Interface supporting TWI or SM-bus software implementation
• Low-power operation with Idle, Noise Reduction, Power-down, and Standby modes

Applications

• Battery chargers
• Lighting ballasts
• Low-end thermostats
• Fire detectors

Procurement Notes

Verify the ordering code matches the specific speed grade and package configuration required for the design. Confirm that the industrial temperature range (-40°C to +85°C) aligns with environmental specifications. Ensure the 4.5V to 5.5V operating voltage range is compatible with the system power supply. Check for any specific revision notes or errata related to analog comparator performance upon power-up.

Selection Notes

Select this component when a cost-effective 8-bit solution with integrated non-volatile memory and analog capabilities is needed. The 16MHz speed grade requires a minimum supply voltage of 4.5V, distinguishing it from the lower voltage ATtiny26L variants. Consider the USI interface if dedicated I2C/SPI hardware is not available in other family members. Evaluate the 16-pin I/O count against system connectivity requirements.

Part Context

This part belongs to the ATtiny26(L) family of low-power CMOS 8-bit microcontrollers based on the AVR enhanced RISC architecture. The '16' suffix indicates the maximum operating frequency of 16 MHz, while 'SU' denotes the 20-lead Small Outline Integrated Circuit (SOIC) package. The 'R' typically signifies tape and reel packaging. It shares core architectural features with the ATtiny26L but differs in voltage and speed specifications.

Replacement Considerations

ATtiny26-16SU

FAQ

What is the function of the Universal Serial Interface (USI)?

The USI allows for efficient software implementation of TWI (Two-wire Serial Interface) or SM-bus interfaces.

How does the ATtiny26-16SUR handle power consumption?

It offers four software-selectable power-saving modes: Idle, Noise Reduction, Power-down, and Standby, allowing optimization of power versus processing speed.

What are the memory endurance specifications?

The Flash program memory has an endurance of 10,000 write/erase cycles, and the EEPROM has an endurance of 100,000 write/erase cycles.