ATTINY28V-1AI Equivalent & Substitute Parts

Part Overview

The ATTINY28V-1AI is an 8-bit AVR microcontroller from Microchip Technology's ATtiny series, featuring 2KB of FLASH program memory and operating at 1.2MHz. This device is classified as obsolete, making identification of compatible substitute parts essential for ongoing production, maintenance, and design continuity. The part is packaged in a 32-TQFP (7x7mm) surface mount configuration with supply voltage range of 1.8V to 5.5V and operating temperature range of -40°C to 85°C.

Substiute Parts

ATTINY28V-1AI

Microchip TechnologyIn Stock: 1438ATTINY28V-1AI Datasheet

Current PartRFQ

ATTINY28V-1AU

Microchip TechnologyIn Stock: 4505ATTINY28V-1AU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATTINY28V-1AI is determined by strict equivalence across the following critical parameters:

• Core Architecture: AVR processor family
• Memory Configuration: 2KB FLASH program memory (1K x 16)
• I/O Count: 11 I/O pins
• Peripheral Set: POR (Power-On Reset) and WDT (Watchdog Timer)
• Electrical Specifications: 1.8V to 5.5V supply voltage range
• Thermal Range: -40°C to 85°C operating temperature
• Package Footprint: 32-TQFP (7x7mm) surface mount

The ATTINY28V-1AU meets all these criteria and is identified as a direct substitute. Both parts share identical core functionality, memory architecture, I/O configuration, and thermal specifications. The primary difference lies in packaging format and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The ATTINY28V-1AU is a direct functional equivalent to the ATTINY28V-1AI. Both parts are classified as obsolete and share identical electrical, thermal, and mechanical specifications. The key distinction is regulatory compliance: the ATTINY28V-1AU achieves ROHS3 compliance, whereas the ATTINY28V-1AI is RoHS non-compliant. For applications subject to RoHS directives or environmental regulations, the ATTINY28V-1AU is the appropriate selection. Both parts maintain equivalent moisture sensitivity levels and REACH status. Component selection should be based on regulatory requirements and packaging format availability (tray packaging for the substitute part).

Frequently Asked Questions (FAQ)

Q: Are ATTINY28V-1AI and ATTINY28V-1AU pin-compatible?

A: Yes. Both parts use the 32-TQFP (7x7mm) package with identical pin assignments, I/O configuration (11 pins), and electrical characteristics. Direct PCB substitution is possible without layout modifications.

Q: What is the difference between these two part numbers?

A: The primary differences are packaging format and RoHS compliance status. The ATTINY28V-1AU is supplied in tray packaging and meets ROHS3 compliance requirements, while the ATTINY28V-1AI is RoHS non-compliant. Functionally and electrically, both parts are identical.

Q: Can I use ATTINY28V-1AU in place of ATTINY28V-1AI in existing designs?

A: Yes, provided that regulatory compliance requirements do not prohibit the use of RoHS non-compliant components. The ATTINY28V-1AU offers improved compliance status and is functionally equivalent across all specified parameters.

Q: Are there any thermal or electrical differences between these parts?

A: No. Both parts operate across the identical voltage range (1.8V to 5.5V), temperature range (-40°C to 85°C), and feature the same internal oscillator, memory configuration, and peripheral set.

Q: What is the moisture sensitivity level for these parts?

A: Both the ATTINY28V-1AI and ATTINY28V-1AU have a Moisture Sensitivity Level (MSL) of 3, with a floor life of 168 hours. Standard moisture control procedures apply during storage and handling.