ATTINY28V-1AC Equivalent & Substitute Parts

Part Overview

The ATTINY28V-1AC 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 functionally equivalent alternatives essential for ongoing design support, legacy system maintenance, and component procurement.

Substiute Parts

ATTINY28V-1AC

Microchip TechnologyIn Stock: 780392ATTINY28V-1AC Datasheet

Current PartRFQ

ATTINY28V-1AU

Microchip TechnologyIn Stock: 4505ATTINY28V-1AU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATTINY28V-1AC is determined by strict alignment of the following electrical and mechanical parameters:

• Core processor architecture (AVR)
• Core size (8-Bit)
• Program memory capacity (2KB FLASH)
• I/O pin count (11)
• Supply voltage range (1.8V ~ 5.5V)
• Package type and footprint (32-TQFP 7x7)
• Peripheral set (POR, WDT)
• Oscillator type (Internal)

The ATTINY28V-1AU meets all substitution criteria. Both devices share identical electrical specifications, memory configuration, I/O architecture, and physical packaging. The primary differences are packaging format (Tube vs. Tray) and operating temperature range extension, which do not affect functional compatibility in applications designed for the ATTINY28V-1AC.

Parameter Comparison

Engineering Selection Recommendations

The ATTINY28V-1AU is a direct functional substitute for the ATTINY28V-1AC. Both devices are classified as obsolete products from Microchip Technology.

The ATTINY28V-1AU offers two material advantages over the original part:

1. Extended operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C) provides broader environmental compatibility for applications requiring wider thermal operation.

2. ROHS3 compliance status improves regulatory alignment for new designs and procurement in regions with RoHS requirements, whereas the ATTINY28V-1AC is RoHS non-compliant.

Both devices maintain identical electrical performance, memory architecture, I/O configuration, and physical packaging. Selection between these parts depends on application temperature requirements and regulatory compliance mandates.

Frequently Asked Questions (FAQ)

Q: Can the ATTINY28V-1AU replace the ATTINY28V-1AC in existing designs?

A: Yes. Both devices share identical core architecture, memory configuration, I/O pin count, supply voltage range, and 32-TQFP package footprint. Direct substitution is electrically and mechanically compatible.

Q: What is the difference between the ATTINY28V-1AC and ATTINY28V-1AU?

A: The primary differences are operating temperature range (ATTINY28V-1AU extends to -40°C ~ 85°C versus 0°C ~ 70°C) and RoHS compliance status (ATTINY28V-1AU is ROHS3 compliant; ATTINY28V-1AC is non-compliant). Electrical and functional specifications are identical.

Q: Are there packaging differences between these parts?

A: Both devices use 32-TQFP (7x7) surface mount packaging with identical footprints. The packaging format designation differs (Tube vs. Tray), but this affects only handling and storage, not circuit compatibility.

Q: Why is the ATTINY28V-1AC classified as obsolete?

A: The ATTINY28V-1AC is an end-of-life product from Microchip Technology. The ATTINY28V-1AU serves as the current equivalent for ongoing component procurement and design support.

Q: Does the extended temperature range of the ATTINY28V-1AU affect performance in standard applications?

A: No. The extended temperature range represents an expanded operational envelope. Devices operating within the original 0°C ~ 70°C range experience identical performance characteristics.

Q: Are both parts pin-compatible?

A: Yes. Both devices feature 11 I/O pins in the same 32-TQFP package configuration with identical pinout.