AT32UC3L032-D3HT Equivalent & Substitute Parts

Part Overview

The AT32UC3L032-D3HT is a 32-bit AVR microcontroller from Microchip Technology's AVR®32 UC3 L series, featuring 32KB of FLASH memory and operating at 50MHz. This device is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The AT32UC3L032-D3HT remains available in inventory (665 units), but obsolescence status necessitates evaluation of compatible alternatives for new designs and long-term supply chain planning.

Substiute Parts

AT32UC3L032-D3HT

Microchip TechnologyIn Stock: 693AT32UC3L032-D3HT Datasheet

Current PartRFQ

AT32UC3L0128-D3HT

Microchip TechnologyIn Stock: 827AT32UC3L0128-D3HT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT32UC3L032-D3HT is determined by strict alignment across the following critical parameters:

Mandatory Matching Parameters:

• Manufacturer: Microchip Technology
• Series: AVR®32 UC3 L
• Core Processor: AVR
• Core Size: 32-Bit Single-Core
• Speed: 50MHz
• Voltage Supply Range: 1.62V ~ 3.6V
• Connectivity: I2C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number of I/O: 36
• Data Converters: A/D 8x12b
• Operating Temperature: -40°C ~ 85°C (TA)
• Mounting Type: Surface Mount
• Package / Case: 48-UFLGA Exposed Pad
• Supplier Device Package: 48-TLLGA (5.5x5.5)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 3 (168 Hours)
• REACH Status: REACH Unaffected

Allowable Variation Parameters:

• Program Memory Size: May increase (backward compatible for code storage)
• RAM Size: May increase (backward compatible for data storage)
• Product Status: Active status preferred over obsolete

The AT32UC3L0128-D3HT qualifies as a direct substitute because it maintains identical electrical, mechanical, and compliance specifications while providing increased program memory (128KB vs. 32KB) and RAM (32K x 8 vs. 16K x 8). These increases represent functional enhancements without introducing incompatibility.

Parameter Comparison

Engineering Selection Recommendations

The AT32UC3L0128-D3HT is a qualified substitute for the AT32UC3L032-D3HT based on the following engineering criteria:

Compliance & Regulatory Status: Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity across supply chain transitions.

Product Lifecycle Status: The AT32UC3L0128-D3HT carries active product status with confirmed inventory availability (747 units), whereas the AT32UC3L032-D3HT is classified as obsolete. This status differential supports long-term design continuity and production planning.

Electrical & Mechanical Compatibility: All core electrical parameters, voltage specifications, operating temperature ranges, and mechanical package dimensions are identical. Pin count, I/O configuration, and peripheral functionality remain unchanged, ensuring direct PCB compatibility without layout modifications.

Memory Enhancement: The substitute device provides 4x increased FLASH memory (128KB vs. 32KB) and 2x increased RAM (32K x 8 vs. 16K x 8). These enhancements are backward compatible and do not introduce functional constraints for applications originally designed for the 32KB variant.

Frequently Asked Questions (FAQ)

Q: Can the AT32UC3L0128-D3HT be used as a direct replacement for the AT32UC3L032-D3HT without PCB modifications?

A: Yes. Both devices share identical package specifications (48-TLLGA, 5.5x5.5mm), pin configurations, and electrical operating parameters. No PCB layout changes are required for physical substitution.

Q: What are the key differences between these two microcontrollers?

A: The primary differences are program memory capacity (32KB vs. 128KB FLASH) and RAM size (16K x 8 vs. 32K x 8). All other electrical, mechanical, and functional parameters are identical.

Q: Is the increased memory in the AT32UC3L0128-D3HT backward compatible with firmware designed for the AT32UC3L032-D3HT?

A: Yes. Firmware compiled for the 32KB variant will execute on the 128KB device without modification. The additional memory capacity does not introduce incompatibility.

Q: What is the significance of the product status difference (Obsolete vs. Active)?

A: Obsolete status indicates that the AT32UC3L032-D3HT is no longer in active production and will eventually reach end-of-life. The AT32UC3L0128-D3HT's active status ensures continued manufacturing support, availability, and technical documentation updates.

Q: Are there any voltage supply or operating temperature differences between these devices?

A: No. Both devices operate across the identical voltage range (1.62V ~ 3.6V) and temperature range (-40°C ~ 85°C TA).

Q: Do both devices have the same peripheral set and connectivity options?

A: Yes. Both devices include identical connectivity (I2C, SPI, UART/USART) and peripheral features (Brown-out Detect/Reset, DMA, POR, PWM, WDT).

Q: What is the moisture sensitivity level for both devices, and what does MSL 3 mean?

A: Both devices carry MSL 3 rating with a 168-hour floor life. MSL 3 indicates that the device must be used within 168 hours of package opening under controlled humidity conditions to prevent moisture-related failures during reflow soldering.