Microchip Technology AT32UC3A4128S-C1UT

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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR®32 UC3 A4
Packaging Tray | NULL
Core Processor AVR
Core Size 32-Bit Single-Core
Speed 66MHz
Connectivity EBI/EMI, I2C, IrDA, Memory Card, SPI, SSC, UART/USART, USB OTG
Peripherals Brown-out Detect/Reset, DMA, POR, WDT
Number of I/O 88
Program Memory Size 128KB (128K x 8)
Program Memory Type FLASH
EEPROM Size -
RAM Size 128K x 8
Voltage - Supply (Vcc/Vdd) 1.75V ~ 3.6V
Data Converters A/D 8x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 100-VFBGA (7x7)
Package / Case 100-VFBGA
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Microchip AT32UC3A4128S-C1UT is a 32-bit AVR MCU running at 66MHz. It provides 128KB flash and 128KB RAM, with a supply range of 1.75V–3.6V. The 100-VFBGA package includes DMA, POR, WDT, and brown-out detection, suited for compact, power-sensitive embedded systems.

  • Compact footprint: 100-VFBGA saves board space for miniaturized designs.
  • Low power: 1.75V minimum supply extends battery life.
  • Balanced memory: Equal flash/RAM (128KB each) supports data-heavy applications.
  • Robust supervision: POR, WDT, and brown-out reset enhance reliability.

Portable Instrumentation

The 66MHz AVR core with 128KB RAM enables real-time signal analysis in handheld meters.

Wireless Sensor Nodes

Low-voltage operation (1.75V) and DMA support efficient duty-cycled sensor reading.

Industrial Networking

With 128KB flash, it can run CANopen or Modbus stacks for factory automation.

Consumer Audio Devices

DMA and PWM allow direct digital-to-analog conversion for simple audio playback.

Battery Management Systems

Brown-out detection and WDT ensure safe state monitoring in multi-cell packs.

Embedded Security Modules

The compact VFBGA package fits space-constrained cryptographic token designs.

Q: What processor core is used?
A: It uses an AVR 32-bit core running at 66MHz.
Q: What is the supply voltage range?
A: It operates from 1.75V to 3.6V.
Q: How much flash and RAM does it have?
A: It has 128KB flash and 128KB RAM.
Q: What package is available?
A: It comes in a 100-VFBGA package.
Q: Does it have a watchdog timer?
A: Yes, it includes WDT, POR, and brown-out detection.
Base Product Number : AT32UC3A4128S
100-VFBGA 128KB Flash 128KB RAM 32-bit MCU 66MHz AVR DMA Industrial Low Power Portable WDT
Q: What processor core is used?
A: It uses an AVR 32-bit core running at 66MHz.
Q: What is the supply voltage range?
A: It operates from 1.75V to 3.6V.
Q: How much flash and RAM does it have?
A: It has 128KB flash and 128KB RAM.
Q: What package is available?
A: It comes in a 100-VFBGA package.
Q: Does it have a watchdog timer?
A: Yes, it includes WDT, POR, and brown-out detection.