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ATMEGA128A-AU

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ATMEGA128A-AU is a high-performance 8-bit AVR RISC microcontroller from Microchip featuring 128 KB of in-system programmable Flash, 4 KB SRAM, and 4 KB EEPROM. The device delivers up to 16 MIPS throughput at 16 MHz and integrates a rich peripheral set including 8-channel 10-bit ADC, two USARTs, SPI, I²C (TWI), and JTAG for on-chip debugging. With 53 general-purpose I/O lines, four flexible timer/counters with PWM, and a programmable watchdog timer, it supports a wide 2.7 V to 5.5 V operating range. Packaged in a 64-pin TQFP, it operates from -40 °C to +85 °C.

Stock & Date Code

Brand	Part Number	Qty	D/C	Note
Microchip	ATMEGA128A-AU	9,800	26+	8-bit Microcontroller stock for RFQ and production sourcing

Listed stock and date code are subject to final RFQ confirmation.

MCU / Processor Specifications

Parameter	Value / Specification
Exact Part Number	ATMEGA128A-AU
Manufacturer	Microchip Technology
Product Category	8-bit Microcontroller
Core / Architecture	AVR 8-bit RISC Harvard architecture with 32 × 8 general-purpose registers
Clock Frequency	Up to 16 MHz, near 1 MIPS/MHz throughput
Memory	128 KB Flash (ISP, read-while-write), 4 KB SRAM, 4 KB EEPROM
Interfaces	2× USART, SPI, I²C (TWI), JTAG (IEEE 1149.1) for on-chip debug and programming
Analog Peripherals	8-channel 10-bit ADC with optional differential input and programmable gain stage, 1× analog comparator
Supply Voltage / Operating	2.7 V to 5.5 V, 6 software-selectable power-saving modes
Operating Temperature	-40 °C to +85 °C
Package / Case	TQFP-64 (14 × 14 mm SMT, Tray)
Package / Orderable Variant	TQFP-64 (14 × 14 mm SMT, Tray); exact suffix ATMEGA128A AU

Embedded Processor Features & Applications

128 KB in-system programmable Flash with read-while-write capability, plus 4 KB SRAM and 4 KB EEPROM for data logging
AVR 8-bit RISC core delivering up to 16 MIPS at 16 MHz with 32 general-purpose working registers
Rich communication interfaces: 2× programmable USART, SPI, I²C/TWI, and IEEE 1149.1 JTAG for boundary-scan and on-chip debugging
8-channel 10-bit ADC with optional differential input mode and programmable gain amplifier, plus analog comparator
Four flexible timer/counters with compare and PWM modes, two 8-bit and two 16-bit, plus real-time counter with separate oscillator
53 programmable I/O lines, internal calibrated RC oscillator, and 6 software-selectable power-saving modes for battery-powered designs
TQFP-64 package (14 × 14 mm), 2.7–5.5V supply, -40 °C to +85 °C industrial temperature range

Why Embedded Teams Source ATMEGA128A-AU

ATMEGA128A-AU is best treated as a sourcing-specific line item, not a generic replacement, because exact suffix, package, lifecycle status and traceable supply can affect approval. The practical RFQ check is whether exact suffix, package, lifecycle status and traceable supply, date code and package/case align with the buyer's board or repair demand. Useful for 8-bit Microcontroller designs where exact ordering code, package and life-cycle status are qualified.

LimChip can confirm current price, quantity, date code, batch condition and shipping schedule by RFQ.

MCU / Processor Sourcing Checklist

Confirm exact suffix, package, memory option and temperature grade.
Check firmware, boot mode, peripheral compatibility and lifecycle status.
Verify quantity, traceability and 26+ for production or repair demand.

5,000 listed as spot stock for ATMEGA128A-AU demand; confirm current allocation and lead time by RFQ.

Need Price & Availability for ATMEGA128A-AU?

LimChip can confirm current price, quantity, date code, batch condition and shipping schedule by RFQ.

Listed stock is subject to final RFQ confirmation.

For faster RFQ confirmation, please include:

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Target date code
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Quality, Shipping & Payment

Commercial and shipment details for ATMEGA128A-AU are confirmed with the formal quotation.

Quality Confirmation

Date code, batch, package, label and marking details are checked before shipment. Inspection photos and third-party inspection support are available when required.

Shipping

LimChip supports worldwide delivery through established logistics providers. Carrier, lead time, tracking and buyer-appointed freight-forwarder requirements are confirmed by our sales team.

Payment

Payment method, currency and trade terms are confirmed in the formal quotation or proforma invoice. Contact our sales team for the options available for your order.

Frequently Asked Questions

Is ATMEGA128A-AU available from LimChip?

LimChip can confirm current availability, price, quantity, date code and lead time for ATMEGA128A-AU by RFQ.

What should buyers check before ordering ATMEGA128A-AU?

Buyers should check exact suffix, package, memory option, firmware compatibility and lifecycle status for ATMEGA128A-AU, together with live stock and traceable supply.

How do I request a quote for ATMEGA128A-AU?

Use the RFQ button and include required quantity, target date code, package/case requirement, delivery country, company name and contact details.