ATMEGA64-16MC - 8-Bit AVR MCU 64KB Flash 16MHz QFN-64 | Microchip
MPN: ATMEGA64-16MC ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.9 | $6.90 |
| 10 | $6.25 | $62.50 |
| 100 | $5.55 | $555.00 |
| 500 | $5.1 | $2,550.00 |
| 1,000 | $4.65 | $4,650.00 |
ATMEGA64-16MC Overview
An 8-bit microcontroller is a single-chip computer whose CPU processes data in 8-bit words, integrating program memory, data memory, timers, communication peripherals and analog converters on one silicon die. Within the product hierarchy, the ATMEGA64 belongs to the AVR ATmega family, which sits under the AVR MCU line, under the broader microcontroller (MCU) and semiconductor categories. MCUs of this class serve as the main embedded controller in countless industrial, consumer and instrumentation designs.
Key features include the Advanced RISC architecture with 130 powerful instructions, most executed in a single clock cycle, plus 32 general-purpose working registers. The device integrates an 8-channel 10-bit ADC, a JTAG interface for on-chip debugging and boundary-scan, multiple timers with PWM channels, a hardware USART, SPI and TWI (I2C) serial interfaces, an analog comparator, a watchdog timer (WDT) and brown-out detect/reset. Self-programming Flash enables bootloader-based firmware updates in the field.
Technically, the AVR core achieves near one MIPS per MHz by fetching an instruction while executing the previous one through a two-stage pipeline, letting designers trade clock speed directly against power consumption. Operating from a 4.5V to 5.5V supply (the '-16' speed grade), the MCU suits 5V industrial logic levels. Flash endurance is rated for 10,000 write/erase cycles with independent lock bits for code security.
Typical applications include industrial control systems, building automation and HVAC controllers, test and measurement instrumentation, and motor-control or power-management nodes where a 5V-tolerant, ADC-equipped 8-bit MCU is required. The MLF/QFN package saves board area versus the TQFP-64 version while improving thermal performance through the exposed die-attach pad.
A key design consideration: hand-soldering the MLF package is difficult because the ground pad and fine-pitch perimeter lands are underneath the body, so plan reflow assembly and a solid via-fan under the exposed pad for both grounding and heat spreading.
This page synthesizes distributor pricing, drop-in alternatives, comparison data, and practical design notes not found in the manufacturer datasheet, with all data verified as of 2026-09-18.
Drop-in alternatives for ATMEGA64-16MC — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATMEGA64-16MC (same form factor and footprint) — differing in Package, Core Architecture, EEPROM Size, Max Clock Frequency, Operating Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA64-16MU
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →ATMEGA64-16ML
✅ Drop-In📋 Reference alternative (not in catalog)
ATMEGA64A-MU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.24 / Unit
View Datasheet →ATMEGA64L-8MU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$3.72 / Unit
View Datasheet →ATMEGA64-16MC Maximum Ratings & Electrical Characteristics
| Core Architecture | AVR 8-bit RISC |
| Flash Program Memory | 64 KB (32K x 16) |
| SRAM | 4 KB |
| EEPROM | 2 KB |
| Maximum Clock Frequency | 16 MHz |
| Throughput | Up to 16 MIPS at 16 MHz |
| Instructions | 130 instructions, most single-cycle |
| Operating Voltage | 4.5 V to 5.5 V |
| ADC | 8-channel 10-bit |
| Debug Interface | JTAG (on-chip debug and boundary scan) |
| Serial Interfaces | USART, SPI, TWI (I2C) |
| Timers | Multiple timers with PWM, WDT |
| Brown-out Detect/Reset | Yes |
| Package | 64-QFN (9x9 mm) MLF, exposed pad |
| Mounting Type | Surface Mount |
| Temperature Grade | Commercial (0C to 70C) |
| Flash Endurance | 10,000 write/erase cycles |
ATMEGA64-16MC 64-qfn (9x9 mm) mlf, exposed pad Pin Configuration Guide
Pin configuration for ATMEGA64-16MC (64-qfn (9x9 mm) mlf, exposed pad package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATMEGA64-16MC.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA64-16MC is suitable for 6 applications: Industrial Control Systems, Building Automation and HVAC, Test and Measurement Instrumentation, Motor Control and Actuator Drivers, Embedded Networking Nodes and Gateways, Prototyping and Legacy Design Maintenance.
Industrial Control Systems
The ATMEGA64-16MC suits industrial controllers because its 4.5V to 5.5V operating range aligns directly with 5V industrial logic, and its 8-channel 10-bit ADC digitizes sensor inputs such as potentiometers, pressure and level transducers without an external converter. Peripherals including USART, SPI and TWI connect to HMIs, RS-485 adapters and EEPROM configuration storage, while PWM-capable timers drive actuators and SSRs. The watchdog timer and brown-out detect/reset provide autonomous fault recovery required in unattended equipment. Note that the MC suffix is a commercial 0C to 70C grade; industrial-temperature deployments should select the MI variant of the same family.
Recommended
Building Automation and HVAC
In HVAC and building automation boards, the ATMEGA64-16MC acts as the zone controller: its 64KB self-programming Flash holds protocol stacks (Modbus over USART, BACnet-lite) with room for bootloader field updates, while 4KB SRAM buffers network traffic and 2KB EEPROM stores setpoints and calibration across power cycles. The 10-bit ADC reads NTC thermistors and humidity channels, and TWI interfaces to RTC and display drivers. The 16MHz core delivers up to 16 MIPS, ample for multi-loop PID at millisecond rates, and the MLF-64 package gives 40+ GPIO for relay and damper drive logic.
Recommended
Test and Measurement Instrumentation
The JTAG on-chip debug interface makes the ATMEGA64-16MC attractive for instrumentation, since firmware can be single-stepped and memory inspected in-circuit during calibration and certification. The 8-channel 10-bit ADC handles front-panel and telemetry inputs, USART streams results to a PC, and SPI clocks external precision ADCs or DACs where 10-bit resolution is insufficient. With 64KB Flash there is headroom for menu systems, logging and self-test code, and the 130-instruction single-cycle RISC core keeps measurement loops deterministic. Commercial 0C to 70C grading suits benchtop and indoor instruments.
Recommended
Motor Control and Actuator Drivers
The ATMEGA64-16MC drives DC and stepper motors using its PWM timer outputs for H-bridge and driver-stage control. The 16MHz/16 MIPS RISC core executes commutation and PID loops with single-cycle execution, the 10-bit ADC samples current-sense shunts and back-EMF for closed-loop control, and external interrupts capture encoder quadrature signals. Brown-out reset prevents corrupt PWM states during supply dips, protecting power stages. The 5V I/O directly gates MOSFET driver ICs typical in 24V industrial drives; for higher memory or CAN buses, the ATmega640 family offers a pin-compatible upgrade path within the same AVR ecosystem.
Recommended
Embedded Networking Nodes and Gateways
With USART, SPI and TWI serial engines plus 64KB program memory, the ATMEGA64-16MC serves as a protocol-translation node, for example bridging Modbus RTU on USART to SPI-attached Ethernet or RF modules. The 4KB SRAM holds packet buffers and state machines, the 2KB EEPROM retains node addresses and network configuration without external NVRAM, and the self-programming Flash supports remote firmware upgrade via bootloader, which reduces truck rolls in installed base maintenance. Throughput of one MIPS per MHz keeps interrupt latency low for time-slotted polling schemes, and the watchdog provides autonomous recovery from fieldbus lockups.
Recommended
Prototyping and Legacy Design Maintenance
For engineers maintaining legacy Atmel-era designs or prototyping large-AVR systems, the ATMEGA64-16MC remains actively stocked (DigiKey lists ships-today availability as of 2026-09-18) and is supported by the open-source MegaCore Arduino hardware package, enabling Arduino IDE development over ISP or JTAG. The 64-pin MLF footprint matches ATMEGA64-16MU/ML parts, so designers can second-source within the same land pattern, and the ATmega64A successor offers a drop-in die refresh. The JTAG port further allows boundary-scan test of assembled boards, valuable for contract-manufacture quality assurance.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA64-16MC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA64-16MU | ATMEGA64-16ML | ATMEGA64A-MU | ATMEGA64L-8MU |
|---|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) MLF | 64-QFN (9x9 mm) MLF - same | 64-QFN (9x9 mm) MLF - same | 64-QFN (9x9 mm) MLF - same | 64-QFN (9x9 mm) MLF - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| Max Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 8 MHz |
| Operating Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 2.7 V to 5.5 V |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Throughput | Up to 16 MIPS | Up to 16 MIPS | Up to 16 MIPS | Up to 16 MIPS | Up to 8 MIPS |
Key Differentiators
- 16MHz operation with full 64KB Flash (vs ATMEGA64L-8MU)
- Exposed-pad MLF package saves board area and improves grounding (vs ATMEGA64-16AU)
- Original-die availability versus successor (vs ATMEGA64A-MU)
Design Notes
The MLF (exposed-pad) package requires the central die-attach pad to be soldered to a copper pour on the PCB. Create a via fan-out array (typically 4 to 9 vias) under the pad to tie it to the ground plane: this pad is the primary ground connection and heat-removal path for the 64-QFN (9x9 mm) body. Reflow assembly is essentially mandatory; hand rework of the perimeter lands and hidden pad requires hot-air tooling and practice. Follow the MLF land-pattern drawing in the ATmega64 datasheet for pad dimensions.
The '-16' speed grade requires a 4.5V to 5.5V supply; do not attempt 3.3V operation at 16MHz, as this is outside the datasheet's speed-vs-voltage operating envelope (low-voltage operation belongs to the 'L' 8MHz grades). Decouple every VCC pin with a 100nF ceramic capacitor placed within a few millimeters of the pin, plus bulk capacitance near the regulator. Enable brown-out detection in the fuses so the MCU resets cleanly rather than corrupting EEPROM during supply sag.
Set fuse bits deliberately: disabling JTAG via the JTD fuse bit requires writing the bit twice within four cycles per the datasheet, a frequent source of confusion. Verify lock-bit configuration before shipping, since JTAG exposes Flash contents when enabled. When substituting the ATmega64A successor die, review Microchip's migration/errata documentation, as minor analog and timing differences exist versus the original ATmega64. EEPROM writes during brown-out are the most common field-failure cause; gate writes on a brown-out-status check.
Keep the crystal or external clock traces short and guarded by ground, since the AVR's XTL input is sensitive to coupling at 16MHz. For the 10-bit ADC, dedicate an analog ground island connected to the main ground at a single point and filter AVCC with an LC network (for example 10uH plus 100nF) as shown in the datasheet's ADC noise-reduction section; this measurably reduces switching-noise coupling from the digital core and PWM outputs.
Compliance Information
Compliance status was not stated in the verified web data; the ML suffix variant (ATMEGA64-16ML) historically denotes lead-free/Pb-free plating. Confirm RoHS/REACH certificates with Microchip or the distributor before order.
