ATMEGA64M1-15AD - 8-bit AVR MCU 64KB Flash 16MHz | Microchip
MPN: ATMEGA64M1-15AD β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.9 | $6.90 |
| 10 | $6.21 | $62.10 |
| 100 | $5.52 | $552.00 |
| 500 | $4.97 | $2,485.00 |
| 1,000 | $4.45 | $4,450.00 |
ATMEGA64M1-15AD Overview
An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, positioned within the power-management and embedded-control hierarchy as a complete system-on-chip: CPU, program memory, data memory, peripherals, and I/O integrated in a single IC. The ATmega M1/C1 family extends the standard ATmega line with motor-control and automotive connectivity peripherals targeted at in-vehicle embedded nodes.
Key features of the ATMEGA64M1-15AD include 64 KB self-programmable ISP Flash, 2 KB on-chip EEPROM for parameter storage, 4 KB internal SRAM, 32 general purpose working registers, and 27 general purpose I/O lines in this package option. The part integrates a motor-control peripheral set and LIN/ CAN-class communication capability that distinguishes the M1 family from generic ATmega64 devices.
Architecturally, the AVR core couples a single-cycle ALU with fast-register file access, achieving up to 16 MIPS throughput at 16 MHz. Read-while-write Flash allows firmware updates in the field without stalling execution, supporting bootloader-based OTA or diagnostic update strategies common in automotive ECUs. The A temperature grade suffix (-15AD) qualifies the device for extended ambient conditions demanded by under-hood and near-engine placements.
Typical applications include automotive body-control modules, LIN-bus mechatronic nodes, DC motor and blower control units, HVAC actuators, and industrial motor drives where a 5 V supply rail and high junction temperature rating are required.
Design consideration: the 4.5 V to 5.5 V supply window means the part must be powered from a regulated 5 V rail (typically from a vehicle 12 V bus via a pre-regulator), and the 150 degrees C rating must be reconciled with package thermal resistance in the PCB stackup.
This page synthesizes verified distributor data, drop-in alternatives, pricing tiers, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA64M1-15AD β 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 ATMEGA64M1-15AD (same form factor and footprint) β differing in ADC, SRAM, Package, Flash Memory, EEPROM.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA64C1-15AD
β Drop-Inβ In Stock
$3.4 / Unit
View Datasheet βATMEGA64C1-15AZ
β Drop-Inβ In Stock
$4.06 / Unit
View Datasheet βATMEGA32M1-15AZ
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA64M1-AU
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$4.16 / Unit
View Datasheet βATMEGA32M1-AU
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$4.98 / Unit
View Datasheet βATMEGA32C1-15AZ
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$2.95 / Unit
View Datasheet βATMEGA64M1-15AD Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR RISC |
| Flash Program Memory | 64 KB (32K x 16), ISP, read-while-write |
| EEPROM | 2 KB |
| SRAM | 4 KB |
| Maximum Clock Frequency | 16 MHz |
| Supply Voltage Range | 4.5 V to 5.5 V |
| General Purpose I/O | 27 I/O lines (32-TQFP package) |
| General Purpose Working Registers | 32 |
| Data Bus Width | 8 bit |
| Package | 32-TQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature Grade | Automotive, up to +150 degrees C |
| Number of I/O Ports | 53 (device total, per datasheet) |
| Life Cycle Stage | ACTIVE |
| Special Peripherals | Motor control peripheral set (M1 family) |
ATMEGA64M1-15AD 32-tqfp (7x7 mm) Pin Configuration Guide
Pin configuration for ATMEGA64M1-15AD (32-tqfp (7x7 mm) 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 ATMEGA64M1-15AD.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA64M1-15AD is suitable for 6 applications: Automotive Body Control Modules, DC Motor and Blower Control, LIN Bus Mechatronic Nodes, HVAC Actuator Control Units, Automotive Lighting Modules, Industrial 5V Motor Drives.
Automotive Body Control Modules
The ATMEGA64M1-15AD fits automotive body-control modules because its 150 degrees C automotive temperature rating, 64 KB ISP Flash with read-while-write, and 4.5 V to 5.5 V supply window align directly with the requirements of in-vehicle electronic control units placed in harsh thermal environments. In this application the MCU runs diagnostic and load-management firmware from internal Flash, stores calibration parameters in the 2 KB EEPROM, and drives relays, lamps, and motors through the integrated motor-control peripheral set and 27 GPIO lines. Placed on a 5 V rail derived from the vehicle KL30 bus through a pre-regulator, the device delivers deterministic 8-bit RISC performance of up to 16 MIPS at 16 MHz, sufficient for LIN-scheduled task execution. The trade-off versus a 32-bit automotive MCU is lower compute headroom, but the AVR architecture, single-voltage 5 V operation, and proven family documentation reduce qualification effort.
Recommended
DC Motor and Blower Control
The ATMEGA64M1-15AD is purpose-built for DC motor and blower control thanks to the M1 family motor-control peripheral set, which provides PWM generation and sensor interfacing without external controllers. With 64 KB Flash for closed-loop control firmware and field-oriented or trapezoidal algorithms, 4 KB SRAM for state variables, and a 16 MHz AVR core executing single-cycle instructions, the device can run fast PWM control loops for HVAC blowers, fuel pumps, and cooling fans. The 150 degrees C rating allows mounting near heat-generating motors where industrial-grade parts would derate. Used with external MOSFET half-bridge drivers, the MCU outputs PWM from its timer peripherals while reading current-sense and position feedback through its ADC channels. A practical benefit is self-programmable Flash enabling firmware-parameter updates in the field; the constraint is the 4.5 V to 5.5 V supply, which mandates a regulated 5 V rail in 12 V vehicular systems.
Recommended
LIN Bus Mechatronic Nodes
For LIN-bus mechatronic nodes such as window lifts, wiper systems, and seat adjusters, the ATMEGA64M1-15AD offers an optimal mix of memory and peripherals: 64 KB Flash accommodates the LIN protocol stack plus application logic with headroom, 2 KB EEPROM stores node configuration and learned positions, and the 27 GPIO lines interface directly to limit switches and motor drivers. The automotive 150 degrees C grade and 5 V operation integrate cleanly with standard LIN transceivers, which are typically powered from the same 5 V rail. In a typical node, the MCU services the LIN schedule table via interrupt-driven UART-class communication while running PWM motor control in the background; the 16 MIPS throughput at 16 MHz leaves comfortable timing margin. Compared with smaller ATmega parts, the 64 KB memory eliminates external storage, reducing BOM cost and failure points in sealed mechatronic assemblies.
Recommended
HVAC Actuator Control Units
The ATMEGA64M1-15AD suits HVAC actuator control units - flap servos, blend-door motors, and damper drives - because these applications demand motor-control PWM, position-feedback sampling, and wide temperature tolerance in one device. The 64 KB Flash holds the actuator control, stall-detection, and diagnostics firmware; the 2 KB EEPROM retains end-stop calibration positions across power cycles, a critical requirement for flap actuators. With the AVR core at 16 MHz, position-loop sampling at several hundred hertz is easily achieved while PWM outputs drive the DC actuator motor through an H-bridge. The 150 degrees C automotive grade tolerates the temperature extremes inside HVAC plenum areas that would exceed the limits of commercial-grade MCUs. Design attention should focus on thermal management: Estimated: junction rise equals package theta-JA times device dissipation, so adequate PCB copper under the TQFP-32 thermal pad region is recommended per Microchip layout guidance.
Recommended
Automotive Lighting Modules
In automotive lighting modules such as LED headlamp drivers and adaptive lighting controllers, the ATMEGA64M1-15AD contributes its 64 KB Flash for dimming curves and diagnostic routines, the motor-control-grade PWM timers for precise LED current regulation, and the 150 degrees C rating required for lamp housings where ambient temperatures regularly exceed 105 degrees C. The MCU's EEPROM stores failure logs and trim data, while its ADC monitors current-sense shunts for open/short detection demanded by automotive lighting standards. Operating at 16 MHz, the AVR core executes heartbeat supervision, LIN communication, and PWM generation concurrently with adequate margin. The 5 V supply interfaces directly to gate-driver ICs that level-shift to the LED string. A practical consideration is EMC: switching LED drivers produce conducted noise, so the MCU's supply pin needs local 100 nF plus bulk decoupling, and PWM outputs should be filtered or slew-limited per Microchip EMC application guidance.
Recommended
Industrial 5V Motor Drives
Beyond automotive, the ATMEGA64M1-15AD serves industrial 5 V motor-drive applications - pumps, conveyors, and small servo drives - where its 64 KB Flash supports sensorless commutation algorithms and the M1 motor-control peripherals generate complementary PWM outputs with dead-time control. The AVR single-cycle RISC core at 16 MHz provides approximately 16 MIPS, sufficient for current-loop closure on low-inductance motors at moderate PWM frequencies. The 4 KB SRAM holds filtering buffers and control state, while 2 KB EEPROM retains drive parameter sets for multiple product configurations. Although the automotive temperature grade exceeds industrial requirements, that headroom improves reliability margins in enclosed drive enclosures with limited airflow. Compared with generic ATmega64 parts, the integrated motor-control timers eliminate the need for external PWM coprocessors, reducing board area. Constraint: the 4.5 V to 5.5 V supply requires a dedicated 5 V regulator, and I/O is not 3.3 V logic-compatible without level shifting.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA64M1-15AD β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA64C1-15AD | ATMEGA64C1-15AZ | ATMEGA32M1-15AZ | ATMEGA64M1-AU |
|---|---|---|---|---|---|
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 64 KB | 64 KB | 64 KB | 32 KB | 64 KB |
| Maximum Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Temperature Grade | Automotive, up to +150 C | Automotive, up to +150 C | Automotive grade (verify exact limit) | Automotive grade (verify exact limit) | Industrial (-40 C to +85 C) |
| Peripheral Emphasis | Motor control (M1) | Connectivity (C1) | Connectivity (C1) | Motor control (M1) | Motor control (M1) |
| Lifecycle Status | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE |
Key Differentiators
- Automotive 150 degrees C temperature grade (vs ATMEGA64M1-AU)
- Dedicated motor-control peripheral set (vs ATMEGA64C1-15AD)
- Double the program memory of the 32M1 sibling (vs ATMEGA32M1-15AZ)
Design Notes
The ATMEGA64M1-15AD requires a regulated 4.5 V to 5.5 V supply. In automotive 12 V systems, derive the 5 V rail with a pre-regulator (buck converter or automotive LDO such as a Microchip ATA series system-basis chip) and place a 100 nF ceramic capacitor within a few millimeters of each VCC pin, plus 4.7-10 uF bulk capacitance at the board entry point. Never drive the MCU from the raw KL30 bus. Verify that regulator droop during cold crank stays above 4.5 V, or add bulk hold-up capacitance to prevent brown-out resets during engine start events.
The automotive 150 degrees C rating is an ambient/temperature-grade ceiling, not an invitation to ignore self-heating. Estimated: junction temperature equals ambient plus (theta_JA x device power dissipation); with the TQFP-32 7x7 mm package and typical active currents of a few tens of milliamps at 5.5 V, self-heating is modest, but at sustained high-frequency operation near 16 MHz with heavily loaded GPIO, verify junction temperature with the datasheet theta_JA and your PCB copper area. Use solid ground pour under the package and thermal vias to improve heat spreading in sealed, high-ambient enclosures.
Two frequent mistakes with the M1 family: (1) assuming generic ATmega64 code ports without change - the M1 peripheral map differs from the standard ATmega64, so motor-control and communication register definitions must be updated; consult the ATmega16M1/32M1/32C1/64M1/64C1 shared datasheet rather than the generic ATmega64 manual. (2) Confusing suffixes: the '-15AD' automotive 150 degrees C grade differs from the '-AU' industrial part in temperature rating, so substitution in under-hood designs with an AU part is not acceptable. Also respect the Appendix A absolute maximum per-pin DC current limits when driving loads directly from GPIO.
Compliance Information
Mouser listing describes the ATMEGA64M1-15AD as 'Green', suggesting lead-free/green packaging, but explicit RoHS/REACH/lead-free certification status was not present in the verified web data and must be confirmed on the Microchip product page.
