ATMEGA64C1-15MD - 64KB AVR MCU, LIN, 16MHz, AEC-Q100 | Microchip
MPN: ATMEGA64C1-15MD β Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATMEGA64C1-15MD Overview
An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, combining a program memory (Flash), data SRAM, EEPROM, and peripherals on one die. Within the power-management hierarchy of an electronic control unit (ECU), the MCU sits above discrete drivers and sensors, coordinating CAN/LIN communication, analog acquisition, and actuator control. The ATmega C1 family is a specialized automotive variant of the classic ATmega core, adding LIN-bus and motor-control-oriented peripherals.
Key features include 64 KB self-programmable ISP Flash with read-while-write support, 27 general-purpose I/O lines, 32 general-purpose working registers, two flexible 16-bit timer/counters with compare modes and PWM channels, and a dedicated PSC (Programmable Sequential Controller) style peripheral set for motor control in the C1 family. An 11-channel 10-bit ADC with two differential programmable-gain inputs supports sensor interfacing, while a UART with hardware LIN (Local Interconnect Network) 2.x support targets in-vehicle body and powertrain networking.
The AVR core achieves close to 1 MIPS per MHz throughput, allowing designers to run at lower clock speeds to reduce EMI and power consumption in automotive environments. Brown-out detection, an internal RC oscillator, power-on reset, and enhanced watchdog features improve system robustness for safety-relevant loads, and in-system programming plus bootloader support enables field firmware updates.
Typical applications include LIN-controlled body modules (window lifters, wipers, seat controllers), small DC motor and BLDC control nodes, HVAC flap actuators, automotive lighting modules, and industrial pumps and fans where an AEC-Q100 part with LIN is preferred.
When designing with the ATMEGA64C1-15MD, budget the ADC sampling against the PWM load of the PSC peripherals, and use the exposed pad as the primary ground connection to minimize ground bounce at 16 MHz.
This page consolidates verified distributor data, drop-in family alternatives, pricing-availability signals, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA64C1-15MD 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 ATMEGA64C1-15MD (same form factor and footprint) β differing in Package, EEPROM, SRAM, ADC, Mounting Type.
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No drop-in alternatives available for this product.
Request AlternativesATMEGA64C1-15MD Maximum Ratings & Electrical Characteristics
| Core | 8-bit AVR RISC |
| Flash Memory | 64 KB ISP Flash (read-while-write) |
| EEPROM | 2 KB |
| SRAM | 4 KB |
| Maximum CPU Frequency | 16 MHz |
| Operating Voltage | 5 V |
| General Purpose I/O | 27 I/O lines |
| Working Registers | 32 general purpose registers |
| Timer/Counters | 2 flexible timer/counters with compare modes and PWM |
| Communication Interfaces | 1 UART with hardware LIN |
| ADC | 11-channel 10-bit with 2 differential programmable gain inputs |
| Package | 32-VQFN with exposed pad |
| Temperature Grade | Grade 150 (up to +150C) |
| Qualification | AEC-Q100 (Automotive) |
| Mounting Type | Surface Mount |
| Application Segment | Automotive |
| Programming | In-System Programmable (ISP), self-programming with bootloader |
ATMEGA64C1-15MD 32-vqfn with exposed pad Pin Configuration Guide
Pin configuration for ATMEGA64C1-15MD (32-vqfn with 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 ATMEGA64C1-15MD.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA64C1-15MD is suitable for 6 applications: LIN Body Control Modules, Small BLDC and DC Motor Control, Automotive HVAC Actuators, Automotive LED Lighting Modules, Industrial Pumps and Fans, Sensor Nodes and Data Acquisition.
LIN Body Control Modules
The ATMEGA64C1-15MD is purpose-built for LIN-networked body electronics such as window lifters, wiper controllers, seat adjusters, and mirror modules. Its UART with hardware LIN 2.x support offloads protocol handling from software, while the 11-channel 10-bit ADC reads switch matrices, position sensors, and current shunts with programmable differential gain for motor current monitoring. AEC-Q100 qualification and the Grade 150 rating (up to +150C) tolerate under-hood-adjacent and enclosed actuator environments. The 64 KB Flash leaves generous headroom for diagnostic layers (UDS-over-LIN style code) plus a bootloader for field updates, and 27 GPIO directly drive relays and H-bridges through external drivers, minimizing external glue logic in cost-sensitive body nodes.
Recommended
Small BLDC and DC Motor Control
For fans, pumps, and flap actuators, the ATMEGA64C1-15MD provides two flexible timer/counters with compare modes and PWM outputs that generate the complementary gate drive sequences for three-phase or brushed motor control, while the differential programmable-gain ADC channels digitize shunt current for closed-loop speed and torque regulation. Running at 16 MHz, the AVR core delivers roughly 16 MIPS of control-loop bandwidth, sufficient for sensorless trapezoidal BLDC commutation. The Grade 150 temperature rating allows mounting near thermally stressed motor assemblies, and the 32-VQFN exposed pad grounds the die solidly to suppress PWM-induced ground bounce. When six-step drive complexity grows, the same-footprint ATMEGA64M1-15MD with a dedicated PSC becomes the natural migration path.
Recommended
Automotive HVAC Actuators
HVAC flap position control benefits directly from this MCU's blend of peripherals: the 10-bit ADC reads position feedback potentiometers across 11 channels, timer PWM drives DC flap motors with proportional control, and the LIN UART connects the node to the climate controller on a single wire. The 64 KB Flash accommodates position calibration tables stored in the 2 KB EEPROM, preserving end-stop learning data across power cycles. AEC-Q100 qualification and Grade 150 capability cover the dashboard-to-plenum temperature range where actuators are mounted. Firmware can implement soft-start and stall-detection current signatures via the differential gain inputs, reducing warranty returns, and in-system programming lets tier-one suppliers flash variants of one PCB design for different vehicle platforms.
Recommended
Automotive LED Lighting Modules
Interior and exterior LED modules - daytime running lights, ambient lighting stripes, and indicator lamps - need PWM dimming, thermal fault handling, and bus control, all native strengths of the ATMEGA64C1-15MD. Timer compare outputs generate glitch-free PWM dimming from DC up into the kHz range to eliminate visible flicker, and the ADC monitors both LED current shunts and on-board NTC temperature sensors through its 11 channels. If junction temperature approaches limits, firmware derates brightness gracefully rather than latching off. Hardware LIN allows light modules to join the body network without a separate transceiver controller, and Grade 150 rating plus AEC-Q100 qualification covers sealed lamp housings. The 64 KB Flash supports advanced effects such as adaptive welcome sequences and failure-mode diagnostics.
Recommended
Industrial Pumps and Fans
Although automotive-qualified, the ATMEGA64C1-15MD transfers well to industrial fan and pump controllers that value its robustness margin: 5V operation with industrial noise immunity, 150C-rated silicon, and a watchdog plus brown-out detection for unattended reliability. The PWM timers drive three-phase inverters for EC (electronically commutated) fans, while the differential ADC channels measure bus current and back-EMF for sensorless speed regulation. A UART can bridge to RS-485 transceivers for building-management connectivity where LIN is replaced. The 64 KB self-programmable Flash enables field firmware updates over the communication link, an important serviceability feature for ceiling-mounted or sealed installations, and 2 KB EEPROM stores operating-hour counters and fault logs for predictive maintenance analytics.
Recommended
Sensor Nodes and Data Acquisition
The 11-channel 10-bit ADC with two differential programmable-gain inputs makes the ATMEGA64C1-15MD a compact analog acquisition node for pressure, temperature, and position sensor arrays in automotive and industrial settings. Differential gain settings amplify small sensor signals (thermocouple-bridge or shunt-level) ahead of conversion, improving effective resolution without external instrumentation amplifiers in cost-sensitive designs. Sampled data buffers in the 4 KB SRAM stream out over the LIN or standard UART, and the 2 KB EEPROM locally calibrates each channel with per-unit offset and gain factors. The 16 MHz core also performs filtering - moving average or simple IIR - before transmission, reducing bus load. AEC-Q100 qualification gives reliability headroom in vibration- and temperature-stressed enclosures.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA64C1-15MD β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA64M1-15MD | ATMEGA64C1-15AD | ATMEGA32C1-15AZ | ATMEGA16C1-15MD | ATMEGA32M1-15AZ |
|---|---|---|---|---|---|---|
| Package | 32-VQFN (exposed pad) | 32-VQFN (exposed pad) - same | 32-VQFN (exposed pad) - same | 32-VQFN (exposed pad) - same | 32-VQFN (exposed pad) - same | 32-VQFN (exposed pad) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 64 KB | 32 KB | 16 KB | 32 KB |
| Maximum CPU Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| LIN Hardware Support | Yes (UART with LIN) | Yes (UART with LIN) | Yes (UART with LIN) | Yes (UART with LIN) | Yes (UART with LIN) | Yes (UART with LIN) |
| Motor Control Peripheral (PSC) | No (C1 general I/O family) | Yes (PSC) | No | No | No | Yes (PSC) |
| AEC-Q100 Qualification | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Maximum Flash headroom in the C1 family (vs ATMEGA32C1-15AZ)
- Highest automotive temperature rating (vs ATMEGA64C1-15AD)
- General I/O focus with LIN, simpler than motor-control parts (vs ATMEGA64M1-15MD)
- Trade-off: lower Flash alternatives cost less (vs ATMEGA16C1-15MD)
Design Notes
The 32-VQFN exposed pad is the primary thermal and ground path for the ATMEGA64C1-15MD. Connect the die pad to the ground plane using a 3x3 or larger via array directly under the package; a floating exposed pad is the most common cause of ADC noise and LIN communication errors on this family. Keep the LIN transceiver (e.g., ATA663254) within 20 mm of the MCU UART pin, and route the LIN bus trace away from PWM outputs to avoid capacitively coupled switching noise onto the single-wire bus.
Grade 150 silicon tolerates up to +150C ambient, but maximum junction temperature and power budget still apply. Estimated: at 5V, 16 MHz with all GPIO loaded at 20 mA source (worst case), internal dissipation can approach 200-400 mV-level drive losses plus core current - verify against the datasheet maximum power figures for your exact GPIO loading. For under-hood enclosures exceeding 105C ambient, derate total I/O current and confirm the junction-to-ambient thermal resistance with the exposed pad soldered to at least 2 square cm of copper pour.
Do not substitute the M1 family parts (ATMEGA64M1-15MD, ATMEGA32M1-15AZ) onto a C1-designed PCB without reviewing peripheral register usage: the M1 variants replace the C1 I/O configuration with a Programmable Sequential Controller (PSC) and differ in ADC channel mapping. Firmware written for the C1 will not run unmodified on the M1. Also note that the -15AD is a Grade 105 part - using it to substitute the -15MD in an above-105C environment violates the qualification limits even though the die is identical.
Compliance Information
AEC-Q100 automotive qualification confirmed by Hotenda and Microchip family data. RoHS/REACH/lead-free status not stated explicitly in the provided distributor data - confirm on the Microchip product page or via certificate of conformance.
