ATMEGA324P-15MT1 - 8-bit AVR MCU 32KB 44-QFN | Microchip
MPN: ATMEGA324P-15MT1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.4 | $340.00 |
| 500 | $3.05 | $1,525.00 |
| 1,000 | $2.75 | $2,750.00 |
ATMEGA324P-15MT1 Overview
An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, placing it in the microcontroller tier of the semiconductor hierarchy (microcontroller -> embedded processor -> integrated circuit). ATmega devices combine program Flash, data SRAM, and EEPROM on one die, along with timers, ADC channels, and serial communication interfaces, forming a complete embedded control system on a single chip.
Key features include read-while-write Flash operation for in-system self-programming, 32 general-purpose working registers directly connected to the ALU, and multiple serial interfaces including SPI and TWI (I2C-compatible) plus USART channels. The 44-QFN exposed-pad package provides a compact 7x7 mm footprint with improved thermal and ground performance, suiting space-constrained industrial and automotive nodes.
The device belongs to Microchip's picoPower ATmega324P generation, which emphasizes low power consumption through multiple sleep modes, allowing battery-powered and always-on automotive body-electronic applications to minimize standby current. The AVR core supports In-Circuit Serial Programming (ICSP) and on-chip debugging via the debugWIRE interface using the RESET line.
Typical applications include automotive auxiliary control modules, industrial sensor and actuator nodes, HVAC and appliance controllers, and handheld instrumentation where a 5V-tolerant 8-bit MCU with 2.7V to 5.5V supply range simplifies mixed-voltage system design.
Designers should note that the exposed pad must be soldered to a grounded PCB land pattern for both mechanical reliability and EMC performance, and fuse-bit configuration governs clock source and boot-loader operation.
This page synthesizes verified distributor specifications, drop-in family alternatives, and practical design notes beyond what typical distributor listings provide.
Drop-in alternatives for ATMEGA324P-15MT1 — 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 ATMEGA324P-15MT1 (same form factor and footprint) — differing in Package, EEPROM, SRAM, Maximum Clock Frequency, Number of I/O.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA324P-15MT
✅ Drop-In✓ In Stock
$2.97 / Unit
View Datasheet →ATMEGA324PA-MU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.05 / Unit
View Datasheet →ATMEGA324A-MU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$3.9 / Unit
View Datasheet →ATMEGA164P-B15MZ
✅ Drop-In✓ In Stock
$1.76 / Unit
View Datasheet →ATMEGA164PA-MU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.55 / Unit
View Datasheet →ATMEGA644PA-MU
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA324P-15MT1 Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR RISC |
| Program Memory (Flash) | 32KB (16K x 16) |
| SRAM | 2KB (2K x 8) |
| EEPROM | 1KB |
| Maximum Clock Speed | 16 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Number of I/O | 32 |
| Package | 44-VFQFN Exposed Pad (7x7 mm) |
| Mounting Type | Surface Mount |
| Qualification | Automotive, AEC-Q100 |
| Family | AVR ATmega (picoPower ATmega324P) |
| Programming Interfaces | ICSP, debugWIRE, SPI |
| Serial Interfaces | USART, SPI, TWI (I2C-compatible) |
| Peripherals | Timers/counters, ADC, comparators |
| Flash Feature | Read-while-write, ISP self-programming |
ATMEGA324P-15MT1 44-vfqfn exposed pad (7x7 mm) Pin Configuration Guide
Pin configuration for ATMEGA324P-15MT1 (44-vfqfn exposed pad (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 ATMEGA324P-15MT1.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA324P-15MT1 is suitable for 6 applications: Automotive Auxiliary Control Modules, Industrial Sensor and Actuator Nodes, HVAC and Appliance Controllers, Handheld and Battery-Powered Instrumentation, Consumer IoT and Smart Home End Nodes, Test, Measurement and Development Fixtures.
Automotive Auxiliary Control Modules
The ATMEGA324P-15MT1 carries Automotive AEC-Q100 qualification, explicitly noted in distributor listings (Hotenda, atmel-micro.com), which is the primary reason to select this exact -15MT1 suffix over the industrial -15MT. In body-electronic modules such as seat controllers, lighting drivers, and HVAC flap actuators, the 32KB Flash handles modest control firmware while the 2KB SRAM supports state machines and communication buffers. The 2.7V to 5.5V supply range tolerates automotive load-dump-derived rail variation when paired with upstream regulation, and the 16 MHz AVR core executes single-cycle instructions for responsive I/O handling. The 44-VQFN 7x7 mm exposed-pad package aids both compact placement and ground integrity for EMC-sensitive vehicle environments.
Recommended
Industrial Sensor and Actuator Nodes
For industrial sensing nodes, the ATMEGA324P-15MT1 combines its on-chip ADC and analog circuitry with 32 GPIO lines to read multiple sensors and drive actuators from one die. The 5.5V maximum supply allows direct connection to 5V industrial logic rails, simplifying level-shifting against legacy PLC-style peripherals. USART, SPI, and TWI interfaces connect Modbus-style serial links, external ADCs or EEPROM, and digital sensors respectively. The read-while-write Flash enables firmware update-in-field via the self-programming boot loader, a valuable maintenance feature for deployed equipment. Its picoPower sleep modes cut idle consumption in continuously powered installations, and the exposed-pad QFN anchors thermal and ground performance on vibration-prone machinery boards.
Recommended
HVAC and Appliance Controllers
White-goods and HVAC control boards benefit from the ATMEGA324P-15MT1's balance of memory, I/O, and low standby power. The 1KB EEPROM stores calibration data, user settings, and fault logs through power cycles, while the 32 I/O lines drive displays, relays, and triac triggers, and read rotary encoders and NTC temperature inputs via the internal ADC. The 16 MHz core provides adequate headroom for PID temperature-control loops with single-cycle ALU throughput. Sleep modes allow the controller to idle at low current between housekeeping cycles, meeting standby-energy expectations in modern appliances. The AEC-Q100 qualification of the -15MT1 additionally gives appliance manufacturers a reliability-qualified option for hot, thermally cycling enclosures.
Recommended
Handheld and Battery-Powered Instrumentation
Portable instruments exploit the ATmega324P's picoPower technology: multiple sleep modes reduce average current, extending battery life in meters, testers, and data loggers. The 2.7V minimum supply supports operation directly from two alkaline cells or a single lithium cell with a simple regulator, while the 16 MHz maximum clock preserves responsiveness when active. The on-chip ADC digitizes sensor channels, and the 2KB SRAM buffers logging data between EEPROM writes or serial offloads via USART. The compact 44-VQFN (7x7 mm) exposed-pad package fits slim handheld housings, and the AVR's single-cycle I/O access simplifies bit-banged protocols for LCDs and custom peripherals. debugWIRE on-chip debugging speeds firmware iteration during development.
Recommended
Consumer IoT and Smart Home End Nodes
In smart-home sensor and actuator nodes, the ATMEGA324P-15MT1 provides the serial connectivity layer: TWI (I2C) links to environmental sensors, SPI to RF modules, and USART to gateway bridges. The 32KB Flash accommodates protocol stacks and OTA-style boot loaders using the read-while-write self-programming feature, letting firmware update without external memory. Sleep-mode operation minimizes draw on battery or energy-harvesting supplies, and the 5V-tolerant 5.5V supply ceiling simplifies interfacing to mains-derived 5V rails found in powered nodes. The exposed-pad QFN improves RF ground integrity relative to leaded packages, and although this automotive-qualified suffix exceeds consumer requirements, it transfers reliability margin to always-on household devices.
Recommended
Test, Measurement and Development Fixtures
Bench fixtures and production test equipment frequently adopt the ATmega324P for its predictable 8-bit timing, generous 32 I/O count, and easy ICSP reprogramming between fixture jobs. The 16 MHz AVR core delivers deterministic single-cycle instruction timing useful for generating precisely timed stimulus patterns, while the ADC captures pass/fail analog measurements. USART links report results to a host PC, and SPI/TWI program or verify DUT EEPROMs and sensors in-circuit. The 44-VQFN package suits dense fixture motherboards, and because ICSP requires only a few pins per Microchip's documentation, fixtures can self-update firmware on the production floor. The AEC-Q100 part also serves temperature-cycling qualification rigs that stress components across automotive ranges.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA324P-15MT1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA324P-15MT | ATMEGA324PA-MU | ATMEGA324A-MU | ATMEGA164P-B15MZ | ATMEGA644PA-MU |
|---|---|---|---|---|---|---|
| Package | 44-VQFN (7x7) Exposed Pad | 44-VQFN (7x7) - same | 44-VQFN (7x7) - same | 44-VQFN (7x7) - same | 44-VQFN (MQFN) - same | 44-VQFN (7x7) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32KB | 32KB | 32KB | 32KB | 16KB | 64KB |
| SRAM | 2KB | 2KB | 2KB | 2KB | 1KB | 4KB |
| EEPROM | 1KB | 1KB | 1KB | 1KB | 512B | 2KB |
| Power Profile | picoPower ATmega324P generation | identical die | lower current (PA) | A-generation revisions | B-variant | lower current (PA) |
Key Differentiators
- Automotive AEC-Q100 qualification in the -15MT1 suffix (vs ATMEGA324P-15MT)
- Same footprint with double memory upgrade path (vs ATMEGA644PA-MU)
- Lower-power successor availability (vs ATMEGA324PA-MU)
Design Notes
The 44-VFQFN exposed pad is the primary ground connection for the device and must be soldered to a grounded land pattern. Follow Microchip QFN layout guidance: use a solder-mask-defined pad array on the PCB thermal pad with roughly 50-60% coverage to balance solder wetting and voiding, and stitch multiple vias from the pad to the ground plane to reduce inductance and aid heat spreading. Skipping the exposed-pad connection is a common cause of intermittent resets and failed EMC testing on QFN AVR designs.
Decouple every VCC and AVCC pin with 100 nF ceramic capacitors placed within a few millimeters of the pins, plus a bulk 4.7 uF to 10 uF capacitor near the supply entry. Tie AVCC to VCC through an LC or RC filter when ADC accuracy matters, since switching noise on AVCC directly degrades conversion results. The device operates from 2.7V to 5.5V; at 5V the maximum rated 16 MHz speed grade applies, so verify fuse clock selection matches your rail voltage per the AVR speed-versus-voltage derating curve.
Fuse-bit configuration is the most common bring-up failure: an incorrect clock-source fuse (external crystal selected with no crystal fitted) bricks apparent operation until a clock is supplied or a high-voltage parallel programmer recovers the device. Also note that RESET doubles as the debugWIRE debug pin; enabling debugWIRE removes standard ISP programming until debug is disabled. When substituting ATMEGA324PA-MU for the -15MT1, re-verify Brown-Out Detector thresholds and current budgets, as the PA generation datasheet values differ from the P generation.
Compliance Information
Automotive AEC-Q100 qualification confirmed via distributor listings (Hotenda, atmel-micro.com). RoHS/REACH/lead-free status not stated in the provided verified data.
