ATMEGA165PA-MN - 16KB Flash 16MHz AVR MCU | Microchip
MPN: ATMEGA165PA-MN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.85 | $38.50 |
| 100 | $3.45 | $345.00 |
| 500 | $3.1 | $1,550.00 |
| 1,000 | $2.75 | $2,750.00 |
ATMEGA165PA-MN Overview
An 8-bit microcontroller (MCU) is a self-contained computing chip that integrates a processor core, program memory, data memory, and peripherals on a single die. Within the power-management and embedded-systems hierarchy, the AVR family sits in the 8-bit MCU class, competing with architectures such as PIC, 8051, and STM8, and is typically paired with power regulators, communication interfaces, and sensor front-ends in a complete embedded design.
Key features of the ATMEGA165PA-MN include the advanced AVR RISC architecture executing 133 powerful instructions, most in a single clock cycle, 32 general-purpose working registers, and read-while-write ISP FLASH that simplifies firmware updates in the field. The picoPower technology enables very low power consumption in idle and power-down modes, making it suited to battery-operated designs.
On the technical side, the device integrates a JTAG interface for boundary-scan and on-chip debugging plus In-Circuit Serial Programming (ICSP), flexible timer/counters, a USART for serial communication, an SPI interface, and a 10-bit ADC. The AVR Harvard architecture fetches instructions and data over separate buses, allowing most instructions to execute in one 62.5 ns cycle at 16MHz, which delivers roughly 16 MIPS of throughput.
Typical applications include industrial control and automation nodes, consumer appliances, and battery-powered portable instruments, where the combination of 16KB self-programmable FLASH, 105C operation, and picoPower sleep modes fits both cost-sensitive and low-power requirements.
A key design consideration is the QFN exposed-pad package: the pad must be soldered to a grounded PCB land pattern for thermal dissipation and reliable operation at 105C. Programming and debugging use two I/O pins plus reset via ICSP, so reserve these pins during layout.
This page synthesizes verified distributor data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA165PA-MN — 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 ATMEGA165PA-MN (same form factor and footprint) — differing in Package, EEPROM, Flash Memory, SRAM, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA1281V-8MUR
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.02 / Unit
View Datasheet →ATMEGA1281-16MUR
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$8.78 / Unit
View Datasheet →ATMEGA325PA-MUR
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA3250PA-MUR
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA165PA-MNR
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →ATMEGA165PA-MN Maximum Ratings & Electrical Characteristics
| Core Architecture | AVR 8-bit RISC |
| Data Bus Width | 8 Bit |
| Flash Memory | 16KB (8K x 16) ISP FLASH |
| EEPROM | 512B |
| SRAM | 1KB |
| Maximum Clock Frequency | 16 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V |
| General Purpose I/O | 54/69 lines (54 available in 64-pin package) |
| Working Registers | 32 general purpose |
| Instruction Set | 133 instructions, mostly single-cycle |
| Debug/Programming Interface | JTAG (boundary-scan, on-chip debug) and ICSP |
| Low Power Technology | picoPower |
| Operating Temperature | -40C to +105C |
| Package | 64-QFN (9x9 mm) MLF/VQFN with exposed pad, Green |
| Mounting Type | Surface Mount |
| Lifecycle Status | ACTIVE |
| RoHS Status | Green (RoHS compliant) |
ATMEGA165PA-MN 64-qfn (9x9 mm) mlf/vqfn with exposed pad, green Pin Configuration Guide
Pin configuration for ATMEGA165PA-MN (64-qfn (9x9 mm) mlf/vqfn with exposed pad, green 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 ATMEGA165PA-MN.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA165PA-MN is suitable for 6 applications: Industrial Control and Automation, Battery-Powered Portable Instruments, Consumer Appliance Control Boards, Sensor Nodes and IoT Endpoints, Test and Measurement Equipment, Motor Control and Power Subsystems.
Industrial Control and Automation
The ATMEGA165PA-MN fits industrial control nodes because its -40C to +105C operating range covers enclosed control cabinets, and its 54 GPIO lines drive relays, indicators, and read switches without external port expanders. The AVR core executes most of its 133 instructions in a single 16MHz clock cycle, delivering deterministic scan loops for PLC-style I/O handling. The USART links to Modbus-style serial networks while the SPI bus attaches ADCs or EEPROM. Because the 2.7V to 5.5V supply range tolerates noisy industrial rails, a simple regulator suffices. Designers should budget JTAG/ICSP pins for field firmware updates via the on-chip interfaces.
Recommended
Battery-Powered Portable Instruments
PicoPower technology makes the ATMEGA165PA-MN well suited to battery-operated meters and data loggers: sleep modes cut average current dramatically between measurement bursts, and the 2.7V minimum supply allows operation from three alkaline cells or a single lithium cell with regulation. The integrated 10-bit ADC reads sensor channels directly, timers generate precision wake-up intervals, and the 512B EEPROM stores calibration constants without external memory. A typical topology sleeps in power-down with a watchdog or timer wake-up, samples through the ADC, and transmits over USART. The trade-off is the modest 1KB SRAM, which limits buffering for long logging sessions.
Recommended
Consumer Appliance Control Boards
Appliance front panels benefit from the ATMEGA165PA-MN combination of 16KB self-programmable FLASH for feature-rich firmware, 54 GPIO for keypads, LEDs, and displays, and a 105C rating for hot enclosures near motors or heating elements. The AVR single-cycle RISC core handles button debouncing, display refresh, and AC zero-cross timing in software without a second timer IC, while the USART or SPI communicates with a main controller. Read-while-write FLASH enables field firmware updates over the serial link. Designers should note the QFN exposed pad must be grounded on the PCB for reliable thermal performance in sealed appliance housings.
Recommended
Sensor Nodes and IoT Endpoints
For wired sensor endpoints, the ATMEGA165PA-MN offers a compact single-chip solution: the 10-bit ADC digitizes analog sensors, SPI connects external flash or RF modules, and the USART streams readings upstream. Sleep-mode operation from picoPower silicon keeps node current in the microamp range between samples, and the wide 2.7V to 5.5V input range accommodates scavenged or unregulated supplies. A common architecture uses a timer wake-up, burst ADC sampling, SPI transfer to a radio module, then return to power-down. The 16KB FLASH accommodates a communication stack plus application logic, though developers must manage the 1KB SRAM carefully.
Recommended
Test and Measurement Equipment
Bench accessories and handheld testers use the ATMEGA165PA-MN for its JTAG on-chip debugging, which shortens firmware iteration during development, and its deterministic single-cycle instruction execution, which keeps timing loops predictable for measurement sequencing. The 10-bit ADC captures analog inputs while the SPI interfaces precision converters when higher resolution is needed, and the USART provides PC connectivity for data upload. The 105C rating tolerates enclosed, passively cooled instruments. Field units can be re-flashed in-circuit through ICSP, so service technicians update calibration firmware without disassembly - a practical advantage over socketed-program parts.
Recommended
Motor Control and Power Subsystems
Small motor-control boards use the ATMEGA165PA-MN timers to generate PWM waveforms with software sequencing, while GPIO coordinates direction and enable signals. Single-cycle instruction execution gives the interrupt latency determinism needed for commutation timing in fan and pump controllers. The 5.5V maximum supply supports direct drive of MOSFET gate-driver ICs from the same rail, simplifying the power tree, and the USART reports speed and fault telemetry to a host controller. Operating to 105C suits motor housings where ambient temperatures rise under load. The 64-QFN package keeps the controller footprint small on dense driver PCBs.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA165PA-MN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA1281V-8MUR | ATMEGA1281-16MUR | ATMEGA325PA-MUR | ATMEGA165PA-MNR |
|---|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) MLF, exposed pad | 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 | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16KB | 128KB | 128KB | 32KB | 16KB |
| SRAM | 1KB | 8KB | 8KB | 2KB | 1KB |
| Maximum Clock Frequency | 16 MHz | 8 MHz | 16 MHz | 16 MHz | 16 MHz |
| Packing | Tray (MN) | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
Key Differentiators
- Lowest memory footprint in the same 64-MLF drop-in group (vs ATMEGA1281-16MUR)
- Full 16MHz speed grade with 105C rating (vs ATMEGA1281V-8MUR)
- Tray packing suits prototyping and low-volume builds (vs ATMEGA165PA-MNR)
Design Notes
The ATMEGA165PA-MN uses a 64-QFN (9x9 mm) package with an exposed pad on the bottom. Solder this pad to a grounded PCB land pattern with an array of thermal vias; it provides both the primary heat path for 105C operation and electrical grounding for the die. Standard non-solder-mask-defined (NSMD) pads around 0.5 mm pitch with proper stencil apertures prevent solder bridging on the fine-pitch perimeter pads.
Decouple the VCC/AVCC pins with 100 nF ceramic capacitors placed within a few millimeters of each pin, plus one bulk capacitor of 4.7 uF to 10 uF near the device. Connect AVCC to VCC through a low-pass filter (for example a 10 ohm resistor or ferrite plus 100 nF) when ADC accuracy matters, since digital switching noise on AVCC degrades 10-bit ADC results. Per AVR datasheet practice, keep the analog ground return path separate until a single-point star connection.
Reserve the JTAG pins (along with reset) for in-circuit debugging and ICSP programming - tying them to other functions can lock out reprogramming, and JTAG must be disabled via fuse if those pins are needed as GPIO. Also verify the clock-frequency-versus-VCC safe operating region from the Microchip datasheet: running at 16MHz requires sufficient supply headroom, and brown-out detection should be enabled via fuse to prevent FLASH corruption during slow power ramps.
Compliance Information
Listed as a Green package by Microchip/distributor data, indicating RoHS-compliant lead-free construction. REACH, halogen-free, and conflict-minerals status not stated in the provided data.
