ATMEGA165P-16MNR - AVR 8-Bit MCU 16KB Flash 16MHz | Microchip
MPN: ATMEGA165P-16MNR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.18 | $2.18 |
| 10 | $2.07 | $20.70 |
| 100 | $1.96 | $196.00 |
| 500 | $1.85 | $925.00 |
| 1,000 | $1.75 | $1,750.00 |
ATMEGA165P-16MNR Overview
An AVR ATmega microcontroller is an 8-bit Harvard-architecture MCU that executes most of its 131 powerful instructions in a single clock cycle. Within the product hierarchy, the ATmega165P sits in the megaAVR family of general-purpose microcontrollers, below flash-rich parts such as the ATmega328P and above small-scale ATtiny devices, and serves as the programmable brain of embedded systems.
Key features include the advanced RISC architecture with 32 general purpose working registers, fully static operation to 16 MIPS throughput, 16 KB of self-programmable Flash with Read-While-Write capability, 53 general purpose I/O lines, and a JTAG interface for boundary-scan, on-chip debugging, and programming. The picoPower-enhanced P-grade die also improves reliability relative to the original ATmega165.
Architecturally, the three flexible Timer/Counters, the 10-bit ADC, USART, SPI, and Two-Wire Interface (TWI) peripherals make this part a compact single-chip solution for control and communication tasks. The JTAG port allows In-System Programming (ICSP) and on-chip debug using tools such as the MPLAB SNAP debugger.
Typical applications include industrial control panels, sensor nodes and IoT endpoints, consumer appliance controllers, and battery-powered instrumentation where low-power AVR operation is valuable.
A key design consideration is clock selection: the MNR is a blank, unprogrammed die relying on an external clock source or internal RC oscillator, so fuse configuration must match the crystal circuit to avoid bricking the device during development.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA165P-16MNR — 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 ATMEGA165P-16MNR (same form factor and footprint) — differing in Package, ADC, Core Architecture, Operating Temperature, Packaging.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA165P-16MN
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →ATMEGA165PV-8MNR
✅ Drop-In✓ In Stock
$3.49 / Unit
View Datasheet →ATMEGA165P-16MUR
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA164PA-MNR
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.66 / Unit
View Datasheet →ATMEGA169P-15MT
✅ Drop-In📋 Reference alternative (not in catalog)
ATMEGA165P-16MNR Maximum Ratings & Electrical Characteristics
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 16 MHz |
| Flash Memory | 16 KB (8K x 16) |
| EEPROM | 512 B |
| SRAM | 1 KB |
| General Purpose I/O | 53 |
| Working Registers | 32 |
| Instructions | 131 (most single-cycle) |
| Throughput | Up to 16 MIPS at 16 MHz |
| JTAG Interface | Yes (boundary-scan, on-chip debug, programming) |
| Supply Voltage | 3.3 V / 5 V (per FindIC listing) |
| Operating Temperature | up to 105C (per Mouser listing) |
| Package | 64-QFN (MLF, 9x9 mm) exposed pad |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (R suffix) |
| Timers | Three flexible Timer/Counters (per datasheet summary) |
ATMEGA165P-16MNR 64-qfn (mlf, 9x9 mm) exposed pad Pin Configuration Guide
Pin configuration for ATMEGA165P-16MNR (64-qfn (mlf, 9x9 mm) 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 ATMEGA165P-16MNR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA165P-16MNR is suitable for 6 applications: Industrial Control Panels, Sensor Nodes and IoT Endpoints, Consumer Appliance Controllers, Battery-Powered Instrumentation, Embedded Network Nodes, Motor Control and Actuator Drivers.
Industrial Control Panels
The ATMEGA165P-16MNR fits industrial control panel controllers because its 53 GPIO lines provide enough parallel I/O for relays, indicator LEDs, and keypad scanning without port expanders, while the 16 MHz AVR core executes control loops with deterministic single-cycle instruction timing. The JTAG boundary-scan capability supports production board test on dense panels, and on-chip debug shortens firmware bring-up. Its 105C rating suits cabinet-mounted electronics, and the 16 KB Flash with Read-While-Write supports field firmware updates over RS-485 or TWI links in installed equipment.
Recommended
Sensor Nodes and IoT Endpoints
For battery-powered sensor nodes, the picoPower-class ATMEGA165P-16MNR combines the 16 KB self-programmable Flash needed for OTA firmware storage with 512 B EEPROM for sensor calibration constants that survive power loss. The AVR architecture offers fast wake-up and fully static operation, allowing aggressive clock gating between sampling intervals. The TWI and SPI interfaces connect directly to MEMS sensors and RF modules, and the 64-QFN 9x9 mm footprint keeps node PCB area compact for enclosure-constrained designs.
Recommended
Consumer Appliance Controllers
Appliance control boards benefit from the ATMEGA165P-16MNR's blend of 16 KB Flash for menu/UX logic, 53 GPIO for touch keys, displays, and load drivers, and three flexible Timer/Counters for PWM motor and heater control. The 10-bit on-chip ADC reads NTC thermistors and user potentiometers directly. The JTAG on-chip debug interface accelerates certification-cycle firmware revisions, while the 105C M-grade operating rating covers near-heating-element board locations. Reel packaging (R suffix) suits high-volume SMT appliance production.
Recommended
Battery-Powered Instrumentation
Portable instrumentation such as handheld meters and data loggers uses the ATMEGA165P-16MNR for its fully static core, which tolerates clock throttling from 16 MHz down to DC for aggressive power scaling, and the picoPower P-die improvements over the original ATmega165. The 1 KB SRAM buffers measurement samples between EEPROM write cycles, and the on-chip ADC with internal reference digitizes sensor channels without external conversion ICs. The exposed-pad QFN package improves ground integrity for low-noise analog front ends.
Recommended
Embedded Network Nodes
In wired embedded networks, the ATMEGA165P-16MNR's USART provides the physical link for Modbus RTU and CAN-bridge firmware, while TWI manages I/O expanders and RTCs on the same two-wire bus. The 16 MIPS throughput handles protocol stacking with margin at modest clock rates, preserving timing headroom for application tasks. The JTAG boundary-scan chain supports board-level interconnect verification of dense communication backplanes, and the 16 KB Flash accommodates protocol stacks plus web-bootloader-style update code with Read-While-Write execution.
Recommended
Motor Control and Actuator Drivers
The ATMEGA165P-16MNR drives DC and stepper motors via its three Timer/Counters, generating complementary PWM outputs for H-bridge interfaces with hardware-timed precision. Its 16 MHz single-cycle ALU closes current-loop control at tens of kilohertz with deterministic latency, an advantage over slower 8-bit cores in position-control applications. The 10-bit ADC samples back-EMF and bus-current shunts, and the 64-QFN exposed pad provides a low-inductance ground reference that limits switching-noise coupling into the analog measurement path.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA165P-16MNR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA165P-16MN | ATMEGA165PV-8MNR | ATMEGA169P-15MT |
|---|---|---|---|---|
| Package | 64-QFN (MLF) 9x9 mm exposed pad | 64-QFN (MLF) 9x9 mm - same | 64-QFN (MLF) 9x9 mm - same | 64-QFN (MLF) 9x9 mm - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB |
| Max Clock Frequency | 16 MHz | 16 MHz | 8 MHz | 15 MHz |
| LCD Controller | No | No | No | Yes (multiplexes some GPIO) |
| Packaging Format | Tape & Reel (R suffix) | Tray / cut tape (no R suffix) | Tape & Reel | Tape & Reel |
Key Differentiators
- Full 16 MHz operation vs V-grade sibling (vs ATMEGA165PV-8MNR)
- Clean 53-GPIO map without LCD multiplexing (vs ATMEGA169P-15MT)
- JTAG on-chip debug and boundary-scan (vs ATMEGA164PA-MNR)
- Reel packaging for high-volume SMT (vs ATMEGA165P-16MN)
Design Notes
The 64-QFN (MLF) 9x9 mm package requires the exposed center pad to be soldered to a grounded copper thermal array for both mechanical reliability and ground integrity. Use a 4x4 via array (0.3 mm vias) under the exposed pad connecting to the internal ground plane. For assembly, specify at least 2 thou stencil reduction on the center pad opening to prevent solder wicking that lifts outer QFN leads. MLF parts also need generous no-clean flux wash considerations since cleaning under the package is impossible.
Decouple VCC with a 100 nF ceramic capacitor placed within 3 mm of each supply pin pair, plus a single 4.7 uF bulk capacitor on the board. The FindIC listing shows 3.3V/5V operation; confirm the frequency-versus-voltage derating curve in the full Microchip datasheet before committing to 16 MHz at reduced supply, since AVR maximum clock derates with VCC. For battery designs, leverage the fully static core: halting the clock between measurements drops power dramatically without losing register state.
The MNR is shipped blank and unprogrammed; before first flashing via ICSP or JTAG, ensure the SPIEN fuse remains enabled and avoid setting clock fuses to an external-crystal option until the crystal circuit is verified, or the device becomes unreachable (classic AVR lockout). Keep RESET routing short and add a 10 k-ohm pull-up. If migrating from the original ATmega165, consult Microchip application note AVR513 (doc8064), which documents minor modifications required when moving to the P-grade die.
When running at 16 MHz, route the crystal within 10 mm of the oscillator pins with ground guard traces, and keep JTAG TCK lines away from switching PWM outputs to avoid false debug-clock edges during boundary-scan test. Use series termination (22-33 ohm) on fast USART or SPI lines leaving the board. The exposed ground pad provides a solid return path, so avoid slicing ground planes under high-fanout GPIO banks used for relay or LED driving.
Compliance Information
Compliance data was not present in the retrieved distributor data for this exact part number. Modern active Microchip AVR parts are typically RoHS-compliant and lead-free; verify via the Microchip product page environmental documents or distributor certificate of conformance before use.
