ATMEGA165P-16AN - AVR 8-bit MCU 16KB 16MHz TQFP-64 | Microchip
MPN: ATMEGA165P-16AN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.18 | $2.18 |
| 10 | $2.05 | $20.50 |
| 100 | $1.9 | $190.00 |
| 500 | $1.78 | $890.00 |
| 1,000 | $1.65 | $1,650.00 |
ATMEGA165P-16AN Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals such as timers, UARTs, and ADCs on one die. Within the power-management-free control-IC hierarchy, the ATmega AVR family sits in the general-purpose MCU class alongside PIC, 8051, and similar 8-bit architectures, serving as the central control element of embedded systems.
Key features include the advanced AVR RISC architecture with 131 powerful instructions, most executing in a single clock cycle, 32 general-purpose working registers, and fully static operation to 16 MIPS. The picoPower-qualified P-variant adds improved power characteristics, and the JTAG interface (IEEE-compatible per the datasheet) provides boundary-scan, on-chip debugging, and in-system programming.
Technically, the device pairs Read-While-Write FLASH with three flexible Timer/Counters, enabling motor control, PWM generation, and precise event timing. The Harvard architecture separates program and data buses, sustaining one-instruction-per-cycle throughput that outperforms classic 8051 cores at equal clock rates.
Typical applications include industrial automation controllers, consumer appliance user interfaces, and battery-powered instrumentation, where 16KB of self-programmable FLASH and a rich peripheral set cover most mid-size control tasks without external memory.
Design consideration: choose the 16AN grade for 16 MHz operation at 5V; for battery designs, evaluate the lower-speed PV voltage variants to exploit the wide 1.8V supply range.
This page synthesizes distributor pricing, drop-in alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA165P-16AN — 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-16AN (same form factor and footprint) — differing in Package, RoHS Status, Instruction Set, Supply Voltage Range, Communication Interfaces.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA165A-AU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$3.47 / Unit
View Datasheet →ATMEGA165PV-8AN
✅ Drop-In✓ In Stock
$3.25 / Unit
View Datasheet →ATMEGA169A-AU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.98 / Unit
View Datasheet →ATMEGA325A-AU
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA645A-AU
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA165P-16AN Maximum Ratings & Electrical Characteristics
| Core Architecture | AVR 8-bit RISC |
| Max CPU Speed | 16 MHz |
| Flash Memory | 16 KB (8K x 16) ISP |
| EEPROM | 512 B |
| SRAM | 1 KB |
| General Purpose I/O | 53 lines |
| Working Registers | 32 x 8-bit |
| Instruction Set | 131 instructions, most single-cycle |
| Throughput | Up to 16 MIPS |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Supply Voltage Grades | 3.3 V / 5 V |
| Debug/Programming Interfaces | JTAG (boundary-scan, on-chip debug), ISP |
| Timers | Three flexible Timer/Counters |
| Package | 64-TQFP (14 x 14 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (Green per Mouser listing) |
ATMEGA165P-16AN 64-tqfp (14 x 14 mm) Pin Configuration Guide
Pin configuration for ATMEGA165P-16AN (64-tqfp (14 x 14 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 ATMEGA165P-16AN.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA165P-16AN is suitable for 6 applications: Industrial Automation Controllers, Consumer Appliance User Interfaces, Battery-Powered Instrumentation, Embedded Networking Nodes (UART/SPI/I2C), Motor Control and PWM Actuation, Test Fixtures and Production Programming.
Industrial Automation Controllers
The ATMEGA165P-16AN fits small industrial control nodes that need deterministic 8-bit control with modest memory. Its 16 MHz AVR core delivers up to 16 MIPS with most of the 131 instructions executing in a single cycle, enabling tight control loops for conveyors, valve sequencing, and sensor polling. The three flexible Timer/Counters generate PWM for actuators while the 16KB ISP FLASH with Read-While-Write supports field firmware updates over UART. The wide 1.8V to 5.5V supply range tolerates noisy 5V industrial rails, and the JTAG boundary-scan capability supports production board test, reducing fixture cost in factory programming and diagnostics.
Recommended
Consumer Appliance User Interfaces
Appliance control panels - washing machines, ovens, coffee makers - need a low-cost MCU that scans keypads, drives LEDs or displays, and sequences loads. The ATMEGA165P-16AN covers this with 53 GPIO lines, enough to directly drive a multiplexed key matrix and indicator bank without port expanders. Its 512B EEPROM stores calibration data and user settings through power cycles, and the 16KB FLASH holds UI state machines with headroom. The picoPower P-variant's low sleep current supports standby modes mandated by energy regulations, while the 5V TQFP-64 grade integrates cleanly with triac-driver and relay electronics common in white-good boards.
Recommended
Battery-Powered Instrumentation
Portable instruments benefit from the ATMEGA165P-16AN's picoPower characteristics and wide 1.8V to 5.5V operating range, allowing direct operation from two alkaline cells or a single lithium cell through most of the discharge curve. Sleep modes with the JTAG-disabled configuration minimize standby drain between measurements, and the three Timer/Counters support periodic wake-up sampling without the CPU running continuously. The 1KB SRAM buffers logged readings, and 512B EEPROM retains calibration constants. Designers should clock the device below 16 MHz at reduced supply voltage, following the frequency-versus-voltage derating curve in the Microchip datasheet to guarantee margin.
Recommended
Embedded Networking Nodes (UART/SPI/I2C)
Field nodes bridging sensors to RS-485, RS-232, or simple SPI/I2C backbones are a natural fit for the ATMEGA165P-16AN. The AVR core sustains 16 MIPS at 16 MHz, sufficient to service UART framing, checksum computation, and application logic concurrently at 115200 baud and above. The 16KB FLASH accommodates a compact protocol stack plus bootloader, and ISP Read-While-Write permits firmware update without removing the node from service. The 64-TQFP's abundant GPIO handles address straps, status LEDs, and flow control. JTAG on-chip debugging shortens bring-up when integrating protocol state machines with real-time peripheral timing.
Recommended
Motor Control and PWM Actuation
Small motor and actuator control - DC fans, blinds, dosing pumps - leverages the ATMEGA165P-16AN's three Timer/Counters, which produce multi-channel PWM with hardware phase correctness per the Microchip datasheet. Running at 16 MHz gives fine PWM resolution for quiet fan control and smooth actuator positioning, while single-cycle ALU operations keep the control loop latency low. The 53 GPIO lines interface directly to hall sensors, limit switches, and H-bridge enable signals. The device's fully static operation allows clock throttling for torque-limited soft-start profiles, and EEPROM storage retains position calibration and fault counters across power interruptions.
Recommended
Test Fixtures and Production Programming
The ATMEGA165P-16AN's JTAG interface supports IEEE-compatible boundary-scan, making it useful in bed-of-nails and flying-probe test strategies where interconnect verification matters. In-circuit programming through JTAG or SPI-based ISP lets a single fixture program and verify boards without pre-programmed stock. The 16 MHz industrial-grade part provides deterministic timing for stimulus generation, and its 1KB SRAM handles capture buffers for simple response checking. Fixture designers should reserve the four JTAG pins (TCK, TMS, TDI, TDO) on the 64-TQFP footprint and confirm fuse settings, since disabling JTAGEN reclaims those pins as general-purpose I/O.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA165P-16AN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA165A-AU | ATMEGA165PV-8AN | ATMEGA169A-AU | ATMEGA325A-AU | ATMEGA645A-AU |
|---|---|---|---|---|---|---|
| Package | 64-TQFP (14x14 mm) | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 32 KB | 64 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB | 4 KB |
| Max CPU Speed | 16 MHz | 16 MHz | 8 MHz | 16 MHz | 16 MHz | 16 MHz |
| Special Features | JTAG, picoPower P-step | JTAG, newer picoPower A-generation | JTAG, low-voltage picoPower | JTAG plus segment LCD controller | JTAG, larger memory | JTAG, largest memory, LCD option family |
| Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| GPIO | 53 | 53 | 53 | 53 (fewer if LCD pins used) | 54 | 54 |
Key Differentiators
- Full 16 MHz speed grade with picoPower P-step (vs ATMEGA165PV-8AN)
- Lower cost than larger-memory family members (vs ATMEGA325A-AU)
- General-purpose GPIO focus vs LCD-equipped parts (vs ATMEGA169A-AU)
Design Notes
The ATMEGA165P-16AN is specified up to 16 MHz across a 1.8V to 5.5V supply, but the frequency-versus-voltage curve in the Microchip datasheet derates maximum clock at low VCC. Running 16 MHz at 3.3V is not guaranteed - as a rule of thumb for AVR parts, stay below roughly 8 MHz at 3.3V and consult the exact datasheet curve. If your application must run full speed at reduced voltage, select the appropriate speed/voltage grade alternative (such as ATMEGA165PV-8AN for 8 MHz battery systems) rather than overclocking.
Decouple VCC and AVCC independently with 100 nF ceramic capacitors placed within a few millimeters of the respective 64-TQFP power pins, plus one bulk 4.7 uF to 10 uF per supply rail. Tie unused inputs either to ground with pull-downs or configure them as outputs low to prevent floating-node oscillation. The TQFP-64 0.5 mm pitch requires solder-mask-defined pads per the Microchip packaging drawing; verify land pattern against IPC-7351 style footprints before panel layout.
JTAG pins (TCK, TMS, TDI, TDO) are enabled by the JTAGEN fuse at reset and override port functions on the shared GPIO. If your board uses those pins as I/O, either clear JTAGEN or set the JTD bit in software twice within four cycles, as the datasheet requires. Also note the P-variant picoPower sleep currents assume JTAG disabled; leaving JTAG enabled in production firmware measurably increases standby current. Plan the JTAG header as a footprint-only pad set for production programming.
With 53 GPIO switching at up to 16 MHz, ground bounce on the 64-TQFP is manageable but not negligible: use all available GND pins on the footprint, keep high-fan-out outputs grouped on one port, and add small (22 to 33 ohm) series resistors on long traces to cables. For crystal operation at 16 MHz, follow the datasheet load-capacitor guidance (typically 12 to 22 pF depending on crystal CL) and keep the crystal loop compact and guarded by ground pour.
Compliance Information
Mouser listing identifies the part as 'GRN' (green), indicating RoHS-compliant lead-free packaging. REACH and halogen-free status not stated in provided data.