ATMEGA168PA-MNR - AVR 8-Bit MCU 16KB 20MHz VQFN-32 | Microchip
MPN: ATMEGA168PA-MNR ✓ Hoạt độngATMEGA168PA-MNR Tóm tắt
An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that combines program FLASH, data SRAM, and EEPROM on a single die, forming the core of a full system-on-chip power management and embedded control solution. The AVR family pioneered single-cycle instruction execution, making ATmega devices a de facto standard for cost-sensitive embedded control from hobby platforms to industrial products.
Key features of the ATMEGA168PA-MNR include 23 general-purpose I/O lines, 32 general-purpose working registers, three flexible timer/counters with compare modes (two 8-bit, one 16-bit), a 10-bit ADC with up to 8 channels, and serial peripherals including USART, SPI, and two-wire I2C interfaces. The picoPower technology delivers very low sleep-mode currents, extending battery life in portable designs. On-chip debug via debugWIRE and In-Circuit Serial Programming (ICSP) simplify development with tools such as MPLAB SNAP and AVR ISP MKII.
The advanced RISC architecture provides 131 powerful instructions, hardware multiply, and read-while-write FLASH operation. Brown-out detection, power-on reset, an internal calibrated 8 MHz RC oscillator, and a watchdog timer reduce external component count and improve system robustness. Six sleep modes, including Idle, ADC Noise Reduction, Power-save, and Power-down, allow fine-grained energy optimization down to the microamp range.
Typical applications include battery-powered consumer devices, industrial sensor nodes, motor and LED control, HVAC and home-automation products, and low-cost data loggers where the 16 KB FLASH / 1 KB SRAM balance is sufficient and the compact 5x5 mm VQFN footprint saves PCB area.
A key design consideration: the -MNR suffix indicates Tape and Reel packaging and the lead-free/RoHS MLF package, whose exposed die pad must be soldered to a grounded copper pour for both mechanical retention and thermal performance; VCC/GND decoupling capacitors should be placed within 2 mm of the pads.
This page adds value beyond the manufacturer datasheet by synthesizing distributor pricing tiers, drop-in same-footprint alternatives across the ATmega48/88/168/328 families, and practical PCB and power-design notes in one citation-ready reference.
Bộ thay thế dễ dàng lắp đặt cho ATMEGA168PA-MNR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATMEGA168PA-MNR (cùng hình factor và footprint) — khác nhau ở Package, Communication Interfaces, Flash Memory, Operating Temperature, ADC.
ATMEGA168A-MU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA168PA-MU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA328P-MU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA328-MU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA88PA-MU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA48PA-MU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA328PB-MNR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA168PA-MNR Tỷ lệ tối đa & tính chất điện
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 20 MHz |
| Flash Memory | 16 KB (8K x 16) |
| EEPROM | 512 B |
| SRAM | 1 KB |
| Nhiệt độ hoạt động | -40C to +105C |
| Number of I/O | 23 |
| Timers/Counters | 3 (2 x 8-bit, 1 x 16-bit) |
| ADC Resolution | 10-bit |
| ADC Channels | 8 |
| Communication Interfaces | USART, SPI, I2C (TWI) |
| Hộp | 32-VQFN (5x5 mm) MLF, exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel (MNR suffix) |
| Programming / Debug | ICSP, debugWIRE |
Cấu hình chân ATMEGA168PA-MNR
| Chân 1 | PD3 — Port D bit 3 / INT1 external interrupt |
| Chân 2 | PD4 — Port D bit 4 / Timer0 T0 input |
| Chân 3 | GND — Ground |
| Chân 4 | VCC — Digital supply voltage |
| Chân 5 | GND — Ground |
| Chân 6 | VCC — Digital supply voltage |
| Chân 7 | PB6 — Port B bit 6 / XTAL1 clock input |
| Chân 8 | PB7 — Port B bit 7 / XTAL2 clock output |
| Chân 9 | PD5 — Port D bit 5 / Timer0 T1 input |
| Chân 10 | PD6 — Port D bit 6 / Analog comparator AIN0 |
| Chân 11 | PD7 — Port D bit 7 / Analog comparator AIN1 |
| Chân 12 | PB0 — Port B bit 0 / XCK, T0 |
| Chân 13 | PB1 — Port B bit 1 / T1, OC1A |
| Chân 14 | PB2 — Port B bit 2 / SS, OC1B |
| Chân 15 | PB3 — Port B bit 3 / MOSI, OC2A |
| Chân 16 | PB4 — Port B bit 4 / MISO |
| Chân 17 | PB5 — Port B bit 5 / SCK |
| Chân 18 | AVCC — Analog supply voltage for ADC |
| Chân 19 | ADC6 — ADC input channel 6 |
| Chân 20 | AREF — Analog reference voltage |
| Chân 21 | GND — Ground |
| Chân 22 | ADC7 — ADC input channel 7 |
| Chân 23 | PC0 — Port C bit 0 / ADC0 |
| Chân 24 | PC1 — Port C bit 1 / ADC1 |
| Chân 25 | PC2 — Port C bit 2 / ADC2 |
| Chân 26 | PC3 — Port C bit 3 / ADC3 |
| Chân 27 | PC4 — Port C bit 4 / ADC4, SDA |
| Chân 28 | PC5 — Port C bit 5 / ADC5, SCL |
| Chân 29 | PC6 — Port C bit 6 / RESET (active low) |
| Chân 30 | PD0 — Port D bit 0 / USART RXD |
| Chân 31 | PD1 — Port D bit 1 / USART TXD |
| Chân 32 | PD2 — Port D bit 2 / INT0 external interrupt |
Ứng dụng tiêu biểu
ATMEGA168PA-MNR phù hợp cho 6 Áp dụngs: Battery-Powered Sensor Nodes, Industrial Control and Automation, Consumer Appliances and Home Automation, Motor Control and LED Lighting, Automotive Body and Convenience Modules, Hobby, Education, and Rapid Prototyping.
Battery-Powered Sensor Nodes
The ATMEGA168PA-MNR is a strong fit for battery-powered sensor nodes because its picoPower technology offers six sleep modes, including Power-down at microamp-level current, which directly translates to multi-year coin-cell life. Its 16 KB FLASH accommodates wireless protocol stacks and calibration code, while 1 KB SRAM buffers sensor data. Typical designs pair the MCU with an RF transceiver over SPI and sample the ADC at 10-bit resolution. By waking on pin-change or watchdog interrupt, duty-cycled operation is achieved without an external wake timer, and the internal 8 MHz oscillator eliminates crystal cost in non-timing-critical nodes.
Được đề xuất
Industrial Control and Automation
In industrial control panels and automation modules, the ATMEGA168PA-MNR's -40C to +105C operating range, brown-out detector, and watchdog timer provide the robustness required on noisy factory floors. The 16-bit timer with compare modes generates PWM for motor and heater control, while the USART links to RS-485 transceivers for Modbus-style networks. With 23 GPIO lines, it directly drives relays and opto-isolated inputs. Its VQFN-32 footprint keeps control-board area small, and the wide Flash headroom (16 KB) leaves space for field-updatable firmware delivered over the serial bootloader.
Được đề xuất
Consumer Appliances and Home Automation
Consumer appliances such as coffee machines, fans, and smart-home controllers benefit from the ATMEGA168PA-MNR's low cost, single-cycle RISC core at 20 MHz, and integrated capacitive-touch-capable I/O. The 10-bit ADC reads NTC thermistors and user potentiometers, while TWI (I2C) interfaces OLED display drivers. picoPower sleep modes meet standby-energy regulations for appliances that idle most of the day. Because the device programs in-system via ICSP, manufacturers can flash final firmware on the assembly line. The 5x5 mm VQFN fits compact appliance PCBs behind front panels where space is at a premium.
Được đề xuất
Motor Control and LED Lighting
For small motor control and LED lighting drivers, the ATMEGA168PA-MNR provides two 8-bit timers and one 16-bit timer with compare outputs, enabling multi-channel PWM at up to 8-bit resolution for dimming and speed control. The hardware ADC synchronizes current-sense feedback for closed-loop regulation, and the 20 MHz clock gives sufficient loop bandwidth for fan and pump control. Operating to +105C ambient suits enclosed luminaires. The ADC Noise Reduction sleep mode reduces measurement jitter during current sampling, and the interrupt-on-pin-change feature handles zero-cross detection for AC phase-dimming applications without additional components.
Được đề xuất
Automotive Body and Convenience Modules
While the standard ATMEGA168PA-MNR is not the AEC-Q100 qualified variant, its architecture underpins automotive-grade siblings, and the device itself is used in non-safety vehicle convenience electronics such as seat-position memories, interior lighting, and aftermarket accessories within cabin temperature limits. The 16 KB FLASH stores seat-motor sequences and LIN frames, the USART connects to LIN transceivers for the vehicle network, and the 10-bit ADC reads position potentiometers. Designers needing automotive qualification should cross to the ATmega168PA-AUR graded part, which shares the same die and pinout for easy migration.
Được đề xuất
Hobby, Education, and Rapid Prototyping
The ATMEGA168PA-MNR is the silicon behind popular hobby and educational platforms (the pre-2010 Arduino family used the ATmega168), making it ideal for rapid prototyping and STEM education. A vast ecosystem of bootloaders, libraries, and programmers supports it; ICSP programming works with inexpensive USBasp and MPLAB SNAP tools. The 32 general-purpose registers and 131 single-cycle instructions make assembly teaching straightforward, while C compilers such as avr-gcc are mature. Because the ATmega48/88/168/328 family shares one VQFN-32 pinout, prototypes built on the 168PA upgrade to 32 KB ATmega328P for release firmware without any board respin.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATMEGA168PA-MNR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATMEGA168A-MU | ATMEGA168PA-MU | ATMEGA328P-MU | ATMEGA88PA-MU | ATMEGA48PA-MU | ATMEGA328PB-MNR |
|---|---|---|---|---|---|---|---|
| Package | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 16 KB | 32 KB | 8 KB | 4 KB | 32 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB | 1 KB | 256 B | 2 KB |
| EEPROM | 512 B | 512 B | 512 B | 1 KB | 64 B | 64 B | 1 KB |
| Max Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| picoPower Technology | Yes | No | Yes | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- picoPower low-sleep-current technology (vsATMEGA168A-MU)
- Lowest cost with adequate code space (vsATMEGA328P-MU)
- Room to grow within one footprint (vsATMEGA48PA-MU)
Ghi chú thiết kế
The 32-pad VQFN (MLF) package has an exposed die pad on the bottom that must be connected to ground. Design the PCB land pattern with a central thermal pad of roughly 3.5 x 3.5 mm tied to the GND plane via an array of 9 to 16 vias (0.3 mm diameter) for heat spreading and mechanical reliability. Extend PCB pads 0.3 to 0.5 mm beyond the package edge for solder fillet inspection, and stencil-print the center pad with about 50% coverage to avoid paste voids.
Decouple each VCC pin (pins 4 and 6) and AVCC (pin 18) with 100 nF ceramic capacitors placed within 2 mm of the pads, plus a single 10 uF bulk capacitor near the device. AVCC must be connected to VCC even if the ADC is unused - leaving it floating causes undefined ADC behavior. Tie AREF (pin 20) to GND through 100 nF when using internal references; never drive AREF with an external voltage while an internal reference is selected.
PC6 is RESET by default and is not usable as general I/O unless the RSTDISBL fuse is programmed - which permanently disables ISP programming and should be avoided. Enabling debugWIRE by programming the DWEN fuse requires the device to run from a stable clock; recovery from an accidental DWEN/SPIEN fuse lockout may require a high-voltage programmer. Also verify clock-source fuses: shipping default is the internal 8 MHz oscillator with CKDIV8 enabled, so a fresh device starts at only 1 MHz.
Keep the crystal (if used on PB6/PB7) within 5 mm of the device with short ground guards around the 12 to 22 pF load capacitors. Route analog ADC inputs (PC0-PC5, ADC6/ADC7) away from USART and SPI switching lines; use the ADC Noise Reduction sleep mode and a series 1k resistor plus 100 nF filter on high-impedance sensors to preserve 10-bit accuracy. Analog ground return should tie to the die-pad ground at a single point to avoid digital switching noise modulating ADC readings.
Thông tin tuân thủ
The MNR suffix indicates lead-free (NiPdAu finish) MLF packaging; DigiKey lists the part as RoHS-compliant. REACH, halogen-free and conflict-minerals status not stated in provided data.
