ATMEGA168PA-MNR - AVR 8-Bit MCU 16KB 20MHz VQFN-32 | Microchip
Référence : ATMEGA168PA-MNR ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.1 | $2,10 |
| 10 | $1.89 | $18,90 |
| 100 | $1.68 | $168,00 |
| 500 | $1.51 | $755,00 |
| 1 000 | $1.36 | $1 360,00 |
ATMEGA168PA-MNR Présentation
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.
Alternatives de remplacement direct pour ATMEGA168PA-MNR — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATMEGA168PA-MNR (même facteur de forme et même empreinte) — différant par Package, Communication Interfaces, Flash Memory, ADC, Operating Temperature.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATMEGA168A-MU
✅ Remplacement direct✓ En stock
$1.38 / unité
Voir la fiche technique →ATMEGA168PA-MU
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$1.72 / unité
Voir la fiche technique →ATMEGA328P-MU
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$2.85 / unité
Voir la fiche technique →ATMEGA328-MU
✅ Remplacement direct✓ En stock
$2.2 / unité
Voir la fiche technique →ATMEGA88PA-MU
✅ Remplacement direct✓ En stock
$1.26 / unité
Voir la fiche technique →ATMEGA48PA-MU
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$1.08 / unité
Voir la fiche technique →ATMEGA328PB-MNR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATMEGA168PA-MNR Valeurs maximales et caractéristiques électriques
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 20 MHz |
| Flash Memory | 16 KB (8K x 16) |
| EEPROM | 512 B |
| SRAM | 1 KB |
| Température de fonctionnement | -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) |
| Boîtier | 32-VQFN (5x5 mm) MLF, exposed pad |
| Type de montage | Surface Mount |
| Packaging | Tape & Reel (MNR suffix) |
| Programming / Debug | ICSP, debugWIRE |
Configuration des broches de ATMEGA168PA-MNR
| Broche 1 | PD3 — Port D bit 3 / INT1 external interrupt |
| Broche 2 | PD4 — Port D bit 4 / Timer0 T0 input |
| Broche 3 | GND — Ground |
| Broche 4 | VCC — Digital supply voltage |
| Broche 5 | GND — Ground |
| Broche 6 | VCC — Digital supply voltage |
| Broche 7 | PB6 — Port B bit 6 / XTAL1 clock input |
| Broche 8 | PB7 — Port B bit 7 / XTAL2 clock output |
| Broche 9 | PD5 — Port D bit 5 / Timer0 T1 input |
| Broche 10 | PD6 — Port D bit 6 / Analog comparator AIN0 |
| Broche 11 | PD7 — Port D bit 7 / Analog comparator AIN1 |
| Broche 12 | PB0 — Port B bit 0 / XCK, T0 |
| Broche 13 | PB1 — Port B bit 1 / T1, OC1A |
| Broche 14 | PB2 — Port B bit 2 / SS, OC1B |
| Broche 15 | PB3 — Port B bit 3 / MOSI, OC2A |
| Broche 16 | PB4 — Port B bit 4 / MISO |
| Broche 17 | PB5 — Port B bit 5 / SCK |
| Broche 18 | AVCC — Analog supply voltage for ADC |
| Broche 19 | ADC6 — ADC input channel 6 |
| Broche 20 | AREF — Analog reference voltage |
| Broche 21 | GND — Ground |
| Broche 22 | ADC7 — ADC input channel 7 |
| Broche 23 | PC0 — Port C bit 0 / ADC0 |
| Broche 24 | PC1 — Port C bit 1 / ADC1 |
| Broche 25 | PC2 — Port C bit 2 / ADC2 |
| Broche 26 | PC3 — Port C bit 3 / ADC3 |
| Broche 27 | PC4 — Port C bit 4 / ADC4, SDA |
| Broche 28 | PC5 — Port C bit 5 / ADC5, SCL |
| Broche 29 | PC6 — Port C bit 6 / RESET (active low) |
| Broche 30 | PD0 — Port D bit 0 / USART RXD |
| Broche 31 | PD1 — Port D bit 1 / USART TXD |
| Broche 32 | PD2 — Port D bit 2 / INT0 external interrupt |
Applications typiques
ATMEGA168PA-MNR convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATMEGA168PA-MNR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- picoPower low-sleep-current technology (vs ATMEGA168A-MU)
- Lowest cost with adequate code space (vs ATMEGA328P-MU)
- Room to grow within one footprint (vs ATMEGA48PA-MU)
Notes de conception
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.
Informations de conformité
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.
