ATMEGA168PA-15MZ - 8-bit AVR MCU 16KB Flash 20MHz | Microchip
N.º de pieza: ATMEGA168PA-15MZ ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.1 | $2,10 |
| 10 | $1.89 | $18,90 |
| 100 | $1.68 | $168,00 |
| 500 | $1.45 | $725,00 |
| 1.000 | $1.26 | $1.260,00 |
ATMEGA168PA-15MZ Descripción general
A microcontroller unit (MCU) integrates a processor core, program memory, data memory, and peripherals on a single die, sitting at the center of the embedded systems hierarchy (MCU -> embedded processor -> semiconductor device). The AVR family uses a modified Harvard architecture in which most of its 131 instructions execute in a single clock cycle, so each megahertz of clock yields roughly one MIPS of effective throughput - a defining trait of 8-bit AVR RISC design.
Key features include 23 general-purpose I/O lines, 32 general-purpose working registers, an 8-channel 10-bit ADC available in the QFN/MLF package, two 8-bit and one 16-bit timer with PWM, USI-capable serial interfaces (SPI, I2C, UART), debugWIRE on-chip debug, and picoPower sleep modes down to sub-uA currents. The PA suffix denotes the picoPower revision with lower power consumption than the original ATmega168.
The device operates from 1.8V to 5.5V and across -40C to +125C, and is qualified to AEC-Q100 for automotive use. Read-while-write flash enables in-system self-programming, and a 4KB self-programming flash section supports bootloaders.
Typical applications include automotive body and comfort modules, industrial sensor nodes, battery-powered metering, and motor control interfaces where 16 KB of code space and wide temperature range are sufficient.
Design tip: use the debugWIRE pin (shared with RESET) for in-circuit debugging, and keep the exposed pad soldered to a ground pour for thermal and EMC performance.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para ATMEGA168PA-15MZ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ATMEGA168PA-15MZ (mismo factor de forma y huella) — difiere en Operating Temperature, Package, ADC, Instruction Set, Communication Interfaces.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ATMEGA168A-MMHR
✅ Sustitución directa✓ En stock
$1.58 / unidad
Ver hoja de datos →ATMEGA168A-MU
✅ Sustitución directa✓ En stock
$1.38 / unidad
Ver hoja de datos →ATMEGA168P-20MUR
✅ Sustitución directa✓ En stock
$1.58 / unidad
Ver hoja de datos →ATMEGA168-15MZ
✅ Sustitución directa✓ En stock
$1.31 / unidad
Ver hoja de datos →ATMEGA328P-MU
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$2.85 / unidad
Ver hoja de datos →ATMEGA168PA-15MZ Valores máximos y características eléctricas
| Core Architecture | 8-bit AVR RISC |
| Flash Program Memory | 16 KB (ISP, read-while-write) |
| SRAM | 1 KB |
| EEPROM | 512 B |
| Frecuencia de reloj máxima | 20 MHz |
| Throughput | Up to 20 MIPS at 20 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| General Purpose I/O | 23 lines |
| Working Registers | 32 x 8-bit |
| ADC | 8-channel, 10-bit (QFN/MLF package) |
| Timers | 2 x 8-bit, 1 x 16-bit with PWM |
| Serial Interfaces | SPI, I2C, USART |
| Debug System | debugWIRE on-chip debug |
| Temperatura de funcionamiento | -40C to +125C |
| Encapsulado | 32-QFN (5x5 mm) with exposed pad |
| Tipo de montaje | Surface Mount |
| Automotive Qualification | AEC-Q100 qualified |
| Power Technology | picoPower low-power sleep modes |
| Instruction Set | 131 instructions, mostly single-cycle |
Configuración de pines de ATMEGA168PA-15MZ
| Pin 1 | PD3 (PCINT19/OC2B/INT1) — Port D, bit 3; pin-change interrupt 19; Timer2 output compare B; external interrupt 1 |
| Pin 2 | PD4 (PCINT20/XCK/T0) — Port D, bit 4; pin-change interrupt 20; USART external clock; Timer0 clock input |
| Pin 3 | GND — Ground |
| Pin 4 | VCC — Digital supply voltage |
| Pin 5 | GND — Ground |
| Pin 6 | VCC — Digital supply voltage |
| Pin 7 | PB6 (PCINT6/XTAL1/TOSC1) — Port B, bit 6; crystal oscillator pin 1 / timer oscillator input |
| Pin 8 | PB7 (PCINT7/XTAL2/TOSC2) — Port B, bit 7; crystal oscillator pin 2 / timer oscillator output |
| Pin 9 | PD5 (PCINT21/OC0B/T1) — Port D, bit 5; pin-change interrupt 21; Timer0 output compare B; Timer1 clock input |
| Pin 10 | PD6 (PCINT22/OC0A/AIN0) — Port D, bit 6; pin-change interrupt 22; Timer0 output compare A; analog comparator input 0 |
| Pin 11 | PD7 (PCINT23/AIN1) — Port D, bit 7; pin-change interrupt 23; analog comparator input 1 |
| Pin 12 | PB0 (PCINT0/CLKO/ICP1) — Port B, bit 0; pin-change interrupt 0; system clock output; Timer1 input capture |
| Pin 13 | PB1 (PCINT1/OC1A) — Port B, bit 1; pin-change interrupt 1; Timer1 output compare A (PWM) |
| Pin 14 | PB2 (PCINT2/SS/OC1B) — Port B, bit 2; pin-change interrupt 2; SPI slave select; Timer1 output compare B (PWM) |
| Pin 15 | PB3 (PCINT3/OC2A/MOSI) — Port B, bit 3; pin-change interrupt 3; Timer2 output compare A; SPI master output |
| Pin 16 | PB4 (PCINT4/MISO) — Port B, bit 4; pin-change interrupt 4; SPI master input |
| Pin 17 | PB5 (PCINT5/SCK) — Port B, bit 5; pin-change interrupt 5; SPI clock |
| Pin 18 | AVCC — ADC supply voltage |
| Pin 19 | ADC6 — ADC input channel 6 (QFN/MLF package only) |
| Pin 20 | AREF — ADC reference voltage |
| Pin 21 | GND — Ground |
| Pin 22 | ADC7 — ADC input channel 7 (QFN/MLF package only) |
| Pin 23 | PC0 (PCINT8/ADC0) — Port C, bit 0; pin-change interrupt 8; ADC input channel 0 |
| Pin 24 | PC1 (PCINT9/ADC1) — Port C, bit 1; pin-change interrupt 9; ADC input channel 1 |
| Pin 25 | PC2 (PCINT10/ADC2) — Port C, bit 2; pin-change interrupt 10; ADC input channel 2 |
| Pin 26 | PC3 (PCINT11/ADC3) — Port C, bit 3; pin-change interrupt 11; ADC input channel 3 |
| Pin 27 | PC4 (PCINT12/SDA/ADC4) — Port C, bit 4; pin-change interrupt 12; I2C data; ADC input channel 4 |
| Pin 28 | PC5 (PCINT13/SCL/ADC5) — Port C, bit 5; pin-change interrupt 13; I2C clock; ADC input channel 5 |
| Pin 29 | PC6 (PCINT14/RESET) — Port C, bit 6; reset input (active low); debugWIRE interface pin |
| Pin 30 | PD0 (PCINT16/RXD) — Port D, bit 0; pin-change interrupt 16; USART receive |
| Pin 31 | PD1 (PCINT17/TXD) — Port D, bit 1; pin-change interrupt 17; USART transmit |
| Pin 32 | PD2 (PCINT18/INT0) — Port D, bit 2; pin-change interrupt 18; external interrupt 0 |
Aplicaciones típicas
ATMEGA168PA-15MZ es adecuado para 6 aplicacións: Automotive Body and Comfort Modules, Battery-Powered Metering and Sensor Nodes, Industrial Sensor Acquisition, LED Lighting and Dimming Control, Hobby, Education and Prototyping, Motor Control and Fan Interfaces.
Automotive Body and Comfort Modules
The ATMEGA168PA-15MZ's AEC-Q100 qualification and -40C to +125C operating range make it a natural fit for automotive body electronics such as window lift controllers, seat adjusters, lighting modules, and mirror control units. The 23 GPIO lines drive relays, H-bridges, and LED indicators through its PWM-capable timers, while the 10-bit ADC reads analog position sensors and diagnostic feedback. Running from the 1.8V to 5.5V rail, it tolerates regulated 5V automotive supplies, and picoPower sleep modes keep quiescent draw low enough for modules that remain powered when the vehicle is parked. The 16 KB flash accommodates LIN-style polling firmware and diagnostic routines in a 5x5 mm QFN footprint suited to compact module PCBs.
Recomendado
Battery-Powered Metering and Sensor Nodes
PicoPower technology gives the ATMEGA168PA-15MZ sub-uA sleep currents in power-down mode, enabling multi-year battery life in water, gas, and heat meters and in wireless sensor nodes. The design pattern is to wake the MCU on a timer or pin interrupt, sample with the 8-channel 10-bit ADC, process, transmit via a low-power radio or UART link, and return to sleep. Wide 1.8V to 5.5V operation lets the circuit run directly from two AA cells or a single lithium coin cell without a regulator, and the 512 B EEPROM stores calibration constants across battery replacement. The 16 KB flash holds the full acquisition stack including protocol framing and checksum routines.
Recomendado
Industrial Sensor Acquisition
In factory environments, the ATMEGA168PA-15MZ serves as a local acquisition controller digitizing analog sensor signals with its 10-bit ADC and converting them to 4-20 mA, pulse, or digital bus outputs. The three timers generate PWM for actuator drive and frequency outputs for flow or speed signals, while SPI and I2C interface external precision ADCs, EEPROM, and displays. The -40C to +125C rating covers cabinets mounted near motors and drives, and the debugWIRE interface lets engineers add diagnostics in-system without extra header footprint. The 20 MIPS throughput is ample for PID loops and moving-average filtering on 8-bit data, keeping cost per channel low across distributed I/O points.
Recomendado
LED Lighting and Dimming Control
The two 8-bit timers and one 16-bit timer of the ATMEGA168PA-15MZ provide multiple hardware PWM channels for constant-current LED driver control, color mixing, and smooth dimming curves at frequencies above audible flicker thresholds. The 10-bit ADC can monitor current sense resistors and temperature (via NTC) for closed-loop brightness regulation and thermal foldback, extending luminaire lifetime. Operating from 1.8V to 5.5V allows direct interfacing with 3.3V or 5V driver ICs, and the automotive qualification of the -15MZ variant opens automotive interior and exterior lighting subassemblies. The 16 KB flash implements communication stacks such as DALI or DMX receive logic within the same 5x5 mm footprint.
Recomendado
Hobby, Education and Prototyping
Because the ATmega168 family is supported by the Arduino ecosystem, AVR-GCC, and the MPLAB/Atmel Studio toolchain, the ATMEGA168PA-15MZ is a low-cost core for education kits, robotics platforms, and rapid prototypes. The QFN-32 (5x5 mm) package suits compact student PCBs, while ICSP programming needs only MOSI, MISO, SCK, RESET, and power pins. debugWIRE provides source-level debugging over the RESET line using a single wire - an uncommon convenience at this price point. The 131-instruction AVR RISC core is also a classic teaching architecture, and the same code base migrates directly to pin-compatible ATmega328P parts when projects outgrow 16 KB flash.
Recomendado
Motor Control and Fan Interfaces
The ATMEGA168PA-15MZ implements small brushed-DC and stepper motor control loops using its 16-bit timer for precise PWM generation and the ADC for back-EMF or current sensing. Hardware PWM with configurable dead time simplifies H-bridge control, while external interrupts on any GPIO capture quadrature or Hall encoder feedback with low latency. The -40C to +125C range suits automotive pump, blower, and HVAC actuator control near the motor itself, and picoPower sleep modes benefit intermittently operated actuators in battery-backed systems. The 20 MIPS core executes commutation tables and PI control at update rates well above mechanical time constants within the compact QFN footprint.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATMEGA168PA-15MZ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATMEGA168A-MMHR | ATMEGA168A-MU | ATMEGA168P-20MUR | ATMEGA168-15MZ | ATMEGA328P-MU |
|---|---|---|---|---|---|---|
| Package | 32-QFN (5x5 mm) EP | 32-QFN (5x5 mm) - same | 32-QFN (5x5 mm) - same | 32-QFN (5x5 mm) - same | 32-QFN (5x5 mm) - same | 32-QFN (5x5 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 | 16 KB | 32 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| 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 |
| Power Technology | picoPower (PA revision) | Standard A revision | Standard A revision | picoPower (P revision) | Non-picoPower 168 die | picoPower (P revision) |
Diferenciadores clave
- Automotive AEC-Q100 qualification in this package (frente a ATMEGA168A-MU)
- picoPower low-power revision (frente a ATMEGA168-15MZ)
- Lower cost than the ATmega328P class (frente a ATMEGA328P-MU)
- Trade-off: smaller memory than 328P (frente a ATMEGA328P-MU)
Notas de diseño
The 32-QFN (5x5 mm) package has an exposed die pad that must be soldered to a ground pour via an array of small vias (typically 3x3 or 4x4, 0.3 mm vias) for reliable grounding and EMC performance. Multiple VCC (pins 4, 6) and GND (pins 3, 5, 21) pins each need a local 100 nF ceramic decoupling capacitor placed within 2-3 mm of the pin, plus a 10 uF bulk capacitor near the part. AVCC (pin 18) requires its own 100 nF capacitor and, per Microchip datasheet guidance, must not be left floating even if the ADC is unused.
The RESET pin (PC6) doubles as the debugWIRE data line; enabling debugWIRE via fuse disables ISP programming until debugWIRE is disabled from the debugger. Engineers commonly brick in-circuit debug sessions by pulling RESET low externally while debugWIRE is active. Also, changing CKSEL fuses to select an external crystal while no crystal is fitted leaves the device unresponsive - use the internal 8 MHz RC oscillator as the safe default, and apply clock-speed derating versus VCC: 20 MHz requires VCC at 4.5V or higher per AVR datasheet operating curves.
Estimated: in picoPower power-down mode with watchdog disabled, sleep current is in the sub-uA class (exact figure per the ATmega168PA datasheet electrical characteristics tables), so for a 3V coin-cell node drawing, say, 20 mA at 1% duty cycle (3.6 ms active every 360 ms), average current is roughly 0.2 mA plus sleep leakage - a CR2032 (220 mAh) supports over a year of continuous sampling. Minimize active time and disable unused peripherals (ADC, analog comparator, BOD) before entering sleep for maximum battery life.
If an external crystal is used on PB6/PB7, keep the crystal and its load capacitors (typically 12-22 pF, value per crystal spec) within a few millimeters of the pins with a solid ground guard. Route the ADC sense lines away from PWM outputs and clock traces, and use AREF (pin 20) with a 100 nF capacitor to ground for reference stability - do not connect an external voltage source to AREF while the internal reference is selected, as this can short the internal reference amplifier.
Información de cumplimiento
AEC-Q100 automotive qualification confirmed by datasheets.com part record (automotive aec-q100, 32-pin QFN EP). RoHS/REACH/lead-free status not stated in the provided verified data - verify on the Microchip product page before release.
