ATMEGA88PB-AU - 8-Bit AVR MCU 20MHz 8KB Flash | Microchip
N.º de pieza: ATMEGA88PB-AU ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.11 | $1,11 |
| 10 | $1.05 | $10,50 |
| 100 | $0.98 | $98,00 |
| 500 | $0.92 | $460,00 |
| 1.000 | $0.86 | $860,00 |
ATMEGA88PB-AU Descripción general
An 8-bit microcontroller is a single-chip computer whose CPU processes data in 8-bit words, combining a processor core, memory, and peripherals such as timers and serial interfaces in one integrated circuit. Within the embedded systems hierarchy, the ATmega88PB sits in Microchip's AVR ATmega family of flash-based MCUs, part of the broader category of microcontroller units (MCUs) used for embedded control, sensing, and connectivity tasks. The AVR enhanced RISC architecture executes most instructions in a single clock cycle, achieving throughputs approaching 1 MIPS per MHz.
Key features include picoPower technology for ultra-low sleep-mode consumption, read-while-write Flash for in-system self-programming, 32 general-purpose working registers, and three flexible timer/counters with compare modes. Peripherals further include a USART with start-of-frame wake-up, a byte-oriented two-wire interface (I2C-compatible), an SPI serial port, a 10-bit ADC, an analog comparator, and internal plus external interrupt sources.
Technically, the device is a low-power CMOS design in Microchip's AVR core, qualified as a Functional Safety (FuSa) part per DigiKey categorization, and operates over the industrial temperature range in a Green (halogen-free, RoHS-compliant) TQFP package. Debugging and In-Circuit Serial Programming (ICSP) are supported through the MPLAB SNAP tool via two I/O pins and the reset line, reducing design overhead.
Typical applications include industrial sensor nodes, consumer appliance control, battery-powered IoT end nodes, and motor control or lighting systems where a cost-optimized 8-bit MCU with rich analog peripherals is required. The PB variant adds improved low-power characteristics versus the earlier ATmega88PA.
A key design consideration is clock selection: at 20 MHz maximum frequency, use an external crystal for timing-critical UART communication, while the internal 8 MHz RC oscillator suffices for less timing-sensitive designs.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet, delivering unique cross-reference and selection value for engineers and buyers.
Alternativas directas para ATMEGA88PB-AU — 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 ATMEGA88PB-AU (mismo factor de forma y huella) — difiere en Package, RoHS Status, Operating Temperature, Flash Memory, Packaging.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ATMEGA88PB-ANR
✅ Sustitución directa✓ En stock
$1.38 / unidad
Ver hoja de datos →ATMEGA88PA-AUR
✅ Sustitución directa✓ En stock
$0.82 / unidad
Ver hoja de datos →ATMEGA88PA-ANR
✅ Sustitución directa✓ En stock
$0.92 / unidad
Ver hoja de datos →ATMEGA88A-AU
✅ Sustitución directa✓ En stock
$1.52 / unidad
Ver hoja de datos →ATMEGA88-20AU
✅ Sustitución directa✓ En stock
$2.33 / unidad
Ver hoja de datos →ATMEGA168PB-AU
✅ Sustitución directa✓ En stock
$1.27 / unidad
Ver hoja de datos →ATMEGA88PB-AUR
✅ Sustitución directa✓ En stock
$0.94 / unidad
Ver hoja de datos →ATMEGA88PB-AU Valores máximos y características eléctricas
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 20 MHz |
| Flash Memory | 8 KB (4K x 16) |
| EEPROM | 512 B |
| SRAM | 1 KB |
| General Purpose I/O | 27 |
| Working Registers | 32 general purpose |
| Timers/Counters | 3 flexible timer/counters with compare modes |
| Connectivity | USART, SPI, I2C (two-wire interface) |
| ADC Resolution | 10-bit |
| Peripherals | Analog comparator, internal/external interrupts, brown-out detect/reset, POR, PWM, WDT |
| Low Power Technology | picoPower |
| Encapsulado | 32-TQFP (7x7 mm) |
| Tipo de montaje | Surface Mount |
| Grade / Qualification | Functional Safety (FuSa) |
| Color / Package Attribute | Green (GRN) |
| Programming / Debug | ICSP via MPLAB SNAP (2 I/O pins + reset) |
| Architecture | AVR enhanced RISC, ~1 MIPS per MHz |
| Estado RoHS | Compliant (Green package) |
Configuración de pines de ATMEGA88PB-AU
| Pin 1 | PD3 (PCINT19/OC2B/INT1) — Port D bit 3 / pin change interrupt / Timer2 compare B output / external interrupt 1 |
| Pin 2 | PD4 (PCINT20/XCK/T0) — Port D bit 4 / pin change interrupt / 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 input 1 / timer oscillator input |
| Pin 8 | PB7 (PCINT7/XTAL2/TOSC2) — Port B bit 7 / crystal oscillator output 2 / timer oscillator output |
| Pin 9 | PD5 (PCINT21/OC0B/T1) — Port D bit 5 / pin change interrupt / Timer0 compare B output / Timer1 clock input |
| Pin 10 | PD6 (PCINT22/OC0A/AIN0) — Port D bit 6 / pin change interrupt / Timer0 compare A output / analog comparator positive input |
| Pin 11 | PD7 (PCINT23/AIN1) — Port D bit 7 / pin change interrupt / analog comparator negative input |
| Pin 12 | PB0 (PCINT8/CLKO/ICP1) — Port B bit 0 / pin change interrupt / clock output / Timer1 input capture |
| Pin 13 | PB1 (PCINT9/OC1A) — Port B bit 1 / pin change interrupt / Timer1 compare A output |
| Pin 14 | PB2 (PCINT10/OC1B/SS) — Port B bit 2 / pin change interrupt / Timer1 compare B output / SPI slave select |
| Pin 15 | PB3 (PCINT11/OC2A/MOSI) — Port B bit 3 / pin change interrupt / Timer2 compare A output / SPI master output |
| Pin 16 | PB4 (PCINT12/MISO) — Port B bit 4 / pin change interrupt / SPI master input |
| Pin 17 | PB5 (PCINT13/SCK) — Port B bit 5 / pin change interrupt / SPI clock |
| Pin 18 | AVCC — ADC supply voltage |
| Pin 19 | ADC6 — ADC input channel 6 |
| Pin 20 | AREF — Analog reference voltage for ADC |
| Pin 21 | GND — Ground |
| Pin 22 | ADC7 — ADC input channel 7 |
| Pin 23 | PC0 (PCINT14/ADC0) — Port C bit 0 / pin change interrupt / ADC input channel 0 |
| Pin 24 | PC1 (PCINT15/ADC1) — Port C bit 1 / pin change interrupt / ADC input channel 1 |
| Pin 25 | PC2 (PCINT16/ADC2) — Port C bit 2 / pin change interrupt / ADC input channel 2 |
| Pin 26 | PC3 (PCINT17/ADC3) — Port C bit 3 / pin change interrupt / ADC input channel 3 |
| Pin 27 | PC4 (PCINT18/ADC4/SDA) — Port C bit 4 / pin change interrupt / ADC channel 4 / two-wire interface data |
| Pin 28 | PC5 (PCINT19/ADC5/SCL) — Port C bit 5 / pin change interrupt / ADC channel 5 / two-wire interface clock |
| Pin 29 | PC6 (PCINT20/RESET) — Port C bit 6 / pin change interrupt / active-low reset input |
| Pin 30 | PD0 (PCINT24/RXD) — Port D bit 0 / pin change interrupt / USART receive data |
| Pin 31 | PD1 (PCINT25/TXD) — Port D bit 1 / pin change interrupt / USART transmit data |
| Pin 32 | PD2 (PCINT18/INT0) — Port D bit 2 / pin change interrupt / external interrupt 0 |
Aplicaciones típicas
ATMEGA88PB-AU es adecuado para 6 aplicacións: Industrial Sensor Nodes, Battery-Powered IoT End Nodes, Consumer Appliance Control, Motor Control and Lighting, Embedded Development and Education, Security and Access Control Systems.
Industrial Sensor Nodes
The ATMEGA88PB-AU fits industrial sensor acquisition nodes because its 10-bit ADC, analog comparator, and 27 GPIO lines interface directly with analog sensors, switches, and actuators without external glue logic. The picoPower technology allows the node to sleep between measurement cycles, and pin-change or watchdog-timer wake-ups restore operation within microseconds. Placed between a sensor front-end and an RS-485 or wireless module via its USART/SPI, the MCU samples at the ADC's rated rate while consuming minimal average power. Its industrial qualification and FuSa categorization support deployment in factory monitoring equipment where long field life and low maintenance access are required.
Recomendado
Battery-Powered IoT End Nodes
For battery-operated IoT end nodes, the ATMEGA88PB-AU's picoPower architecture minimizes average current draw in power-down sleep, which dominates the energy budget of duty-cycled devices. The USART wake-up on start-of-transmission feature lets a sleeping MCU react to incoming radio data without polling, and the 1 KB SRAM buffers sensor payloads and protocol stacks for lightweight mesh or LPWAN modules. Designers typically run the chip from a 3 V coin cell or Li-SOCl2 cell through an LDO, sleeping at microamp levels and waking on RTC or pin-change interrupts to sample the 10-bit ADC and transmit via SPI to the radio. The 8 KB Flash accommodates the application plus a compact OTA-style bootloader.
Recomendado
Consumer Appliance Control
Consumer appliances such as coffee machines, fans, and small heaters benefit from the ATMEGA88PB-AU's combination of PWM timer/counters, comparator-based zero-cross detection, and low-cost TQFP-32 assembly. Three flexible timers with compare modes generate PWM for triac firing or motor speed control, while the analog comparator and ADC monitor temperature via NTC sensors. The internal RC oscillator removes the crystal from the BOM in non-timing-critical appliances, and brown-out detection with power-on reset guarantees safe state recovery after mains interruptions. RoHS-compliant Green packaging and surface-mount assembly keep unit cost low at appliance production volumes, and the 27 I/O lines directly drive LEDs, keys, and relays.
Recomendado
Motor Control and Lighting
In small motor control and LED lighting applications, the ATMEGA88PB-AU provides multiple hardware PWM channels from its timer/counter compare units, enabling fan speed regulation, brushed-DC drive, and LED dimming without additional PWM ICs. The analog comparator supports cycle-by-cycle current limiting when paired with a shunt resistor, while the 10-bit ADC reads potentiometer or NTC feedback. The 20 MHz maximum clock gives sufficient loop bandwidth for proportional control at audible-noise-free PWM frequencies. Designers pair the MCU with a MOSFET gate driver or low-side switch, using the GPIO drive strength to switch the FET directly at low frequencies. Its FuSa categorization assists in products where basic safety functions are required.
Recomendado
Embedded Development and Education
The ATMEGA88PB-AU is a mainstay of embedded development boards and educational platforms because the AVR architecture is documented extensively, programming requires only an inexpensive MPLAB SNAP or ISP cable through the two-pin-plus-reset ICSP interface, and free AVR GCC toolchains run under MPLAB X and Microchip Studio. The 32 general-purpose working registers and single-cycle execution make assembly and C both tractable for teaching RISC concepts, while real peripherals - UART, SPI, I2C, ADC, PWM - cover a complete embedded curriculum. University labs and hobby platforms often accept ATmega88/168/328 code bases interchangeably, so code written for the 88PB scales to larger family members without relearning the architecture.
Recomendado
Security and Access Control Systems
Door access controllers, keypad panels, and small alarm panels leverage the ATMEGA88PB-AU's external and pin-change interrupt capability for instant response to key presses and door sensors, while the EEPROM retains user codes and configuration through power loss - 512 B stores dozens of credential records. The USART connects to RS-485 networks or GSM modules for remote monitoring, and SPI interfaces RFID reader front-ends. Interrupt-driven design means the MCU can sleep in a low-power state between events, important for battery-backed panels. Brown-out reset ensures the state machine recovers predictably from supply sag during lock actuation, and the 20 MHz core handles Wiegand protocol decoding in software with timing margin.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATMEGA88PB-AU — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATMEGA88PB-ANR | ATMEGA88PA-AUR | ATMEGA88A-AU | ATMEGA168PB-AU |
|---|---|---|---|---|---|
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB (4K x 16) | 8 KB | 8 KB | 8 KB | 16 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| EEPROM | 512 B | 512 B | 512 B | 512 B | 512 B |
| Max Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Low Power Technology | picoPower (PB generation) | picoPower (PB) | picoPower (PA, earlier generation) | No picoPower (A generation) | picoPower (PB) |
| Lifecycle Status | Active | Active | Active (older generation) | Active (legacy) | Active |
Diferenciadores clave
- Newest PB silicon generation with picoPower refinements (frente a ATMEGA88PA-AUR)
- Functional Safety (FuSa) categorization (frente a ATMEGA88A-AU)
- Lowest memory tier in the PB family with identical footprint (frente a ATMEGA168PB-AU)
Notas de diseño
Estimated: decouple both VCC pins (4, 6) and AVCC (18) with 100 nF ceramic capacitors placed within 5 mm of each pin, plus a 10 uF bulk capacitor per supply rail. AVCC should be connected to VCC through a low-pass LC filter (10 uH + 100 nF) when ADC accuracy matters, since digital switching noise on AVCC directly degrades the 10-bit ADC's effective resolution. Never leave AVCC unconnected even if the ADC is unused - the datasheet requires it tied to VCC.
Route the crystal (PB6/PB7, pins 7-8) with short traces and guard with ground pour, keeping load capacitors (typically 12-22 pF depending on crystal spec) adjacent to the pins. If PB6/PB7 are used as GPIO instead of a crystal, no special layout is needed. Keep the RESET line (PC6, pin 29) with a 10 kOhm pull-up and route it away from switching traces so ISP programming and brown-out behavior remain reliable. Provide a 2x3 ICSP header footprint for MPLAB SNAP programming access.
The most common migration pitfall is assuming ATmega88PA firmware behavior transfers unchanged to the PB: the PB adds peripherals and alters some register/bit definitions, so recompile against the ATmega48PB/88PB/168PB header files and re-verify sleep currents and ADC channel assignments (note ADC6/ADC7 are on dedicated pins 19/22, not Port C). Also confirm fuse settings - an incorrect CKDIV8 or clock-source fuse on a new silicon revision is the leading cause of 'dead' new boards.
Estimated: at 20 MHz, 5 V, and typical GPIO loading, the ATMEGA88PB-AU dissipates on the order of tens of milliwatts, so no heatsink or thermal via array is needed for the 32-TQFP. Thermal considerations only matter if many pins continuously source/sink the full 20 mA pin limit; in that worst case, verify total package power against the datasheet absolute maximum and keep junction temperature within the industrial operating range.
Información de cumplimiento
Listed as Green (GRN) package by DigiKey and Mouser, indicating RoHS compliance, lead-free, and halogen-free construction. REACH and conflict-minerals status not stated in provided data.
