ATMEGA88PB-AUR - 8KB Flash AVR MCU 20MHz TQFP-32 | Microchip
MPN: ATMEGA88PB-AUR ✓ Hoạt độngATMEGA88PB-AUR Tóm tắt
An AVR ATmega microcontroller is a Harvard-architecture 8-bit RISC processor that executes most instructions in a single clock cycle, sitting at the entry-to-mid level of the general-purpose MCU hierarchy (MCU -> 8-bit MCU -> AVR ATmega family -> ATmega88PB). Because program Flash supports read-while-write and in-system self-programming, no external program memory is needed; firmware is updated over SPI or UART bootloaders, which is why AVR ATmega parts dominate hobby, industrial control, and low-cost embedded designs.
Key features include picoPower technology for sub-uA sleep currents, 27 general-purpose I/O lines, three flexible timer/counters with compare and PWM modes, and a USART with wake-up on start of transmission. Connectivity covers I2C (TWI), SPI, and USART, supported by 10-bit ADC channels with internal and external interrupt sources. Brown-out detection and power-on reset provide robust operation on unregulated supplies.
Architecturally, the ATmega88PB combines 32 general-purpose working registers directly connected to the ALU, allowing one-cycle execution and up to 20 MIPS throughput at 20 MHz. The picoPower silicon revision reduces consumption in idle, ADC noise reduction, power-save, and standby modes, making battery-powered designs practical without external power-gating circuitry.
Typical applications include industrial sensor nodes, consumer appliance control, lighting and motor control interfaces, and functional-safety (FuSa) supporting designs - DigiKey classifies this part under AVR ATmega Functional Safety microcontrollers. The 20 MHz ceiling and 8 KB Flash suit cost-sensitive control tasks that do not require DSP-class throughput.
When designing with the ATMEGA88PB-AUR, note the industrial temperature grade of -40C to +85C indicated by the A suffix and the T&R delivery format implied by the R suffix; plan decoupling with 100 nF ceramics at both VCC/AVCC pin pairs to keep ADC noise low.
This page synthesizes distributor pricing, drop-in family alternatives (ATMEGA88PB-ANR, ATMEGA88PA-AUR, ATMEGA168PB-AU, ATMEGA328PB-AU), and practical design notes not consolidated in the manufacturer datasheet, as of 2026-09-19.
Bộ thay thế dễ dàng lắp đặt cho ATMEGA88PB-AUR — 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 ATMEGA88PB-AUR (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status, Flash Memory, Functional Safety, Operating Temperature.
ATMEGA88PB-ANR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA88PB-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA88PA-AUR
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA88A-AU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA168PB-AU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA328PB-AU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA88PB-AUR Tỷ lệ tối đa & tính chất điện
| Core Processor | AVR |
| Core Size | 8-Bit |
| Max Clock Frequency | 20 MHz |
| Program Memory Size | 8 KB (4K x 16) FLASH |
| SRAM Size | 1 KB |
| EEPROM Size | 512 B |
| Number of I/O | 27 |
| Hộp | 32-TQFP (7x7 mm) |
| Kiểu lắp đặt | Surface Mount |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Timers/Counters | 3 flexible timer/counters with compare modes |
| ADC Resolution | 10-bit |
| Technology | picoPower |
| Temperature Grade | Industrial (-40C to +85C) |
| Functional Safety | FuSa supported (per DigiKey classification) |
| Packing | Tape & Reel (R suffix) |
Cấu hình chân ATMEGA88PB-AUR
| Chân 1 | PD3 — Port D, bit 3 (GPIO / external interrupt) |
| Chân 2 | PD4 — Port D, bit 4 (GPIO) |
| Chân 3 | GND — Ground |
| Chân 4 | VCC — Digital supply voltage |
| Chân 5 | GND — Ground |
| Chân 6 | VCC — Digital supply voltage |
| Chân 7 | PB6/XTAL1 — Port B bit 6 / crystal oscillator input / TOSC1 |
| Chân 8 | PB7/XTAL2 — Port B bit 7 / crystal oscillator output / TOSC2 |
| Chân 9 | PD5 — Port D, bit 5 (GPIO) |
| Chân 10 | PD6 — Port D, bit 6 (GPIO) |
| Chân 11 | PD7 — Port D, bit 7 (GPIO) |
| Chân 12 | PB0 — Port B, bit 0 (GPIO) |
| Chân 13 | PB1 — Port B, bit 1 (GPIO) |
| Chân 14 | PB2 — Port B, bit 2 (GPIO / SS) |
| Chân 15 | PB3/MOSI — Port B bit 3 / SPI Master Out Slave In |
| Chân 16 | PB4/MISO — Port B bit 4 / SPI Master In Slave Out |
| Chân 17 | PB5/SCK — Port B bit 5 / SPI serial clock |
| Chân 18 | AVCC — ADC supply voltage |
| Chân 19 | ADC6 — Analog input channel 6 |
| Chân 20 | AREF — Analog reference voltage |
| Chân 21 | GND — Ground |
| Chân 22 | ADC7 — Analog input channel 7 |
| Chân 23 | PC0/ADC8 — Port C bit 0 / analog channel 8 |
| Chân 24 | PC1/ADC9 — Port C bit 1 / analog channel 9 |
| Chân 25 | PC2/ADC10 — Port C bit 2 / analog channel 10 |
| Chân 26 | PC3/ADC11 — Port C bit 3 / analog channel 11 |
| Chân 27 | PC4/SDA — Port C bit 4 / I2C data / ADC12 |
| Chân 28 | PC5/SCL — Port C bit 5 / I2C clock / ADC13 |
| Chân 29 | PC6/RESET — Port C bit 6 / Reset (active low) |
| Chân 30 | PD0/RXD — Port D bit 0 / USART receive |
| Chân 31 | PD1/TXD — Port D bit 1 / USART transmit |
| Chân 32 | PD2 — Port D, bit 2 (GPIO / external interrupt) |
Ứng dụng tiêu biểu
ATMEGA88PB-AUR phù hợp cho 6 Áp dụngs: Industrial Sensor Nodes, Consumer Appliance Control, Lighting and Motor Control Interfaces, Battery-Powered IoT Endpoints, Functional Safety Supporting Logic, Test and Measurement Fixtures.
Industrial Sensor Nodes
The ATMEGA88PB-AUR fits industrial sensor nodes because its picoPower modes cut average current to microamp levels between 10-bit ADC sampling events, and its industrial -40C to +85C rating survives factory-floor temperature swings. In a typical node, the SPI interface reads an ADC or sensor IC, the USART forwards data to a wired or wireless link, and brown-out detection keeps state integrity on unregulated 24 V-derived rails. The 8 KB Flash accommodates protocol stacks such as Modbus RTU with margin, and three timer/counters generate PWM for local actuation without external components, reducing BOM cost in distributed I/O deployments.
Được đề xuất
Consumer Appliance Control
Appliance control boards choose the ATMEGA88PB-AUR because the 8 KB Flash, 1 KB SRAM, and 512 B EEPROM cover button debouncing, display driving, and configuration storage in a single 32-TQFP costing around one dollar at volume (as of 2026-09-19). The 27 GPIO lines directly drive seven-segment displays, relays, and encoder inputs; PWM outputs from the three timer/counters control heater or motor power levels. The brown-out detector and power-on reset guarantee predictable restarts after mains dips, while in-system self-programming lets production lines flash firmware over a two-wire interface without removing the MCU from the assembled board.
Được đề xuất
Lighting and Motor Control Interfaces
For LED lighting and small motor control, the ATMEGA88PB-AUR generates up to three independent PWM channels from its timer/counters, enabling dimming curves and simple speed control with no external PWM IC. The 20 MHz clock gives 8-bit PWM resolutions with kilohertz carrier frequencies that stay above audible range, and compare-mode interrupts support closed-loop current sensing through the 10-bit ADC. PicoPower standby modes let luminaires meet no-load standby regulations, dropping controller consumption to microamps when the lamp is off but the mains-connected supply must remain vigilant for wireless wake or wall-switch events.
Được đề xuất
Battery-Powered IoT Endpoints
Battery IoT endpoints benefit from the ATMEGA88PB-AUR's picoPower architecture: power-down sleep current, wake-on-USAT start-of-transmission, and pin-change interrupts allow the MCU to sleep between radio events for years on a lithium cell. The USART bridges to a low-power radio module or UART-based LPWAN modem, while SPI drives the RF transceiver directly. With 8 KB Flash, a lightweight protocol such as MQTT-SN or a custom frame stack fits comfortably; EEPROM stores device identity and calibration. The industrial temperature grade and brown-out supervision maintain reliable operation as battery voltage sags toward end-of-life discharge thresholds.
Được đề xuất
Functional Safety Supporting Logic
DigiKey classifies the ATMEGA88PB-AUR within the AVR ATmega Functional Safety (FuSa) microcontroller grouping, and Microchip provides safety documentation packages for the AVR ATmega family. In safety-adjacent subsystems the part performs watchdog-supervised heartbeat monitoring, sensor plausibility checks, and safe-state actuation: the hardware WDT forces reset if firmware hangs, while compare-mode timers implement independent time-base cross-checks. The 8 KB Flash is sufficient for the diagnostics-and-voting code layer, and dual-use of the brown-out detector plus a supply supervisor covers both under- and over-voltage fault paths required in layered safety architectures.
Được đề xuất
Test and Measurement Fixtures
Production test fixtures and bench instruments use the ATMEGA88PB-AUR as a low-cost sequencing and telemetry controller. SPI streams results to a host PC over the USART at 20 MHz-derived baud rates, the 10-bit ADC logs rail voltages during DUT power-up, and GPIO lines gate relays and signal paths. USB-serial bridges convert the USART for host connectivity. Because the TQFP-32 footprint is shared with ATMEGA168PB and ATMEGA328PB, a single fixture PCB can be populated with more Flash-capable parts when test scripts grow, protecting the hardware investment across product generations without layout changes.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATMEGA88PB-AUR — 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 | ATMEGA88PB-ANR | ATMEGA88PA-AUR | ATMEGA168PB-AU | ATMEGA328PB-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 |
| Program Flash | 8 KB | 8 KB | 8 KB | 16 KB | 32 KB |
| Max Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Low-Power Technology | picoPower | picoPower | picoPower (PA revision) | picoPower | picoPower |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| Packing Format | Tape & Reel | Tray | Tape & Reel | Tape & Reel | Tape & Reel |
Bảo phân biệt quan trọng
- picoPower silicon revision for lowest sleep current (vsATMEGA88A-AU)
- Same footprint with 2x-4x Flash upgrade path (vsATMEGA328PB-AU)
- Cost-optimized entry point of the megaAVR PB family (vsATMEGA168PB-AU)
Ghi chú thiết kế
Decouple both VCC pairs (pins 4 and 6) and AVCC (pin 18) with 100 nF ceramic capacitors placed within 3 mm of each pin, plus one bulk 4.7 uF to 10 uF per supply domain. Tie AVCC to VCC through an LC filter (10 uH + 100 nF) when ADC accuracy matters; AVCC must never be left floating even if the ADC is unused. Connect GND pins 3, 5, and 21 to a solid ground pour to minimize ground bounce across the three return paths.
Leverage picoPower modes for battery designs: power-down sleep with pin-change or watchdog wake gives the lowest average current, while idle mode keeps timers running for PWM-off-state applications. Disable the digital input buffers of analog-only pins (ADC6, ADC7) via the DIDR registers to cut unnecessary switching current. Estimated: even small mA-level leakage from unconfigured floating inputs can dominate a microamp sleep budget, so set every unused GPIO as output-low or input-with-pullup during init.
PC6 (pin 29) doubles as active-low RESET; never use it as GPIO unless your design tolerates losing high-voltage (12 V) parallel programming - keep the external 10 k pullup. PB6/PB7 default to the crystal function; if used as GPIO, fuse settings must select the internal RC oscillator. When migrating from ATMEGA88PA-AUR, review the PB I/O multiplexing table in the Microchip online documentation, as a few alternate peripheral pin mappings differ between the PA and PB revisions.
Thông tin tuân thủ
Distributor listings describe the part as GRN (green/RoHS-compliant packaging); Mouser snippet lists 'TQFP GRN'. Full REACH and conflict-minerals declarations should be confirmed on the Microchip product page.
