ATMEGA88PB-AN - 8KB AVR MCU 20MHz TQFP-32 | Microchip
MPN: ATMEGA88PB-AN ✓ Hoạt độngATMEGA88PB-AN Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip processor that integrates a CPU core, program memory, data memory, and peripherals such as timers, UARTs, and ADCs on one die. Within the semiconductor hierarchy it belongs to the embedded processor family: microcontroller -> embedded MCU -> semiconductor integrated circuit. AVR is the classic Harvard-architecture RISC family originally developed by Atmel, now part of Microchip Technology, and the ATmega line is its mid-range tier between the ATtiny and the higher-memory ATmega328/644 series.
Key features include Microchip picoPower technology for sub-uA sleep currents, a USART with wake-up on start condition, three flexible timer/counters with compare modes, a 10-bit ADC with internal 1.1V/2.56V references, a byte-oriented two-wire interface (TWI/I2C), SPI, and an analog comparator. Functional Safety (FuSa) documentation support is available, and the device is rated to 105C ambient (Mouser: TQFP, 105C, GREEN).
The AVR core executes most instructions in a single clock cycle through a two-stage pipeline with 32 general-purpose working registers, giving deterministic timing valued in industrial control. Read-while-write Flash allows the self-programming bootloader to run while erasing or writing program memory.
Typical applications include industrial sensor nodes, consumer appliance controls, battery-powered meters, HVAC controls, and general embedded control boards where the ATmega88 family is a de-facto standard, including Arduino-compatible designs.
Design-wise, keep VCC and AVCC decoupled with 100 nF ceramics close to pins 4/6 and 18, and plan the pin 29 RESET pin for ISP programming via the 6-pin ICSP header supported by MPLAB SNAP or PICkit programmers.
This page synthesizes distributor pricing, same-brand drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATMEGA88PB-AN — 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-AN (cùng hình factor và footprint) — khác nhau ở Package, Flash Memory, RoHS Status, Operating Temperature, ADC.
ATMEGA88PA-ANR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA88PA-AUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA88A-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA88-20AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA168PB-AU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA88PB-AN Tỷ lệ tối đa & tính chất điện
| Core | AVR 8-bit RISC |
| Core Size | 8-bit |
| Max Clock Frequency | 20 MHz |
| Flash Memory | 8 KB (4K x 16), ISP, read-while-write |
| EEPROM | 512 B |
| SRAM | 1 KB |
| I/O Lines | 27 |
| Working Registers | 32 general purpose |
| Timers/Counters | 3 (with compare modes) |
| Communication Interfaces | USART, SPI, TWI (I2C) |
| Hộp | 32-TQFP (7x7 mm), A suffix |
| Kiểu lắp đặt | Surface Mount |
| Low Power Technology | picoPower |
| Functional Safety Support | Yes (FuSa) |
| Programming Interface | ICSP (ISP), supported by MPLAB SNAP |
| Trạng thái RoHS | GREEN (per Mouser listing) |
Cấu hình chân ATMEGA88PB-AN
| Chân 1 | PD3 — Port D, bit 3 (GPIO / PCINT19) |
| Chân 2 | PD4 — Port D, bit 4 (GPIO / PCINT20 / XCK/T0) |
| 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 (GPIO / XTAL1 / TOSC1 / PCINT6) |
| Chân 8 | PB7 — Port B, bit 7 (GPIO / XTAL2 / TOSC2 / PCINT7) |
| Chân 9 | PD5 — Port D, bit 5 (GPIO / T1 / PCINT21) |
| Chân 10 | PD6 — Port D, bit 6 (GPIO / AIN0 / PCINT22) |
| Chân 11 | PD7 — Port D, bit 7 (GPIO / AIN1 / PCINT23) |
| Chân 12 | PB0 — Port B, bit 0 (GPIO / ICP1 / CLKO / PCINT8) |
| Chân 13 | PB1 — Port B, bit 1 (GPIO / OC1A / PCINT9) |
| Chân 14 | PB2 — Port B, bit 2 (GPIO / SS / OC1B / PCINT10) |
| Chân 15 | PB3 — Port B, bit 3 (GPIO / MOSI / OC2A / PCINT11) |
| Chân 16 | PB4 — Port B, bit 4 (GPIO / MISO / PCINT12) |
| Chân 17 | PB5 — Port B, bit 5 (GPIO / SCK / PCINT13) |
| Chân 18 | AVCC — ADC supply voltage |
| Chân 19 | ADC6 — ADC input channel 6 |
| Chân 20 | AREF — ADC analog reference |
| Chân 21 | GND — Ground |
| Chân 22 | ADC7 — ADC input channel 7 |
| Chân 23 | PC0 — Port C, bit 0 (GPIO / ADC0 / PCINT14) |
| Chân 24 | PC1 — Port C, bit 1 (GPIO / ADC1 / PCINT15) |
| Chân 25 | PC2 — Port C, bit 2 (GPIO / ADC2 / PCINT16) |
| Chân 26 | PC3 — Port C, bit 3 (GPIO / ADC3 / PCINT17) |
| Chân 27 | PC4 — Port C, bit 4 (GPIO / ADC4 / SDA / PCINT18) |
| Chân 28 | PC5 — Port C, bit 5 (GPIO / ADC5 / SCL / PCINT19) |
| Chân 29 | PC6 — RESET (active-low, also GPIO if RSTDISBL fused) |
| Chân 30 | PD0 — Port D, bit 0 (GPIO / RXD / PCINT16) |
| Chân 31 | PD1 — Port D, bit 1 (GPIO / TXD / PCINT17) |
| Chân 32 | PD2 — Port D, bit 2 (GPIO / INT0 / PCINT18) |
Ứng dụng tiêu biểu
ATMEGA88PB-AN phù hợp cho 6 Áp dụngs: Industrial Sensor Nodes, Consumer Appliance Control, Battery-Powered Meters and Remote Sensors, Hobbyist and Arduino-Compatible Boards, HVAC and Building Automation, Automotive Auxiliary Non-Safety Electronics.
Industrial Sensor Nodes
The ATMEGA88PB-AN fits industrial sensor nodes because its 27 GPIO lines, 10-bit ADC, TWI and SPI interfaces connect analog sensors and digital buses directly, while picoPower sleep modes keep battery or energy-harvesting nodes alive for long service intervals. A typical node reads a sensor through I2C or SPI, applies local filtering with the 1 KB SRAM, and reports over USART RS-485 or a radio module, all scheduled by the three timer/counters. Operating to 105C suits control cabinets and outdoor enclosures, and Functional Safety (FuSa) support eases documentation for monitored industrial equipment.
Được đề xuất
Consumer Appliance Control
Appliance front-boards - cooktop interfaces, fan controls, dispenser units - use the ATMEGA88PB-AN because the AVR core's single-cycle execution delivers deterministic button-scan and relay-timing loops at 20 MHz, while 8 KB Flash holds state machines, LED multiplexing, and UI logic comfortably. The internal 8 MHz RC oscillator and internal ADC references remove external components, cutting BOM cost on high-volume boards, and the 512 B EEPROM stores calibration and user settings through power cycles. GREEN, RoHS-compliant TQFP-32 construction supports lead-free mass-assembly lines typical of appliance contract manufacturers.
Được đề xuất
Battery-Powered Meters and Remote Sensors
The ATMEGA88PB-AN serves battery-powered metering through picoPower technology: power-down sleep with watchdog wake-up keeps average current at uA levels, extending coin-cell or lithium primary life to years. The USART wake-on-start-of-transmission feature lets a radio or wired link wake the MCU only when data arrives, and pin-change interrupts wake on user interaction without polling. A typical design sleeps with only the RTC timer active, samples a metering input via the 10-bit ADC every few seconds, and transmits in bursts. The 1.8V floor allows full use of a discharging cell.
Được đề xuất
Hobbyist and Arduino-Compatible Boards
The ATmega88 family is a de-facto standard in open-source embedded platforms, and the ATMEGA88PB-AN drops directly onto Arduino-compatible TQFP-32 layouts. Hobbyists program it over ICSP with an Arduino-as-ISP or MPLAB SNAP using the same SPI programming pins (MOSI/MISO/SCK/RESET) found on UNO-class boards, and existing ATmega88/328 bootloaders port with minor memory-size constants. The 27 GPIO and three timers support shields, robotics, and LED projects, while sub-$1 volume pricing makes class kits and workshop batches economical. Community toolchains (avr-gcc, Arduino IDE) fully support the PB generation.
Được đề xuất
HVAC and Building Automation
Thermostats, damper controllers, and zone-control boards use the ATMEGA88PB-AN for its combination of a 10-bit ADC (for NTC temperature sensing and 0-10V feedback via dividers), timer/PWM outputs for triac or SSR drive, and TWI bus for display and expansion modules. The 105C ambient rating tolerates control-box environments near heating equipment, and the internal 1.1V/2.56V references enable ratiometric sensor measurement without external references. picoPower idle modes keep always-on thermostats within energy-standard budgets, while the EEPROM preserves setpoints and schedules across power outages without battery backup.
Được đề xuất
Automotive Auxiliary Non-Safety Electronics
The ATMEGA88PB-AN appears in auxiliary vehicle electronics - lighting sequencers, gauge drivers, accessory controllers - where the wide supply tolerance, watchdog timer, and brown-out detector maintain robust operation with ignition transients, and the 105C rating covers cabin and engine-bay-adjacent enclosures. Its USART with wake-on-start suits LIN-style polled links when combined with a transceiver, and timer input-capture decodes variable-frequency sensors directly. FuSa (Functional Safety) support documentation assists tier suppliers integrating the device into monitored subsystems, though qualification-level requirements should always be verified against the specific OEM standard.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATMEGA88PB-AN — 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 | ATMEGA88PA-AN | ATMEGA88PA-AUR | ATMEGA88A-AU | ATMEGA88-20AU | 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 | 32-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 16 KB (2x) |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| EEPROM | 512 B | 512 B | 512 B | 512 B | 512 B | 512 B |
| Low Power Technology | picoPower (PB generation) | picoPower (PA generation) | picoPower (PA generation) | No picoPower | No picoPower | picoPower (PB generation) |
| Generation / Family | ATmega88PB (latest 88 generation) | ATmega88PA | ATmega88PA | ATmega88A | ATmega88 (original) | ATmega168PB |
Bảo phân biệt quan trọng
- Latest ATmega88 generation with picoPower (vsATMEGA88A-AU)
- Functional Safety (FuSa) documentation support (vsATMEGA88-20AU)
- Direct memory upgrade path on the same footprint (vsATMEGA168PB-AU)
Ghi chú thiết kế
Decouple VCC (pins 4/6) and AVCC (pin 18) with 100 nF X7R ceramics placed within 2 mm of each pin, plus one 4.7-10 uF bulk capacitor per supply rail. Tie AVCC to VCC through an LC filter (10 uH + 100 nF) when the ADC is used in noisy environments, and never leave AVCC unconnected even if the ADC is unused - the datasheet requires AVCC within 0.3 V of VCC. Connect pin 21 GND directly to a solid ground pour rather than a long trace.
Reserve the standard 6-pin ICSP header (MOSI PB3, MISO PB4, SCK PB5, RESET PC6, VCC, GND) on every production board even if field programming is not planned - in-circuit reprogramming via MPLAB SNAP or AVR ISP tools is the primary recovery path for firmware updates and bricked units. Keep the RESET trace short and add a 10 kOhm pull-up to VCC plus optional 100 nF to GND for noise immunity in electrically harsh environments, as spurious resets are the most common field failure mode.
When migrating between ATmega88 generations (88/88A/88PA/88PB), recompile firmware and review the device datasheet migration sections rather than reflashing the same binary: peripheral base registers are largely identical but feature bits and calibration bytes differ, and Microchip app note AVR094 ('Replacing ATmega8 by ATmega88') documents family migration methodology. Also note PB-generation picoPower sleep currents differ from PA - re-measure battery budget after substitution, and verify EEPROM retention code paths since EEPROM timing may vary slightly across generations.
Estimated: at 5 V and 20 MHz full-speed active operation, an ATmega88-class device draws roughly 5-6 mA, dissipating about 25-30 mW - negligible thermally for the TQFP-32 (theta JA around 100 C/W class, temperature rise under 3 C). The design constraint is sleep-mode average current, not power dissipation: budget uA-class power-down current plus watchdog wake-up duty cycle. Estimated: a node sleeping 99% of the time at 1 uA and active 1% at 5 mA averages about 51 uA, giving roughly 2 years on a 900 mAh cell.
Thông tin tuân thủ
Mouser lists the device as 'TQFP, 105C, GREEN' - Microchip GREEN designation indicates RoHS-compliant, lead-free, halogen-free construction. REACH and conflict-minerals declarations not stated in provided data.
