ATMEGA88A-MUR - 8-bit AVR MCU, 8KB Flash 20MHz | Microchip
料号： ATMEGA88A-MUR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.31 | $2.31 |
| 10 | $2.08 | $20.80 |
| 100 | $1.85 | $185.00 |
| 500 | $1.67 | $835.00 |
| 1,000 | $1.49 | $1,490.00 |
| 3,000 | $1.38 | $4,140.00 |
ATMEGA88A-MUR 概述
An 8-bit AVR microcontroller is a complete self-contained computing system on a single chip, combining a RISC processor core, program memory, SRAM, EEPROM, timers, and analog peripherals such as ADC and analog comparators. Microcontrollers sit at the lowest level of the embedded systems hierarchy: microcontroller -> embedded processor -> MCU families like the AVR ATmega series, which are programmed in C or assembly through development tools such as MPLAB X and AVR-GCC, and debugged in-circuit via ICSP using tools like the MPLAB SNAP.
Key features of the ATMEGA88A include 8KB ISP Flash with read-while-write capability, 512B EEPROM, 1KB SRAM, 23 general-purpose I/O lines, and 32 general-purpose working registers. The AVR enhanced RISC core executes 130 powerful instructions, most in a single clock cycle, delivering up to 20 MIPS throughput at 20MHz. The picoPower technology provides multiple sleep modes with very low active and idle power consumption.
The ATmega88A architecture includes three flexible timers/counters with compare modes (two 8-bit and one 16-bit), internal and external interrupt sources, a serial programmable USART, an SPI serial interface, a two-wire interface (I2C-compatible), an 8-channel 10-bit ADC with differential mode, and an internal calibrated RC oscillator. The wide supply voltage range of 1.8V to 5.5V supports battery-powered designs as well as 5V industrial systems.
Typical applications include industrial automation and sensor nodes, home appliance and HVAC control boards, and battery-powered portable devices where low standby power matters. The 32-VQFN (5x5 mm) package saves board area versus TQFP while retaining full peripheral access.
When designing with this device, reserve the PC6/RESET pin for in-circuit serial programming and follow the datasheet power-supply decoupling recommendations for the exposed pad.
This page synthesizes verified distributor pricing, drop-in alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet.
直接替换替代料： ATMEGA88A-MUR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATMEGA88A-MUR （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, ADC Resolution, Communication Interfaces, Flash Memory.
快速对比工具——选择替代料号进行并排对比：
ATMEGA88PA-MUR
✅ 直接替换✓ 有现货
$0.71 / 个
查看数据手册 →ATMEGA88A-MU
✅ 直接替换📋 参考替代料（不在目录中）
ATMEGA88-20MU
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →ATMEGA168A-MUR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.85 / 个
查看数据手册 →ATMEGA48PA-MUR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.98 / 个
查看数据手册 →ATMEGA88A-MUR 最大额定值与电气特性
| Core Architecture | 8-bit AVR RISC |
| Program Memory Size | 8 KB (4K x 16) Flash |
| EEPROM Size | 512 B |
| SRAM Size | 1 KB |
| Maximum Clock Speed | 20 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| General Purpose I/O | 23 I/O lines |
| Working Registers | 32 x 8-bit |
| ADC Resolution | 10-bit, 8 channels |
| Timers/Counters | Two 8-bit, one 16-bit |
| Communication Interfaces | USART, SPI, TWI (I2C-compatible) |
| 封装 | 32-VQFN (5x5 mm) with exposed pad |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (industrial) |
| Sleep Modes / Power Technology | picoPower, multiple sleep modes |
| RoHS 状态 | Compliant (green package) |
| Debug / Programming | ICSP via MPLAB SNAP (debugWIRE) |
ATMEGA88A-MUR 引脚配置
| 引脚 1 | PD3 — Port D, bit 3 (GPIO / analog comparator negative input) |
| 引脚 2 | PD4 — Port D, bit 4 (GPIO / analog comparator positive input) |
| 引脚 3 | GND — Ground |
| 引脚 4 | VCC — Digital supply voltage |
| 引脚 5 | GND — Ground |
| 引脚 6 | VCC — Digital supply voltage |
| 引脚 7 | PB6/XTAL1/TOSC1 — Port B bit 6 / crystal oscillator input / timer oscillator input |
| 引脚 8 | PB7/XTAL2/TOSC2 — Port B bit 7 / crystal oscillator output / timer oscillator output |
| 引脚 9 | PD5 — Port D, bit 5 (GPIO) |
| 引脚 10 | PD6 — Port D, bit 6 (GPIO) |
| 引脚 11 | PD7 — Port D, bit 7 (GPIO) |
| 引脚 12 | PB0 — Port B, bit 0 (GPIO / ICP1 input capture) |
| 引脚 13 | PB1 — Port B, bit 1 (GPIO / OC1A PWM output) |
| 引脚 14 | PB2 — Port B, bit 2 (GPIO / SS SPI slave select) |
| 引脚 15 | PB3/MOSI/OC2A — Port B bit 3 / SPI master output / Timer2 PWM output |
| 引脚 16 | PB4/MISO — Port B bit 4 / SPI master input |
| 引脚 17 | PB5/SCK — Port B bit 5 / SPI clock |
| 引脚 18 | AVCC — ADC supply voltage |
| 引脚 19 | ADC6 — ADC input channel 6 |
| 引脚 20 | AREF — ADC analog reference |
| 引脚 21 | GND — Ground |
| 引脚 22 | ADC7 — ADC input channel 7 |
| 引脚 23 | PC0/ADC0 — Port C bit 0 / ADC channel 0 |
| 引脚 24 | PC1/ADC1 — Port C bit 1 / ADC channel 1 |
| 引脚 25 | PC2/ADC2 — Port C bit 2 / ADC channel 2 |
| 引脚 26 | PC3/ADC3 — Port C bit 3 / ADC channel 3 |
| 引脚 27 | PC4/ADC4/SDA — Port C bit 4 / ADC channel 4 / TWI data |
| 引脚 28 | PC5/ADC5/SCL — Port C bit 5 / ADC channel 5 / TWI clock |
| 引脚 29 | PC6/RESET — Reset input / debugWIRE pin |
| 引脚 30 | PD0/RXD — Port D bit 0 / USART receive |
| 引脚 31 | PD1/TXD — Port D bit 1 / USART transmit |
| 引脚 32 | PD2/INT0 — Port D bit 2 / external interrupt 0 |
典型应用
ATMEGA88A-MUR 适用于 6 应用s: Industrial Automation and Sensor Nodes, Home Appliance Control, Battery-Powered Portable Devices, Motor Control (Small DC and Stepper), Embedded HMI and Display Control, Hobby, Maker, and Educational Boards.
Industrial Automation and Sensor Nodes
The ATMEGA88A-MUR fits factory floor sensor nodes because its industrial temperature rating, 1.8V to 5.5V supply tolerance, and 10-bit ADC allow direct connection of analog transducers without external conversion. The SPI and TWI interfaces link to external EEPROM or network transceivers, while the 16-bit Timer/Counter1 generates PWM for actuator control. Its picoPower sleep modes let battery-backed nodes idle at microamp-level current between polling cycles. With 8KB Flash, a Modbus-style UART protocol plus sensor conditioning firmware fits comfortably; if the application grows, the pin-compatible ATMEGA168A-MUR doubles program memory with no PCB change.
推荐
Home Appliance Control
Appliance and HVAC control boards benefit from the ATMEGA88A-MUR's robust 5V operation, 23 GPIO lines, and multiple PWM-capable timers. A typical design drives triac or relay outputs from GPIO, reads NTC temperature sensors through the 10-bit ADC, and handles user buttons and LED indicators on the remaining ports. The internal calibrated RC oscillator removes the crystal from cost-sensitive boards, and the watchdog timer plus brown-out detection improve safety in mains-powered environments. Because 20 MIPS at 20MHz is far above the compute need of most appliance loops, the core spends most time in idle sleep, reducing conducted EMI and power consumption on standby rails.
推荐
Battery-Powered Portable Devices
For portable and coin-cell powered products, the ATMEGA88A-MUR's picoPower architecture with multiple sleep modes and a 1.8V low-end supply range extends battery life. The device wakes from sleep on external interrupts or watchdog timeouts, samples a sensor through the 10-bit ADC, and transmits over USART or TWI before returning to sleep. Operating at reduced clock near 1.8V keeps the system within the frequency-versus-VCC safe operating curve. The 512B EEPROM preserves calibration data through battery replacement. Designers targeting maximum sleep efficiency should consider the pin-compatible ATMEGA88PA-MUR, whose P-die further reduces active and idle consumption.
推荐
Motor Control (Small DC and Stepper)
The ATMEGA88A-MUR controls small DC motors and steppers using PWM outputs from its 8-bit and 16-bit timers driving external MOSFET or H-bridge drivers. The 10-bit differential ADC reads shunt current or back-EMF feedback, and input capture on Timer1 can decode encoder or Hall signals with hardware timestamping. At 20MHz, a closed-loop PI controller runs at kilohertz rates with large margin. The wide 1.8V to 5.5V supply allows the MCU to share the logic rail of the gate driver. For applications requiring CAN or a programmable serial controller, Microchip's ATmega64M1 family provides an upgrade path within the same AVR ecosystem.
推荐
Embedded HMI and Display Control
The ATMEGA88A-MUR serves as a keypad scanner and display controller for small embedded HMIs. Twenty-three GPIO lines drive a multiplexed seven-segment or character LCD arrangement and read a matrix keypad, while the USART or TWI port talks to a host processor or an OLED driver chip. Its 8KB Flash comfortably holds a lookup-table font, menu state machine, and serial protocol. The 16-bit timer generates backlight PWM dimming with hardware, offloading the core. In a typical split-HMI architecture, this MCU handles the real-time user interface locally while sleeping in idle mode between key events, keeping standby draw low on always-on appliances.
推荐
Hobby, Maker, and Educational Boards
The ATMEGA88A family is a staple of maker and educational platforms because it is inexpensive, programmable via a low-cost ISP cable or MPLAB SNAP, and supported by the mature AVR-GCC and Arduino-compatible toolchains. The 32-VQFN (5x5 mm) MUR variant suits compact student PCBs, while the same silicon in DIP (ATMEGA88A-PU) supports breadboard teaching. The debugWIRE feature enables single-wire in-circuit debugging on the reset pin, which teaches professional workflows without extra pins. The internal RC oscillator, power-on reset, and brown-out detector mean a minimal working board needs only decoupling capacitors - ideal for first embedded design coursework.
推荐
推荐产品汇总
工程参考数据： ATMEGA88A-MUR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATMEGA88PA-MUR | ATMEGA88A-MU | ATMEGA88-20MU | ATMEGA168A-MUR | ATMEGA48PA-MUR |
|---|---|---|---|---|---|---|
| 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 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 8 KB | 8 KB | 8 KB | 8 KB | 16 KB | 4 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 512 B |
| EEPROM | 512 B | 512 B | 512 B | 512 B | 512 B | 256 B |
| Maximum Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.7 V to 5.5 V (per original die) | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Power Optimization | picoPower-class (A revision) | picoPower (P die) - lowest current | picoPower-class (A revision) | original die, higher sleep current | picoPower-class (A revision) | picoPower (P die) |
| Packaging Format | Tape & Reel (R suffix) | Tape & Reel | Standard tray/tube qty | Standard tray/tube qty | Tape & Reel | Tape & Reel |
关键差异点
- picoPower sleep architecture （对比 ATMEGA88-20MU)
- Upgrade path to double Flash without PCB change （对比 ATMEGA168A-MUR)
- Cost reduction path for simpler firmware （对比 ATMEGA48PA-MUR)
- Automated assembly packaging （对比 ATMEGA88A-MU)
设计说明
Clock frequency must derate with supply voltage: full 20MHz operation is only guaranteed at 4.5V to 5.5V per the ATmega88A datasheet frequency-versus-VCC curve. If your design runs at 3.3V, limit the system clock to the curve's safe region (roughly 10MHz class) or accept a fuse-verified lower clock. Enable the brown-out detector (BOD) via fuses so the MCU does not execute code corruptly during supply droop - critical in 5V appliance designs with slow-railing power supplies.
Connect AVCC (pin 18) to VCC through a low-pass RC network (typical 10 ohm / 100 nF) when ADC accuracy matters, and keep analog traces to ADC0-7 and AREF away from the SPI and USART switching lines. The exposed pad on the 32-VQFN should be soldered to a ground pour for mechanical reliability and thermal dissipation - it is the main ground return for the die. Place 100 nF decoupling capacitors at both VCC pins (4 and 6) within 2 mm of the pads.
PC6/RESET is used by debugWIRE for in-circuit debugging; do not connect external pull-up circuitry that fights the single-wire debug driver until firmware is stable. Reserve the 6-pin ICSP header (VCC, GND, RESET, SCK PB5, MOSI PB3, MISO PB4) on every production board, since field firmware updates require it. Also remember the A-revision fuse defaults: clock source fuses must be programmed before switching from the internal RC oscillator to external crystal, or the device may become unreachable.
At 20MHz and 5V with all 23 GPIOs driving capacitive loads, estimated dynamic current can approach the datasheet active-mode maximum, but the 32-VQFN exposed pad with a solid ground pour keeps junction rise minimal (well under 20C at typical 50 mA-class consumption, using estimated theta_JA values in still air). No heatsinking is required for normal operation; the main thermal consideration is solder-joint quality on the exposed pad, verified by X-ray for high-reliability assemblies.
合规信息
Distributor listings identify the package as Green (Microchip green designation, per FindIC listing: MLF/QFN, Ind Temp, Green, T&R). REACH and conflict minerals status not stated in provided data.
