ATMEGA4808-MF - 8-bit AVR MCU 20MHz 48KB Flash QFN-32 | Microchip
料号： ATMEGA4808-MF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.26 | $2.26 |
| 10 | $2.1 | $21.00 |
| 100 | $1.95 | $195.00 |
| 500 | $1.8 | $900.00 |
| 1,000 | $1.7 | $1,700.00 |
ATMEGA4808-MF 概述
A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals such as timers, communication interfaces, and analog-to-digital converters. The megaAVR 0-series sits within Microchip's 8-bit MCU portfolio, positioned above the tinyAVR series and below the 32-bit SAM series, and is a common choice for embedded control, consumer, and industrial products.
Key features include a 20 MHz AVR CPU with hardware multiplier, 48 KB of self-programmable Flash with a separate EEPROM for non-volatile data storage, a 10-bit ADC with 12 external channels, and multiple communication peripherals including USART, SPI, and TWI (I2C) interfaces. According to the Microchip product page, the ATmega4808 is offered in 28- and 32-pin packages, with the MF suffix denoting the 32-pin VQFN in industrial temperature range.
The AVR core executes most instructions in a single clock cycle, delivering efficient C-code performance and low interrupt latency. Hardware support for events, configurable custom logic, and flexible timers (TCA/TCB/TCD in the megaAVR 0-series architecture) allow many tasks to run without CPU intervention, reducing power consumption in sleep-heavy applications. A unified address space and a single-cycle hardware multiplier simplify math-intensive firmware.
Typical applications include consumer appliances, industrial sensing nodes, HVAC controls, and general-purpose embedded boards - the ATmega4808 is also widely cited as a modern successor to the classic ATmega328P used in Arduino platforms, and is supported by the open-source MegaCoreX Arduino hardware package.
Design considerations: the VQFN-32 footprint requires careful PCB land-pattern design, and the UPDI programming interface replaces legacy ISP, so programmers must support one-wire UPDI. Verify the operating voltage range against your power rail before layout.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-18.
直接替换替代料： ATMEGA4808-MF ——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： ATMEGA4808-MF （相同外形与封装尺寸） ——差异在于 Core Processor, Programming Interface, Flash Memory, SRAM, Package.
快速对比工具——选择替代料号进行并排对比：
ATMEGA3208-MF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.98 / 个
查看数据手册 →ATMEGA1608-MF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.94 / 个
查看数据手册 →ATMEGA808-MF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.95 / 个
查看数据手册 →ATMEGA4808-MFR
✅ 直接替换✓ 有现货
$0.82 / 个
查看数据手册 →ATMEGA4808-MF 最大额定值与电气特性
| Core Architecture | 8-bit AVR RISC with hardware multiplier |
| 最大时钟频率 | 20 MHz |
| Flash Memory | 48 KB (24K x 16) |
| SRAM | 6 KB |
| EEPROM | 256 bytes |
| 封装 | 32-VFQFN (5x5 mm) |
| ADC Resolution | 10-bit |
| ADC Channels | 12 external channels |
| 工作温度 | -40C to +105C (industrial, MF suffix) |
| Communication Interfaces | USART, SPI, TWI (I2C) |
| Timers | 16-bit TCA, TCB, TCD (megaAVR 0-series) |
| Programming Interface | UPDI (Unified Program and Debug Interface) |
| 安装类型 | Surface Mount |
| Family | megaAVR 0-series (AVR mega) |
| RoHS 状态 | Compliant |
ATMEGA4808-MF 32-vfqfn (5x5 mm) 引脚配置指南
ATMEGA4808-MF（32-vfqfn (5x5 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： ATMEGA4808-MF.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA4808-MF 适用于 6 应用s: Industrial Sensor Nodes, Consumer Appliance Control, HVAC and Building Control, Arduino-Compatible Prototyping, Lighting and PWM Control Systems, IoT End Nodes.
Industrial Sensor Nodes
The ATMEGA4808-MF fits industrial sensing nodes where a 10-bit ADC with 12 external channels digitizes multiple analog sensors on one chip, and the 48 KB Flash accommodates protocol stacks and data logging. Its -40C to +105C industrial temperature range covers control-cabinet and outdoor environments, while Core Independent Peripherals time-accurately sample and generate waveforms without CPU load. Firmware typically uses USART or TWI to forward readings to a PLC gateway; the 20 MHz AVR core handles both acquisition and communications with margin.
推荐
Consumer Appliance Control
Washing machines, coffee makers, and small appliances need low-cost MCUs with robust timer and ADC resources - the ATMEGA4808-MF delivers both in a compact 32-pin VQFN. Multiple hardware timers drive motors, heaters, and user-interface LEDs with precise PWM, while the 10-bit ADC reads temperature sensors and user potentiometers. The 256-byte EEPROM stores calibration and user settings through power cycles. At roughly $2.26 single-unit pricing as of 2026-09-18, it meets aggressive consumer BOM targets while providing 48 KB Flash for future firmware expansion.
推荐
HVAC and Building Control
HVAC controllers benefit from the ATMEGA4808-MF's combination of industrial temperature rating (-40C to +105C), multiple USART/TWI interfaces for connecting humidity and temperature sensors, and hardware PWM for fan and damper motor control. The 6 KB SRAM supports state-machine-based control logic and buffering for LCD user interfaces. Sleeping between control cycles keeps average current low in thermostat-style products, and the UPDI interface enables field reprogramming through a single wired test point on production boards.
推荐
Arduino-Compatible Prototyping
The ATMEGA4808 is a recognized modern successor to the ATmega328P in hobbyist and prototyping contexts. The open-source MegaCoreX Arduino hardware package provides full Arduino IDE support for ATmega4808, ATmega4809, and related megaAVR 0-series parts, letting designers leverage the Arduino ecosystem while gaining 48 KB Flash, 20 MHz performance, and UPDI debugging. Community analyses highlight that it is not register-compatible with the 328P, so libraries using direct port access need porting - but standard Arduino API sketches port readily.
推荐
Lighting and PWM Control Systems
LED drivers and dimming controllers use the ATMEGA4808-MF's TCA/TCB/TCD timer suite to generate phase-correct and high-resolution PWM outputs without CPU intervention, leaving the 20 MHz core free for communication and button handling. The 10-bit ADC reads ambient light sensors, potentiometers, or thermal feedback from LED boards, enabling closed-loop brightness and thermal foldback. The 48 KB Flash holds color-mixing algorithms and DMX-style serial receivers, and the QFN-32 package fits compact LED driver PCBs.
推荐
IoT End Nodes
In battery- and mains-powered IoT end nodes, the ATMEGA4808-MF acts as the sensor/aggregation controller that sleeps between events, samples the 10-bit ADC on wake, and streams data over USART or SPI to a wireless module. The megaAVR 0-series event system and configurable peripherals reduce wake latency and CPU overhead, extending battery life. The 256-byte EEPROM stores device identity and calibration data, while 48 KB Flash retains room for OTA-style bootloader code alongside the application image.
推荐
推荐产品汇总
工程参考数据： ATMEGA4808-MF ——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 | ATMEGA3208-MF | ATMEGA1608-MF | ATMEGA808-MF | ATMEGA4808-MFR |
|---|---|---|---|---|---|
| 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 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 48 KB | 32 KB | 16 KB | 8 KB | 48 KB |
| SRAM | 6 KB | 4 KB | 2 KB | 1 KB | 6 KB |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| ADC | 10-bit, 12 ch | 10-bit, 12 ch | 10-bit, 12 ch | 10-bit, 12 ch | 10-bit, 12 ch |
| Programming Interface | UPDI | UPDI | UPDI | UPDI | UPDI |
关键差异点
- Largest Flash in the 32-pin megaAVR 0-series family （对比 ATMEGA3208-MF)
- Lowest-cost footprint-compatible variants available （对比 ATMEGA808-MF)
- Modern UPDI single-wire debug （对比 ATMEGA328P-PU (legacy))
设计说明
The 32-pin VQFN (5x5 mm) package requires a precise land pattern per the datasheet package outline. Solder the exposed die-attach pad to a ground plane through an array of 4-6 vias to achieve both thermal dissipation and a low-inductance ground return. Use a solder-paste stencil aperture reduction of roughly 10-20% on fine 0.5 mm-pitch pads to prevent bridging during reflow, and confirm the paste profile against the MSL rating printed on the moisture-barrier bag.
The ATmega4808 programs via UPDI only - there is no legacy ISP. Ensure every production PCB exposes the UPDI pin (PA0) on a test point or header, and stock a UPDI-capable programmer (MPLAB Snap, PICkit 4, Atmel-ICE, or a serial UPDI adapter). Firmware written with direct port/register access for the ATmega328P will not compile unchanged; MegaCoreX Arduino support eases migration but does not provide register-level compatibility.
Estimated: place a 100 nF ceramic decoupling capacitor directly across each VDD pin pair, within 2-3 mm of the package, plus one bulk 4.7-10 uF capacitor per supply rail. Verify the final supply rail against the datasheet operating voltage range (mark [DATA_NEEDED] above) before layout sign-off, and confirm brown-out detector settings in fuses so the MCU does not execute corrupted code during slow supply ramps.
合规信息
RoHS compliance inferred from Microchip standard product labeling on distributor listings; AEC-Q100 automotive qualification is not claimed for this part (use ATMEGA32M1 family for automotive). Verify REACH and conflict-minerals status on Microchip's official compliance pages.
