ATMEGA4808-MF - 8-bit AVR MCU 20MHz 48KB Flash QFN-32 | Microchip
MPN: ATMEGA4808-MF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 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 Overview
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.
Drop-in alternatives for ATMEGA4808-MF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATMEGA4808-MF (same form factor and footprint) — differing in Core Processor, Programming Interface, Flash Memory, SRAM, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA3208-MF
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.98 / Unit
View Datasheet →ATMEGA1608-MF
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.94 / Unit
View Datasheet →ATMEGA808-MF
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.95 / Unit
View Datasheet →ATMEGA4808-MFR
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →ATMEGA4808-MF Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR RISC with hardware multiplier |
| Maximum Clock Frequency | 20 MHz |
| Flash Memory | 48 KB (24K x 16) |
| SRAM | 6 KB |
| EEPROM | 256 bytes |
| Package | 32-VFQFN (5x5 mm) |
| ADC Resolution | 10-bit |
| ADC Channels | 12 external channels |
| Operating Temperature | -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) |
| Mounting Type | Surface Mount |
| Family | megaAVR 0-series (AVR mega) |
| RoHS Status | Compliant |
ATMEGA4808-MF 32-vfqfn (5x5 mm) Pin Configuration Guide
Pin configuration for ATMEGA4808-MF (32-vfqfn (5x5 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATMEGA4808-MF.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA4808-MF is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA4808-MF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Largest Flash in the 32-pin megaAVR 0-series family (vs ATMEGA3208-MF)
- Lowest-cost footprint-compatible variants available (vs ATMEGA808-MF)
- Modern UPDI single-wire debug (vs ATMEGA328P-PU (legacy))
Design Notes
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.
Compliance Information
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.
