ATTINY441-MU - 16MHz 8-bit AVR MCU 4KB Flash | Microchip Technology
料号： ATTINY441-MU ✓ 量产中ATTINY441-MU 概述
The ATtiny441 belongs to the TinyAVR family of 8-bit AVR microcontrollers. An AVR microcontroller is an embedded processing IC that integrates a CPU core, program memory, data memory, I/O, and peripherals into a single device. In the broader product hierarchy, ATTINY441-MU is a microcontroller, an integrated circuit, and a semiconductor intended for control-oriented embedded systems.
Verified distributor data identifies the device as an AVR ATtiny microcontroller operating up to 16 MHz, with 4 KB organized as 4K x 8 flash. It is offered in a 20-QFN-EP package measuring 4 x 4 mm. The exposed pad provides the package with a central thermal and electrical land, making careful PCB layout important for both assembly and heat transfer.
The ATtiny441 family is suitable for compact industrial control, embedded automation, sensor conditioning, lighting control, and low-cost consumer products. Its 8-bit architecture is appropriate for sequential control, digital I/O handling, and low-bandwidth peripheral tasks rather than graphics-intensive or high-throughput applications.
When designing a board around ATTINY441-MU, use a 4 x 4 mm QFN land pattern with an exposed-pad-aware footprint and verify the manufacturer pin assignment before layout release. Place decoupling close to the power pins and follow the manufacturer guidance for programming, clocking, and exposed-pad construction.
This product page consolidates verified distributor and manufacturer information, package details, sourcing references, and engineering selection guidance. It is intended to help engineers identify the correct ATtiny441-MU package, compare related devices, and plan a manufacturable embedded-control design.
直接替换替代料： ATTINY441-MU ——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： ATTINY441-MU （相同外形与封装尺寸） ——差异在于 Flash Memory, Maximum Clock Frequency, Package.
ATTINY44A-MFR
✅ 直接替换📋 参考替代料（不在目录中）
ATTINY24A-MUR
✅ 直接替换📋 参考替代料（不在目录中）
ATTINY441-MUR
✅ 直接替换📋 参考替代料（不在目录中）
ATTINY441-MU 最大额定值与电气特性
| Microcontroller Family | AVR ATtiny |
| Architecture | 8-bit |
| 最大时钟频率 | 16 MHz |
| Flash Memory | 4 KB (4K x 8) |
| 封装 | 20-QFN-EP (4 x 4 mm) |
| 引脚数 | 20 pins |
| 安装类型 | Surface mount |
| Supply Voltage Options | 1.8 V, 2.5 V, 3.3 V, and 5 V |
| Manufacturer Programming Tool Support | MPLAB PICkit 5 supported |
| Core Family | TinyAVR |
| Device Type | 8-bit microcontroller |
| Program Memory Organization | 4K x 8 words |
| Package Thermal Land | Exposed pad |
ATTINY441-MU exposed pad 引脚配置指南
ATTINY441-MU（exposed pad 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： ATTINY441-MU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATTINY441-MU 适用于 6 应用s: Industrial Automation Control, Sensor Conditioning Node, LED Lighting Controller, USB-to-Serial Interface, Battery-Powered Remote Control, Consumer Appliance Interface.
Industrial Automation Control
The ATTINY441-MU fits compact industrial automation modules that require local sequencing, digital I/O, and a small controller footprint. Its 8-bit AVR architecture runs at up to 16 MHz and provides 4 KB of flash for control firmware, while the 20-QFN-EP package limits board area in distributed sensor and actuator nodes. Using the device close to the controlled equipment can shorten signal paths and reduce the need for a larger centralized controller. The 4 x 4 mm exposed-pad package still demands careful PCB layout and thermal design. Engineers should verify the required GPIO, timers, analog channels, supply voltage, and programming interface in the manufacturer documentation before fixing the MCU selection.
推荐
Sensor Conditioning Node
The ATTINY441-MU is suitable for a small sensor-conditioning node that acquires a digital or limited analog signal and converts it into a control or communications output. The 16 MHz maximum clock provides the operating headroom for typical sequential processing, and 4 KB of flash supports compact embedded firmware. Its 20-QFN-EP package is useful where connector and enclosure space is constrained. The principal engineering trade-off is limited memory relative to larger MCUs, so buffering, protocol complexity, and logging should be kept within the device's verified SRAM, EEPROM, and peripheral capabilities. Confirm the ADC, comparator, timer, serial-interface, and supply-voltage requirements before final component approval.
推荐
LED Lighting Controller
The ATTINY441-MU can act as a compact LED lighting controller for status indicators, architectural strips, or simple dimming modules. Its 8-bit AVR core executes control sequences at up to 16 MHz, while 4 KB of flash can hold timing, fading, and operating-mode logic. The small 20-QFN-EP footprint is valuable in space-constrained luminaires and controller modules. PWM capability, current-driving topology, flicker behavior, and thermal performance must be matched to the selected LED arrangement rather than assumed from the 16 MHz headline frequency. Verify the available timer outputs and comparator resources from the manufacturer datasheet, and keep the MCU supply and ground return separated from high-current LED paths to reduce switching noise coupling.
推荐
USB-to-Serial Interface
The ATTINY441-MU can support a compact USB-to-serial adapter when a suitable USB transceiver implementation is added. The MCU's 8-bit architecture and 16 MHz clock are adequate for basic data forwarding, control, and status handling, while its 4 KB flash constrains protocol and firmware complexity. The QFN package helps reduce adapter size but increases assembly and inspection demands because of the exposed pad. A production design should use the manufacturer-supported USB interface arrangement or an approved external transceiver and should include the required clock, filtering, protection, and connector components. USB enumeration, suspend behavior, ESD protection, and host compatibility require validation independently of the basic MCU specification.
推荐
Battery-Powered Remote Control
The ATTINY441-MU is applicable to a small battery-powered remote or handheld controller where the design benefits from an 8-bit processor, modest flash memory, and a compact 4 x 4 mm package. It can manage button inputs, indicator states, and simple actuator outputs within a constrained board area. The device supports 1.8 V, 2.5 V, 3.3 V, and 5 V supply options according to the verified comparison data, which allows alignment with different power architectures. However, actual sleep current, active current, analog behavior, and battery life are not available in the supplied snippets and must be confirmed from the manufacturer data. Low-power design also requires attention to pull states, external component leakage, and board contamination.
推荐
Consumer Appliance Interface
The ATTINY441-MU can serve as a secondary controller in a compact consumer appliance where a simple front panel, sensor set, or motor actuator must be coordinated. Its 16 MHz 8-bit core and 4 KB flash support deterministic control logic without occupying the area of a larger microcontroller. The 20-QFN-EP package supports miniaturization, but the exposed-pad footprint and production inspection requirements need to be incorporated early in the mechanical and PCB schedule. Designers should partition mains-connected, high-current, and safety-sensitive circuitry from the MCU supply network. Verify the required digital and analog inputs, PWM outputs, communication peripherals, brownout behavior, and operating temperature before releasing the design for production.
推荐
推荐产品汇总
工程参考数据： ATTINY441-MU ——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 | ATTINY44A-MFR | ATTINY24A-MUR | ATTINY441-MUR |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-QFN-EP (4 x 4 mm) | 20-QFN (4 x 4 mm) | 20-QFN (4 x 4 mm) | 20-pin surface-mount package |
| Architecture | 8-bit AVR | 8-bit AVR | 8-bit AVR | 8-bit AVR |
| Flash Memory | 4 KB (4K x 8) | 4 KB | 4 KB | 4 KB |
| Pin Count | 20 pins | 20 pins | 20 pins | 20 pins |
关键差异点
- Directly identified ATtiny441 ordering option （对比 ATTINY441-MUR)
- Same 8-bit, 4 KB, 16 MHz class as ATTINY44A-MFR （对比 ATTINY44A-MFR)
- 20-pin 4 x 4 mm exposed-pad package （对比 ATTINY24A-MUR)
设计说明
Treat the 20-QFN-EP footprint as an exposed-pad design rather than a generic 20-pin QFN. Use the manufacturer package drawing to set the perimeter-pad and central-pad geometry, solder-mask opening, and stencil paste pattern. Confirm the assembly process with the manufacturer before placing the board order because exposed-pad solder volume, void control, and the method used to connect the pad electrically to the ground or supply plane can materially affect both inspection and thermal performance.
Keep the ATTINY441-MU supply path short and place the required local decoupling at the device pins using the values and placement rules in the manufacturer datasheet. The verified listings support operation at 1.8 V, 2.5 V, 3.3 V, and 5 V, but do not provide the current limits or decoupling requirements. Route high-current switching and LED paths away from the MCU supply loop, and verify the power source's startup behavior, ripple, and ground return against the device's actual electrical limits.
Do not assume that similarly named ATtiny devices are firmware- or footprint-compatible. Compare the exact pin table, memory map, SRAM, EEPROM, peripheral channels, fuse options, and exposed-pad connection of ATTINY441-MU against any proposed substitute. The supplied search data identifies ATTINY44A-MFR, ATTINY24A-MUR, and ATTINY441-MUR as related comparison candidates, but it does not provide a complete compatibility matrix. Require manufacturer documentation and a hardware regression test before substitution.
The 4 x 4 mm exposed-pad package provides a thermal path, but its effectiveness depends on the PCB copper and thermal design. Use the manufacturer package and thermal information to determine whether the exposed pad connects to ground, a supply rail, or another specified net. Maintain the recommended copper area and consider the pad's electrical role when planning isolation, noise control, and heat-generating adjacent components. Do not derive junction temperature or required copper area without verified thermal-resistance data.
合规信息
The supplied verified snippets identify the manufacturer, package, clock, memory, and purchasing information but do not provide explicit compliance declarations. No compliance status has been inferred.
