ATTINY5-MAH - 12MHz 512B AVR Microcontroller | Microchip
料号： ATTINY5-MAH ✓ 量产中ATTINY5-MAH 概述
An AVR microcontroller is a small RISC-based embedded controller used to read inputs, execute firmware, and drive outputs in compact electronic systems. The ATTINY5 belongs to the TinyAVR family, combining a processor core, Flash memory, SRAM, registers, timers, and I/O in one integrated device. Its small package and modest memory footprint make it useful for dedicated control functions rather than general-purpose computing.
Verified features include 512 bytes of Flash memory organized as 256 x 16 bits, 32 bytes of SRAM, four I/O pins, a 16-bit timer/counter with two PWM channels, 16 general-purpose working registers, power-on reset, watchdog timer, and PWM support. The verified distributor listing identifies a 12 MHz core and a 1.8 V to 5.5 V supply range.
The ATTINY5-MAH uses the AVR architecture and an 8-UDFN package with an exposed pad according to the supplied product listings. The exposed-pad construction and limited pin count demand careful PCB layout, thermal-pad soldering, and signal-routing attention. The device is suitable for simple motor, lighting, sensor, and low-cost control products where firmware fits within the available memory.
Typical uses include small motor controllers, LED drivers, sensor nodes, simple keypads, and compact consumer accessories. Its 12 MHz speed provides useful timing headroom, while four I/O lines constrain designs that need more external signals. A designer should verify package-specific pin mapping and programming requirements against the manufacturer datasheet before layout release.
This page consolidates the verified distributor specifications, sourcing information, package identity, and design constraints into an engineering reference. Pricing, availability, lifecycle status, and detailed electrical limits should be reconfirmed with the manufacturer or authorized distributor before production procurement.
直接替换替代料： ATTINY5-MAH ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
ATTINY5-MAHR
✅ 直接替换📋 参考替代料（不在目录中）
ATTINY5-MAH 最大额定值与电气特性
| Core | AVR 8-bit RISC-based CMOS |
| Maximum Core Speed | 12 MHz |
| Program Memory | 512 bytes Flash (256 x 16 bits) |
| SRAM | 32 bytes |
| Supply Voltage Range | 1.8 V to 5.5 V |
| General-Purpose I/O | 4 lines |
| Working Registers | 16 |
| Timer/Counter | 16-bit timer/counter with 2 PWM channels |
| Power-On Reset | Supported |
| Watchdog Timer | Supported |
| Connectivity | No connectivity listed in verified data |
| Programming Memory Type | Flash |
| 封装 | 8-UDFN, USON |
| 安装类型 | Surface mount |
ATTINY5-MAH 8-udfn, uson 引脚配置指南
ATTINY5-MAH（8-udfn, uson 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： ATTINY5-MAH.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATTINY5-MAH 适用于 6 应用s: Simple Motor Speed Control, LED Dimmer and Lighting Controller, Low-Cost Sensor Node, Compact Consumer Accessory Controller, Battery-Powered Embedded Device, Simple Security or Access-Control Module.
Simple Motor Speed Control
The ATTINY5-MAH fits a basic motor-speed controller because its 16-bit timer/counter and two PWM channels can generate a controllable duty-cycle signal at up to the verified 12 MHz core speed. The MCU can interpret a start, stop, or speed command and drive the control input of an external transistor or motor-driver stage. Its four I/O lines should be allocated carefully for command input, PWM output, and status. The controller is suitable only when motor current, voltage, and transient requirements remain outside the MCU's direct drive capability.
推荐
LED Dimmer and Lighting Controller
ATTINY5-MAH can control a compact LED-lighting product using its two verified PWM channels and four available I/O lines. Firmware can map a button, rotary input, or external command to brightness and operating-state changes, while a transistor or LED driver handles current that the microcontroller cannot safely supply directly. The 1.8 V to 5.5 V supply range supports low-voltage systems, although LED-current limits, switching transients, and thermal performance must be checked outside the MCU. A common-ground layout and appropriate driver decoupling are important.
推荐
Low-Cost Sensor Node
The ATTINY5-MAH is suitable for a dedicated sensor node when the measured signal can be reduced to a few digital inputs and the firmware remains within 512 bytes of Flash memory. Its four I/O lines can support a sensor output, threshold or mode signal, and a status indicator, while the 12 MHz AVR core provides basic timing and control. The supplied data does not confirm an ADC, so analog sensing would require an external converter or a specifically verified device variant. Low-power performance must be measured because the verified material does not provide sleep-current data.
推荐
Compact Consumer Accessory Controller
ATTINY5-MAH can implement a small accessory controller such as a keypad interface, mode selector, or simple actuator sequencer. The 32-byte SRAM and 512-byte Flash capacity encourage a tightly scoped firmware design, while four I/O lines provide enough parallel control for a limited peripheral set. A state-machine-based program can debounce inputs and sequence outputs without an external memory device. Engineers should avoid adding high-speed communications or large UI logic without checking memory and peripheral availability, because the verified data does not identify a UART, wireless interface, or large on-chip memory.
推荐
Battery-Powered Embedded Device
ATTINY5-MAH may fit a small battery-powered embedded device when its supply voltage is within the verified 1.8 V to 5.5 V range and the product does not require a radio or large firmware image. The MCU can handle a simple power-management state machine, sensor sampling, and actuator control through its limited I/O. Actual battery suitability depends on operating current, sleep current, regulator efficiency, and wake-up behavior, none of which are specified in the supplied data. Prototype the power budget before committing to a battery enclosure or energy-harvesting design.
推荐
Simple Security or Access-Control Module
ATTINY5-MAH can serve as a small access-control sequencer for a limited number of switches, indicators, or lock-control signals. Its 12 MHz core and watchdog support are useful for basic deterministic control, while the 4 I/O lines impose a strict need for pin budgeting and possibly an external I/O expander. The device is more appropriate for a simple local actuator controller than a networked security product because wireless or wired communications are not confirmed in the verified data. Validate fail-safe behavior and power-loss response independently of the MCU.
推荐
推荐产品汇总
工程参考数据： ATTINY5-MAH ——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 | ATTINY5-MAHR |
|---|---|---|
| Core Architecture | AVR 8-bit RISC | AVR 8-bit RISC |
| Maximum Core Speed | 12 MHz | 12 MHz |
| Flash Memory | 512 bytes (256 x 16 bits) | 512 bytes |
| SRAM | 32 bytes | 32 bytes |
| Package | 8-UDFN, USON | 8-UDFN, USON |
| Brand | Microchip Technology | Microchip Technology |
关键差异点
- Compact AVR control with two PWM channels （对比 ATTINY5-MAHR)
- Low-voltage operating range （对比 ATTINY5-MAHR)
- Minimal-footprint embedded design （对比 ATTINY5-MAHR)
设计说明
Route the 8-UDFN footprint exactly from the current Microchip package drawing and verify whether the exposed pad is electrically connected, thermally required, or both. Keep programming and debug access reachable for rework, and place decoupling close to the device power pins. Because the package has only four listed general-purpose I/O lines, perform pin allocation before committing to the board outline.
Design the supply for the verified 1.8 V to 5.5 V range and account for startup current, output-pin loading, and external-driver transients. The supplied data does not provide current-consumption limits or absolute-maximum ratings, so use the manufacturer datasheet for regulator headroom and decoupling values. Do not power high-current motors or LED strings directly from MCU pins; use a transistor or driver stage.
Do not assume that every ATtiny-family member has identical peripherals, pin names, or package suffixes. The verified listing confirms 512 bytes of Flash, 32 bytes of SRAM, four I/O lines, timer/PWM, watchdog, and power-on reset, but it does not confirm ADC, UART, or wireless functions. Validate the exact ATTINY5-MAH pinout and programming requirements against current Microchip documentation.
合规信息
The supplied verified snippets do not provide authoritative compliance statements for ATTINY5-MAH. Compliance fields are therefore recorded as unknown.
