ATTINY9-MAH - 8-Bit 12MHz AVR with 1KB Flash | Microchip
MPN： ATTINY9-MAH ✓ 啟用中ATTINY9-MAH 概覽
A microcontroller is a programmable integrated circuit that executes firmware to monitor inputs, control outputs, and manage system timing. In the broader semiconductor hierarchy, this device is an 8-bit microcontroller, part of the AVR family, and belongs to the embedded-control and power-management design ecosystem. The ATTINY9 is positioned for small control tasks where low memory capacity, low pin count, and simple timing are more important than a large peripheral set or high processing bandwidth.
Verified specifications include 1 KB of program Flash, 32 bytes of SRAM, four I/O lines, a 12 MHz maximum speed, an internal oscillator, and a 16-bit timer/counter with two PWM channels. The manufacturer page also identifies 16 general-purpose working registers and power-on reset, PWM, and watchdog-related functionality. These resources support compact control loops, simple indicator systems, basic motor or actuator timing, and low-power embedded products.
The 8-UFDFN package helps reduce board area compared with larger leaded or plastic packages, but its exposed pad and fine-pitch footprint require careful PCB layout, land-pattern verification, soldering controls, and thermal-via planning. Because the provided data does not specify the complete electrical operating range, pin names, memory-retention behavior, or detailed timing characteristics, those parameters are marked as needing verification rather than inferred.
Typical uses include small sensor interfaces, simple timers, compact LED or indicator controllers, low-cost consumer accessories, and basic embedded control modules. The device is most appropriate when firmware and I/O requirements are modest and the board can be designed around its 1 KB Flash and 32-byte SRAM limits. For designs needing more memory, communication peripherals, or a larger package pin count, a different ATtiny device should be evaluated.
For a new design, confirm the exact UFDFN footprint, exposed-pad connection, programming method, oscillator behavior, and device-specific electrical limits against the official Microchip documentation before layout release. This page combines verified distributor specifications with engineering guidance, while clearly separating confirmed data from parameters that require manufacturer-datasheet confirmation.
直接替換替代品，適用於 ATTINY9-MAH — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
ATTINY9-MAHR
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查看資料表 →ATTINY9-MAH 最大額定值與電氣特性
| Product Type | 8-bit AVR RISC-based microcontroller |
| Core | AVR |
| Maximum Clock Speed | 12 MHz |
| Program Flash Memory | 1 KB (512 x 16) |
| SRAM | 32 B |
| General-Purpose I/O Lines | 4 |
| General-Purpose Working Registers | 16 |
| Timer/Counter | 16-bit timer/counter |
| PWM Channels | 2 |
| Oscillator Type | Internal |
| 封裝 | 8-UFDFN exposed-pad package |
| Packaging | Bulk |
| Architecture | RISC-based |
| Instruction Set | AVR |
| Data Word Width | 8-bit |
| Programming Memory Type | ISP Flash |
| Peripheral Feature | Power-on reset, PWM, watchdog timer |
ATTINY9-MAH 8-ufdfn exposed-pad package 腳位配置指南
ATTINY9-MAH（8-ufdfn exposed-pad package 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATTINY9-MAH.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATTINY9-MAH 適用於 6 應用s: Simple LED and Indicator Control, Compact Sensor Interface, Small Motor and Actuator Control, Battery-Powered Household Accessory, Basic Timing and Pulse Generation, Compact Consumer Control Module.
Simple LED and Indicator Control
ATTINY9-MAH fits compact LED panels, status indicators, and low-cost accessory controls because its four I/O lines can drive discrete logic or indicator stages while the 16-bit timer/counter supports repeatable timing. The two PWM channels can provide basic brightness or blink-rate modulation without requiring a larger MCU. The internal oscillator simplifies the clock circuit, but firmware must fit within 1 KB Flash and working data within 32 bytes SRAM. Use resistor-limited drive or an external transistor when current exceeds the verified I/O capability.
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Compact Sensor Interface
ATTINY9-MAH can serve as a small sensor-state controller when the sensor output is simple and the firmware does not require high memory capacity. Its four I/O lines provide a limited interface for digital control signals, while the timer/counter can manage sampling windows or debounce timing. The 12 MHz AVR core executes the control loop, but only 1 KB Flash and 32 bytes SRAM are confirmed, so buffers must remain minimal. Verify input thresholds, pin multiplexing, and power-supply limits in the exact datasheet before connecting external sensors.
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Small Motor and Actuator Control
ATTINY9-MAH is appropriate for basic actuator sequencing, small fan stages, or relay-control logic when the timing requirements are modest. Its 16-bit timer/counter and two PWM channels can generate deterministic control timing, while four I/O lines can interface with enable or feedback signals. The controller should use external transistor or driver circuitry for loads rather than driving motors directly from an I/O pin. Firmware and state variables must be carefully budgeted against 1 KB Flash and 32 bytes SRAM.
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Battery-Powered Household Accessory
ATTINY9-MAH can support a compact battery-powered accessory that needs simple state management, button handling, and periodic output control. The internal oscillator removes the need for an external crystal in designs that can rely on the documented timing characteristics, and the small UFDFN package helps reduce board area. Battery-life calculations should wait until active and sleep current values are verified from the manufacturer data. The small memory footprint also favors concise firmware and direct peripheral use rather than libraries or buffering-heavy application code.
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Basic Timing and Pulse Generation
ATTINY9-MAH is well suited to small timing modules, pulse shapers, and educational control boards because the 16-bit timer/counter supports longer count ranges than an 8-bit timer and the two PWM channels can produce configurable waveforms. The 12 MHz maximum clock supports deterministic control logic, while the internal oscillator can simplify the board. Confirm timer prescaling, PWM frequency, and output-drive limits against the exact datasheet because those values are not included in the supplied data. Keep the firmware within the confirmed memory capacity.
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Compact Consumer Control Module
ATTINY9-MAH can be used in a compact consumer module for button-driven functions, simple mode selection, and discrete output sequencing. Four I/O lines limit the external interface, so the design should avoid pin-heavy displays, high-speed communication, or multiple simultaneous peripherals. The internal oscillator and small package help create a low-component-count board, while the AVR architecture provides straightforward programming for small control tasks. Before production, verify programming connectors, reset behavior, exposed-pad handling, and all electrical limits against Microchip documentation.
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推薦產品摘要
工程參考資料，適用於 ATTINY9-MAH — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATTINY9-MAHR |
|---|---|---|
| Package | 8-UFDFN exposed-pad package | 8-UFDFN exposed-pad package |
| Brand | Microchip Technology | Microchip Technology |
| Core | AVR 8-bit RISC | AVR 8-bit RISC |
| Maximum Speed | 12 MHz | 12 MHz |
| Flash Memory | 1 KB (512 x 16) | 1 KB |
| SRAM | 32 B | 32 B |
| I/O Lines | 4 | 4 |
| Timer and PWM | 16-bit timer/counter with 2 PWM channels | 16-bit timer/counter with 2 PWM channels |
| Packaging Form | Bulk | Tape & Reel (TR) |
| Oscillator | Internal | Internal |
主要差異化特點
- Documented same-device packaging alternative (對比ATTINY9-MAHR)
- Compact flash-based control (對比ATMEGA8A-MU)
- Dedicated timing resources for a compact MCU (對比N76E003AT20)
設計說明
The 8-UFDFN exposed-pad footprint requires exact land-pattern matching to the Microchip package drawing. Confirm pad dimensions, pitch, exposed-pad geometry, solder-mask clearance, and paste volume before fabrication; do not substitute a generic UFDFN footprint. Keep the exposed-pad copper and thermal-via strategy compatible with the board assembly process, and validate solder paste printing with an assembly capability check because fine-pitch packages can create bridging risk.
Design the supply and decoupling around the exact ATTINY9-MAH electrical limits rather than the distributor category description. The supplied data confirms a 3 V-class listing but does not provide the complete operating-voltage range or current limits, so those values remain [DATA_NEEDED]. Place required bypass capacitors close to the device power and ground pins, verify the exposed-pad connection against the package documentation, and check startup and brownout behavior with the selected regulator before power-sequencing release.
The 1 KB Flash and 32-byte SRAM limits are unusually small and can cause avoidable redesigns. Estimate code size, stack depth, interrupt usage, and temporary variables before committing to the MCU. Prefer direct register-level peripheral access when appropriate, avoid unnecessary library buffers, and reserve margin for bootloader or programming requirements. Also confirm that four I/O pins are sufficient for the intended external interface; adding UART, SPI, or a display may force a different microcontroller family.
For PWM or timing-sensitive outputs, route signals away from noisy switching nodes and keep the ground return path short. If the device controls a motor, relay, or high-current LED driver, use external switching transistors and place their high-current paths separate from sensitive control traces. The provided data does not specify drive strength or output impedance, so do not assume the four I/O lines can directly source actuator current.
合規資訊
The supplied verified data does not provide part-specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. Compliance fields remain unknown rather than inferred from distributor listings.
