ATTINY9-MAH - 8-Bit 12MHz AVR with 1KB Flash | Microchip
MPN: ATTINY9-MAH ✓ ActiveATTINY9-MAH Overview
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.
Drop-in alternatives for ATTINY9-MAH — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
ATTINY9-MAHR
✅ Drop-In📋 Reference alternative (not in catalog)
ATTINY9-MAH Maximum Ratings & Electrical Characteristics
| 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 |
| Package | 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 Pin Configuration Guide
Pin configuration for ATTINY9-MAH (8-ufdfn exposed-pad package 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 ATTINY9-MAH.
Refer to the datasheet for full pin configuration.
Typical Applications
ATTINY9-MAH is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for ATTINY9-MAH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Documented same-device packaging alternative (vs ATTINY9-MAHR)
- Compact flash-based control (vs ATMEGA8A-MU)
- Dedicated timing resources for a compact MCU (vs N76E003AT20)
Design Notes
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.
Compliance Information
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.
