ATTINY426-SU - 20MHz tinyAVR 2 MCU, 4KB Flash | Microchip
MPN: ATTINY426-SU ✓ NakahandaATTINY426-SU Ulas
A microcontroller is a semiconductor that combines a CPU, nonvolatile program memory, working memory, and peripherals on one integrated circuit. The ATTINY426 belongs to the tinyAVR 2 family, which sits within Microchip's AVR 8-bit architecture. Compared with larger application-specific processors, this device provides a compact platform for reading sensors, controlling actuators, sequencing operations, and communicating through serial interfaces while conserving board area and system power.
The device combines 4 KB of Flash for firmware, 512 bytes of SRAM for working data, and 128 bytes of EEPROM for nonvolatile parameter storage. Its maximum 20 MHz operating frequency supports faster control-loop execution than lower-frequency microcontrollers, while the hardware multiplier accelerates multiply operations. The 2.5 V, 3.3 V, and 5 V operating options allow the same device family to address both industrial and low-voltage consumer equipment.
The ATTINY426 family uses Microchip's flexible, low-power tinyAVR 2 architecture and includes an Event System according to the family datasheet. The architecture is intended for embedded designs that require event-driven control, compact timing resources, and a balance between processing throughput and power efficiency. The SOIC package also offers a mechanically accessible alternative to very-small VQFN and SSOP options when inspection or hand assembly is important.
Typical applications include industrial control modules, building-automation endpoints, compact sensor-hub controllers, LED lighting controllers, motor-control auxiliaries, and low-power IoT nodes. Its combination of serial communications, EEPROM, and moderate SRAM is especially useful in compact products that must retain calibration values or configuration information through a power interruption.
PCB implementation should preserve short return paths for digital signals, provide appropriate local decoupling at the supply pins, and route sensitive analog or communications interfaces away from high-current switching nodes. Firmware should also remain within the 4 KB Flash and 512-byte SRAM limits, with interrupt service routines and stack use checked during resource planning.
This page combines the manufacturer's core electrical and memory specifications with practical application guidance, package details, datasheet references, and design considerations. It focuses on engineering decisions that help engineers assess whether the ATTINY426-SU provides enough performance, memory, and peripheral capability without moving to a larger microcontroller architecture.
Mga alternatibo na pwedeng ilagay na ATTINY426-SU — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok ATTINY426-SU (parehas na form factor at footprint) — pagkakaiba sa Flash Memory, Product Type, CPU Architecture, Maximum Operating Temperature, Package.
ATTINY427
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
ATTINY424-XF
✅ Drop-In ⚠️ Mga Talaan Hindi NaiwerikmoMagkontak para sa presyo
Tingnan ang Datasheet →ATTINY824
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
ATTINY826-SU
✅ Drop-In ⚠️ Mga Talaan Hindi NaiwerikmoMagkontak para sa presyo
Tingnan ang Datasheet →ATTINY827-MU
✅ Drop-In ⚠️ Mga Talaan Hindi NaiwerikmoMagkontak para sa presyo
Tingnan ang Datasheet →ATTINY426-SU Mga Pinakamataas na Rating at Electrical Characteristics
| Product Type | 8-bit RISC microcontroller |
| Architecture | AVR CPU with hardware multiplier |
| Series | tinyAVR 2 |
| Maximum CPU Frequency | 20 MHz |
| Flash Memory | 4 KB (4K x 8) |
| SRAM | 512 bytes |
| EEPROM | 128 bytes |
| Operating Voltage | 2.5 V, 3.3 V, or 5 V |
| Maximum Operating Temperature | 85 °C |
| Packhaging | 20-pin SOIC |
| Uri ng Pagpapasok | Surface mount |
| Tube Packing | Tube |
| Hardware Multiplier | Yes |
| Event System | Yes |
Gabay sa Pin Configuration ng ATTINY426-SU 20-pin soic
Pin configuration para sa ATTINY426-SU (20-pin soic package). Kasama sa digital IC na ito ang GPIO, mga communication interface (UART, SPI, I2C), at mga power pin. Sumangguni sa datasheet ng manufacturer para sa mga alternatibong function ng pin at mga opsyon sa configuration. Mahalaga para sa disenyo ng embedded system at PCB layout.
Wala ng detalyadong pinout data na magagamit para sa ATTINY426-SU.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
ATTINY426-SU ay nararapat para sa 6 aplikasyons: Compact Industrial Control Module, Low-Power IoT Sensor Node, LED Lighting Controller, Building Automation Endpoint, Motor Control Auxiliary, Serial Data Acquisition Controller.
Compact Industrial Control Module
The ATTINY426-SU fits compact industrial control modules where a 20 MHz AVR CPU provides useful response speed without the overhead of a larger processor. Its 4 KB Flash can hold a focused control application, 512 bytes of SRAM supports short working sets, and 128 bytes of EEPROM preserves configuration values such as calibration coefficients or operating limits. The 2.5 V, 3.3 V, and 5 V operating options support varied sensor and actuator rails. Place local decoupling at the power pins, retain clean return paths for digital inputs, and validate timing against the worst-case peripheral activity before deploying the module in a high-interference industrial enclosure.
Inirekomenda
Low-Power IoT Sensor Node
The ATTINY426-SU is appropriate for low-power IoT sensor nodes that periodically sample inputs, evaluate thresholds, and transmit compact status information. Its 8-bit 20 MHz processor handles event-driven control while the 512-byte SRAM accommodates bounded sensor processing and communication buffers. The 128-byte EEPROM can store node identifiers, calibration offsets, or configuration values that must survive reset. A duty-cycled design should place the MCU in its applicable low-power mode between measurements, use the Event System for deterministic peripheral interactions, and verify wake-up timing and active-current limits in the final power budget.
Inirekomenda
LED Lighting Controller
The ATTINY426-SU can serve as the central controller in a compact LED lighting module that requires deterministic switching, dimming sequences, and configurable behavior. Its hardware-multiplier AVR CPU runs up to 20 MHz, which supports time-based PWM and effect sequencing within the 4 KB Flash and 512-byte SRAM envelope. EEPROM can retain scene definitions or user settings across power cycles. The SOIC package provides solderable thermal-pad-free construction for accessible production assembly. Validate LED current limits, channel transition timing, thermal rise, and separation between switching outputs and sensitive control nets in the final power stage and PCB design.
Inirekomenda
Building Automation Endpoint
The ATTINY426-SU suits building-automation endpoints that combine a digital sensor input with a local actuator or serial gateway. Its 3.3 V operating option aligns with low-voltage sensor networks, while 5 V support accommodates equipment using a 5 V control rail. The 20 MHz CPU can service multiple event-driven tasks, and the Event System helps connect peripherals without excessive polling. Use the 128-byte EEPROM carefully for persistent settings rather than general storage. Keep mains-derived or high-energy interfaces isolated from the controller, maintain adequate creepage and segregation where required, and validate restart behavior after power interruption.
Inirekomenda
Motor Control Auxiliary
The ATTINY426-SU can implement supervisory or auxiliary functions in a compact motor-control assembly, such as position sensing, limit detection, fault reporting, or communication bridging. The hardware multiplier assists time-critical arithmetic, and the 20 MHz clock provides headroom for coordinated peripheral events. It is best suited as a supervisory controller rather than the sole device driving a high-current motor stage. External drivers should handle power switching, current limiting, and fault shutdown. Validate encoder bandwidth, noise immunity, timing margins, and separation between motor-switching nodes and sensitive sensor inputs before using the microcontroller inside a variable-speed drive.
Inirekomenda
Serial Data Acquisition Controller
The ATTINY426-SU is suitable for a small serial acquisition controller that gathers sensor readings, applies basic filtering, and forwards results through a serial interface. The 20 MHz AVR CPU and hardware multiplier support efficient arithmetic, while the 4 KB Flash and 512-byte SRAM favor tightly scoped acquisition loops. A bounded sample buffer can feed periodic serial reporting without requiring a larger MCU. Engineers should calculate worst-case acquisition, processing, and transmission time at the target clock, limit interrupt nesting where timing is critical, and isolate communications from noisy analog sections. EEPROM is appropriate for calibration metadata but not for high-rate sample storage.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for ATTINY426-SU — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | ATTINY427 | ATTINY424 | ATTINY824 | ATTINY826 | ATTINY827 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SOIC | 20-pin SOIC | 20-pin SOIC | 20-pin SOIC | 20-pin SOIC | 20-pin SOIC |
| CPU Architecture | 8-bit AVR with hardware multiplier | 8-bit AVR with hardware multiplier | 8-bit AVR with hardware multiplier | 8-bit AVR with hardware multiplier | 8-bit AVR with hardware multiplier | 8-bit AVR with hardware multiplier |
| Maximum Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Flash Memory | 4 KB | 8 KB | 4 KB | 4 KB | 4 KB | 8 KB |
| SRAM | 512 bytes | 1 KB | 512 bytes | 512 bytes | 512 bytes | 1 KB |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Operating Voltage | 2.5 V, 3.3 V, or 5 V | 2.5 V, 3.3 V, or 5 V | 2.5 V, 3.3 V, or 5 V | 2.5 V, 3.3 V, or 5 V | 2.5 V, 3.3 V, or 5 V | 2.5 V, 3.3 V, or 5 V |
| Series | tinyAVR 2 | tinyAVR 2 | tinyAVR 2 | tinyAVR 2 | tinyAVR 2 | tinyAVR 2 |
Pangunahing mga Pagkakaiba
- Lower memory requirement for focused control designs (kumpara saATTINY427)
- Same 20 MHz hardware-multiplier AVR performance class (kumpara saATTINY424)
- Accessible 20-pin SOIC assembly option (kumpara saATTINY824)
- Compact memory footprint without reduced maximum clock (kumpara saATTINY827)
Talaan ng Disenyo
Place the device-specific input, output, and supply decoupling capacitors close to their corresponding pins, with short ground-return paths and a continuous ground reference beneath the device where layout rules permit. Route serial signals away from switching nodes and external power-stage traces. The 20-pin SOIC footprint is larger and more inspectable than the family's VQFN and SSOP options, but it still requires adequate copper around adjacent pins to avoid accidental solder bridges during manual assembly.
Design the supply rail for the selected 2.5 V, 3.3 V, or 5 V operating condition and include margin for the complete attached circuit, not only the microcontroller. Check brownout and restart behavior if configuration data is stored in EEPROM. Use the manufacturer electrical-characteristics table to set input thresholds and operating limits. Avoid hot-plugging assumptions or supply transients outside the device limits without external protection and filtering.
Treat the 4 KB Flash, 512-byte SRAM, and 128-byte EEPROM as hard design limits. Include compiler-generated code size, interrupt vectors, stack depth, and any bootloader in the Flash budget, and reserve SRAM for the stack and peripheral buffers. Do not use EEPROM for frequently changing working data because write endurance is limited. When moving among ATTINY424, ATTINY426, ATTINY427, ATTINY824, ATTINY826, or ATTINY827, verify register definitions and peripheral availability rather than assuming identical behavior.
For timing-sensitive interfaces, calculate setup, hold, propagation, and interrupt-latency margins using the actual 20 MHz maximum clock and peripheral configuration. Keep crystal or clock traces short and symmetric, maintain continuous ground adjacent to high-speed nets, and avoid routing sensitive inputs parallel to power-converter or motor-switching currents. Validate signal behavior across process, voltage, and temperature corners instead of relying only on nominal-condition measurements.
Impormasyon ng Pagsunod sa Kautusan
The distributor listing identifies ATTINY426-SU as Green and indicates RoHS compliance. Other compliance declarations were not established for the exact orderable device and remain unknown.