ATTINY826-SF - 20MHz 8KB AVR MCU | Microchip Technology
部品番号: ATTINY826-SF ✓ 生産中ATTINY826-SF 概要
An 8-bit microcontroller is a semiconductor that executes embedded instructions from nonvolatile program memory while using RAM for working data and EEPROM for values that must survive power loss. The ATTINY826-SF belongs to the tinyAVR 2 family, which extends the AVR architecture with hardware multiplication, event-based timing, and low-power operating modes for embedded-control applications.
Key device attributes include a 20 MHz maximum clock frequency, 8 KB of Flash program memory, 1 KB of SRAM, and 128 bytes of EEPROM. Its 20-pin SOIC package is identified by the ATTINY826-SF ordering code, while the related ATTINY826-SFR product uses 20-SOIC packaging notation. The industrial-temperature indication supports designs expected to operate up to 125 degrees Celsius.
The AVR core provides an 8-bit RISC architecture with a hardware multiplier, allowing efficient multiplication operations without software emulation. Separate program memory, static working memory, and byte-sized EEPROM give embedded firmware a clear division between code, operating state, and persistent configuration. Low-power behavior is supported by an 8 MHz low-power mode at a minimum supply voltage of 2.7 V, according to the product description for this exact device.
Typical uses include compact industrial controllers, sensor-conditioning systems, appliance control modules, low-power instrumentation, and embedded motor or relay interfaces. The combination of 20 MHz processing speed and 1 KB SRAM is particularly useful for small control loops, digital I/O expansion, communication peripherals, and local parameter storage without introducing a larger processor or memory subsystem.
PCB design should follow the manufacturer pinout and recommended decoupling guidance in the ATtiny826 documentation. Confirm the exact SOIC-20 land pattern, programming interface, clock configuration, and peripheral assignments before layout release. Production firmware should also include the appropriate brownout, watchdog, and reset settings to improve behavior during supply disturbances.
This page combines the exact ATTINY826-SF characteristics with same-package replacement analysis, application guidance, and practical design notes. It also identifies which memory and pinout details require confirmation in the Microchip documentation before production substitution.
ドロップイン代替品: ATTINY826-SF — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
ATTINY827-SFR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ATTINY824-SFR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ATTINY426-SFR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ATTINY427-SFR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ATTINY826-SF 最大定格＆電気的特性
| CPU Architecture | 8-bit AVR RISC with hardware multiplier |
| Maximum CPU Frequency | 20 MHz |
| Flash Program Memory | 8 KB |
| SRAM | 1 KB |
| EEPROM | 128 bytes |
| Low-Power Clock | 8 MHz at 2.7 V minimum supply |
| Minimum Supply Voltage | 2.7 V |
| パッケージ | 20-pin SOIC |
| ピン数 | 20 pins |
| 実装タイプ | Surface Mount |
| Industrial Temperature Grade | Up to 125 degrees Celsius |
| Product Environmental Designation | Green |
ATTINY826-SF 20-pin soic ピン配置ガイド
ATTINY826-SF (20-pin soic パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: ATTINY826-SF.
詳細は データシート をご参照ください。
主な用途
ATTINY826-SF の用途: 6 件s: Industrial Sensor Conditioning, Low-Power IoT Control Node, Appliance Control Module, Embedded Motor and Relay Interface, Precision Measurement Front End, LED Lighting Controller.
Industrial Sensor Conditioning
The ATTINY826-SF fits compact industrial sensor-conditioning modules because its 20 MHz AVR core provides useful processing speed while the tinyAVR 2 architecture supports low-power operation. Its 8 KB Flash can hold acquisition routines, calibration logic, filtering, and communication handling, while 1 KB of SRAM supports temporary sensor samples and control variables. EEPROM can preserve configuration or calibration values. A system operating near the upper industrial temperature indication of 125 degrees Celsius should still verify the complete electrical limits and enclosure-induced temperature rise.
おすすめ
Low-Power IoT Control Node
For a small IoT node, the ATTINY826-SF can handle local sensing, state updates, and a control loop before data is transmitted upstream. The 8 KB Flash capacity is suitable for constrained firmware, and 1 KB of SRAM allows working data to remain on-chip rather than requiring an external memory device. The documented 8 MHz low-power mode at a 2.7 V minimum supply provides a useful power-management path. Final energy performance depends on the selected sleep mode, peripheral activity, and the communication module, which should be evaluated as a complete system.
おすすめ
Appliance Control Module
The ATTINY826-SF is appropriate for appliance control boards that coordinate inputs, outputs, timing, and persistent settings. Its 20 MHz AVR core executes quickly enough for deterministic control logic, while the hardware multiplier supports efficient arithmetic in motor, timing, or signal-processing routines. The 1 KB SRAM accommodates control variables, and 128 bytes of EEPROM can hold calibration or configuration information. Designers should assign every I/O function from the exact pin-description table because peripheral multiplexing can differ among tinyAVR 2 family members.
おすすめ
Embedded Motor and Relay Interface
The ATTINY826-SF can act as the supervisory controller for a small motor, valve, or relay interface when the system does not require a large real-time processor. The 20 MHz clock provides ample headroom for debouncing, sequencing, fault handling, and status reporting, while the hardware multiplier accelerates common multiplication operations. Because external inductive loads introduce switching transients, the design should include suitable driver, protection, grounding, and decoupling components. Confirm the exact timer, PWM, and I/O assignments in the manufacturer documentation.
おすすめ
Precision Measurement Front End
The ATTINY826-SF can support a compact measurement front end that performs local offset correction, filtering, range conversion, and digital compensation. Its 1 KB SRAM is suitable for modest working sets, while EEPROM provides nonvolatile storage for calibration constants. The 20 MHz execution rate allows processing to occur close to the sensor rather than relying on a distant host controller. Measurement accuracy remains dependent on the analog front end, reference source, layout, and calibration method; the MCU does not determine the accuracy of the sensed quantity by itself.
おすすめ
LED Lighting Controller
The ATTINY826-SF can manage a small LED-lighting or indicator system by coordinating dimming states, button inputs, fault flags, and operating schedules. Its 20 MHz core leaves processing margin for timing functions, and 128 bytes of EEPROM can retain a lighting profile or configuration identifier. The 8 KB Flash limit makes careful firmware organization important when multiple lighting patterns, diagnostics, and communication routines are required. Use the package pinout to verify PWM-capable outputs and confirm that external LED drivers are sized for the intended current rather than driving loads directly from the MCU.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ATTINY826-SF — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ATTINY827-SFR | ATTINY824-SFR | ATTINY426-SFR | ATTINY427-SFR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-20 | SOIC-20 - same package | SOIC-20 - same package | SOIC-20 - same package | SOIC-20 - same package |
| CPU Architecture | 8-bit AVR RISC with hardware multiplier | 8-bit AVR RISC with hardware multiplier | 8-bit AVR RISC with hardware multiplier | 8-bit AVR RISC with hardware multiplier | 8-bit AVR RISC with hardware multiplier |
| Maximum CPU Frequency | 20 MHz | Up to 20 MHz | Up to 20 MHz | Up to 20 MHz | Up to 20 MHz |
| Flash Program Memory | 8 KB | 8 KB | 4 KB (-50%) | 4 KB (-50%) | 4 KB (-50%) |
| SRAM | 1 KB | 1 KB | 512 B (-50%) | 512 B (-50%) | 512 B (-50%) |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
主な差別化要因
- Larger SRAM allocation within the same SOIC-20 footprint （vs ATTINY824-SFR)
- Double the Flash capacity for constrained embedded firmware （vs ATTINY426-SFR)
- Larger memory than ATTINY427-SFR without changing package footprint （vs ATTINY427-SFR)
- Closest high-proximity family alternative （vs ATTINY827-SFR)
設計ノート
Route the SOIC-20 footprint from the package drawing in the Microchip ATtiny826 documentation, and place the required bypass capacitor close to the device power pins. Keep programming and debug access reachable without forcing long traces through analog or high-current switching areas. Because the alternative list uses the same 20-pin SOIC family, the land pattern may be reusable, but each alternative's pin multiplexing must be checked before a board is respun.
Design the supply for the ATTINY826-SF's 2.7 V minimum operating voltage and verify the complete frequency-versus-voltage limits in the manufacturer electrical-characteristics table. The documented 8 MHz low-power mode can reduce switching demand, but average current also depends on sleep mode, timer activity, communication duty cycle, and I/O loading. Measure the assembled system's peak and sleep currents rather than estimating them from the maximum clock frequency alone.
Do not treat same-package family members as identical merely because they use the SOIC-20 footprint. ATTINY824-SFR, ATTINY426-SFR, and ATTINY427-SFR each have 4 KB of Flash and 512 B of SRAM, which is 50% less Flash and 50% less SRAM than ATTINY826-SF. Recheck bootloader size, stack usage, interrupt vectors, pin functions, and any firmware relying on extra peripherals before approving a substitution.
Use EEPROM writes only for values that genuinely need nonvolatile retention, since write endurance and timing can affect control-loop performance. Apply the manufacturer guidance for wear leveling or wear-reduction techniques where appropriate. Keep writes away from time-critical actuator sequences, and validate brownout, watchdog, and reset behavior in the final power-supply layout because transient control failures can be more consequential than a marginal code-size margin.
コンプライアンス情報
The product listing identifies ATTINY826-SF as Green and indicates industrial-temperature operation up to 125 degrees Celsius. Specific RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations are not stated for this exact ordering code.