ATTINY826-SU - 20MHz 8KB AVR MCU | Microchip Technology
MPN: ATTINY826-SU ✓ ActiveATTINY826-SU Overview
An 8-bit microcontroller is a programmable semiconductor containing a processor core, memory, and integrated peripherals on one device. Within the product hierarchy, the ATTINY826 belongs to the AVR family, the tinyAVR 2 series, and the broader embedded-microcontroller category. Unlike a discrete logic controller, it executes firmware that can implement timers, communication protocols, control sequences, and interface handling without requiring extensive external components.
The ATTINY826 uses an AVR CPU with a hardware multiplier and can run at up to 20 MHz. Its 8 KB Flash capacity provides room for application code, while 1 KB of SRAM supports working variables and stack operations. Nonvolatile EEPROM preserves up to 128 bytes of calibration data, configuration values, or counters when the main supply is removed. The listed operating voltage options are 2.5 V, 3.3 V, and 5 V, supporting both low-voltage and conventional embedded-system rails.
The -SU ordering code identifies a 20-pin SOIC package rated for industrial temperature operation to 85 °C. This surface-mount package is suitable for automated assembly and compact PCB layouts. The tinyAVR 2 family uses modern low-power design techniques and an Event System, allowing peripherals to communicate through events to reduce CPU intervention. Exact peripheral assignments, clock configurations, and current-consumption figures must be confirmed in the manufacturer datasheet.
Typical uses for the ATTINY826-SU include compact industrial controllers, sensor-interface modules, low-power monitoring equipment, actuator-control boards, and small consumer devices. Its combination of 20 MHz processing, 8 KB Flash, and 1 KB SRAM makes it practical for modest control tasks that do not require a high pin count or large application memory.
Designers should verify the exact pin multiplex, peripheral allocation, clock limits, and decoupling requirements against the manufacturer datasheet. A 20 MHz operating point requires suitable clock configuration and signal integrity, while production layouts should provide short return paths and stable supply filtering around the device.
This page consolidates verified manufacturer and distributor information, pin-compatible family alternatives, pricing references, and practical selection guidance. It is intended to help engineers determine whether the ATTINY826-SU fits a specific embedded-control design before completing PCB and firmware validation.
Drop-in alternatives for ATTINY826-SU — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
ATTINY826-SUR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATTINY824-SU
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATTINY824-SUR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATTINY827-SU
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATTINY826-SU Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit AVR tinyAVR 2 microcontroller |
| Maximum CPU Frequency | 20 MHz |
| Flash Memory | 8 KB |
| SRAM | 1 KB |
| EEPROM | 128 bytes |
| CPU Architecture | AVR with hardware multiplier |
| Instruction Width | 8-bit |
| Operating Voltage Options | 2.5 V, 3.3 V, or 5 V |
| Package | 20-pin SOIC |
| Pin Count | 20 pins |
| Mounting Type | Surface mount |
| Industrial Temperature Rating | Up to 85 °C |
| Product Family | tinyAVR 2 |
| Peripheral Architecture | Event System |
ATTINY826-SU 20-pin soic Pin Configuration Guide
Pin configuration for ATTINY826-SU (20-pin soic 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 ATTINY826-SU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATTINY826-SU is suitable for 6 applications: Compact Industrial Control Module, Low-Power Sensor Interface, Actuator and Motor Control, Battery-Powered Monitoring Device, LED Status and Lighting Controller, Small Consumer Accessory Controller.
Compact Industrial Control Module
The ATTINY826-SU fits compact industrial control modules that coordinate digital inputs, outputs, timers, and local supervisory logic. Its 20 MHz AVR core provides more than enough execution speed for many sequencing and state-machine tasks, while 8 KB of Flash accommodates application firmware and 1 KB of SRAM supports runtime variables. The 20-pin SOIC package supports dense, automated PCB assembly. Because the listed industrial rating reaches 85 °C, the part can be considered for ordinary industrial environments after checking the full temperature and electrical limits in the manufacturer datasheet.
Recommended
Low-Power Sensor Interface
The ATTINY826-SU is appropriate for a low-power sensor interface that converts digital sensor events into measurements, alarms, or stored readings. Its 8-bit architecture and 20 MHz clock are suitable for polling and filtering moderate data streams, while the 128-byte EEPROM can retain calibration constants or a sequence counter. The tinyAVR 2 family's low-power design supports battery-oriented concepts, although actual sleep current, active current, and wake-up timing must be verified before calculating operating life.
Recommended
Actuator and Motor Control
The ATTINY826-SU can serve as the supervisory controller in a small actuator or motor-control module. Its fast AVR core can execute timing sequences, monitor limit inputs, and coordinate relays or driver-enable signals, while the 20-pin SOIC footprint leaves a defined number of I/O pins for the surrounding power stage. For motor or solenoid systems, external transistors, flyback protection, and current sensing remain necessary; the microcontroller should not directly carry inductive load current.
Recommended
Battery-Powered Monitoring Device
The ATTINY826-SU is suitable for a battery-powered monitoring device that performs periodic measurement, threshold evaluation, and event logging. Its 8 KB Flash stores compact firmware, 1 KB of SRAM handles working state, and 128 bytes of EEPROM preserves small configuration records between power cycles. The tinyAVR 2 family's low-power architecture makes it a reasonable starting point for duty-cycled designs, but battery-life estimates require verified active and sleep-current figures plus a defined duty cycle from the manufacturer datasheet.
Recommended
LED Status and Lighting Controller
The ATTINY826-SU can implement LED status indication, sequencing, or simple lighting-control functions in a compact product. Its 20 MHz speed provides deterministic timing for multichannel patterns, and 8 KB of Flash is sufficient for moderate animation and state-machine logic. The available I/O count and whether a device such as the ATTINY826-SU includes the required PWM or LED-specific peripherals must be confirmed from the exact pinout and datasheet before assigning channels or selecting external driver circuits.
Recommended
Small Consumer Accessory Controller
The ATTINY826-SU works well in a small consumer accessory that needs local logic, persistent settings, and several digital interfaces. It can manage button inputs, status LEDs, and a serial link while operating from a 2.5 V, 3.3 V, or 5 V rail as supported by the selected configuration. The 8-bit architecture minimizes system complexity relative to a larger MCU, and the 20-pin SOIC package is convenient for automated production. Final qualification should include brownout behavior, supply noise, and accessory-cable compatibility.
Recommended
Recommended Products Summary
Engineering reference data for ATTINY826-SU — comparison, design guidance, and compliance information.
Selection Guide
ATTINY826-SUR is the closest manufacturing alternative when reel packaging is preferred, because its key electrical ratings align. ATTINY824-SU and ATTINY824-SUR may fit only after confirming that 4 KB Flash and 512 bytes of SRAM are sufficient; each provides 50% less Flash and 100% less SRAM than the target. ATTINY827-SU should be considered only after its exact memory, peripheral, and pin mapping have been compared. No verified cross-brand drop-in replacement was found, so firmware and hardware validation remain essential for every substitution.
Comparison with Alternatives
| Parameter | This Product | ATTINY826-SUR | ATTINY824-SU | ATTINY824-SUR | ATTINY827-SU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SOIC | 20-pin SOIC - same | 20-pin SOIC - same | 20-pin SOIC - same | 20-pin SOIC - same |
| Product Type | 8-bit AVR tinyAVR 2 microcontroller | 8-bit AVR tinyAVR 2 microcontroller | 8-bit AVR tinyAVR 2 microcontroller | 8-bit AVR tinyAVR 2 microcontroller | 8-bit AVR tinyAVR 2 microcontroller |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
Key Differentiators
- Larger program memory than the 4 KB-class ATTINY824 alternatives (vs ATTINY824-SU)
- Twice the working memory of the 4 KB-class ATTINY824 alternatives (vs ATTINY824-SUR)
- Closest ordering alternative preserves the core memory configuration (vs ATTINY826-SUR)
- More code capacity than the ATTINY827-SU alternative in the verified comparison (vs ATTINY827-SU)
Design Notes
Design the supply network for the exact voltage and frequency combination listed in the manufacturer datasheet rather than assuming that every listed operating voltage supports 20 MHz. Place the required local bypass capacitors close to the supply and ground pins, keep the return path short, and verify startup, brownout, and power-save behavior in hardware. The verified device supports 2.5 V, 3.3 V, and 5 V options, but precise voltage limits and current figures were not included in the supplied search data.
Route the 20-pin SOIC footprint with adequate clearance for assembly and rework, and confirm every pin function against the exact ATTINY826-SU package drawing. The supplied snippets identify the package and pin count but do not reproduce a complete pin table, so automated PCB generation must not infer functions from another tinyAVR member. Provide a clean ground plane, short supply connections, and controlled return paths for oscillator and high-speed switching signals.
Do not substitute ATTINY824-SU or ATTINY827-SU solely because they use the same 20-pin SOIC outline. The 824 family members provide 4 KB Flash instead of the target's 8 KB, a 50% reduction that can cause firmware overflow, while the 827 may assign resources differently. Review the linked-pin table, memory map, timer channels, serial peripherals, oscillator options, fuse defaults, and package drawing before approving any alternative.
Apply the datasheet's clock recommendations even when the design does not use the maximum 20 MHz rate. Keep oscillator traces short, avoid routing high-current load-switch nodes beneath the MCU, and isolate noisy switching regulators and relays from sensitive timing paths. Because the product uses an AVR core that may operate from an internal or external clock source, the final layout and startup behavior should be validated with the exact fuse configuration.
Compliance Information
The supplied verified search results identify an industrial 85 °C-rated green SOIC20 device, but they do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance values are therefore recorded as unknown rather than inferred.