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Microchip Technology ATTINY826-SF
- Part No.:
- ATTINY826-SF
- Manufacturer:
- Microchip Technology
- Category:
- Microcontrollers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ATTINY826-SF.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:475
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Product details
Overview
ATTINY826-SF from Microchip Technology is a 20-pin, 8 KB Flash, 1 KB SRAM, 128B EEPROM AVR®-based microcontroller operating at up to 20 MHz with 18 general-purpose I/O pins, 12-bit differential ADC with PGA, and dual USART/SPI/TWI peripherals - deployed in industrial sensor nodes and low-power control systems.
For engineers reviewing the ATTINY826-SF datasheet, ATTINY826-SF pinout, ATTINY826-SF application, or ATTINY826-SF equivalent, key selection criteria include its 20-pin SOIC/SSOP/VQFN package compatibility, UPDI single-wire programming interface, 1.8–5.5 V supply range, and support for RTC, Event System, and Configurable Custom Logic (CCL) in resource-constrained embedded designs.
Technical Context
The ATTINY826-SF implements the AVR CPU with hardware multiplier and two-level vectored interrupt controller, enabling deterministic real-time response. It integrates a 12-bit differential ADC (375 ksps) with programmable gain amplifier and selectable internal voltage references (1.024V, 2.048V, 2.5V, 4.096V, VDD).
Its peripheral architecture includes one 16-bit Timer/Counter Type A (TCA), two 16-bit Timer/Counter Type B (TCB), one Real-Time Counter (RTC), and an Event System with six channels for CPU-independent inter-peripheral signaling - all coordinated via a unified UPDI debug interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Memory | 8 KB - sufficient for complex firmware with bootloader, communication stacks, and sensor fusion logic |
| SRAM | 1 KB - supports multiple concurrent peripheral buffers and real-time task stacks |
| Max Clock Frequency | 20 MHz @ 4.5–5.5 V - enables high-speed serial communication and fast ADC sampling |
| I/O Pins | 18 programmable - allows direct connection to sensors, LEDs, buttons, and external peripherals without GPIO expansion |
| ADC Resolution & Speed | 12-bit differential, 375 ksps - delivers precision analog sensing with noise rejection for industrial transducers |
| Supply Voltage Range | 1.8 V to 5.5 V - supports battery-powered operation down to single-cell LiFePO₄ or alkaline, and rail-to-rail interfacing |
| Operating Temperature | -40°C to +85°C - qualified for industrial ambient environments without derating |
| Programming Interface | Single-pin UPDI - eliminates need for dedicated debug headers, simplifying PCB layout and reducing BOM count |
Pinout & Package
ATTINY826-SF is available in 20-pin SOIC (300 mil), SSOP (208 mil), and VQFN 3×3 mm packages. The -SF suffix denotes SOIC300 packaging per Microchip's device designation scheme (S = SOIC300, F = -40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power Supply | Main digital supply input (1.8–5.5 V); decoupling required near pin for stable core/peripheral operation |
| GND | Ground Reference | Digital ground return; must be connected to system ground plane with low-impedance path |
| UPDI | Unified Program & Debug Interface | Single-wire bidirectional interface for programming, debugging, and fuse configuration using high-voltage pulse |
| PA0–PA7 | Port A I/O | 8-bit general-purpose port with alternate functions including ADC inputs, USART0/1, TCA0, TCB0/1, and RTC clock source |
| PB0–PB5 | Port B I/O | 6-bit general-purpose port supporting ADC inputs, TWI, SPI, CCL, and external interrupts; PB0–PB1 also serve as crystal oscillator pins |
| RESET | Active-Low Reset Input | External reset trigger; internally pulled up; compatible with open-drain reset supervisors and push-button circuits |
Key Features
| Feature | Design Value |
|---|---|
| Event System with 6 Channels | Enables autonomous peripheral triggering (e.g., ADC conversion start on timer overflow) without CPU intervention, reducing latency and power |
| Configurable Custom Logic (CCL) | Four LUTs allow hardware implementation of glue logic (e.g., PWM edge detection, signal synchronization) without firmware overhead |
| Dual USART with Fractional Baud Rate | Supports precise asynchronous communication across wide baud ranges (e.g., 9600–1 Mbps) on two independent serial interfaces |
| Real-Time Counter (RTC) | Accurate timekeeping from internal 32.768 kHz ULP oscillator or external crystal - essential for sleep/wake scheduling and timestamping |
| 12-Bit Differential ADC with PGA | Programmable gain (1x–16x) and differential input mode reject common-mode noise in noisy industrial environments |
| Three Sleep Modes (Idle/Standby/Power-Down) | Power-Down mode draws ≤100 nA at 1.8 V - extends battery life in intermittently active sensor applications |
Applications
| Industrial Sensor Node | Smart Home Actuator Control |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity node with RS-485 backhaul and local LED status feedback. IC Role / Device Role / Timing Role: Main controller managing ADC acquisition, data preprocessing, UART-to-RS485 translation, and low-power sleep scheduling. Use Value: 18 GPIOs directly drive LEDs and interface with RS-485 transceiver; UPDI simplifies field firmware updates; RTC enables accurate wake intervals. |
Use Scenario: Zigbee/Z-Wave relay module controlling AC loads with overcurrent detection and thermal monitoring. IC Role / Device Role / Timing Role: System supervisor coordinating zero-crossing detection, current-sense ADC, relay timing, and wireless co-processor handshaking. Use Value: Dual USART handles both wireless module UART and local debug interface; CCL implements hardware-based zero-crossing edge detection. |
| Portable Medical Monitor | Automated Test Equipment (ATE) Front-End |
|
Use Scenario: Handheld pulse oximeter with analog front-end, OLED display, and USB-C charging interface. IC Role / Device Role / Timing Role: Signal processor acquiring photodiode signals via differential ADC, applying PGA gain, and driving display via SPI. Use Value: 12-bit differential ADC with PGA rejects motion artifact noise; 1.8 V operation enables direct LDO output from USB-C PD negotiation. |
Use Scenario: Modular test fixture measuring voltage/current on DUTs with isolated digital I/O and calibrated reference switching. IC Role / Device Role / Timing Role: Precision measurement coordinator managing multiplexed ADC inputs, reference selection, and isolation gate control. Use Value: Internal 2.5 V reference ensures consistent ADC scaling; Event System synchronizes ADC sampling with relay closure timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATTINY826-SS | Same core specs but in 20-pin SSOP (208 mil) package - 0.65 mm pitch vs SOIC's 1.27 mm; no thermal pad | Better suited for high-density PCBs where footprint area is constrained; less suitable for manual soldering or prototyping | Select ATTINY826-SS when board space is critical and automated assembly is used. |
| ATTINY826-MFR | Identical electrical specs but in VQFN 3×3 mm with exposed thermal pad; requires reflow profile optimization | Superior thermal performance and smaller footprint - ideal for compact, thermally demanding applications like motor drivers | Choose ATTINY826-MFR when thermal dissipation >150 mW is expected or board area is <25 mm². |
Compared with ATTINY826-SS and ATTINY826-MFR, the ATTINY826-SF offers the widest manufacturing compatibility (SOIC hand-solderable, wave-solder ready, and widely supported by test fixtures), making it optimal for low-volume industrial prototypes and medium-run production where assembly flexibility matters.
Availability
ATTINY826-SF is available at Aetrix Electronics and suitable for industrial sensor nodes, smart home actuator control, portable medical monitors, and automated test equipment front-ends requiring stable component supply and long-term lifecycle assurance.
Supply support for ATTINY826-SF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and Flash-IP solutions, serving industrial, automotive, and consumer markets with vertically integrated silicon and development tools.
The ATTINY826-SF belongs to the tinyAVR® 2 family - designed for cost-sensitive, low-power embedded applications requiring robust analog integration, flexible peripherals, and simplified programming/debugging via UPDI.
FAQ
What is the maximum operating frequency of the ATTINY826-SF?
The ATTINY826-SF operates at up to 20 MHz when supplied with 4.5–5.5 V. At lower voltages, its maximum frequency is reduced: 10 MHz at 2.7–5.5 V and 5 MHz at 1.8–5.5 V. These speed grades are guaranteed across the full -40°C to +85°C temperature range, ensuring reliable timing in industrial environments. The ATTINY826-SF uses an internal 20 MHz oscillator that is factory-calibrated and lockable.
Does the ATTINY826-SF support in-system programming?
Yes, the ATTINY826-SF supports in-system programming via its single-pin UPDI interface, which uses a high-voltage pulse (12 V) on the UPDI pin to enter programming mode. This eliminates the need for dedicated ISP headers or separate debug adapters. Firmware updates, fuse configuration, and memory verification can all be performed while the ATTINY826-SF remains soldered on the target board.
What analog features does the ATTINY826-SF include?
The ATTINY826-SF integrates a 12-bit differential ADC with Programmable Gain Amplifier (PGA), supporting up to 15 input channels and 375 ksps sampling rate. It also provides four selectable internal voltage references (1.024V, 2.048V, 2.500V, 4.096V) plus VDD, enabling precise ratiometric measurements. An Analog Comparator with scalable reference input is also included for threshold detection without CPU load.
Is the ATTINY826-SF pin-compatible with other tinyAVR® 2 devices?
Yes - the ATTINY826-SF is fully pin- and feature-compatible with other 20-pin tinyAVR® 2 family members, including ATTINY426-SF and ATTINY1626-SF. This vertical migration path allows memory upgrades (e.g., from 4 KB to 8 KB Flash) without PCB redesign or firmware changes, provided peripheral usage stays within the shared pin multiplexing map defined in the datasheet.
What sleep modes does the ATTINY826-SF support, and what is the lowest power consumption?
The ATTINY826-SF supports three sleep modes: Idle (peripherals active, CPU halted), Standby (select peripherals configurable), and Power-Down (full data retention). In Power-Down mode at 1.8 V and 25°C, typical current consumption is ≤100 nA - enabling multi-year battery life in intermittent-sensing applications. Wake-up sources include UPDI, RESET, PORT interrupts, and RTC events.
ATTINY826-SF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Series:
- tinyAVR® 2
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- AVR
- Core Size:
- 8-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 18
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 128 x 8
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 15x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ATTINY826-SF FAQ
1.How can I place an order for ATTINY826-SF through Aetrix?
Please submit a Request for Quotation (RFQ) for ATTINY826-SF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ATTINY826-SF reliable?
The price and inventory of ATTINY826-SF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATTINY826-SF is usually 5 days.
3.What payment methods are accepted for ATTINY826-SF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATTINY826-SF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATTINY826-SF?
ATTINY826-SF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATTINY826-SF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ATTINY826-SF?
For technical support, including ATTINY826-SF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATTINY826-SF requirements.
6.How does Aetrix verify that ATTINY826-SF is sourced from the original manufacturer or authorized distributors?
All ATTINY826-SF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ATTINY826-SF meets industry standards.
7.What is the process for return or replacement of ATTINY826-SF?
All ATTINY826-SF units undergo pre-shipment inspection (PSI). If there is an issue with ATTINY826-SF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ATTINY826-SF part is unused and in its original packaging.
Return procedure for ATTINY826-SF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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