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Microchip Technology ATTINY1626-SUR
- Part No.:
- ATTINY1626-SUR
- Manufacturer:
- Microchip Technology
- Category:
- Microcontrollers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ATTINY1626-SUR.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,481
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Product details
Overview
ATTINY1626-SUR from Microchip Technology is a 20-pin, 16 KB Flash, 2 KB SRAM, 256B EEPROM AVR®-based microcontroller running at up to 20 MHz with a 12-bit differential ADC (375 ksps), PGA, and dual USART/SPI/TWI interfaces. It serves as a low-power embedded controller in sensor nodes, industrial monitoring, and smart peripherals requiring precise analog acquisition and event-driven peripheral coordination.
For engineers reviewing the ATTINY1626-SUR datasheet, ATTINY1626-SUR pinout, ATTINY1626-SUR application, or ATTINY1626-SUR equivalent, this page delivers verified package mapping (20-pin SOIC/SSOP/VQFN), validated pin functions, real-world use cases, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The ATTINY1626-SUR implements the tinyAVR® 2 architecture with a hardware multiplier, two-level vectored interrupt controller, and CPU-independent Event System enabling deterministic inter-peripheral signaling without CPU intervention. Its unified UPDI interface uses a single pin for programming and debugging via high-voltage pulse or fuse override.
It integrates a 12-bit differential ADC with programmable gain amplifier (PGA) supporting up to 15 input channels, selectable internal voltage references (1.024V–4.096V), and automated CRC flash memory scanning. The RTC runs from either an internal 32.768 kHz ULP oscillator or external crystal, with crystal error correction capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | AVR® CPU with hardware multiplier, 20 MHz max operation |
| Memory | 16 KB Flash (10,000 write/erase cycles), 2 KB SRAM, 256B EEPROM (100,000 cycles) |
| ADC | 12-bit differential, 375 ksps, 15-channel input with PGA and 5 internal VREF options |
| Timers | 1× TCA (3 PWM channels), 2× TCB (input capture + PWM), 1× RTC (32.768 kHz source) |
| Communication | 2× USART (fractional baud, auto-baud), 1× SPI, 1× TWI (Sm/Fm/Fm+ modes) |
| Power & Sleep | 1.8–5.5 V supply; Idle/Standby/Power-Down modes with full data retention |
| Debug | Single-pin UPDI interface with high-voltage programming and fuse override support |
Pinout & Package
ATTINY1626-SUR is available in 20-pin packages: SOIC (300 mil), SSOP (208 mil), and VQFN 3×3 mm. Pin functions are shared across all 20-pin variants per I/O multiplexing configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Supply voltage | Main power input (1.8–5.5 V); decoupling required near pin |
| GND | Ground reference | Digital and analog ground return path; separate AGND not implemented |
| PA0–PA7 | Port A I/O | 8-bit bidirectional port with configurable pull-up, interrupt, and peripheral multiplexing (ADC, USART, TCA) |
| PB0–PB5 | Port B I/O | 6-bit bidirectional port supporting TCB, TWI, UPDI, and external interrupts |
| UPDI | Unified Program & Debug Interface | Single-wire debug and programming; requires 12 V pulse for activation or fuse-configured override |
| RESET | Active-low reset input | External reset trigger; also used for high-voltage programming entry when UPDI disabled |
| XOSC32K1/XOSC32K2 | 32.768 kHz crystal terminals | Connects external crystal for RTC accuracy; internal load caps enabled by fuse |
Key Features
| Feature | Design Value |
|---|---|
| Event System | 6-channel CPU-independent peripheral event routing reduces ISR latency and enables deterministic timing-critical responses |
| Configurable Custom Logic (CCL) | 4 LUTs allow hardware-level logic synthesis (e.g., edge detection, pulse stretching) without CPU overhead |
| Programmable Gain Amplifier (PGA) | Integrated PGA before ADC enables direct measurement of µV-level sensor signals (e.g., thermocouples, strain gauges) |
| Real-Time Counter (RTC) | Hardware RTC with crystal error correction maintains ±2 ppm accuracy over temperature and aging |
| Automated CRC Flash Scan | On-demand or periodic flash integrity check detects bit corruption without software intervention or CPU cycle consumption |
Applications
| Industrial Sensor Node | Smart Home Thermostat |
|---|---|
Use Scenario: Battery-powered temperature/humidity node with local logging and wireless wake-on-event transmission. IC Role / Device Role / Timing Role: Main system controller managing ADC sampling, RTC-triggered sleep/wake cycles, and UART-to-RF bridge logic. Use Value: Low-power sleep modes (Power-Down with full SRAM retention) extend battery life >5 years; PGA enables direct thermistor signal conditioning without external op-amps. | Use Scenario: Wall-mounted HVAC controller with touch interface, ambient sensing, and display backlight control. IC Role / Device Role / Timing Role: Central MCU coordinating I²C sensor reads, PWM fan speed control, and real-time clock-based scheduling. Use Value: Dual USART supports simultaneous communication with display module and RF transceiver; CCL offloads button debouncing and LED dimming logic from firmware. |
| Programmable Logic Controller (PLC) I/O Module | Medical Wearable Sensor Hub |
Use Scenario: DIN-rail mounted digital I/O expansion module with isolated inputs and relay outputs. IC Role / Device Role / Timing Role: Isolation interface controller handling opto-input sampling, watchdog supervision, and Modbus RTU over RS-485. Use Value: Two USARTs enable dedicated Modbus master/slave ports; Event System synchronizes input sampling with output update without CPU polling. | Use Scenario: ECG/PPG patch collecting analog biosignals, performing on-device filtering, and transmitting processed data via BLE. IC Role / Device Role / Timing Role: Analog front-end coordinator acquiring differential biopotentials, applying PGA gain, and triggering DMA transfers to BLE subsystem. Use Value: 12-bit differential ADC with PGA achieves >80 dB SNR for microvolt-level ECG signals; internal 2.048 V reference ensures stable scaling across battery voltage range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATTINY1624-SFR | 14-pin SOIC/TSSOP; 12 I/O pins; same core, memory, and peripherals except reduced PORTB (no PB5) and no XOSC32K2 pin | Limited to space-constrained designs needing ≤12 I/O and no external 32.768 kHz crystal support | Select when board layout requires smaller footprint and RTC crystal is unnecessary |
| ATTINY1627-MUR | 24-pin VQFN; 22 I/O pins; adds PORTC and XOSC32K2; identical core/peripherals/memory | Suitable for designs requiring ≥18 I/O, additional analog inputs, or dual-crystal RTC configuration | Select when migrating upward with vertical pin compatibility and need for expanded I/O or crystal redundancy |
Compared with ATTINY1626-SUR, ATTINY1624-SFR offers reduced I/O count and no 32.768 kHz crystal support-ideal for compact sensor endpoints-while ATTINY1627-MUR provides 4 extra I/O pins and full crystal terminal access, enabling higher channel-count analog systems without firmware changes.
Availability
ATTINY1626-SUR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart home thermostats, and PLC I/O modules requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability options.
Supply support for ATTINY1626-SUR 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, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The ATTINY1626-SUR belongs to the tinyAVR® 2 family-designed specifically for cost-sensitive, low-power embedded applications demanding integrated analog precision, deterministic event handling, and minimal external component count.
FAQ
What is the maximum operating frequency of the ATTINY1626-SUR and under what voltage conditions?
The ATTINY1626-SUR operates at up to 20 MHz when supplied between 4.5 V and 5.5 V. At 2.7–5.5 V, it supports up to 10 MHz, and at 1.8–5.5 V, up to 5 MHz. These speed grades are defined across the -40°C to +85°C temperature range and are enforced by internal clock prescalers and BOD settings. The ATTINY1626-SUR does not support 20 MHz operation below 4.5 V.
Does the ATTINY1626-SUR support external 32.768 kHz crystal for RTC operation?
Yes, the ATTINY1626-SUR supports external 32.768 kHz crystal connection via XOSC32K1 and XOSC32K2 pins. The internal load capacitors can be enabled via fuse settings, eliminating need for external caps in many designs. Crystal error correction is implemented in hardware to maintain RTC accuracy over temperature and aging. This functionality is fully operational in the ATTINY1626-SUR.
How many ADC input channels does the ATTINY1626-SUR support, and what is its effective resolution?
The ATTINY1626-SUR supports up to 15 single-ended or differential ADC input channels using its 12-bit successive approximation register (SAR) converter. With PGA gain and oversampling, effective resolution reaches 14 bits at lower sampling rates. The ADC achieves 375 ksps maximum throughput and supports differential measurements with programmable gain (1x–16x), directly usable with sensors like thermocouples or bridge transducers.
Is the ATTINY1626-SUR pin-compatible with other tinyAVR® 2 family members?
Within the 20-pin variants, the ATTINY1626-SUR is pin-compatible with ATTINY1626-MUR and ATTINY1626-SSUR across SOIC, SSOP, and VQFN packages. However, it is not pin-compatible with 14-pin (ATTINY1624) or 24-pin (ATTINY1627) variants due to differing pin counts and I/O mappings. Vertical migration between ATTINY1624/1626/1627 requires PCB redesign.
What debug interface does the ATTINY1626-SUR use, and how is it activated?
The ATTINY1626-SUR uses the Unified Program and Debug Interface (UPDI), a single-wire interface shared with the RESET pin. Activation requires either a 12 V pulse on UPDI/RESET or fuse configuration to enable low-voltage UPDI mode. Standard debug tools (e.g., MPLAB PICkit™ 4, Atmel-ICE) support UPDI natively. No external debugger header is needed-the ATTINY1626-SUR supports in-system programming and real-time debugging through this single pin.
ATTINY1626-SUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Series:
- tinyAVR® 2
- Packaging:
- Tape & Reel (TR)
- 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:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 256 x 8
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 15x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ATTINY1626-SUR FAQ
1.How can I place an order for ATTINY1626-SUR through Aetrix?
Please submit a Request for Quotation (RFQ) for ATTINY1626-SUR 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 ATTINY1626-SUR reliable?
The price and inventory of ATTINY1626-SUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATTINY1626-SUR is usually 5 days.
3.What payment methods are accepted for ATTINY1626-SUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATTINY1626-SUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATTINY1626-SUR?
ATTINY1626-SUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATTINY1626-SUR 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 ATTINY1626-SUR?
For technical support, including ATTINY1626-SUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATTINY1626-SUR requirements.
6.How does Aetrix verify that ATTINY1626-SUR is sourced from the original manufacturer or authorized distributors?
All ATTINY1626-SUR 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 ATTINY1626-SUR meets industry standards.
7.What is the process for return or replacement of ATTINY1626-SUR?
All ATTINY1626-SUR units undergo pre-shipment inspection (PSI). If there is an issue with ATTINY1626-SUR, 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 ATTINY1626-SUR part is unused and in its original packaging.
Return procedure for ATTINY1626-SUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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