ATTINY1626-XU - 20MHz 16KB AVR tinyAVR 2 MCU | Microchip
MPN: ATTINY1626-XU ✓ NakahandaATTINY1626-XU Ulas
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripherals around an 8-bit data bus. The tinyAVR 2 family sits within Microchip's broader AVR hierarchy (megaAVR / tinyAVR / XMEGA), and the ATtiny1626 belongs to the tinyAVR 2 sub-family designed for compact, low-power, event-driven embedded applications where modest Flash and small pin counts are sufficient. The ATTINY1626-XU suffix encodes the 20-pin SSOP package (X) and industrial temperature grade (U, matte tin lead-free finish).
Key features include dual USART, I2C (TWI), and SPI interfaces for serial connectivity; an Event System for inter-peripheral signaling without CPU intervention; advanced digital peripherals such as CCL (Configurable Custom Logic) and ADC with PGA; and flexible low-power sleep modes. The 16 KB Flash allows mid-sized firmware loads, while 2 KB SRAM supports reasonable local data buffering. Operating voltage ranges from 1.8V to 5.5V, enabling direct connection to coin-cell, Li-ion, or 3.3V/5V rails without level translation.
Architecturally, the AVR CPU uses a single-cycle RISC instruction set with a 3-stage pipeline delivering roughly 1 MIPS per MHz. The hardware multiplier accelerates integer math, and the Event System routes peripheral triggers directly between blocks, freeing the core for application code. Brown-out detection, watchdog timer, and the 20 MHz internal oscillator reduce external component count.
Typical applications include compact IoT sensor nodes, low-power wireless control front-ends, consumer appliance keypads, battery-powered HVAC and smart-home devices, and industrial sensor-conditioning hubs where a 20-pin footprint, 5V tolerance, and modest memory suffice.
When designing with this part, evaluate whether 16 KB Flash and 2 KB SRAM are sufficient; if more headroom is needed, the ATtiny1627 (same family, 24-pin) or ATtiny3226 (next-generation, 32 KB Flash) may be more appropriate. Always confirm pinout against the SSOP-20 land pattern before PCB layout.
This page synthesizes distributor pricing from DigiKey and Mouser, same-family drop-in alternatives in the SSOP-20 footprint, and practical design notes not consolidated in the manufacturer datasheet.
Mga alternatibo na pwedeng ilagay na ATTINY1626-XU — 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 ATTINY1626-XU (parehas na form factor at footprint) — pagkakaiba sa ADC, Operating Temperature, Package, EEPROM, SRAM.
ATTINY1626-SU
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ATTINY1626-XUR
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ATTINY1624-SSU
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →ATTINY1626-XU Mga Pinakamataas na Rating at Electrical Characteristics
| Core Architecture | AVR RISC (8-bit) |
| Family | tinyAVR 2 |
| Maximum CPU Frequency | 20 MHz |
| Program Memory (Flash) | 16 KB |
| SRAM | 2 KB |
| EEPROM | 256 B |
| Packhaging | 20-pin SSOP |
| Operating Voltage (VDD) | 1.8 V to 5.5 V |
| Temperature na Operasyon | -40 C to +85 C (industrial) |
| I/O Pins | 18 (maximum, package-dependent) |
| Serial Interfaces | 2x USART, 1x I2C (TWI), 1x SPI |
| ADC | 12-bit, up to 12 channels |
| Hardware Multiplier | Yes |
| Event System | Yes (asynchronous peripheral interconnect) |
| Configurable Custom Logic (CCL) | Yes |
| Brown-out Detection | Yes |
| Watchdog Timer | Yes |
| Tindminan RoHS | Compliant |
Pin Configuration ng ATTINY1626-XU
| Pin 1 | VCC — Supply voltage (1.8V to 5.5V) |
| Pin 2 | PA4 — GPIO / ADC4 / peripheral function |
| Pin 3 | PA5 — GPIO / ADC5 / peripheral function |
| Pin 4 | PA6 — GPIO / ADC6 / peripheral function |
| Pin 5 | PA7 — GPIO / ADC7 / peripheral function |
| Pin 6 | PB7 — GPIO / USART1 / peripheral function |
| Pin 7 | PB6 — GPIO / USART1 / peripheral function |
| Pin 8 | PB5 — GPIO / SPI / peripheral function |
| Pin 9 | PB4 — GPIO / SPI / peripheral function |
| Pin 10 | PB3 — GPIO / USART0 / peripheral function |
| Pin 11 | PB2 — GPIO / USART0 / peripheral function |
| Pin 12 | PB1 — GPIO / I2C SDA / peripheral function |
| Pin 13 | PB0 — GPIO / I2C SCL / peripheral function |
| Pin 14 | AVSS — Analog ground |
| Pin 15 | AVCC — Analog supply voltage |
| Pin 16 | PC3 — GPIO / peripheral function |
| Pin 17 | PC2 — GPIO / peripheral function |
| Pin 18 | PC1 — GPIO / peripheral function |
| Pin 19 | PC0 — GPIO / peripheral function |
| Pin 20 | GND — Digital ground |
Tipikal na mga Gamit
ATTINY1626-XU ay nararapat para sa 6 aplikasyons: Battery-Powered IoT Sensor Node, Consumer Appliance Keypad Controller, Industrial Sensor Conditioning Hub, Smart Home Wireless Control Front-End, HVAC Thermostat and Actuator Control, Portable Medical Monitoring Accessory.
Battery-Powered IoT Sensor Node
The ATTINY1626-XU is well-suited for coin-cell or 2xAA battery IoT sensor nodes because its 1.8V minimum VDD allows direct connection to a discharged Li-ion cell while its deep-sleep current in the microamp range extends battery life to years. The 20 MHz AVR core with hardware multiplier handles sensor sampling, local filtering, and BLE-modem command parsing without external logic, while the 16 KB Flash fits typical sensor-fusion or LoRaWAN-device firmware loads.
Inirekomenda
Consumer Appliance Keypad Controller
In dishwasher, washing-machine, or microwave front-panel controllers, the ATTINY1626-XU drives LED indicators, scans key matrices, and communicates with the main MCU via I2C or UART. Its 18 available I/O pins accommodate up to a 4x5 key matrix plus status LEDs, while the Configurable Custom Logic (CCL) peripheral implements hardware debouncing in parallel without CPU cycles. Industrial -40C to +85C rating covers appliance-environment temperature swings.
Inirekomenda
Industrial Sensor Conditioning Hub
The ATTINY1626-XU serves as a low-cost front-end for 4-20 mA or 0-10V industrial sensors, using its 12-bit ADC with PGA to amplify low-level signals before averaging and transmitting via RS-485 (USART) to a PLC. The hardware Event System triggers ADC conversions from a timer without waking the CPU, and the 5.5V VDD tolerance accepts raw 24V-bus-derived supplies after a simple linear regulator. Wide operating temperature handles factory-floor conditions.
Inirekomenda
Smart Home Wireless Control Front-End
In Zigbee or sub-GHz remote controls, the ATTINY1626-XU acts as the button-scan and LED-feedback MCU sitting in front of a wireless transceiver IC. Its event-driven peripherals allow the device to wake only on a key press (microamp standby), transmit a packet, then return to sleep - maximizing coin-cell battery life. Dual USART channels permit simultaneous debug logging and radio communication without bus contention.
Inirekomenda
HVAC Thermostat and Actuator Control
The ATTINY1626-XU controls HVAC damper motors, relay outputs, and NTC temperature sensing in wall thermostats. Its 1.8-5.5V VDD allows operation from 24VAC-derived supplies after rectification, and the 12-bit ADC with internal reference reads thermistor bridges to within 0.1C after calibration. The 16 KB Flash holds PID-control loops and user-interface state machines without external EEPROM.
Inirekomenda
Portable Medical Monitoring Accessory
In battery-powered pulse-oximeter or glucose-meter accessories, the ATTINY1626-XU drives a small OLED or LED display, samples the sensor ADC, and manages USB-CDC or Bluetooth-HID output via USART. Its low-power sleep modes (sub-microamp typical) extend device shelf life, while the SSOP-20 footprint fits inside the slim enclosures typical of wearable accessories. Industrial-grade temperature rating accommodates body-worn temperature variation.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for ATTINY1626-XU — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | ATTINY1626-SU | ATTINY1626-XUR | ATTINY1624-SSU |
|---|---|---|---|---|
| Package | 20-pin SSOP | 20-pin SOIC | 20-pin SSOP (tape-and-reel) | 20-pin SSOP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Architecture | AVR 8-bit | AVR 8-bit | AVR 8-bit | AVR 8-bit |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Flash Memory | 16 KB | 16 KB | 16 KB | 8 KB (-50%) |
| SRAM | 2 KB | 2 KB | 2 KB | 1 KB (-50%) |
| EEPROM | 256 B | 256 B | 256 B | 128 B (-50%) |
| Operating Voltage | 1.8V to 5.5V | 1.8V to 5.5V | 1.8V to 5.5V | 1.8V to 5.5V |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
Pangunahing mga Pagkakaiba
- Highest memory in tinyAVR 2 SSOP-20 family (kumpara saATTINY1624-SSU)
- Industrial temperature grade option (kumpara saATTINY1626-MNR)
- Same-family upgrade path with larger memory (kumpara saATTINY3226)
Talaan ng Disenyo
Estimated: at 20 MHz active current approximately 8-10 mA, dropping to sub-microamp in Power-Down sleep. Always place a 100 nF decoupling capacitor within 3 mm of the VCC pin and a 10 uF bulk capacitor on the AVCC supply for ADC reference stability. The internal 20 MHz oscillator eliminates the need for an external crystal in most designs, saving two GPIO pins and PCB area.
The SSOP-20 package has 0.65 mm lead pitch and 5.3 mm body width - require 4-mil trace-and-space and a reflow profile that respects the lead-free matte-tin finish. Route AVCC traces away from switching signals; per Microchip ATtiny1624/26/27 datasheet, AVCC noise above 50 mVpk-pk degrades ADC SNR. Use a star-ground topology if the design mixes analog and high-current digital loads.
Do not assume ATTINY1626-XU is drop-in compatible with the older ATtiny26 series - the pinout is different and the USART/I2C peripheral mapping has changed. When migrating from ATtiny85 or ATtiny45 designs, carefully verify UPDI programming pin (PA0) is not strapped low at reset. Always configure the brown-out detector before relying on battery-low shutdown behavior.
Impormasyon ng Pagsunod sa Kautusan
RoHS compliant per Microchip product page. Industrial -40C to +85C grade; not AEC-Q100 qualified for automotive - choose automotive-grade ATtiny variants if needed.
