ATTINY20-XU - 12MHz 8-Bit AVR MCU, 2KB Flash | Microchip
MPN: ATTINY20-XU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.4264 | $0.43 |
| 10 | $0.4264 | $4.26 |
| 100 | $0.4264 | $42.64 |
| 500 | $0.4264 | $213.20 |
| 1,000 | $0.4264 | $426.40 |
ATTINY20-XU Overview
What is an 8-bit AVR microcontroller? An AVR microcontroller is a programmable embedded controller that combines a processor core, nonvolatile program memory, data memory, and peripherals on one semiconductor device. The ATTINY20 belongs to the ATtiny family, a compact branch of 8-bit RISC microcontrollers used for control, sensing, communication, and low-power automation. Its reduced instruction set and integrated peripherals make it suitable for small standalone systems rather than high-compute workloads.
The ATTINY20-XU emphasizes compact embedded control with 2 KB of flash and 128 bytes of SRAM. According to the verified Microchip product information, the device uses a high-performance, low-power AVR 8-bit RISC architecture and supports up to 12 MIPS throughput through fully static operation. Its 10-bit ADC enables basic analog measurements, while dual PWM outputs support dimming, speed control, and other waveform-based functions.
The TSSOP-14 package keeps the device compatible with surface-mount PCB assembly while exposing the ATtiny20's I/O and power connections. Programming is supported through the device's in-system programming resources, subject to the programming connector, fuse settings, and timing requirements in the Microchip datasheet. The verified distributor listings identify ATTINY20-XU as an industrial-temperature 2.5 V, 3.3 V, and 5 V device.
Typical applications include compact sensor nodes, simple motor and actuator controllers, LED dimming, industrial control modules, and low-cost communication peripherals. For analog sensing, the ADC and 12 I/O lines reduce external component count; for motor or LED control, the two PWM channels provide a direct output path. Designers should verify ADC accuracy, timer limits, pin multiplexing, and supply-specific limits in the manufacturer datasheet.
For a new design, confirm the exact pinout, fuse configuration, programming interface, clock source, and package dimensions before layout. The XU ordering suffix identifies the verified TSSOP package option, but it does not by itself establish toolchain, lifecycle, or lead-time commitments. This page combines verified product information, sourcing context, application guidance, and replacement considerations beyond a basic distributor listing.
Drop-in alternatives for ATTINY20-XU — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATTINY20-XU (same form factor and footprint) — differing in Package, ADC, Maximum Clock Frequency, SRAM, Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATTINY20-XUR
✅ Drop-In📋 Reference alternative (not in catalog)
ATTINY20-XU
✅ Drop-In✓ In Stock
$0.4264 / Unit
View Datasheet →ATTINY40-XU
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →ATTINY204-SSFR
✅ Drop-In✓ In Stock
$0.48 / Unit
View Datasheet →ATTINY204-SSFR
✅ Drop-In✓ In Stock
$0.48 / Unit
View Datasheet →ATTINY20-XU Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit AVR RISC microcontroller |
| Maximum Clock Frequency | 12 MHz |
| Flash Memory | 2 KB |
| Flash Organization | 1K x 16 |
| SRAM | 128 bytes |
| General-Purpose I/O Lines | 12 |
| General-Purpose Working Registers | 16 |
| Timer/Counter 0 | 8-bit timer/counter with 2 PWM channels |
| Timer/Counter 1 | 16-bit timer/counter |
| ADC | 10-bit |
| Serial Interfaces | UART, SPI, and TWI |
| Supply Voltage Options | 2.5 V, 3.3 V, and 5 V |
| Package | 14-pin TSSOP |
| Mounting Type | Surface Mount |
| Throughput | Up to 12 MIPS |
| Programming | In-System Programmable flash memory |
| Temperature Classification | Industrial |
ATTINY20-XU 14-pin tssop Pin Configuration Guide
Pin configuration for ATTINY20-XU (14-pin tssop 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 ATTINY20-XU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATTINY20-XU is suitable for 6 applications: Compact Sensor Node, LED Dimming Controller, Small Motor Controller, Industrial Control Module, Low-Cost Communication Peripheral, Battery-Powered IoT Device.
Compact Sensor Node
The ATTINY20-XU fits compact sensor nodes because its 10-bit ADC can sample analog inputs while 12 general-purpose I/O lines support sensors, indicators, and local control logic. A UART, SPI, or TWI interface can connect the node to a host or another embedded device without requiring a larger microcontroller. The 2 KB flash and 128 bytes SRAM fit simple measurement and threshold routines, although application code must be sized against the actual firmware and stack requirements. Keep analog routing short and follow the datasheet recommendations for ADC reference and input conditioning.
Recommended
LED Dimming Controller
ATTINY20-XU is suitable for basic LED dimming and lighting control because the verified feature set includes an 8-bit timer/counter with two PWM channels. The two channels can drive independent brightness levels or coordinate a paired lighting arrangement, while 12 I/O lines provide control inputs and status outputs. The 12 MHz maximum clock supports time-based PWM generation, but the exact PWM frequency, resolution, and timer configuration must follow the ATtiny20 datasheet. External transistor or MOSFET stages should be selected for the LED current and voltage rather than driving load current directly from an I/O pin.
Recommended
Small Motor Controller
The ATTINY20-XU can implement a small motor or actuator controller using its two PWM channels and multiple I/O lines for direction, limit, or enable signals. The 10-bit ADC allows current or position feedback when the sensing chain supports the required input range. The controller should use external transistor or MOSFET power stages because the MCU is intended for logic and control, not direct high-current motor drive. Validate PWM dead time, startup behavior, stall conditions, thermal margins, and supply transients in the complete system rather than relying on the 12 MHz clock specification alone.
Recommended
Industrial Control Module
ATTINY20-XU is appropriate for small industrial control modules where an 8-bit MCU must combine discrete I/O, analog monitoring, and serial communications. Its UART, SPI, and TWI interfaces allow connection to sensors, converters, or a supervisory controller, while the industrial-temperature listing supports designs targeting industrial conditions. The 2 KB flash and 128 bytes SRAM require disciplined firmware sizing and may limit complex protocol stacks. For safety-critical or high-reliability systems, review watchdog, brownout, ESD, isolation, and regulatory requirements separately.
Recommended
Low-Cost Communication Peripheral
ATTINY20-XU works as a low-cost communication peripheral when a system needs a compact AVR endpoint rather than a host processor. The available UART, SPI, and TWI interfaces support common embedded communication tasks, and the 12 I/O lines can handle protocol-related status or control signals. Firmware must account for the limited 2 KB flash and 128 bytes SRAM, especially when adding buffering or framing logic. Confirm baud-rate tolerance, SPI mode, TWI address behavior, and pin multiplexing from the manufacturer documentation before using it as a bridge.
Recommended
Battery-Powered IoT Device
ATTINY20-XU can serve as the low-power control element in a small battery-powered IoT device when its ADC and serial interfaces are sufficient for the sensing and communications architecture. The verified manufacturer description identifies the device as low-power, and its compact TSSOP-14 package supports space-constrained boards. Actual battery life cannot be derived from the available snippets because sleep currents, active current, clock settings, and regulator efficiency were not supplied. Measure the complete power budget and configure unused pins and peripherals according to the datasheet to avoid unintended current consumption.
Recommended
Recommended Products Summary
Engineering reference data for ATTINY20-XU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATTINY20-XUR | ATTINY20-XU | ATTINY40-XU | ATtiny20 | ATTINY20 |
|---|---|---|---|---|---|---|
| Package | 14-pin TSSOP | 14-pin TSSOP - same package family; verify exact mechanical drawing | 14-pin TSSOP - same ordering target | 14-pin TSSOP - related device; package similarity is not replacement proof | 14-pin TSSOP designation depends on ordering suffix | 14-pin TSSOP designation depends on ordering suffix |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Controller Type | 8-bit AVR RISC microcontroller | ATtiny20-family 8-bit AVR microcontroller | ATtiny20-family 8-bit AVR microcontroller | ATtiny40-family 8-bit AVR microcontroller; comparison details limited | ATtiny20 8-bit AVR family designation | ATtiny20 8-bit AVR family designation |
Key Differentiators
- Compact 14-pin TSSOP control solution (vs ATTINY40-XU)
- Integrated analog and timing peripherals (vs ATTINY20-XUR)
- Established distributor sourcing (vs ATTINY40-XU)
Design Notes
Route the ATtiny20 power pins, decoupling capacitor, ground return, and programming signals first. Place the decoupling capacitor close to the device supply pins and keep analog inputs away from switching nodes and high-current return paths. Because the supplied data does not include a verified complete pin table, confirm every pin assignment against the current Microchip datasheet before fabrication.
The verified distributor data identifies 2.5 V, 3.3 V, and 5 V options, but it does not provide the complete electrical limits. Select the regulator and external components against the exact supply range, ADC reference, clock requirements, and I/O current limits in the manufacturer datasheet. Estimated: if the design uses a 3.3 V rail, verify timing and output levels at the minimum specified operating voltage rather than assuming 5 V logic compatibility.
For ADC measurements, use a short analog trace, a defined reference, and input filtering matched to the measurement bandwidth. Keep the analog ground return compact and separate noisy switching-current paths from the reference node. The verified material identifies a 10-bit ADC but does not provide accuracy, input impedance, acquisition time, or reference limits, so those values must be taken from the full datasheet.
Do not treat ATTINY20-XUR or a family-level ATtiny20 designation as automatically interchangeable with ATTINY20-XU. Verify the ordering suffix, package drawing, temperature grade, voltage range, pin names, and electrical characteristics. Also size firmware for only 2 KB of flash and 128 bytes of SRAM, and account for boot, stack, and peripheral-library overhead before selecting the MCU.
Compliance Information
The supplied verified web data does not contain RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations for ATTINY20-XU. These fields remain unknown rather than inferred from the package or distributor listing.
