ATTINY20-CCU - 8-bit AVR MCU, 2KB Flash, 15-UFBGA | Microchip
MPN: ATTINY20-CCU ✓ ActiveATTINY20-CCU Overview
An 8-bit AVR microcontroller is a compact RISC-based controller that executes most instructions within a single clock cycle. The ATTINY20 belongs to the TinyAVR family, combining low-power operation with timer, counter, ADC, and PWM resources in a small package. Its architecture follows the MCU hierarchy from application-specific controller to embedded processor, RISC microcontroller, and integrated circuit.
The device provides 2 KB of ISP Flash for program storage and 128 bytes of SRAM for working memory. Its 12 I/O lines support digital control and multiplexing functions, while the 16 general-purpose working registers support efficient register-based execution. Peripheral resources include an 8-bit timer/counter with two PWM channels, a 16-bit timer, and a 2-channel 10-bit ADC, according to the Microchip ATtiny20 product page.
The ATtiny20 uses the compact AVR enhanced RISC architecture and can approach 1 MIPS per MHz under suitable instruction conditions. ISP programming permits firmware updates without removing the device from a finished assembly, which simplifies production programming, in-system upgrades, and low-volume manufacturing. Its 15-UFBGA package reduces board area compared with leaded or larger-surface-mount packages, although board layout and prototyping require fine-pitch assembly capability.
Typical uses include compact sensor controllers, LED lighting modules, battery-powered monitoring devices, simple motor or fan controls, and embedded keypad interfaces. The two PWM channels can drive indicators or small mechanical loads, the ADC supports analog sensing, and the GPIO count is suitable for modest control loops where a larger MCU would be unnecessary.
Designers should confirm the exact pin mapping and exposed-pad requirements against the manufacturer datasheet before layout because no compatible package SVG was available for verification. Firmware must also fit within 2 KB, and applications must account for the limited 128-byte SRAM. The 3x3 mm land pattern is mechanically compact but requires careful reflow control and inspection.
This page consolidates the verified ATtiny20 family specifications, distributor inventory and pricing, sourcing links, and design considerations that are not presented together on a manufacturer datasheet summary. It also documents the limited availability of verified pin-for-pin replacements for this unusually small 15-UFBGA configuration.
Drop-in alternatives for ATTINY20-CCU — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
ATTINY20-CCUR
✅ Drop-In📋 Reference alternative (not in catalog)
ATTINY20-SSUR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATTINY20-CCU Maximum Ratings & Electrical Characteristics
| Microcontroller Family | ATtiny20 / TinyAVR |
| Architecture | 8-bit AVR enhanced RISC |
| Maximum Clock Frequency | 12 MHz |
| Flash Memory | 2 KB (1K x 16), in-system programmable |
| SRAM | 128 bytes |
| General-Purpose I/O Lines | 12 |
| General-Purpose Working Registers | 16 |
| ADC | 2-channel, 10-bit |
| 8-Bit Timer/Counter | 1 with 2 PWM channels |
| 16-Bit Timer | 1 |
| Program Memory Type | ISP Flash |
| Package | 15-UFBGA, 3x3 mm |
| Mounting Type | Surface Mount |
| Operating Temperature Grade | Industrial grade |
| ADC Resolution | 10 bits |
| Program Memory Instruction Word Size | 16 bits |
ATTINY20-CCU 15-ufbga, 3x3 mm Pin Configuration Guide
Pin configuration for ATTINY20-CCU (15-ufbga, 3x3 mm 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-CCU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATTINY20-CCU is suitable for 6 applications: Compact Analog Sensor Controller, LED Lighting and Indicator Control, Battery-Powered Remote Monitoring, Small Motor and Fan Controller, Keypad and User-Interface Module, Programmable Low-Power Control Node.
Compact Analog Sensor Controller
The ATTINY20-CCU fits compact sensor nodes because its 2-channel, 10-bit ADC can sample two analog inputs while 12 GPIO lines handle switches, indicators, and an interface to a host. With 2 KB of ISP Flash and 128 bytes of SRAM, the device can run a focused filtering and thresholding routine without a larger microcontroller. Place the MCU beside the sensor network to keep traces short and reduce board area through the 15-UFBGA package. Verify supply voltage, ADC reference accuracy, and noise performance in the full datasheet before fixing the analog front end.
Recommended
LED Lighting and Indicator Control
The ATTINY20-CCU can control grouped LEDs, status indicators, or simple lighting strips because its 8-bit timer/counter provides two PWM channels and 12 GPIO lines handle enable, mode, and button inputs. The 2 KB Flash budget suits fixed patterns, fading sequences, and debounced local controls rather than elaborate effects storage. Its 15-UFBGA 3x3 mm package saves area in compact luminaires and panel modules. Use transistor or MOSFET drive stages for LED current above GPIO capability, and confirm timer frequency resolution and PWM output mapping against the datasheet.
Recommended
Battery-Powered Remote Monitoring
ATTINY20-CCU is suitable for small battery-operated monitors that periodically read a simple sensor, evaluate thresholds, and report state over a discrete digital interface. Its 128 bytes of SRAM supports short acquisition and processing buffers, while 2 KB of ISP Flash supports a compact firmware image. The 12 GPIO lines can supervise a wake button, fault indicator, and external switch. Because the verified excerpts did not provide sleep current or active current figures, battery-life calculations must use the complete manufacturer datasheet and the selected operating voltage and clock configuration.
Recommended
Small Motor and Fan Controller
The ATTINY20-CCU can manage a low-power motor, fan, or small solenoid when two PWM channels and 12 GPIO lines are sufficient for drive logic, direction control, and fault inputs. Its 8-bit timer/counter provides a straightforward base for fixed-speed or duty-cycle control without a large control algorithm. Because GPIO drive current is limited, use a suitable transistor or MOSFET driver and include appropriate protection and flyback paths. Verify maximum pin drive current, PWM frequency, and start-up behavior in the full electrical specification before committing the power stage.
Recommended
Keypad and User-Interface Module
ATTINY20-CCU fits small keypad, menu, or front-panel modules because 12 GPIO lines can scan several switches and drive a limited set of indicators while 2 KB of Flash stores debounce logic and short command sequences. Its 16 general-purpose working registers and AVR RISC architecture support responsive event handling without external memory. The 15-UFBGA footprint allows the controller to sit close to the switch matrix and reduce board area in densely populated human-interface assemblies. Keep the firmware within the 2 KB limit and verify external pull-up arrangements against the pin-multiplexing table.
Recommended
Programmable Low-Power Control Node
The ATTINY20-CCU works well as a programmable logic node for fan-out, relay sequencing, signal conditioning, or local actuator control where each node has a fixed, modest task. ISP Flash permits firmware to be loaded during assembly and revised without a socket, while the 12 MHz AVR core handles timing and state-machine tasks. Its 2 KB program limit and 128-byte SRAM are appropriate for distributed control that does not require buffering or protocol stacks. Assess brownout thresholds, reset behavior, and power-consumption modes in the complete datasheet before deploying it across multiple boards.
Recommended
Recommended Products Summary
Engineering reference data for ATTINY20-CCU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATTINY20-CCUR | ATTINY20-SSUR |
|---|---|---|---|
| Package | 15-UFBGA (3x3) | 15-UFBGA (3x3) | 15-UFBGA (3x3) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Frequency | 12 MHz | 12 MHz | 12 MHz |
| Flash Memory | 2 KB | 2 KB | 2 KB |
| SRAM | 128 bytes | 128 bytes | 128 bytes |
| General-Purpose I/O | 12 lines | 12 lines | 12 lines |
| ADC | 2-channel, 10-bit | 2-channel, 10-bit | 2-channel, 10-bit |
| Architecture | 8-bit AVR enhanced RISC | 8-bit AVR enhanced RISC | 8-bit AVR enhanced RISC |
Key Differentiators
- Extremely compact 3x3 mm land pattern for space-constrained boards (vs ATTINY24A-CCU)
- Dedicated analog and PWM resources in a small controller (vs ATTINY24V-10SSUR)
- Verified same-device sourcing option in the identical 15-UFBGA footprint (vs ATTINY20-CCUR)
Design Notes
Do not begin the land pattern from general BGA conventions. The verified source identifies a 15-UFBGA 3x3 mm package, but no 15-ball library SVG or complete ball table was supplied. Download the full ATtiny20 package drawing, confirm whether a ground center ball or thermal-pad arrangement is used, and cross-check it against the PCB footprint and assembly stencil. Incorrect interpretation of a center ball can prevent soldering, damage the device, or produce unreliable analog and power performance.
Estimated power behavior: with a 3.3 V supply and a 2 mA average operating current, the ideal average supply power is 3.3 V x 2 mA = 6.6 mW. This is only an arithmetic estimate, not a datasheet specification, and actual consumption depends on the ATtiny20 clock source, active versus sleep duty cycle, peripherals, and voltage. Confirm active, idle, and sleep current before sizing a coin-cell or energy-harvesting budget, and provide local bypass capacitance in accordance with the manufacturer layout guidance.
Firmware size is the primary design constraint: 2 KB of Flash leaves little room for a large framework, bootloader, logging subsystem, or protocol stack. Confirm the linked binary size and reserve space for future fixes, while measuring stack consumption because SRAM is only 128 bytes. Avoid porting a larger ATtiny library without checking its RAM and Flash assumptions. ISP programming simplifies updates, but production designs still need a controlled programming and firmware-versioning process.
Compliance Information
The verified distributor and manufacturer excerpts did not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. ATTINY20-CCU is a general-purpose industrial-grade MCU rather than an automotive-qualified variant, so AEC-Q100 is treated as not applicable.
