ATTINY13A-SF - 20MHz 1KB AVR MCU | Microchip Technology
MPN: ATTINY13A-SF ✓ ActiveATTINY13A-SF Overview
A microcontroller is a programmable control component that combines a CPU core, nonvolatile program memory, working memory, and peripherals on one integrated circuit. The ATtiny13A belongs to the TinyAVR family and uses the AVR enhanced RISC architecture. Its instruction set executes most instructions in a single clock cycle, allowing clock speed to be balanced against power consumption in battery-operated equipment.
The ATTINY13A-SF includes 90 powerful AVR instructions, eight general-purpose working registers, brown-out detection, power-on reset, a watchdog timer, and four 10-bit ADC channels. Its small memory footprint suits simple state machines, sensor interfaces, LED control, timers, and compact consumer accessories. The 20 MHz maximum clock provides additional timing margin for protocol handling and control loops.
The ATtiny13A is based on low-power CMOS technology and is designed for both active and low-power operation. The manufacturer describes the picoPower architecture as a way to optimize power consumption while maintaining execution throughput. The 1.8 V to 5.5 V operating range permits operation from single-cell and low-voltage systems as well as conventional 3.3 V or 5 V rails.
Typical applications include battery-powered sensors, simple LED and motor-control boards, compact remote controls, consumer appliances, hobby projects, and small embedded control modules. The ATTINY13A can be programmed through In-Circuit Serial Programming, while the MPLAB Snap debug interface supports in-circuit debugging through the device I/O and reset lines.
When designing a board, verify the SOIC-8 footprint, pin 1 orientation, supply decoupling, programming access, and the voltage range of every connected peripheral. Use the manufacturer datasheet for the complete pin description, electrical characteristics, fuse settings, and recommended application circuits.
Drop-in alternatives for ATTINY13A-SF — 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 ATTINY13A-SF (same form factor and footprint) — differing in Package, Programming Interface, Register File, ADC Resolution, Architecture.
ATTINY13A-SSU
✅ Drop-InContact for price
View Datasheet →ATTINY13A-SNR
✅ Drop-In📋 Reference alternative (not in catalog)
ATTINY13A-SH
✅ Drop-InContact for price
View Datasheet →ATTINY13A-SU
✅ Drop-InContact for price
View Datasheet →ATTINY13A-SF Maximum Ratings & Electrical Characteristics
| Architecture | 8-bit AVR enhanced RISC |
| Product Family | TinyAVR |
| Maximum Clock Frequency | 20 MHz |
| Flash Memory | 1 KB |
| EEPROM Memory | 64 bytes |
| SRAM | 64 bytes |
| Register File | 32 bytes |
| Operating Voltage Range | 1.8 V to 5.5 V |
| Maximum Throughput | 20 MIPS at 20 MHz |
| ADC Resolution | 10-bit |
| ADC Channels | 4 channels |
| General-Purpose Working Registers | 8 |
| Instruction Set | 90 AVR instructions |
| Package | 8-pin SOIC |
| Program Memory Type | ISP Flash |
| Peripheral Functions | Brown-out detection, power-on reset, PWM, and watchdog timer |
| Programming Interface | In-Circuit Serial Programming (ICSP) |
ATTINY13A-SF Pin Configuration
| Pin 1 | PB1 — General-purpose input/output pin |
| Pin 2 | PB0 — General-purpose input/output pin |
| Pin 3 | GND — Ground reference |
| Pin 4 | VCC — Power supply input |
| Pin 5 | PB3/ADC3 — General-purpose input/output and ADC channel 3 |
| Pin 6 | PB2/ADC2 — General-purpose input/output and ADC channel 2 |
| Pin 7 | PB4/ADC4 — General-purpose input/output and ADC channel 4 |
| Pin 8 | PB5/ADC5 — General-purpose input/output and ADC channel 5 |
Typical Applications
ATTINY13A-SF is suitable for 6 applications: Battery-Powered Sensor Node, LED Status and Lighting Controller, Compact Remote Control, Simple Motor and Relay Control, IoT Device Interface and State Controller, Embedded Control and Hobby Projects.
Battery-Powered Sensor Node
The ATTINY13A-SF is well suited to a compact sensor node because its low-power CMOS AVR core operates from 1.8 V to 5.5 V and includes a four-channel 10-bit ADC. Connect the sensor output to the ADC pins, use the timer and watchdog functions for periodic sampling, and place the MCU into a low-power state between measurements. The 1 KB Flash and 64-byte SRAM limit the software to compact filtering and control logic, but they are adequate for simple environmental, contact, or proximity sensing.
Recommended
LED Status and Lighting Controller
Use the ATTINY13A-SF for LED status indicators, decorative lighting, or a simple dimming controller where the required code size remains small. Its eight general-purpose working registers and PWM peripheral allow multiple indicators or one PWM output to be managed without an external display controller. The 20 MHz clock provides timing headroom for debouncing and animation, while the 1 KB program memory keeps the firmware compact. Use current-limiting resistors or a driver circuit for LED loads.
Recommended
Compact Remote Control
The ATTINY13A-SF can implement a compact button-based remote control for a consumer accessory, toy, or simple appliance. Its low operating-voltage range supports battery-powered operation, and the fast AVR execution core can debounce switches and encode button events while the device is active. The limited 1 KB Flash is appropriate for a small state machine rather than a large protocol library. Confirm the intended carrier, coding method, and standby-current target before finalizing the board.
Recommended
Simple Motor and Relay Control
ATTINY13A-SF can supervise a low-power relay, motor, solenoid, or actuator when the application requires only basic sequencing and limited feedback. Its PWM and timer resources are useful for pulse-width control, while the ADC can monitor an analog feedback signal within its input range. A MOSFET or driver stage is still required for most loads because the MCU pins are control signals, not direct power outputs. Add protection against inductive transients and verify stall-current conditions.
Recommended
IoT Device Interface and State Controller
The ATTINY13A-SF can act as the low-power local controller in a small IoT accessory, handling button input, indicator LEDs, and simple sensor supervision while another device handles network communication. Its four 10-bit ADC channels and 64-byte SRAM are useful for compact peripheral management, although the 1 KB Flash is not sufficient for a modern TCP/IP stack. Define a simple serial interface between the ATtiny13A and the communications module to keep firmware modular and predictable.
Recommended
Embedded Control and Hobby Projects
ATTINY13A-SF is a practical choice for learning embedded control, prototyping timers, and building compact automation experiments. The AVR instruction set and 20 MHz clock make timing examples easy to understand, while ISP allows programming and updates without removing the device. The ATtiny13A datasheet supplies the register, fuse, and peripheral information needed for repeatable experiments. Keep project code within the 1 KB Flash limit and use the four ADC channels only after checking their pin-sharing requirements.
Recommended
Recommended Products Summary
Engineering reference data for ATTINY13A-SF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATTINY13 | ATTINY13A-SNR | ATTINY13A-SH | ATTINY13A-SU |
|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Architecture | 8-bit AVR enhanced RISC | 8-bit AVR | 8-bit AVR enhanced RISC | 8-bit AVR enhanced RISC | 8-bit AVR enhanced RISC |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Flash Memory | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Programming | ISP | ISP | ISP | ISP | ISP |
Key Differentiators
- Updated AVR architecture within the same compact 8-SOIC footprint (vs ATTINY13)
- Clear ATtiny13A function set for embedded control (vs ATTINY13A-SNR)
- Compact ADC-enabled control in eight pins (vs ATTINY13A-SH)
Design Notes
Place the supply decoupling capacitor close to the VCC pin and keep the return path to GND short. The ATtiny13A-SF supports operation from 1.8 V to 5.5 V, but the allowed clock frequency, ADC accuracy, and output timing can depend on supply voltage. Confirm the minimum rail for the configured clock and peripheral conditions in the manufacturer electrical-characteristics table before setting the system voltage.
Preserve access to the ISP programming pins and reset function when laying out the 8-pin SOIC footprint. Keep the PCB edge, connectors, and tall components away from the programmer access area. Verify pin 1 orientation against the package drawing and verify that the 8-SOIC land pattern matches the assembled device orientation; an incorrect footprint or rotated part can prevent ISP programming.
Do not treat the 1 KB Flash and 64-byte SRAM limits as expandable. Use compact firmware, avoid large buffers, and move protocol processing to an external module when necessary. Also check ADC pin multiplexing because the analog inputs share pins with port functions. Review the fuse configuration for the intended clock source before programming, since an unintended fuse state can change timing or startup behavior.
For analog measurements, use a stable reference, route the analog input away from switching nodes, and follow the recommended input impedance and sampling arrangement in the manufacturer datasheet. Four ADC channels are available, but their shared package pins may restrict simultaneous peripheral use. Add filtering and grounding techniques suited to the sensor source rather than assuming the ADC input can directly accept high-impedance or noisy signals.
Compliance Information
The available manufacturer and distributor information identifies the device as an active Microchip Technology ATtiny13A microcontroller, but it does not provide explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status for ATTINY13A-SF.