ATTINY426-XF - 20MHz 4KB AVR MCU | Microchip Technology
N.º de pieza: ATTINY426-XF ✓ ActivoATTINY426-XF Descripción general
A microcontroller is a compact semiconductor that integrates a processor core, program memory, data memory, and peripherals such as timers, serial interfaces, and input/output ports into one device. The tinyAVR 2 family belongs to the broader AVR microcontroller hierarchy, combining an 8-bit RISC architecture with event-driven peripherals and flexible low-power operation. This makes the family suitable for systems that need deterministic peripheral handling without the cost and complexity of a larger general-purpose processor.
The ATTINY426 provides 4 KB of Flash for firmware, 512 bytes of SRAM for working data, and 128 bytes of nonvolatile EEPROM for configuration or retained parameters. Its AVR CPU includes a hardware multiplier and can run at up to 20 MHz. The manufacturer family documentation also identifies flexible low-power architecture, an Event System, and pin-count options ranging from 14 to 24 pins for related family members.
The ATTINY426-XF is specified in a 20-pin SSOP package, making it suitable for compact PCB layouts where gull-wing leads are easier to inspect and assemble than fine-pitch QFN leads. Its 8-bit architecture is appropriate for supervisory functions, button and menu interfaces, sensor conditioning, actuator timing, communications, and embedded control loops. Compared with larger MCUs, the device limits application complexity while providing enough memory and processing speed for compact control tasks.
Typical uses include industrial sensor modules, motor-control helpers, power-supply controllers, building automation, appliance control, and low-cost connected devices. Designers should confirm peripheral assignments, clock configuration, pin multiplexing, and programming requirements against the manufacturer data sheet before committing a footprint. The SSOP outline also provides adequate lead pitch for conventional assembly methods, although exposed-pad thermal considerations do not apply to this package.
When designing around the ATTINY426-XF, treat power consumption and clock choice as part of the functional specification. A lower clock rate can reduce dynamic power consumption when the application does not require 20 MHz operation, while sleep modes and event-driven peripherals can reduce activity between external events. Decoupling capacitors should be placed directly beside the supply pins, and unused inputs should be configured to avoid floating states.
This product page combines the manufacturer family specification, package and memory details, source citations, replacement guidance, and practical design considerations. It also distinguishes same-family alternatives from a true cross-brand replacement, helping engineers evaluate MCU migration requirements without overlooking pin compatibility, firmware differences, peripheral assignments, or qualification constraints.
Alternativas directas para ATTINY426-XF — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
ATTINY424-XF
✅ Sustitución directa ⚠️ Especificaciones sin verificarConsulte el precio
Ver hoja de datos →ATTINY427-XF
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ATTINY824-XF
✅ Sustitución directa ⚠️ Especificaciones sin verificarConsulte el precio
Ver hoja de datos →ATTINY826-XF
✅ Sustitución directa ⚠️ Especificaciones sin verificarConsulte el precio
Ver hoja de datos →ATTINY827-XF
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ATTINY426-XF Valores máximos y características eléctricas
| Product Type | 8-bit AVR RISC microcontroller |
| Product Family | tinyAVR 2 |
| Frecuencia de reloj máxima | 20 MHz |
| Flash Memory | 4 KB |
| Program Memory Organization | 4K x 8 bits |
| SRAM | 512 bytes |
| EEPROM | 128 bytes |
| CPU Architecture | AVR with hardware multiplier |
| Encapsulado | 20-pin SSOP |
| Package Code | SSOP |
| Number of Terminals | 20 |
| Terminal Form | Gull wing |
| Package Shape | Rectangular |
| Temperature Grade | Automotive |
| Maximum Operating Temperature | 125 °C |
| Lower Speed Option | 8 MHz at 2.7 V |
| Device Technology | CMOS |
| Architecture | Event-driven, flexible low-power architecture |
Guía de configuración de pines de ATTINY426-XF rectangular
Configuración de pines para ATTINY426-XF (encapsulado rectangular). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para ATTINY426-XF.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
ATTINY426-XF es adecuado para 6 aplicacións: Industrial Sensor Conditioning, Motor Control and Actuator Sequencing, Power-Supply Supervision, Building Automation Nodes, Appliance and User-Interface Control, Automotive Auxiliary Control Module.
Industrial Sensor Conditioning
The ATTINY426-XF fits compact sensor-conditioning modules that must combine analog measurement, digital filtering, and local control. Its 20 MHz AVR CPU provides enough throughput for time-based control and digital filtering, while 4 KB of Flash accommodates a boot routine, peripheral setup, calibration, and communication services. The 512-byte SRAM supports working state and protocol buffers, and 128 bytes of EEPROM can preserve calibration constants or configuration values across power cycles. Use the manufacturer pin-description table to assign the ADC, timers, serial interfaces, and I/O lines. The 20-pin SSOP package also leaves a practical footprint for conventional PCB assembly. For industrial deployment, evaluate input protection, sensor excitation, reference accuracy, EMI behavior, and the temperature requirements of the complete enclosure rather than treating the microcontroller rating as an automatic system qualification.
Recomendado
Motor Control and Actuator Sequencing
The ATTINY426-XF is appropriate for small motor, valve, relay, or stepper-control subsystems where timing and sequencing are more important than high processor bandwidth. Its AVR CPU with hardware multiplier can execute up to 20 MHz, supporting PWM generation, position-state tracking, debouncing, limit detection, and fault handling within its 4 KB Flash budget. The 512-byte SRAM can hold motion state, while 128 bytes of EEPROM can retain a configuration or diagnostic count. Place the device between the controller and power-driver interface, keep switching-current paths away from sensitive input traces, and validate every motor supply level against the device pin limits. The 20-pin SSOP outline is useful when manual inspection or cost-effective assembly is more important than the smaller area of a QFN package.
Recomendado
Power-Supply Supervision
The ATTINY426-XF can serve as a supervisory controller in a programmable power module, battery charger, or distributed power-conversion assembly. At up to 20 MHz, the device can coordinate voltage measurements, timed fault checks, state-machine transitions, and service communications while remaining within a compact 20-pin SSOP footprint. Its 128-byte EEPROM is useful for retaining configuration identifiers or counters, although critical calibration data should use a protected nonvolatile approach where appropriate. Connect the MCU supply through a regulator with appropriate startup behavior, isolate noisy switching nodes, and use the datasheet pin assignment for ADC, timer, and communication functions. Firmware should define safe states for every power stage and ensure that a reset, brownout, or communication failure cannot inadvertently enable the converter.
Recomendado
Building Automation Nodes
The ATTINY426-XF is suitable for distributed building-automation nodes that monitor switches, resolve debounce timing, drive indicator outputs, and maintain a local communication endpoint. Its event-driven tinyAVR 2 architecture is well matched to systems that spend substantial time waiting for external events. With 20 MHz maximum operation, 4 KB Flash, 512-byte SRAM, and 128-byte EEPROM, it can support a focused controller rather than a general-purpose Linux-class device. In a wall-mounted product, use the temperature rating as only one part of the enclosure design and account for humidity, ESD, power-supply transients, and long-term memory retention. The gull-wing SSOP package supports visual inspection and board-level rework, which can simplify maintenance in installed equipment.
Recomendado
Appliance and User-Interface Control
The ATTINY426-XF can implement the control logic for appliances, small equipment, and human-interface modules that combine buttons, LEDs, displays, and a simple serial controller. A 20 MHz AVR core provides adequate responsiveness for debouncing, menu-state updates, indicator timing, and communication retries, while 4 KB of Flash constrains the firmware to a focused control role. The device should be used according to the manufacturer pin-muxing table so that timer outputs, communication signals, and interrupt-capable inputs remain available on the selected package. In a mains-connected appliance, keep the MCU and programming interfaces on the protected low-voltage side of the isolation barrier. The 20-pin SSOP package is particularly convenient where board spacing permits and production teams prefer visible leads for inspection.
Recomendado
Automotive Auxiliary Control Module
The ATTINY426-XF is associated with an automotive temperature grade and a 125 °C maximum operating temperature, making it relevant to auxiliary automotive control tasks where its 20-pin SSOP package is acceptable. Potential functions include actuator sequencing, switch aggregation, diagnostic logging, and localized sensor handling. The 4 KB Flash and 512-byte SRAM require disciplined firmware sizing, so applications with extensive diagnostics or gateway functionality may need a larger member of the tinyAVR 2 family. Validate the complete device ordering code, qualification status, operating-voltage limits, transient immunity, EMC behavior, and software-development process for the vehicle program. The SSOP footprint also gives assembly teams accessible leads, but it occupies more board area than an equivalent VQFN option.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATTINY426-XF — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATTINY424-XF | ATTINY427-XF | ATTINY824-XF | ATTINY826-XF | ATTINY827-XF |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP |
| CPU Architecture | 8-bit AVR with hardware multiplier | 8-bit AVR with hardware multiplier | 8-bit AVR with hardware multiplier | 8-bit AVR with hardware multiplier | 8-bit AVR with hardware multiplier | 8-bit AVR with hardware multiplier |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Flash Memory | 4 KB | 2 KB | 4 KB | 8 KB | 8 KB | 8 KB |
| SRAM | 512 bytes | 256 bytes | 1 KB | 1 KB | 1 KB | 1 KB |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Architecture | Event-driven tinyAVR 2 | Event-driven tinyAVR 2 | Event-driven tinyAVR 2 | Event-driven tinyAVR 2 | Event-driven tinyAVR 2 | Event-driven tinyAVR 2 |
Diferenciadores clave
- Matches the ATtiny427 memory footprint while retaining the lower program-memory requirement of the ATtiny426 class (frente a ATTINY427-XF)
- Provides 4 KB Flash where the closest lower-memory family member provides only 2 KB (frente a ATTINY424-XF)
- Maintains the same 20 MHz tinyAVR 2 performance class while offering scalable memory alternatives (frente a ATTINY826-XF)
- Uses inspectable gull-wing leads rather than a fine-pitch QFN footprint (frente a ATTINY826-MFR)
Notas de diseño
Place the decoupling capacitor directly between each supply pin and its nearest ground reference, keeping the connection loop short. Route programming and reset signals away from switching-node and motor-drive traces. Because the ATTINY426-XF uses a gull-wing 20-pin SSOP, preserve solderable lead length for inspection and rework, and check the manufacturer package drawing for the actual land pattern rather than generating it from body dimensions alone.
Budget the MCU supply for active processing, timer and serial peripherals, and cold-start behavior. The 20 MHz maximum clock and 8 MHz option at 2.7 V do not independently define the complete operating-voltage envelope, so use the electrical-characteristics tables for each clock mode. If the design derives power from a switching converter, validate startup sequencing and voltage ramps because brownout behavior can alter firmware execution and EEPROM writes.
Do not migrate directly to ATTINY826-MFR on an ATTINY426-XF board because the former uses a 20-pin VQFN package while the latter uses 20-pin SSOP. Even between same-package tinyAVR 2 devices, review peripheral pin multiplexing, memory size, interrupt vectors, timer channels, and register compatibility. Rebuild or qualify the firmware for the selected replacement rather than assuming the family name guarantees binary or board-level equivalence.
Use the manufacturer pin-description table as the authoritative source for alternate-function assignments. Keep reset, clock, programming, and interrupt-sensitive pins away from noisy or high-current paths, and configure unused inputs in firmware so they cannot float. In analog signal-conditioning designs, separate sensor traces from digital switching paths and use a quiet ground strategy around the MCU and its reference components.
Información de cumplimiento
The product is identified as an automotive-temperature-grade device with a maximum operating temperature of 125 °C, but explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals statements were not established.
