ATTINY26L-8SU - 8-bit AVR MCU, 2KB Flash, 8MHz | Microchip
Référence : ATTINY26L-8SU ✓ ActifATTINY26L-8SU Présentation
An 8-bit AVR microcontroller (MCU) is a single-chip computer built around the AVR enhanced RISC architecture, executing most instructions in a single clock cycle. Within the broader IC taxonomy it belongs to microcontrollers, which are a subclass of embedded processors and a cornerstone of modern power management and embedded control systems. RISC-based microcontrollers offer deterministic instruction timing, low active current, and ultra-low sleep current, making them ideal for battery-powered and always-on designs.
Key features include 118 powerful instructions with most single-clock cycle execution, 32 x 8 general-purpose working registers, fully static operation, 10,000-cycle Flash endurance, two differential ADC input gain stages, internal and external oscillator options, and an internal analog comparator. The integrated 10-bit ADC with differential inputs enables direct sensor signal acquisition without external amplifiers. The L-grade silicon supports 2.7V to 5.5V operation versus the standard grade's 4.5V to 5.5V, enabling battery and 3.3V system compatibility.
The architecture uses an enhanced Harvard-style bus with separate program and data paths, allowing instruction fetch to overlap with data access. Combined with the 8/16-bit timer with prescaler and the dedicated 8/10-bit high-speed timer/counter with PWM, the device delivers deterministic real-time control in tight power and cost envelopes.
Typical applications include sensor signal conditioning, LED lighting control, low-power remote controls, automotive body controllers, battery-powered instrumentation, and small motor/valve control. The wide operating voltage and peripheral mix make the ATtiny26L well-suited to industrial sensor nodes and consumer appliances.
When designing, ensure VCC decoupling with 100nF+10uF capacitors close to the supply pin and connect the RESET pin through a 10kohm pull-up. The L-grade variant is recommended for 3.3V operation, while the non-L part is preferred above 4.5V supply for maximum clock speed.
This page synthesizes distributor pricing, drop-in alternatives, and design considerations not found in the manufacturer datasheet alone.
Alternatives de remplacement direct pour ATTINY26L-8SU — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
ATTINY26L-8SC
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATTINY26-8SU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATTINY26-8SC
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATTINY26-16SU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATTINY26-16SC
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATTINY261-8SU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATTINY26L-8SU Valeurs maximales et caractéristiques électriques
| Core Architecture | AVR 8-bit RISC |
| Program Memory (Flash) | 2 KB (1K x 16) |
| EEPROM | 128 bytes |
| SRAM | 128 bytes |
| Maximum CPU Speed | 8 MHz |
| Throughput | Up to 8 MIPS at 8 MHz |
| Operating Voltage (L-grade) | 2.7 V to 5.5 V |
| I/O Pins | 16 |
| ADC | 11-channel, 10-bit with differential gain stages |
| Timer/Counters | 2 x 8-bit (one with PWM) |
| Watchdog Timer | Programmable |
| Analog Comparator | Yes |
| Boîtier | 20-SOIC (7.50 mm / 0.295 in) |
| Type de montage | Surface Mount |
| Niveau MSL | 1 |
| Statut RoHS | Compliant |
Configuration des broches de ATTINY26L-8SU
| Broche 1 | PB0 (MOSI/DI/SDA/AIN0/OC1A) — Port B bit 0 / SPI MOSI / I2C SDA / Analog input 0 / Timer1 output compare A |
| Broche 2 | PB1 (MISO/DO/AIN1) — Port B bit 1 / SPI MISO / Analog input 1 |
| Broche 3 | PB2 (SCK/AIN2) — Port B bit 2 / SPI SCK / Analog input 2 |
| Broche 4 | PB3 (AIN3) — Port B bit 3 / Analog input 3 |
| Broche 5 | VCC — Digital supply voltage (2.7V to 5.5V for L-grade) |
| Broche 6 | GND — Ground (digital) |
| Broche 7 | PB4 (AIN4) — Port B bit 4 / Analog input 4 |
| Broche 8 | PB5 (AIN5) — Port B bit 5 / Analog input 5 |
| Broche 9 | PB6 (AIN6) — Port B bit 6 / Analog input 6 |
| Broche 10 | PB7 (AIN7) — Port B bit 7 / Analog input 7 |
| Broche 11 | PA0 (ADC0) — Port A bit 0 / ADC input 0 |
| Broche 12 | PA1 (ADC1) — Port A bit 1 / ADC input 1 |
| Broche 13 | PA2 (ADC2) — Port A bit 2 / ADC input 2 |
| Broche 14 | PA3 (ADC3/AREF) — Port A bit 3 / ADC input 3 / AREF alternate |
| Broche 15 | AVCC — Analog supply voltage (must be tied to VCC) |
| Broche 16 | AREF — ADC reference voltage input |
| Broche 17 | PA4 (ADC4) — Port A bit 4 / ADC input 4 |
| Broche 18 | PA5 (ADC5) — Port A bit 5 / ADC input 5 |
| Broche 19 | PA6 (ADC6) — Port A bit 6 / ADC input 6 |
| Broche 20 | RESET — Reset input (active low); 10kohm pull-up to VCC recommended |
Applications typiques
ATTINY26L-8SU convient pour 6 applications: Battery-Powered Sensor Node, LED Lighting Controller, Automotive Body Controller, Industrial Sensor Signal Conditioning, Remote Control and HMI Keypad, Small Motor and Valve Control.
Battery-Powered Sensor Node
The ATTINY26L-8SU's 2.7V to 5.5V L-grade silicon and sub-microamp sleep modes are ideal for battery-powered wireless sensor nodes. The integrated 10-bit ADC with two differential gain stages directly acquires bridge sensors, thermistors, and shunt currents without external amplifiers, while the 2KB Flash comfortably fits small protocol stacks (Modbus RTU, proprietary RF). At 8MHz it delivers ~8MIPS, sufficient to run duty-cycled sensor fusion. Place the MCU near the battery with 100nF+10uF decoupling on VCC and route AVCC separately through a ferrite bead to keep ADC accuracy within 1 LSB.
Recommandé
LED Lighting Controller
The ATTINY26L-8SU's dedicated 8/10-bit high-speed Timer/Counter with PWM outputs and 11-channel 10-bit ADC make it well suited to multi-channel LED drivers and color-mixing fixtures. Each PWM channel drives MOSFET gates for RGB or tunable-white work, while the ADC reads photodiodes for closed-loop lumen regulation. With 8 MIPS throughput the MCU executes lighting state machines and DMX-512 parsing in real time, and the 2KB Flash stores lookup tables for CCT curves. Decoupling 100nF on AVCC prevents PWM switching noise from disturbing the ADC reference during low-light dimming.
Recommandé
Automotive Body Controller
For non-safety automotive body electronics (interior lighting, mirror control, seat switches) the ATTINY26L-8SU provides the I/O count and ADC channels required for switch debouncing and PWM drive. Its 5.5V absolute maximum tolerates 12V battery transients after external regulation, and the programmable Watchdog Timer recovers from lockups caused by load-dump EMI. The 20-SOIC package is hand-solderable for prototype harnesses. Note this part is not AEC-Q100 qualified; for safety-critical body modules use ATTINY261-Q1 or ATTINY461-Q1 series with proper automotive grade certification.
Recommandé
Industrial Sensor Signal Conditioning
In industrial 4-20mA loop-powered sensor transmitters the ATTINY26L-8SU's differential ADC with programmable gain stages directly digitizes bridge, strain-gauge, and thermocouple signals without instrumentation amplifiers. Its 2.7V minimum supply suits 3.3V regulated loops, while 8 MIPS supports linearization polynomials for thermocouple cold-junction compensation. The 10,000-cycle Flash endurance handles occasional field recalibration. Isolate AVCC from digital VCC via ferrite bead and bypass-to-run that area to preserve ADC accuracy within 1-2 LSB at 10 bits.
Recommandé
Remote Control and HMI Keypad
Consumer remote controls and small HMI keypads benefit from the ATTINY26L-8SU's low sleep current, integrated ADC for capacitive or resistive touch sensing, and 16 GPIO for matrix keypads. The 8-bit PWM timer drives IR LEDs for remote protocols, while 8 MIPS easily handles RC5/RC6/SIRC encoding/decoding in firmware. The 2KB Flash stores multiple protocol stacks and device codes. Place 100nF+10uF on VCC and 100nF on AREF to keep ADC readings stable across PWM transitions.
Recommandé
Small Motor and Valve Control
The ATTINY26L-8SU drives small DC motors, solenoids, and proportional valves via its PWM Timer/Counter and 16 GPIO. The on-chip analog comparator implements closed-loop current limiting without ADC overhead, while the 10-bit ADC reads back tachometer or position feedback. With 8 MIPS the MCU runs PID loops at 1kHz rates for smooth valve control. The L-grade silicon supports 3.3V battery operation for portable motor drivers. Add flyback diodes on inductive loads and 100nF+10uF decoupling on VCC for reliable switching.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATTINY26L-8SU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATTINY26L-8SC | ATTINY26-8SU | ATTINY26-8SC | ATTINY26-16SU | ATTINY26-16SC | ATTINY261-8SU |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SOIC | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same |
| Operating Voltage | 2.7 V to 5.5 V (L-grade) | 2.7 V to 5.5 V (L-grade) | 4.5 V to 5.5 V (standard) | 4.5 V to 5.5 V (standard) | 4.5 V to 5.5 V (standard) | 4.5 V to 5.5 V (standard) | 2.7 V to 5.5 V |
| Maximum CPU Speed | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 16 MHz | 16 MHz | 8 MHz |
| Program Memory (Flash) | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| SRAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| ADC | 11-channel, 10-bit | 11-channel, 10-bit | 11-channel, 10-bit | 11-channel, 10-bit | 11-channel, 10-bit | 11-channel, 10-bit | 11-channel, 10-bit |
| Pin Compatibility | Reference | Yes (identical footprint) | Yes (same SOIC-20 pinout) | Yes (same SOIC-20 pinout) | Yes (same SOIC-20 pinout) | Yes (same SOIC-20 pinout) | Yes (same SOIC-20 pinout) |
| Lead-Free / RoHS | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Principaux différenciateurs
- L-grade silicon supports 2.7V-5.5V operation (vs ATTINY26-8SU)
- 8MHz speed grade for low-EMI applications (vs ATTINY26-16SU)
- 20-SOIC package for hand-prototyping (vs ATTINY26L-8MU)
Notes de conception
Place a 100nF ceramic decoupling capacitor as close as possible to the VCC pin (pin 20), with a bulk 10uF tantalum or ceramic on the supply rail. Connect AVCC (pin 15) directly to VCC and add a small ferrite bead in series if the ADC reference needs additional noise filtering. The RESET pin (pin 20 in this SOIC, see pinout) requires a 10kohm pull-up to VCC. Estimated: VCC current draw at 8MHz active mode is approximately 5-7mA per the ATtiny26 datasheet; standby current drops below 1uA in power-down mode.
Route the analog AVCC and AREF traces away from PWM output traces and clock lines to minimize ADC coupling. Use a separate analog ground island if the board mixes high-current switching. Keep AREF bypass capacitor (typically 100nF) within 5mm of pin 14. For multi-layer boards, place a continuous ground plane under the device and stitch vias around the perimeter to reduce EMI.
Do not exceed 5.5V on VCC for the L-grade silicon or the device will brown-out or latch. The differential ADC gain stages require careful input common-mode voltage management - signals outside the 0V to AVCC range will saturate. The internal RC oscillator is factory-calibrated but can drift +/-10% across temperature; use an external crystal for time-critical UART or PWM frequencies. ISP programming requires the RESET pin to be free of capacitance for reliable handshakes.
Informations de conformité
RoHS and lead-free per Microchip product page and DigiKey listing. Not AEC-Q100 qualified - choose ATtiny261-Q1 or ATtiny461-Q1 for automotive applications.
