ATTINY15L-1SU Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip ATTINY15L-1SU is an 8-bit AVR microcontroller with 1 KB Flash program memory, 64 bytes EEPROM, and 6 I/O pins in an 8-pin SOIC package. Operates at 1.6 V to 5.5 V supply with internal 1 MHz RC oscillator and integrated analog comparator. Available worldwide for cost-sensitive embedded applications requiring a minimal-footprint MCU.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- ATTINY15L-1SU Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1 KB Flash and 64-byte EEPROM with internal 1 MHz RC oscillator in an 8-pin SOIC enable complete standalone MCU designs with zero external clock components
- 1.6 V to 5.5 V operating range with low-power sleep modes suits battery-operated and energy-harvesting sensor designs
- Integrated 10-bit ADC with 4 input channels and analog comparator eliminates need for external signal-conditioning ICs in simple measurement applications
Applications
ATTINY15L-1SU is designed for minimal-cost, minimal-footprint embedded control tasks such as LED dimming, sensor threshold detection, and simple state machine implementations in consumer and industrial products. Its 1.6 V minimum operating voltage and low-power sleep modes make it well-suited for coin-cell and AAA battery-powered remote sensors, toys, and wearables. The 8-pin SOIC package enables easy PCB assembly in space-constrained designs where larger MCU packages would waste board area.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What are the Flash memory size, clock speed, and supply voltage range of ATTINY15L-1SU?
ATTINY15L-1SU includes 1 KB of in-system programmable Flash memory and a built-in 1 MHz internal RC oscillator, requiring no external crystal for basic operation. It operates from a wide supply voltage range of 1.6 V to 5.5 V, covering single-cell Li-ion, AAA alkaline, and 5 V regulated supplies. The '-L' suffix indicates the low-voltage version optimized for operation down to 1.6 V, ideal for battery-powered designs.
For a battery-powered LED controller, how many PWM channels and I/O pins does ATTINY15L-1SU offer?
ATTINY15L-1SU provides 6 general-purpose I/O pins in its 8-pin SOIC package, with at least 2 pins capable of PWM output using the internal 8-bit timer. This allows direct PWM-based LED brightness control on 2 channels without external drivers for low-current LEDs under 20 mA per pin. The 1.6 V–5.5 V supply range accommodates both 3 V coin-cell and 5 V regulated LED driver circuits in a single compact package.
How does ATTINY15L-1SU compare to ATTINY25 for ultra-low-cost designs requiring minimal I/O?
ATTINY15L-1SU offers 1 KB Flash and 6 I/O pins versus ATtiny25's 2 KB Flash and the same 8-pin package footprint, making ATTINY15L a lower-cost option when the application firmware fits within 1 KB. ATtiny25 provides more memory and additional peripheral features, but ATTINY15L suits simple tasks like switch debouncing, LED blinking, or basic sensor reads at a lower per-unit cost. Both share the 8-pin SOIC footprint, so PCB layouts are pin-compatible for easy upgrade if firmware grows.
Is ATTINY15L-1SU still recommended for new designs, and are there pin-compatible modern alternatives?
ATTINY15L-1SU is a legacy Microchip AVR device; its 8-pin SOIC footprint is shared with the newer ATtiny10, ATtiny13A, and ATtiny25 families, which offer improved peripherals, lower power, and longer product lifecycle. The '-1SU' suffix indicates SOIC-8 packaging, allowing direct pin-compatible substitution with ATtiny13A-SSU in most applications using 1 KB or less Flash. For new designs, ATtiny13A is generally recommended as it provides the same 1 KB Flash with better power management and guaranteed long-term availability.
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