ATTINY26L-8SC Equivalent & Substitute Parts

Part Overview

The ATTINY26L-8SC is an 8-bit AVR microcontroller from Microchip Technology's ATtiny series, featuring 2KB FLASH program memory, 128 bytes EEPROM, and 16 I/O pins in a 20-SOIC package. This device operates at 8MHz with a supply voltage range of 2.7V to 5.5V and includes integrated peripherals such as brown-out detection, power-on reset, PWM, and watchdog timer functionality.

The ATTINY26L-8SC is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this microcontroller.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8-Bit
Speed	8MHz
Program Memory Size	2KB (1K x 16)
Program Memory Type	FLASH
EEPROM Size	128 x 8
RAM Size	128 x 8
Number of I/O	16
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V
Data Converters	A/D 11x10b
Connectivity	USI
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Oscillator Type	Internal
Mounting Type	Surface Mount
Package / Case	20-SOIC (0.295", 7.50mm Width)

Substitute Part Grouping Explanation

Substitution of the ATTINY26L-8SC is determined by strict equivalence across the following critical parameters:

Core Architecture: AVR processor family
Memory Configuration: 2KB FLASH, 128 bytes EEPROM, 128 bytes RAM
I/O Count: 16 I/O pins
Operating Frequency: 8MHz
Supply Voltage Range: 2.7V ~ 5.5V
Package Type: 20-SOIC form factor
Peripheral Set: Brown-out Detect/Reset, POR, PWM, WDT, USI connectivity, A/D 11x10b

The ATTINY26L-8SU meets all substitution criteria. Both parts share identical core specifications, memory architecture, I/O configuration, and package form factor. The primary distinction lies in product status and operating temperature range, which do not affect functional substitutability in applications designed for the ATTINY26L-8SC.

Parameter Comparison

Parameter	ATTINY26L-8SC	ATTINY26L-8SU
Manufacturer	Microchip Technology	Microchip Technology
Core Processor	AVR	AVR
Core Size	8-Bit	8-Bit
Speed	8MHz	8MHz
Program Memory Size	2KB (1K x 16)	2KB (1K x 16)
Program Memory Type	FLASH	FLASH
EEPROM Size	128 x 8	128 x 8
RAM Size	128 x 8	128 x 8
Number of I/O	16	16
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V	2.7V ~ 5.5V
Data Converters	A/D 11x10b	A/D 11x10b
Connectivity	USI	USI
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Oscillator Type	Internal	Internal
Mounting Type	Surface Mount	Surface Mount
Package / Case	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)
Product Status	Obsolete	Active
Operating Temperature	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The ATTINY26L-8SU is a direct functional substitute for the ATTINY26L-8SC. Both devices are manufactured by Microchip Technology and share identical core specifications, memory architecture, I/O configuration, and package form factor.

The ATTINY26L-8SU offers the following advantages:

Active Product Status: Currently in production and supported by the manufacturer, ensuring long-term availability and technical support.
Extended Operating Temperature Range: -40°C to 85°C versus 0°C to 70°C, providing broader environmental compatibility.
RoHS3 Compliance: Meets current regulatory requirements for hazardous substance restrictions, whereas the ATTINY26L-8SC is RoHS non-compliant.

Selection of the ATTINY26L-8SU is appropriate for new designs, production continuity, and applications requiring compliance with current environmental and regulatory standards. The extended temperature range of the ATTINY26L-8SU accommodates industrial and extended-temperature applications without functional modification.

Frequently Asked Questions (FAQ)

Q: Are the ATTINY26L-8SC and ATTINY26L-8SU pin-compatible?

A: Yes. Both devices use the 20-SOIC package with identical pin assignments, I/O configuration, and electrical characteristics. Direct PCB substitution is possible without layout modification.

Q: What is the difference between the ATTINY26L-8SC and ATTINY26L-8SU?

A: The primary differences are product status, operating temperature range, and RoHS compliance. The ATTINY26L-8SC is obsolete with a 0°C to 70°C operating range and RoHS non-compliant status. The ATTINY26L-8SU is an active product with a -40°C to 85°C operating range and ROHS3 compliance. Functional specifications and memory architecture are identical.

Q: Can the ATTINY26L-8SU replace the ATTINY26L-8SC in existing applications?

A: Yes. The ATTINY26L-8SU is functionally equivalent and can replace the ATTINY26L-8SC in all applications designed for the original part. The extended operating temperature range and improved compliance status make it suitable for both legacy system maintenance and new production.

Q: What packaging options are available for these parts?

A: Both the ATTINY26L-8SC and ATTINY26L-8SU are supplied in 20-SOIC surface-mount packages. The ATTINY26L-8SC is available in standard packaging, while the ATTINY26L-8SU is supplied in tube packaging.

Q: Are there any firmware or software compatibility concerns when substituting these parts?

A: No. Both devices use the same AVR instruction set and core architecture. Firmware compiled for the ATTINY26L-8SC will execute identically on the ATTINY26L-8SU without modification.

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