ATTINY13-20SQ Equivalent & Substitute Parts

Part Overview

The ATTINY13-20SQ is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 1KB of FLASH program memory, 64 bytes of EEPROM, and 64 bytes of RAM. This device operates at 20MHz 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 part is mounted in an 8-SOIC package with 6 I/O pins.

The ATTINY13-20SQ 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	20MHz
Program Memory Size	1KB (512 x 16)
Program Memory Type	FLASH
EEPROM Size	64 x 8
RAM Size	64 x 8
Number of I/O	6
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V
Data Converters	A/D 4x10b
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the ATTINY13-20SQ is determined by strict equivalence across the following critical parameters:

Core Architecture: AVR processor family
Memory Configuration: 1KB FLASH, 64 bytes EEPROM, 64 bytes RAM
I/O Count: 6 I/O pins
Operating Speed: 20MHz maximum frequency
Peripheral Set: Brown-out detection, POR, PWM, WDT
Package Type: 8-SOIC surface mount
Physical Dimensions: 0.209" × 5.30mm width
Compliance: ROHS3, REACH Unaffected, EAR99 classification

The ATTINY13A-SN meets all substitution criteria. This part maintains identical core functionality, memory architecture, I/O configuration, and package specifications. The primary distinction is product status: ATTINY13A-SN is active and widely available, whereas ATTINY13-20SQ is obsolete.

Parameter Comparison

Parameter	ATTINY13-20SQ	ATTINY13A-SN	Compatibility
Manufacturer	Microchip Technology	Microchip Technology	Identical
Core Processor	AVR	AVR	Identical
Core Size	8-Bit	8-Bit	Identical
Speed	20MHz	20MHz	Identical
Program Memory Size	1KB (512 x 16)	1KB (512 x 16)	Identical
Program Memory Type	FLASH	FLASH	Identical
EEPROM Size	64 x 8	64 x 8	Identical
RAM Size	64 x 8	64 x 8	Identical
Number of I/O	6	6	Identical
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V	1.8V ~ 5.5V	Compatible (ATTINY13A-SN supports lower minimum voltage)
Data Converters	A/D 4x10b	A/D 4x10b	Identical
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	Identical
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	8-SOIC (0.209", 5.30mm Width)	8-SOIC (0.209", 5.30mm Width)	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	Identical
Product Status	Obsolete	Active	ATTINY13A-SN actively manufactured and distributed

Engineering Selection Recommendations

The ATTINY13A-SN is the direct substitute for the ATTINY13-20SQ. Both parts share identical electrical specifications, memory architecture, peripheral configuration, and physical packaging. The ATTINY13A-SN offers the additional advantage of an extended minimum supply voltage range (1.8V versus 2.7V), providing greater operational flexibility in low-voltage applications.

Selection of ATTINY13A-SN is supported by:

Active product status with continuous manufacturing and distribution
Full compliance with ROHS3 and REACH requirements
Identical core functionality and pin configuration
Verified programmability through DiGi-Electronics
Established supply chain availability

The obsolete status of ATTINY13-20SQ necessitates transition to ATTINY13A-SN for new designs, production continuity, and long-term component sourcing.

Frequently Asked Questions (FAQ)

Q: Can ATTINY13A-SN be used as a direct replacement for ATTINY13-20SQ in existing designs?

A: Yes. Both parts are functionally equivalent across all critical parameters: core architecture, memory configuration, I/O count, operating frequency, peripheral set, and package type. No design modifications are required for substitution.

Q: What is the difference between ATTINY13-20SQ and ATTINY13A-SN?

A: The primary difference is product status. ATTINY13-20SQ is obsolete; ATTINY13A-SN is active. ATTINY13A-SN also supports a lower minimum supply voltage (1.8V versus 2.7V). All other electrical and mechanical specifications are identical.

Q: Are the packages physically identical?

A: Yes. Both parts use the 8-SOIC package with identical physical dimensions (0.209" × 5.30mm width). PCB footprints and assembly processes require no modification.

Q: Does ATTINY13A-SN have the same pin configuration?

A: Yes. Both parts have 6 I/O pins in the same 8-SOIC package configuration. Pin assignments and functionality are identical.

Q: What compliance certifications apply to ATTINY13A-SN?

A: ATTINY13A-SN is ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Moisture sensitivity level is 3 (168 hours).

Q: Is firmware compatibility maintained between these parts?

A: Yes. Both parts use the AVR instruction set and architecture. Existing firmware compiled for ATTINY13-20SQ executes without modification on ATTINY13A-SN.

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