ATTINY13A-SSH Equivalent & Substitute Parts

Part Overview

The ATTINY13A-SSH is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 1KB FLASH program memory, 64 bytes EEPROM, and 64 bytes RAM. This device operates at up to 20MHz with an internal oscillator and includes integrated peripherals such as brown-out detection, power-on reset, PWM, and watchdog timer functionality. The part is currently listed as obsolete, making identification of compatible substitute components essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	ATTINY13A-SSH
Manufacturer	Microchip Technology
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)	1.8V ~ 5.5V
Data Converters	A/D 4x10b
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the ATTINY13A-SSH is determined by strict equivalence across the following critical parameters:

Core Architecture: AVR 8-bit processor
Memory Configuration: 1KB FLASH program memory, 64 bytes EEPROM, 64 bytes RAM
Speed Rating: 20MHz maximum operating frequency
I/O Count: 6 I/O pins
Voltage Range: 1.8V to 5.5V supply compatibility
Peripheral Set: Brown-out detection, power-on reset, PWM, watchdog timer
Package Type: 8-SOIC surface mount package with 0.154" (3.90mm) width
Compliance: ROHS3 compliance and REACH unaffected status

The ATTINY13A-SSU meets all these criteria and is identified as a direct substitute. The primary distinction between these parts is product status: the ATTINY13A-SSH is obsolete, while the ATTINY13A-SSU is active production.

Parameter Comparison

Parameter	ATTINY13A-SSH	ATTINY13A-SSU	Match
Manufacturer	Microchip Technology	Microchip Technology	✓
Core Processor	AVR	AVR	✓
Core Size	8-Bit	8-Bit	✓
Speed	20MHz	20MHz	✓
Program Memory Size	1KB (512 x 16)	1KB (512 x 16)	✓
Program Memory Type	FLASH	FLASH	✓
EEPROM Size	64 x 8	64 x 8	✓
RAM Size	64 x 8	64 x 8	✓
Number of I/O	6	6	✓
Voltage Supply (Vcc/Vdd)	1.8V ~ 5.5V	1.8V ~ 5.5V	✓
Data Converters	A/D 4x10b	A/D 4x10b	✓
Oscillator Type	Internal	Internal	✓
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	✓
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Moisture Sensitivity Level (MSL)	2 (1 Year)	2 (1 Year)	✓
REACH Status	REACH Unaffected	REACH Unaffected	✓
Product Status	Obsolete	Active	Different

Engineering Selection Recommendations

The ATTINY13A-SSU is the direct substitute for the ATTINY13A-SSH. Both parts are manufactured by Microchip Technology and share identical electrical, mechanical, and functional specifications. The ATTINY13A-SSU maintains active production status, ensuring availability for new designs and ongoing production requirements.

Both parts carry ROHS3 compliance certification and REACH unaffected status, meeting current environmental and regulatory requirements. The 8-SOIC package footprint is identical between both variants, allowing direct PCB layout compatibility without redesign.

Selection of the ATTINY13A-SSU is appropriate for applications currently using the ATTINY13A-SSH, with no functional or performance trade-offs. The active production status of the ATTINY13A-SSU provides supply chain continuity and long-term availability assurance.

Frequently Asked Questions (FAQ)

Q: Can the ATTINY13A-SSU directly replace the ATTINY13A-SSH in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The ATTINY13A-SSU uses the same 8-SOIC package, operates at identical voltage and temperature ranges, and provides the same memory configuration and peripheral set. No PCB modifications or firmware changes are required.

Q: What is the difference between ATTINY13A-SSH and ATTINY13A-SSU?

A: The primary difference is product status. The ATTINY13A-SSH is obsolete, while the ATTINY13A-SSU is in active production. All technical specifications, including core processor, memory, speed, I/O count, and package type, are identical.

Q: Are there any compliance differences between these parts?

A: No. Both parts carry identical ROHS3 compliance and REACH unaffected status. Moisture sensitivity level (MSL 2, 1 Year) is the same for both variants.

Q: What is the 8-SOIC package specification?

A: The 8-SOIC package is a surface mount configuration with 0.154 inches (3.90mm) width. This package type is standard across both the ATTINY13A-SSH and ATTINY13A-SSU, ensuring identical PCB footprint compatibility.

Q: Can I use the ATTINY13A-SSU in applications requiring the full -40°C to 85°C operating temperature range?

A: Yes. The ATTINY13A-SSU is rated for -40°C to 85°C (TA) operation, matching the ATTINY13A-SSH specification. Both parts support the full industrial temperature range.

Q: Are there supply chain advantages to using the ATTINY13A-SSU?

A: Yes. The ATTINY13A-SSU is in active production with higher inventory availability compared to the obsolete ATTINY13A-SSH. This ensures reliable long-term supply for production and design continuity.

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