ATTINY13-20PI Equivalent & Substitute Parts

Part Overview

The ATTINY13-20PI is an 8-bit AVR microcontroller from Microchip Technology's ATtiny series, 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 currently listed as obsolete, making identification of compatible alternatives essential for ongoing design support and production continuity.

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
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V
Data Converters	A/D 4x10b
Number of I/O	6
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
Supplier Device Package	8-PDIP

Substitute Part Grouping Explanation

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

Core processor architecture (AVR)
Core size (8-Bit)
Operating frequency (20MHz)
Program memory capacity and type (1KB FLASH)
EEPROM and RAM sizes (64 x 8 each)
Supply voltage range (2.7V ~ 5.5V)
Peripheral feature set (Brown-out Detect/Reset, POR, PWM, WDT)
Number of I/O pins (6)
Data converter specifications (A/D 4x10b)
Package type (8-DIP)

The ATTINY13-20PU meets all these criteria and qualifies as a direct substitute. The primary distinction between these parts is packaging format and product status, not functional or electrical characteristics.

Parameter Comparison

Parameter	ATTINY13-20PI	ATTINY13-20PU
Manufacturer	Microchip Technology	Microchip Technology
Series	AVR® ATtiny	AVR® ATtiny
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
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V	2.7V ~ 5.5V
Data Converters	A/D 4x10b	A/D 4x10b
Number of I/O	6	6
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Oscillator Type	Internal	Internal
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Through Hole	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Supplier Device Package	8-PDIP	8-PDIP
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging Format	Tube	Tube

Engineering Selection Recommendations

The ATTINY13-20PU is the direct functional equivalent of the ATTINY13-20PI. Both devices share identical electrical specifications, memory configurations, peripheral sets, and package dimensions. The ATTINY13-20PU is preferred for new designs and ongoing production due to its active product status and ROHS3 compliance. The ATTINY13-20PI, classified as obsolete, presents supply chain risk and does not meet current RoHS requirements. For applications currently using the ATTINY13-20PI, migration to the ATTINY13-20PU requires no design modifications, as pin configuration, electrical characteristics, and functional behavior are identical.

Frequently Asked Questions (FAQ)

Q: Are the ATTINY13-20PI and ATTINY13-20PU pin-compatible?

A: Yes. Both devices use the 8-DIP (0.300", 7.62mm) package with identical pin assignments. Direct socket substitution is possible without PCB modification.

Q: What is the difference between the ATTINY13-20PI and ATTINY13-20PU?

A: The primary differences are product status and compliance certification. The ATTINY13-20PI is obsolete and RoHS non-compliant, while the ATTINY13-20PU is active and ROHS3 compliant. Electrical and functional specifications are identical.

Q: Can I use the ATTINY13-20PU as a drop-in replacement for the ATTINY13-20PI?

A: Yes. The ATTINY13-20PU is a direct substitute with no design changes required. Firmware, circuit topology, and operating parameters remain unchanged.

Q: Why is the ATTINY13-20PI listed as obsolete?

A: Microchip Technology has discontinued the ATTINY13-20PI in favor of the ATTINY13-20PU, which meets modern compliance standards and offers improved supply availability.

Q: Are there any electrical differences between these parts?

A: No. Both devices operate at 20MHz, support 2.7V to 5.5V supply voltage, and provide identical memory capacity, I/O count, and peripheral functionality.

Q: What packaging options are available for the ATTINY13 series at 20MHz?

A: The ATTINY13-20PU is supplied in tube packaging. Both the ATTINY13-20PI and ATTINY13-20PU use the 8-PDIP package format.

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