ATMEGA169L-8AI Equivalent & Substitute Parts

Part Overview

The ATMEGA169L-8AI is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 16KB FLASH memory, 1KB RAM, and 512 bytes EEPROM. This device operates at 8MHz with a supply voltage range of 2.7V to 5.5V and is housed in a 64-TQFP package. The part is classified as obsolete, making identification of suitable substitutes necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8-Bit
Speed	8MHz
Program Memory Size	16KB (8K x 16)
Program Memory Type	FLASH
EEPROM Size	512 x 8
RAM Size	1K x 8
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V
Data Converters	A/D 8x10b
Connectivity	SPI, UART/USART, USI
Peripherals	Brown-out Detect/Reset, LCD, POR, PWM, WDT
Operating Temperature	-40°C ~ 85°C
Package / Case	64-TQFP (14x14)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the ATMEGA169L-8AI is determined by the following critical parameters:

Core Architecture: AVR processor family
Memory Configuration: 16KB FLASH, 1KB RAM, 512 bytes EEPROM
Package Format: 64-TQFP (14x14) surface mount
Operating Specifications: 8MHz speed, -40°C to 85°C temperature range
Electrical Compatibility: Supply voltage range and peripheral feature set

The ATMEGA169PV-8AU qualifies as a direct substitute based on matching core architecture, memory capacity, package type, and operating temperature range. Both devices share identical program memory, EEPROM, and RAM configurations, along with equivalent peripheral sets and connectivity options.

Parameter Comparison

Parameter	ATMEGA169L-8AI	ATMEGA169PV-8AU	Compatibility
Manufacturer	Microchip Technology	Microchip Technology	Match
Core Processor	AVR	AVR	Match
Core Size	8-Bit	8-Bit	Match
Speed	8MHz	8MHz	Match
Program Memory Size	16KB (8K x 16)	16KB (8K x 16)	Match
Program Memory Type	FLASH	FLASH	Match
EEPROM Size	512 x 8	512 x 8	Match
RAM Size	1K x 8	1K x 8	Match
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V	1.8V ~ 5.5V	Substitute Range Wider
Data Converters	A/D 8x10b	A/D 8x10b	Match
Connectivity	SPI, UART/USART, USI	SPI, UART/USART, USI	Match
Peripherals	Brown-out Detect/Reset, LCD, POR, PWM, WDT	Brown-out Detect/Reset, LCD, POR, PWM, WDT	Match
Number of I/O	53	54	Substitute Higher
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C (TA)	Match
Package / Case	64-TQFP (14x14)	64-TQFP (14x14)	Match
Mounting Type	Surface Mount	Surface Mount	Match
Product Status	Obsolete	Active	Substitute Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Substitute Compliant

Engineering Selection Recommendations

The ATMEGA169PV-8AU is the recommended substitute for the obsolete ATMEGA169L-8AI. Selection is based on the following factors:

Product Status: The ATMEGA169L-8AI is classified as obsolete, while the ATMEGA169PV-8AU maintains active production status, ensuring long-term availability and supply chain continuity.

Regulatory Compliance: The ATMEGA169PV-8AU is ROHS3 compliant, whereas the original part is RoHS non-compliant. This compliance status is relevant for applications subject to environmental regulations.

Electrical Compatibility: The substitute device features an expanded supply voltage range (1.8V to 5.5V) compared to the original (2.7V to 5.5V), providing greater operational flexibility while maintaining full backward compatibility with existing 2.7V to 5.5V designs.

Functional Equivalence: Both devices share identical core architecture, memory configuration, package format, and peripheral feature sets. The substitute provides one additional I/O pin (54 versus 53), which does not impact compatibility in existing designs.

Packaging: Both parts are supplied in 64-TQFP (14x14) surface mount packages with identical pinout and mechanical dimensions, enabling direct PCB-level substitution.

Frequently Asked Questions (FAQ)

Q: Can the ATMEGA169PV-8AU be used as a direct replacement for the ATMEGA169L-8AI?

A: Yes. Both devices share identical core processor architecture, memory capacity (16KB FLASH, 1KB RAM, 512 bytes EEPROM), operating frequency (8MHz), package format (64-TQFP), and peripheral feature set. The substitute is pin-compatible and functionally equivalent for applications designed for the original part.

Q: What are the key differences between these two parts?

A: The primary differences are product status, regulatory compliance, and supply voltage range. The ATMEGA169PV-8AU is in active production with ROHS3 compliance and supports a lower minimum supply voltage (1.8V versus 2.7V). The substitute also provides one additional I/O pin. These differences do not affect compatibility in existing designs.

Q: Is the ATMEGA169PV-8AU suitable for low-voltage applications below 2.7V?

A: The ATMEGA169PV-8AU supports operation down to 1.8V supply voltage, whereas the original ATMEGA169L-8AI minimum is 2.7V. Applications requiring operation below 2.7V can utilize the substitute device's extended voltage range.

Q: Are there any package or pinout differences?

A: No. Both devices use identical 64-TQFP (14x14) surface mount packages with matching pinout and mechanical dimensions. Direct PCB substitution is possible without layout modifications.

Q: What is the availability status of the ATMEGA169PV-8AU?

A: The ATMEGA169PV-8AU is in active production status with substantial inventory availability. The original ATMEGA169L-8AI is obsolete and no longer manufactured.

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