ATMEGA169-16AI Equivalent & Substitute Parts

Part Overview

The ATMEGA169-16AI is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 16KB FLASH memory, 1KB RAM, and 512 bytes EEPROM. Designed for embedded applications requiring low-power operation and integrated peripherals including LCD driver, PWM, and watchdog timer functionality. The device operates at 16MHz with a supply voltage range of 2.7V to 5.5V and is housed in a 64-TQFP package.

This part is classified as Obsolete. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing status and current compliance certifications.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8-Bit
Speed	16MHz
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
Number of I/O	54
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 (TA)
Package / Case	64-TQFP (14x14)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the ATMEGA169-16AI is determined by strict equivalence across the following critical parameters:

Core architecture and instruction set compatibility: AVR processor family Memory configuration: 16KB FLASH, 1KB RAM, 512 bytes EEPROM Operating frequency: 16MHz Electrical specifications: 2.7V to 5.5V supply voltage range I/O count: 54 pins Peripheral feature set: LCD driver, PWM, watchdog timer, brown-out detection, power-on reset Package form factor: 64-TQFP (14x14mm) Mounting technology: Surface mount

The ATMEGA169P-16AU meets all substitution criteria. This part maintains identical core functionality, memory architecture, and electrical characteristics while offering active product status and current compliance certifications.

Parameter Comparison

Parameter	ATMEGA169-16AI	ATMEGA169P-16AU	Match
Manufacturer	Microchip Technology	Microchip Technology	✓
Core Processor	AVR	AVR	✓
Core Size	8-Bit	8-Bit	✓
Speed	16MHz	16MHz	✓
Program Memory Size	16KB (8K x 16)	16KB (8K x 16)	✓
Program Memory Type	FLASH	FLASH	✓
EEPROM Size	512 x 8	512 x 8	✓
RAM Size	1K x 8	1K x 8	✓
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V	2.7V ~ 5.5V	✓
Number of I/O	54	54	✓
Data Converters	A/D 8x10b	A/D 8x10b	✓
Connectivity	SPI, UART/USART, USI	SPI, UART/USART, USI	✓
Peripherals	Brown-out Detect/Reset, LCD, POR, PWM, WDT	Brown-out Detect/Reset, LCD, POR, PWM, WDT	✓
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	✓
Package / Case	64-TQFP (14x14)	64-TQFP (14x14)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Product Status	Obsolete	Active	Substitute is Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Substitute is Compliant

Engineering Selection Recommendations

The ATMEGA169P-16AU is the direct functional equivalent for the obsolete ATMEGA169-16AI. Both devices share identical core architecture, memory configuration, operating frequency, electrical specifications, and peripheral feature set. Pin-for-pin compatibility and software compatibility are maintained.

The ATMEGA169P-16AU offers additional advantages for new designs and production continuity:

Product Status: Active manufacturing status ensures long-term availability and supply chain stability.

Compliance Certifications: ROHS3 compliant, meeting current environmental and regulatory requirements. The original ATMEGA169-16AI is RoHS non-compliant.

Manufacturing Verification: The ATMEGA169P-16AU is verified as programmable through DiGi-Electronics, confirming production readiness.

Packaging: Available in Tray packaging, suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Are the ATMEGA169-16AI and ATMEGA169P-16AU pin-compatible?

A: Yes. Both devices use the 64-TQFP (14x14mm) package with identical pin assignments and electrical characteristics. Direct PCB substitution is supported without layout modifications.

Q: Can firmware developed for the ATMEGA169-16AI run on the ATMEGA169P-16AU?

A: Yes. Both devices implement the same AVR instruction set architecture, memory organization, and peripheral register map. Existing firmware requires no modification.

Q: What is the difference between the ATMEGA169-16AI and ATMEGA169P-16AU?

A: The primary differences are product status and compliance certifications. The ATMEGA169-16AI is obsolete and RoHS non-compliant. The ATMEGA169P-16AU is in active production and ROHS3 compliant. Electrical and functional specifications are identical.

Q: Is the ATMEGA169P-16AU suitable for new product designs?

A: Yes. Active product status and current compliance certifications make the ATMEGA169P-16AU appropriate for new designs requiring 8-bit AVR microcontroller functionality with 16KB FLASH memory, integrated LCD driver, and extended peripheral support.

Q: Are there any supply chain considerations when transitioning from ATMEGA169-16AI to ATMEGA169P-16AU?

A: The ATMEGA169P-16AU is in active production with verified inventory availability. The obsolete status of the ATMEGA169-16AI makes the ATMEGA169P-16AU the recommended choice for production continuity and long-term component sourcing.

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