ATMEGA16L-8PI Equivalent & Substitute Parts

Part Overview

The ATMEGA16L-8PI is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 16KB of FLASH program memory, 1KB of RAM, and 512 bytes of EEPROM. This device operates at 8MHz with a supply voltage range of 2.7V to 5.5V and includes integrated peripherals such as I2C, SPI, UART/USART connectivity, PWM, watchdog timer, and brown-out detection. The part is mounted in a 40-pin DIP package suitable for through-hole applications.

The ATMEGA16L-8PI is classified as obsolete. Locating equivalent or substitute components is necessary for ongoing system support, maintenance, and new production runs where original inventory is unavailable or depleted.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8-Bit
Speed	8MHz
Program Memory Size	16KB (8K x 16)
Program Memory Type	FLASH
RAM Size	1K x 8
EEPROM Size	512 x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 5.5V
Data Converters	A/D 8x10b
Number of I/O	32
Connectivity	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Through Hole
Package / Case	40-DIP (0.600", 15.24mm)
Supplier Device Package	40-PDIP

Substitute Part Grouping Explanation

Substitution of the ATMEGA16L-8PI is determined by strict equivalence across the following critical parameters:

Core Architecture: AVR processor family
Memory Configuration: 16KB FLASH, 1KB RAM, 512 bytes EEPROM
Operating Frequency: 8MHz
Supply Voltage Range: 2.7V ~ 5.5V
Peripheral Set: I2C, SPI, UART/USART, PWM, WDT, brown-out detection
I/O Count: 32 pins
Package Form Factor: 40-pin DIP with 0.600" (15.24mm) pitch
Temperature Range: -40°C ~ 85°C

The ATMEGA16L-8PU meets all these criteria and is therefore a direct functional equivalent. The primary difference between these parts is the packaging format: the ATMEGA16L-8PI uses a plastic DIP package, while the ATMEGA16L-8PU uses a tube packaging format. Both employ identical die and electrical specifications.

Parameter Comparison

Parameter	ATMEGA16L-8PI	ATMEGA16L-8PU
Manufacturer	Microchip Technology	Microchip Technology
Core Processor	AVR	AVR
Core Size	8-Bit	8-Bit
Speed	8MHz	8MHz
Program Memory Size	16KB (8K x 16)	16KB (8K x 16)
Program Memory Type	FLASH	FLASH
RAM Size	1K x 8	1K x 8
EEPROM Size	512 x 8	512 x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 5.5V	2.7V ~ 5.5V
Data Converters	A/D 8x10b	A/D 8x10b
Number of I/O	32	32
Connectivity	I2C, SPI, UART/USART	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Through Hole	Through Hole
Package / Case	40-DIP (0.600", 15.24mm)	40-DIP (0.600", 15.24mm)
Supplier Device Package	40-PDIP	40-PDIP
Product Status	Obsolete	Obsolete
RoHS Status	RoHS non-compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both the ATMEGA16L-8PI and ATMEGA16L-8PU are classified as obsolete products. Selection between these parts should be based on the following factors:

RoHS Compliance: The ATMEGA16L-8PU is ROHS3 compliant, while the ATMEGA16L-8PI is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements mandating RoHS compliance, the ATMEGA16L-8PU is the appropriate choice.

Packaging Format: The ATMEGA16L-8PI is supplied in standard plastic DIP packaging, while the ATMEGA16L-8PU is supplied in tube format. Both packages are compatible with 40-pin DIP sockets and breadboards. Selection depends on assembly process requirements and inventory management practices.

REACH Compliance: Both parts carry REACH Unaffected status, indicating no restriction under REACH regulations.

Moisture Sensitivity: Both parts have MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can the ATMEGA16L-8PU directly replace the ATMEGA16L-8PI in existing designs?

A: Yes. Both parts are electrically and functionally identical. They share the same die, memory configuration, operating frequency, supply voltage range, peripheral set, and pin count. The 40-pin DIP package form factor is identical between both parts, allowing direct socket substitution.

Q: What is the difference between the ATMEGA16L-8PI and ATMEGA16L-8PU?

A: The primary differences are packaging format and RoHS compliance status. The ATMEGA16L-8PI uses standard plastic DIP packaging and is RoHS non-compliant. The ATMEGA16L-8PU uses tube packaging and is ROHS3 compliant. All electrical and functional specifications are identical.

Q: Are there any pin compatibility issues between these parts?

A: No. Both parts use the 40-pin DIP package with 0.600" (15.24mm) pitch. Pin assignments, voltage levels, and signal definitions are identical. No PCB modifications or design changes are required for substitution.

Q: Why is RoHS compliance important for this substitution?

A: RoHS compliance indicates the absence of restricted substances such as lead, cadmium, and mercury. For applications subject to RoHS regulations or customer specifications requiring RoHS-compliant components, the ATMEGA16L-8PU must be selected. The ATMEGA16L-8PI, being RoHS non-compliant, may not meet regulatory or contractual requirements.

Q: Are both parts still in production?

A: No. Both the ATMEGA16L-8PI and ATMEGA16L-8PU are classified as obsolete. Availability is limited to existing inventory from authorized distributors. For new designs, consider evaluating current-generation AVR microcontrollers from Microchip Technology.

Q: What is the moisture sensitivity level for these parts?

A: Both parts have an MSL rating of 1 (Unlimited), indicating no moisture sensitivity. These parts do not require special moisture control during storage, handling, or assembly.

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